Psyllid ID: psy10707

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Local Sequence Feature Prediction

Residue Number Marker
--------10--------20--------30--------40--------50--------60--------70--------80--------90-------100-------110-------120-------130
Protein Sequence
LSPSLVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK
Secondary Structure (PSIPRED)
cccccccEEEEccccccccccccccccccHHHHHHHHHHHHHHHHHHHccccHHHHHHHHHHHHHHHHHHccEEEEEccccccHHHHHHHHHHHHHHHHHHHHHHHHEEEEEccccHHHHHHHHHccccc
Secondary Structure Prediction (SSPRO)
cccccEEEcccccccccccccccccccccHHHHHHHHHHHHHHHHHHHccccHHHHHHHHHHHHHHHHHccHHEEEHccccccccccHHHHHHHHHHHHHHHHHHHHHHHcccccHHHHHHHHHHHHccc
Coil and Loop (DISEMBL)
lspslvkhfsttqvqhdaavhsksdhttLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLIlngggvvegTKKLWAIKSK
Flexible Loop (DISEMBL)
lspslvkhfsttqvqhdaavhsksdhTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNgggvvegtkklwaiksk
Low Complexity Region (SEG)
LSPSLVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK
Disordered region (IsUnstruct)
************************DHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI***
Disordered Region (DISOPRED)
*****************************WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIK**
Disordered Region (DISEMBL)
*************************HTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK
Disordered Region (DISPRO)
**PSLVKHFSTTQVQH*********HTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKS*
Transmembrane Helix (TMHMM)
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHoooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiii
Transmembrane Helix (HMMTOP)
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHHooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiii
Transmembrane Helix (MEMSAT)
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHooHHHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHHoooooooooooooooooo
TM Helix, Signal Peptide (MEMSAT_SVM)
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHooooHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHooooooooooooooooo
TM Helix, Signal Peptide (Phobius)
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHoooooHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHoooooooooooooooooo
Signal Peptide (SignalP HMM Mode)
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signal Peptide (SignalP NN Mode)
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Coiled Coils (COILS)
LSPSLVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK
Positional Conservation
no confident homologs detected

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Close Homologs for Annotation Transfer

Close Homologs in SWISS-PROT Database Detected by BLAST

Original result of BLAST against SWISS-PROT Database

ID	Length	Definition	RBH(Q2H)	RBH(H2Q)	Q cover	H cover	Identity	E-value
Query	130	2.2.26 [Sep-21-2011]
Q9VCI5	182	Putative succinate dehydr	yes	N/A	0.823	0.587	0.542	3e-29
A8WT26	145	Putative succinate dehydr	N/A	N/A	0.953	0.855	0.338	2e-15
Q6P355	152	Succinate dehydrogenase [	yes	N/A	0.869	0.743	0.355	2e-14
Q6AZR3	152	Succinate dehydrogenase [	N/A	N/A	0.838	0.717	0.379	2e-14
O62215	145	Putative succinate dehydr	yes	N/A	0.792	0.710	0.330	6e-14
Q6AZV0	152	Succinate dehydrogenase [	N/A	N/A	0.869	0.743	0.347	9e-14
Q68FN7	158	Succinate dehydrogenase [	yes	N/A	0.915	0.753	0.318	4e-13
Q5G2C6	158	Succinate dehydrogenase [	N/A	N/A	0.792	0.651	0.398	7e-13
Q95123	158	Succinate dehydrogenase [	yes	N/A	0.792	0.651	0.398	7e-13
P92507	156	Succinate dehydrogenase [	N/A	N/A	0.784	0.653	0.333	7e-13

>sp|Q9VCI5|DHSD_DROME Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Drosophila melanogaster GN=CG10219 PE=1 SV=1

 Score =  127 bits (318), Expect = 3e-29,   Method: Compositional matrix adjust.
 Identities = 58/107 (54%), Positives = 78/107 (72%)

Query: 24  SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEV 83
           S HT LWT+ER +SAGLLAVIPAA++ PS  L+  + +S+V+H+HWG+EA+VVDY RP V
Sbjct: 71  SSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALMAISVVIHTHWGVEAMVVDYMRPSV 130

Query: 84  VGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           VG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 131 VGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRFWAIKGK 177

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).
Drosophila melanogaster (taxid: 7227)

>sp|A8WT26|DHSD_CAEBR Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Caenorhabditis briggsae GN=sdhd-1 PE=3 SV=1

 Score = 80.9 bits (198), Expect = 2e-15,   Method: Compositional matrix adjust.
 Identities = 43/127 (33%), Positives = 75/127 (59%), Gaps = 3/127 (2%)

Query: 2   SPSLVKHFSTTQVQHDAAVHSK-SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALV 60
           +P L      T   +D A  SK  DH+  + +ER  + G+L ++PA+Y +    ++  L 
Sbjct: 21  APRLSTIVRATSTLNDGA--SKVPDHSMHFKLERLWAVGMLPILPASYFIHGPVMDAVLT 78

Query: 61  VSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEG 120
           V++ +H HWGI  +V DYARP V+G A AK  H+ VY+++ + LAGL++   N  G+ + 
Sbjct: 79  VALTLHIHWGIHGVVYDYARPYVIGEAAAKAAHIGVYLITGLLLAGLLHFNTNDVGITKA 138

Query: 121 TKKLWAI 127
            + ++++
Sbjct: 139 FELVFSL 145

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Caenorhabditis briggsae (taxid: 6238)

>sp|Q6P355|DHSD_XENTR Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Xenopus tropicalis GN=sdhd PE=2 SV=1

 Score = 77.8 bits (190), Expect = 2e-14,   Method: Compositional matrix adjust.
 Identities = 42/118 (35%), Positives = 67/118 (56%), Gaps = 5/118 (4%)

Query: 11  TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
           T+Q+      H+ S   ++ WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HW
Sbjct: 39  TSQIHTSPNHHAGSKAASMHWTSERALSVALLGLLPAAYLYPGAAMDYSLAAALTLHGHW 98

Query: 70  GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           G+  +V DY    V G A  K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct: 99  GLGQVVTDY----VHGDAKIKMANTSLFALSALTFAGLCYFNYHDVGICKAVSMLWSL 152

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Xenopus tropicalis (taxid: 8364)

>sp|Q6AZR3|DHSDA_XENLA Succinate dehydrogenase [ubiquinone] cytochrome b small subunit A, mitochondrial OS=Xenopus laevis GN=sdhd-a PE=2 SV=1

 Score = 77.4 bits (189), Expect = 2e-14,   Method: Compositional matrix adjust.
 Identities = 44/116 (37%), Positives = 65/116 (56%), Gaps = 7/116 (6%)

Query: 12  TQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGI 71
           T   H AA  + S H   WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HWG+
Sbjct: 44  TSQNHHAASKAASLH---WTSERALSVALLGLLPAAYLYPGAAVDYSLAAALTLHGHWGL 100

Query: 72  EALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             +V DY    V G A  K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct: 101 GQVVTDY----VHGDAKIKLANTSLFALSALTFAGLCYFNYHDVGICKAVAMLWSL 152

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Xenopus laevis (taxid: 8355)

>sp|O62215|DHSD_CAEEL Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Caenorhabditis elegans GN=sdhd-1 PE=3 SV=1

 Score = 75.9 bits (185), Expect = 6e-14,   Method: Compositional matrix adjust.
 Identities = 34/103 (33%), Positives = 64/103 (62%)

Query: 25  DHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVV 84
           DH+  + +ER  + G+L ++PA+Y +    ++  L V++ +H HWGI  +V DYARP V+
Sbjct: 43  DHSMHFKLERLWAVGMLPILPASYFIHGPVMDAVLTVALTLHIHWGIHGVVYDYARPYVI 102

Query: 85  GVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           G A AK  H+ VY+++ + L  L++   N  G+ +  + ++++
Sbjct: 103 GEAAAKAAHVGVYLITGLLLGALLHFNTNDVGITKAFELVFSL 145

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Caenorhabditis elegans (taxid: 6239)

>sp|Q6AZV0|DHSDB_XENLA Succinate dehydrogenase [ubiquinone] cytochrome b small subunit B, mitochondrial OS=Xenopus laevis GN=sdhd-b PE=2 SV=1

 Score = 75.5 bits (184), Expect = 9e-14,   Method: Compositional matrix adjust.
 Identities = 41/118 (34%), Positives = 66/118 (55%), Gaps = 5/118 (4%)

Query: 11  TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
           T+Q+      H+ S   ++ WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HW
Sbjct: 39  TSQIHTSPNHHAGSKAASMHWTGERALSVALLGLLPAAYLYPGAAMDYSLAAALTLHGHW 98

Query: 70  GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           G+  +V DY    V G    K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct: 99  GLGQVVTDY----VHGETKIKMANTSLFALSALTFAGLCYFNYHDVGICKAVAMLWSL 152

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Xenopus laevis (taxid: 8355)

>sp|Q68FN7|DHSDB_DANRE Succinate dehydrogenase [ubiquinone] cytochrome b small subunit B, mitochondrial OS=Danio rerio GN=sdhdb PE=2 SV=1

 Score = 73.6 bits (179), Expect = 4e-13,   Method: Compositional matrix adjust.
 Identities = 44/138 (31%), Positives = 70/138 (50%), Gaps = 19/138 (13%)

Query: 4   SLVKHFSTTQVQHD------AAVHSKSDH---------TTLWTIERFLSAGLLAVIPAAY 48
           SL++  +  Q  HD      A +H+   +         T  WT ER LS  LL++ P AY
Sbjct: 24  SLIRPLAVQQKDHDCSYLISARIHATPSNYAGSGSKAATMHWTGERILSIALLSLAPVAY 83

Query: 49  LVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLM 108
             PS A++Y+L  ++ +H HWG+  +V DY    V G A  K+ +  +++LS +T AGL 
Sbjct: 84  FCPSPAVDYSLAAALTLHGHWGLGQVVTDY----VHGDAKIKMANAGLFVLSTVTFAGLC 139

Query: 109 NLILNGGGVVEGTKKLWA 126
               +  G+ +    LW+
Sbjct: 140 YFNYHDVGICKAVALLWS 157

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Danio rerio (taxid: 7955)

>sp|Q5G2C6|DHSD_SHEEP Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Ovis aries GN=SDHD PE=2 SV=1

 Score = 72.4 bits (176), Expect = 7e-13,   Method: Compositional matrix adjust.
 Identities = 43/108 (39%), Positives = 60/108 (55%), Gaps = 5/108 (4%)

Query: 21  HSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYA 79
           HS S   +L WT ER +S  LL +IPAAYL P  A++Y+L  ++ +HSHWGI  +V DY 
Sbjct: 55  HSGSKAASLHWTGERVVSVLLLGLIPAAYLNPCSAMDYSLAATLTLHSHWGIGQVVTDY- 113

Query: 80  RPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
              V G A+ K     + +LS  T AGL     +  G+ +    LW +
Sbjct: 114 ---VHGDAVQKAAKTGLLVLSAFTFAGLCYFNYHDVGICKAVAMLWKL 158

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Ovis aries (taxid: 9940)

>sp|Q95123|DHSD_BOVIN Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Bos taurus GN=SDHD PE=2 SV=2

 Score = 72.4 bits (176), Expect = 7e-13,   Method: Compositional matrix adjust.
 Identities = 43/108 (39%), Positives = 60/108 (55%), Gaps = 5/108 (4%)

Query: 21  HSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYA 79
           HS S   +L WT ER +S  LL +IPAAYL P  A++Y+L  ++ +HSHWGI  +V DY 
Sbjct: 55  HSGSKAASLHWTGERVVSVLLLGLIPAAYLNPCSAMDYSLAATLTLHSHWGIGQVVTDY- 113

Query: 80  RPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
              V G A+ K     + +LS  T AGL     +  G+ +    LW +
Sbjct: 114 ---VHGDAVQKAAKTGLLVLSAFTFAGLCYFNYHDVGICKAVAMLWKL 158

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Bos taurus (taxid: 9913)

>sp|P92507|DHSD_ASCSU Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial OS=Ascaris suum PE=1 SV=2

 Score = 72.4 bits (176), Expect = 7e-13,   Method: Compositional matrix adjust.
 Identities = 34/102 (33%), Positives = 58/102 (56%)

Query: 26  HTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVG 85
           H TL+ IER+ +A ++ +IPAAY +    ++  L +++ +H HWG+  +V DY RP V+G
Sbjct: 55  HGTLFKIERYFAAAMVPLIPAAYFIHGREMDLCLALALTLHVHWGVWGVVNDYGRPFVLG 114

Query: 86  VALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             LA    +  YI +   LAGL+    +  G+    + +W +
Sbjct: 115 DTLAAAVRVGAYIFTACLLAGLLYFNEHDVGLTRAFEMVWEL 156

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).

Ascaris suum (taxid: 6253)

Close Homologs in the Non-Redundant Database Detected by BLAST

Original result of BLAST against Nonredundant Database

GI	Length	Definition	Q cover	H cover	Identity	E-value
Query	130
195449902	181	GK22767 [Drosophila willistoni] gi|19416	0.838	0.602	0.550	3e-28
194910250	182	GG12408 [Drosophila erecta] gi|190656736	0.946	0.675	0.5	9e-28
195573232	182	GD18356 [Drosophila simulans] gi|1942005	0.823	0.587	0.542	2e-27
195331399	182	GM23542 [Drosophila sechellia] gi|194121	0.823	0.587	0.542	2e-27
21355279	182	CG10219 [Drosophila melanogaster] gi|517	0.823	0.587	0.542	2e-27
195112228	182	GI22398 [Drosophila mojavensis] gi|19391	0.976	0.697	0.476	2e-27
195503010	182	GE23927 [Drosophila yakuba] gi|194184574	0.946	0.675	0.492	3e-27
38048543	179	similar to Drosophila melanogaster CG102	0.946	0.687	0.492	4e-27
195145422	184	GL24273 [Drosophila persimilis] gi|19845	0.838	0.592	0.513	6e-27
194745845	178	GF18741 [Drosophila ananassae] gi|190628	0.815	0.595	0.556	1e-26

>gi|195449902|ref|XP_002072276.1| GK22767 [Drosophila willistoni] gi|194168361|gb|EDW83262.1| GK22767 [Drosophila willistoni]

 Score =  129 bits (325), Expect = 3e-28,   Method: Compositional matrix adjust.
 Identities = 60/109 (55%), Positives = 80/109 (73%)

Query: 22  SKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARP 81
           S S HT LWT+ERF+SAGLLAVIPAA+L PS  L+  + +S+V+H+HWG+EA+VVDY RP
Sbjct: 67  SSSSHTALWTLERFVSAGLLAVIPAAFLAPSQVLDALMAISVVIHTHWGVEAMVVDYLRP 126

Query: 82  EVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           +VVG  ++K  H ++ +LS+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 127 QVVGNVVSKGAHAALIVLSVATLGGLFYFIKNDVGLANGIKRFWAIKGK 175

Source: Drosophila willistoni

Species: Drosophila willistoni

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|194910250|ref|XP_001982098.1| GG12408 [Drosophila erecta] gi|190656736|gb|EDV53968.1| GG12408 [Drosophila erecta]

 Score =  128 bits (321), Expect = 9e-28,   Method: Compositional matrix adjust.
 Identities = 63/126 (50%), Positives = 86/126 (68%), Gaps = 3/126 (2%)

Query: 5   LVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIV 64
           +V+  S +  +  AA    S HT LWT+ER +SAGLLAVIPAA++ PS  L+  L +S+V
Sbjct: 55  VVREISVSAPRMAAA---GSSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALLAISVV 111

Query: 65  MHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKL 124
           +H+HWG+EA+VVDY RP VVG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ 
Sbjct: 112 IHTHWGVEAMVVDYMRPSVVGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRF 171

Query: 125 WAIKSK 130
           WAIK K
Sbjct: 172 WAIKGK 177

Source: Drosophila erecta

Species: Drosophila erecta

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|195573232|ref|XP_002104599.1| GD18356 [Drosophila simulans] gi|194200526|gb|EDX14102.1| GD18356 [Drosophila simulans]

 Score =  127 bits (319), Expect = 2e-27,   Method: Compositional matrix adjust.
 Identities = 58/107 (54%), Positives = 78/107 (72%)

Query: 24  SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEV 83
           S HT LWT+ER +SAGLLAVIPAA++ PS  L+  + +S+V+H+HWG+EA+VVDY RP V
Sbjct: 71  SSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALMAISVVIHTHWGVEAMVVDYMRPSV 130

Query: 84  VGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           VG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 131 VGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRFWAIKGK 177

Source: Drosophila simulans

Species: Drosophila simulans

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|195331399|ref|XP_002032390.1| GM23542 [Drosophila sechellia] gi|194121333|gb|EDW43376.1| GM23542 [Drosophila sechellia]

 Score =  127 bits (319), Expect = 2e-27,   Method: Compositional matrix adjust.
 Identities = 58/107 (54%), Positives = 78/107 (72%)

Query: 24  SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEV 83
           S HT LWT+ER +SAGLLAVIPAA++ PS  L+  + +S+V+H+HWG+EA+VVDY RP V
Sbjct: 71  SSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALMAISVVIHTHWGVEAMVVDYMRPSV 130

Query: 84  VGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           VG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 131 VGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRFWAIKGK 177

Source: Drosophila sechellia

Species: Drosophila sechellia

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|21355279|ref|NP_651181.1| CG10219 [Drosophila melanogaster] gi|51701458|sp|Q9VCI5.1|DHSD_DROME RecName: Full=Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial; Short=CybS; AltName: Full=Succinate-ubiquinone reductase membrane anchor subunit; Flags: Precursor gi|7301044|gb|AAF56180.1| CG10219 [Drosophila melanogaster] gi|17945930|gb|AAL49010.1| RE42847p [Drosophila melanogaster] gi|17946412|gb|AAL49239.1| RE66546p [Drosophila melanogaster] gi|220948802|gb|ACL86944.1| CG10219-PA [synthetic construct] gi|220958222|gb|ACL91654.1| CG10219-PA [synthetic construct]

 Score =  127 bits (318), Expect = 2e-27,   Method: Compositional matrix adjust.
 Identities = 58/107 (54%), Positives = 78/107 (72%)

Query: 24  SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEV 83
           S HT LWT+ER +SAGLLAVIPAA++ PS  L+  + +S+V+H+HWG+EA+VVDY RP V
Sbjct: 71  SSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALMAISVVIHTHWGVEAMVVDYMRPSV 130

Query: 84  VGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           VG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 131 VGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRFWAIKGK 177

Source: Drosophila melanogaster

Species: Drosophila melanogaster

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|195112228|ref|XP_002000676.1| GI22398 [Drosophila mojavensis] gi|193917270|gb|EDW16137.1| GI22398 [Drosophila mojavensis]

 Score =  127 bits (318), Expect = 2e-27,   Method: Compositional matrix adjust.
 Identities = 62/130 (47%), Positives = 89/130 (68%), Gaps = 3/130 (2%)

Query: 1   LSPSLVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALV 60
           +SP +++  S +  +  +A  S   HT LWTIER LSAGLLAVIPAA++ PS  ++  L 
Sbjct: 52  ISPIVMREISVSAPRMASATGS---HTRLWTIERVLSAGLLAVIPAAFIAPSQVMDALLA 108

Query: 61  VSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEG 120
           +S+V+H+HWG+EA+VVDY RP VVG  + K+ H+++ ++S+  L GL  LI N  G+  G
Sbjct: 109 ISVVIHTHWGVEAMVVDYLRPSVVGNVVPKVAHIALILMSVAALGGLFYLIKNDIGLANG 168

Query: 121 TKKLWAIKSK 130
            K+ WAIK K
Sbjct: 169 IKRFWAIKGK 178

Source: Drosophila mojavensis

Species: Drosophila mojavensis

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|195503010|ref|XP_002098473.1| GE23927 [Drosophila yakuba] gi|194184574|gb|EDW98185.1| GE23927 [Drosophila yakuba]

 Score =  126 bits (317), Expect = 3e-27,   Method: Compositional matrix adjust.
 Identities = 62/126 (49%), Positives = 85/126 (67%), Gaps = 3/126 (2%)

Query: 5   LVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIV 64
           +V+  S +  +  AA    S HT LWT+ER +SAGLLAVIPAA++ PS  L+  L +S+V
Sbjct: 55  IVREISVSAPRMAAA---GSSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALLAISVV 111

Query: 65  MHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKL 124
           +H+HWG+EA+VVDY RP VVG  L K+ H+++ I+S+  L GL   I N  G+  G K+ 
Sbjct: 112 IHTHWGVEAMVVDYMRPSVVGNVLPKVAHIALIIISVAALGGLFYFIQNDVGLANGIKRF 171

Query: 125 WAIKSK 130
           WAIK K
Sbjct: 172 WAIKGK 177

Source: Drosophila yakuba

Species: Drosophila yakuba

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|38048543|gb|AAR10174.1| similar to Drosophila melanogaster CG10219, partial [Drosophila yakuba]

 Score =  125 bits (315), Expect = 4e-27,   Method: Compositional matrix adjust.
 Identities = 62/126 (49%), Positives = 85/126 (67%), Gaps = 3/126 (2%)

Query: 5   LVKHFSTTQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIV 64
           +V+  S +  +  AA    S HT LWT+ER +SAGLLAVIPAA++ PS  L+  L +S+V
Sbjct: 55  VVREISVSAPRMAAA---GSSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALLAISVV 111

Query: 65  MHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKL 124
           +H+HWG+EA+VVDY RP VVG  L K+ H+++ I+S+  L GL   I N  G+  G K+ 
Sbjct: 112 IHTHWGVEAMVVDYMRPSVVGNVLPKVAHIALIIISVAALGGLFYFIQNDVGLANGIKRF 171

Query: 125 WAIKSK 130
           WAIK K
Sbjct: 172 WAIKGK 177

Source: Drosophila yakuba

Species: Drosophila yakuba

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|195145422|ref|XP_002013692.1| GL24273 [Drosophila persimilis] gi|198452110|ref|XP_001358635.2| GA10165 [Drosophila pseudoobscura pseudoobscura] gi|194102635|gb|EDW24678.1| GL24273 [Drosophila persimilis] gi|198131791|gb|EAL27776.2| GA10165 [Drosophila pseudoobscura pseudoobscura]

 Score =  125 bits (313), Expect = 6e-27,   Method: Compositional matrix adjust.
 Identities = 56/109 (51%), Positives = 79/109 (72%)

Query: 22  SKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARP 81
           ++S HT +WT+ER +S GLLA+IPAA++ PS  L+  L +S+V+H+HWG+EA+VVDY RP
Sbjct: 68  AESSHTAMWTLERLVSVGLLAIIPAAFIAPSQILDALLAISVVIHAHWGVEAMVVDYMRP 127

Query: 82  EVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
            VVG  L K+ H+++ +LS+ TL GL   I N  G+  G K+ WAIK K
Sbjct: 128 SVVGNILPKVAHIALIVLSVATLGGLFYFIQNDVGLANGIKRFWAIKGK 176

Source: Drosophila persimilis

Species: Drosophila persimilis

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|194745845|ref|XP_001955395.1| GF18741 [Drosophila ananassae] gi|190628432|gb|EDV43956.1| GF18741 [Drosophila ananassae]

 Score =  124 bits (311), Expect = 1e-26,   Method: Compositional matrix adjust.
 Identities = 59/106 (55%), Positives = 76/106 (71%)

Query: 25  DHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVV 84
            HT LWTIER +S GLLAVIPAA++ PS  L+  L VS+V+H+HWG+EA+VVDY RP VV
Sbjct: 71  SHTMLWTIERLVSLGLLAVIPAAFIAPSQVLDGLLAVSVVIHTHWGVEAMVVDYMRPAVV 130

Query: 85  GVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
           G  L K+ H+ + I+S+ TL GL   I N  G+V G K+ W+IK K
Sbjct: 131 GNVLPKVAHIGLIIISVATLGGLFYFIQNDVGLVNGIKRFWSIKGK 176

Source: Drosophila ananassae

Species: Drosophila ananassae

Genus: Drosophila

Family: Drosophilidae

Order: Diptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

---

Prediction of Gene Ontology (GO) Terms

Close Homologs with Gene Ontology terms Detected by BLAST

Original result of BLAST against Gene Ontology (AMIGO)

ID	Length	Definition	Q cover	H cover	Identity	E-value
Query	130
FB|FBgn0039112	182	CG10219 [Drosophila melanogast	0.823	0.587	0.542	2.7e-29
UNIPROTKB|A8WT26	145	sdhd-1 "Putative succinate deh	0.953	0.855	0.338	9.5e-18
UNIPROTKB|Q6AZR3	152	sdhd-a "Succinate dehydrogenas	0.869	0.743	0.364	2.3e-16
WB|WBGene00009353	145	sdhd-1 [Caenorhabditis elegans	0.953	0.855	0.314	2.3e-16
UNIPROTKB|O62215	145	sdhd-1 "Putative succinate deh	0.953	0.855	0.314	2.3e-16
UNIPROTKB|Q6P355	152	sdhd "Succinate dehydrogenase	0.869	0.743	0.355	3.7e-16
UNIPROTKB|Q6AZV0	152	sdhd-b "Succinate dehydrogenas	0.869	0.743	0.347	1.6e-15
UNIPROTKB|Q5ZIS0	157	SDHD "Succinate dehydrogenase	0.792	0.656	0.370	8.8e-15
UNIPROTKB|F1NKK6	157	SDHD "Succinate dehydrogenase	0.792	0.656	0.370	1.1e-14
UNIPROTKB|Q95123	158	SDHD "Succinate dehydrogenase	0.869	0.715	0.372	1.4e-14

FB|FBgn0039112 CG10219 [Drosophila melanogaster (taxid:7227)]

 Score = 325 (119.5 bits), Expect = 2.7e-29, P = 2.7e-29
 Identities = 58/107 (54%), Positives = 78/107 (72%)

Query:    24 SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEV 83
             S HT LWT+ER +SAGLLAVIPAA++ PS  L+  + +S+V+H+HWG+EA+VVDY RP V
Sbjct:    71 SSHTLLWTVERIVSAGLLAVIPAAFIAPSQVLDALMAISVVIHTHWGVEAMVVDYMRPSV 130

Query:    84 VGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAIKSK 130
             VG  L K+ H+++ I+S+ TL GL   I N  G+  G K+ WAIK K
Sbjct:   131 VGNVLPKVAHIALIIISVATLGGLFYFIQNDVGLANGIKRFWAIKGK 177

GO:0008177 "succinate dehydrogenase (ubiquinone) activity" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0006099 "tricarboxylic acid cycle" evidence=ISS

GO:0016021 "integral to membrane" evidence=IEA

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0000104 "succinate dehydrogenase activity" evidence=ISS

UNIPROTKB|A8WT26 sdhd-1 "Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Caenorhabditis briggsae (taxid:6238)]

 Score = 216 (81.1 bits), Expect = 9.5e-18, P = 9.5e-18
 Identities = 43/127 (33%), Positives = 75/127 (59%)

Query:     2 SPSLVKHFSTTQVQHDAAVHSK-SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALV 60
             +P L      T   +D A  SK  DH+  + +ER  + G+L ++PA+Y +    ++  L 
Sbjct:    21 APRLSTIVRATSTLNDGA--SKVPDHSMHFKLERLWAVGMLPILPASYFIHGPVMDAVLT 78

Query:    61 VSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEG 120
             V++ +H HWGI  +V DYARP V+G A AK  H+ VY+++ + LAGL++   N  G+ + 
Sbjct:    79 VALTLHIHWGIHGVVYDYARPYVIGEAAAKAAHIGVYLITGLLLAGLLHFNTNDVGITKA 138

Query:   121 TKKLWAI 127
              + ++++
Sbjct:   139 FELVFSL 145

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

UNIPROTKB|Q6AZR3 sdhd-a "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit A, mitochondrial" [Xenopus laevis (taxid:8355)]

 Score = 203 (76.5 bits), Expect = 2.3e-16, P = 2.3e-16
 Identities = 43/118 (36%), Positives = 67/118 (56%)

Query:    11 TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
             T+Q+      H+ S   +L WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HW
Sbjct:    39 TSQIHTSQNHHAASKAASLHWTSERALSVALLGLLPAAYLYPGAAVDYSLAAALTLHGHW 98

Query:    70 GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             G+  +V DY    V G A  K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct:    99 GLGQVVTDY----VHGDAKIKLANTSLFALSALTFAGLCYFNYHDVGICKAVAMLWSL 152

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

WB|WBGene00009353 sdhd-1 [Caenorhabditis elegans (taxid:6239)]

 Score = 203 (76.5 bits), Expect = 2.3e-16, P = 2.3e-16
 Identities = 40/127 (31%), Positives = 73/127 (57%)

Query:     2 SPSLVKHFSTTQVQHDAAVHSK-SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALV 60
             +P +      T   +D A  SK  DH+  + +ER  + G+L ++PA+Y +    ++  L 
Sbjct:    21 APRISTIVRATSTLNDGA--SKVPDHSMHFKLERLWAVGMLPILPASYFIHGPVMDAVLT 78

Query:    61 VSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEG 120
             V++ +H HWGI  +V DYARP V+G A AK  H+ VY+++ + L  L++   N  G+ + 
Sbjct:    79 VALTLHIHWGIHGVVYDYARPYVIGEAAAKAAHVGVYLITGLLLGALLHFNTNDVGITKA 138

Query:   121 TKKLWAI 127
              + ++++
Sbjct:   139 FELVFSL 145

GO:0005506 "iron ion binding" evidence=IEA

GO:0005740 "mitochondrial envelope" evidence=IEA

GO:0006099 "tricarboxylic acid cycle" evidence=IEA

GO:0006121 "mitochondrial electron transport, succinate to ubiquinone" evidence=IEA

GO:0016021 "integral to membrane" evidence=IEA

GO:0020037 "heme binding" evidence=IEA

GO:0040010 "positive regulation of growth rate" evidence=IMP

GO:0009792 "embryo development ending in birth or egg hatching" evidence=IMP

GO:0040007 "growth" evidence=IMP

GO:0002119 "nematode larval development" evidence=IMP

UNIPROTKB|O62215 sdhd-1 "Putative succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Caenorhabditis elegans (taxid:6239)]

 Score = 203 (76.5 bits), Expect = 2.3e-16, P = 2.3e-16
 Identities = 40/127 (31%), Positives = 73/127 (57%)

Query:     2 SPSLVKHFSTTQVQHDAAVHSK-SDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALV 60
             +P +      T   +D A  SK  DH+  + +ER  + G+L ++PA+Y +    ++  L 
Sbjct:    21 APRISTIVRATSTLNDGA--SKVPDHSMHFKLERLWAVGMLPILPASYFIHGPVMDAVLT 78

Query:    61 VSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEG 120
             V++ +H HWGI  +V DYARP V+G A AK  H+ VY+++ + L  L++   N  G+ + 
Sbjct:    79 VALTLHIHWGIHGVVYDYARPYVIGEAAAKAAHVGVYLITGLLLGALLHFNTNDVGITKA 138

Query:   121 TKKLWAI 127
              + ++++
Sbjct:   139 FELVFSL 145

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

UNIPROTKB|Q6P355 sdhd "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Xenopus (Silurana) tropicalis (taxid:8364)]

 Score = 201 (75.8 bits), Expect = 3.7e-16, P = 3.7e-16
 Identities = 42/118 (35%), Positives = 67/118 (56%)

Query:    11 TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
             T+Q+      H+ S   ++ WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HW
Sbjct:    39 TSQIHTSPNHHAGSKAASMHWTSERALSVALLGLLPAAYLYPGAAMDYSLAAALTLHGHW 98

Query:    70 GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             G+  +V DY    V G A  K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct:    99 GLGQVVTDY----VHGDAKIKMANTSLFALSALTFAGLCYFNYHDVGICKAVSMLWSL 152

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

UNIPROTKB|Q6AZV0 sdhd-b "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit B, mitochondrial" [Xenopus laevis (taxid:8355)]

 Score = 195 (73.7 bits), Expect = 1.6e-15, P = 1.6e-15
 Identities = 41/118 (34%), Positives = 66/118 (55%)

Query:    11 TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
             T+Q+      H+ S   ++ WT ER LS  LL ++PAAYL P  A++Y+L  ++ +H HW
Sbjct:    39 TSQIHTSPNHHAGSKAASMHWTGERALSVALLGLLPAAYLYPGAAMDYSLAAALTLHGHW 98

Query:    70 GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             G+  +V DY    V G    K+ + S++ LS +T AGL     +  G+ +    LW++
Sbjct:    99 GLGQVVTDY----VHGETKIKMANTSLFALSALTFAGLCYFNYHDVGICKAVAMLWSL 152

GO:0005743 "mitochondrial inner membrane" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

UNIPROTKB|Q5ZIS0 SDHD "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Gallus gallus (taxid:9031)]

 Score = 188 (71.2 bits), Expect = 8.8e-15, P = 8.8e-15
 Identities = 40/108 (37%), Positives = 60/108 (55%)

Query:    21 HSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYA 79
             H  S   +L WT ER +SA LL ++PAAYL P  A++Y+L  ++ +H HWG+  ++ DY 
Sbjct:    54 HGSSKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDY- 112

Query:    80 RPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
                V G    K+ +  +Y+LS IT  GL        G+ +    LW+I
Sbjct:   113 ---VHGDTPIKVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 157

GO:0016021 "integral to membrane" evidence=IEA

GO:0022900 "electron transport chain" evidence=IEA

GO:0046872 "metal ion binding" evidence=IEA

GO:0006099 "tricarboxylic acid cycle" evidence=IEA

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0005743 "mitochondrial inner membrane" evidence=ISS

UNIPROTKB|F1NKK6 SDHD "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Gallus gallus (taxid:9031)]

 Score = 187 (70.9 bits), Expect = 1.1e-14, P = 1.1e-14
 Identities = 40/108 (37%), Positives = 60/108 (55%)

Query:    21 HSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYA 79
             H  S   +L WT ER +SA LL ++PAAYL P  A++Y+L  ++ +H HWG+  ++ DY 
Sbjct:    54 HGTSKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDY- 112

Query:    80 RPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
                V G    K+ +  +Y+LS IT  GL        G+ +    LW+I
Sbjct:   113 ---VHGDTPIKVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 157

GO:0005740 "mitochondrial envelope" evidence=IEA

GO:0016021 "integral to membrane" evidence=IEA

UNIPROTKB|Q95123 SDHD "Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial" [Bos taurus (taxid:9913)]

 Score = 186 (70.5 bits), Expect = 1.4e-14, P = 1.4e-14
 Identities = 44/118 (37%), Positives = 63/118 (53%)

Query:    11 TTQVQHDAAVHSKSDHTTL-WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHW 69
             T  +    + HS S   +L WT ER +S  LL +IPAAYL P  A++Y+L  ++ +HSHW
Sbjct:    45 TQHIHLSPSHHSGSKAASLHWTGERVVSVLLLGLIPAAYLNPCSAMDYSLAATLTLHSHW 104

Query:    70 GIEALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             GI  +V DY    V G A+ K     + +LS  T AGL     +  G+ +    LW +
Sbjct:   105 GIGQVVTDY----VHGDAVQKAAKTGLLVLSAFTFAGLCYFNYHDVGICKAVAMLWKL 158

GO:0005743 "mitochondrial inner membrane" evidence=ISS;TAS

GO:0005749 "mitochondrial respiratory chain complex II" evidence=ISS

GO:0020037 "heme binding" evidence=ISS

GO:0048039 "ubiquinone binding" evidence=ISS

GO:0046872 "metal ion binding" evidence=IEA

GO:0022900 "electron transport chain" evidence=IEA

GO:0016021 "integral to membrane" evidence=IEA

GO:0006099 "tricarboxylic acid cycle" evidence=IEA

---

Prediction of Enzyme Commission (EC) Number

EC Number Prediction by Annotation Transfer from SWISS-PROT Entries

Original result of BLAST against SWISS-PROT

ID	Name	Annotated EC number	Identity	Query coverage	Hit coverage	RBH(Q2H)	RBH(H2Q)
O14521	DHSD_HUMAN	No assigned EC number	0.3796	0.7923	0.6477	yes	N/A
Q95123	DHSD_BOVIN	No assigned EC number	0.3981	0.7923	0.6518	yes	N/A
A5GZW8	DHSD_PIG	No assigned EC number	0.375	0.8076	0.6603	yes	N/A
Q9CXV1	DHSD_MOUSE	No assigned EC number	0.3703	0.7923	0.6477	yes	N/A
Q6P355	DHSD_XENTR	No assigned EC number	0.3559	0.8692	0.7434	yes	N/A
O62215	DHSD_CAEEL	No assigned EC number	0.3300	0.7923	0.7103	yes	N/A
Q5RC29	DHSD_PONAB	No assigned EC number	0.3703	0.7923	0.6477	yes	N/A
Q5ZIS0	DHSD_CHICK	No assigned EC number	0.3703	0.7923	0.6560	yes	N/A
Q68FN7	DHSDB_DANRE	No assigned EC number	0.3188	0.9153	0.7531	yes	N/A
Q9VCI5	DHSD_DROME	No assigned EC number	0.5420	0.8230	0.5879	yes	N/A

EC Number Prediction by EFICAz Software

No EC number assignment, probably not an enzyme!

---

Conserved Domains and Related Protein Families

Conserved Domains Detected by RPS-BLAST

Original result of RPS-BLAST against CDD database

ID	Length	Definition	E-value
Query	130
cd03496	104	cd03496, SQR_TypeC_CybS, SQR catalyzes the oxidati	5e-27
pfam05328	107	pfam05328, CybS, CybS	2e-26

>gnl|CDD|239576 cd03496, SQR_TypeC_CybS, SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol

 Score = 95.8 bits (239), Expect = 5e-27
 Identities = 37/105 (35%), Positives = 58/105 (55%), Gaps = 3/105 (2%)

Query: 24  SDHTTLWTIERFLSAGLLAVIPAAYLVPSV--ALEYALVVSIVMHSHWGIEALVVDYARP 81
              +  WT ER L+  LL + PAA+  P +   ++ AL  ++++HSHWG E+ ++DY   
Sbjct: 1   LHGSYHWTFERILAVSLLPLTPAAFFAPGLSPVMDAALAAALLLHSHWGFESCIIDYVPK 60

Query: 82  EVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWA 126
            V G  L K+    +Y  S ++LAGL     N  G+ +  KKLW+
Sbjct: 61  RVGG-KLHKLAMYLLYAGSALSLAGLYYFNTNDVGLTKAVKKLWS 104

Eukaryotic SQRs reduce high potential quinones such as ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. CybS and CybL are the two transmembrane proteins of eukaryotic SQRs. They contain heme and quinone binding sites. CybS is the eukaryotic homolog of the bacterial SdhD subunit. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the transmembrane subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of quinone is an essential feature of respiration, allowing transfer of electrons between respiratory complexes. Mutations in human Complex II result in various physiological disorders including hereditary paraganglioma and pheochromocytoma tumors. The gene encoding for the SdhD subunit is classified as a tumor suppressor gene. Length = 104

>gnl|CDD|218557 pfam05328, CybS, CybS

 Score = 94.2 bits (235), Expect = 2e-26
 Identities = 38/107 (35%), Positives = 60/107 (56%), Gaps = 3/107 (2%)

Query: 22  SKSDHTTLWTIERFLSAGLLAVIPAAYL--VPSVALEYALVVSIVMHSHWGIEALVVDYA 79
           +KS  +  WT ER L+ GLL + PA +L   PS  ++  L  ++++H HWG ++ ++DY 
Sbjct: 2   NKSHGSYHWTFERILAVGLLPLTPAPFLAGSPSPVMDATLAAALLLHCHWGFQSCIIDYI 61

Query: 80  RPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWA 126
              V G  L K+    +Y+ + +TL GL     N  G+ E  KKLW+
Sbjct: 62  PKRVYG-KLHKLAMYLLYLGTALTLYGLYYFETNDVGLTEAVKKLWS 107

This family consists of several eukaryotic succinate dehydrogenase [ubiquinone] cytochrome B small subunit, mitochondrial precursor (CybS) proteins. SDHD encodes the small subunit (cybS) of cytochrome b in succinate-ubiquinone oxidoreductase (mitochondrial complex II). Mitochondrial complex II is involved in the Krebs cycle and in the aerobic electron transport chain. It contains four proteins. The catalytic core consists of a flavoprotein and an iron-sulfur protein; these proteins are anchored to the mitochondrial inner membrane by the large subunit of cytochrome b (cybL) and cybS, which together comprise the heme-protein cytochrome b. Mutations in the SDHD gene can lead to hereditary paraganglioma, characterized by the development of benign, vascularised tumours in the head and neck. Length = 107

Conserved Domains Detected by HHsearch

Original result of HHsearch against CDD database

ID	Length	Definition	Probability
Query	130
KOG4097|consensus	178		100.0
PF05328	132	CybS: CybS; InterPro: IPR007992 This family consis	100.0
cd03496	104	SQR_TypeC_CybS SQR catalyzes the oxidation of succ	100.0
PRK09488	115	sdhD succinate dehydrogenase cytochrome b556 small	99.36
cd03495	100	SQR_TypeC_SdhD_like Succinate:quinone oxidoreducta	99.35
COG2142	117	SdhD Succinate dehydrogenase, hydrophobic anchor s	99.14
TIGR02968	105	succ_dehyd_anc succinate dehydrogenase, hydrophobi	99.1
cd03494	99	SQR_TypeC_SdhD Succinate:quinone oxidoreductase (S	98.98
cd03500	106	SQR_TypeA_SdhD_like Succinate:quinone oxidoreducta	98.68
cd03493	98	SQR_QFR_TM Succinate:quinone oxidoreductase (SQR)	98.15
PF01127	121	Sdh_cyt: Succinate dehydrogenase/Fumarate reductas	97.2
cd03501	101	SQR_TypeA_SdhC_like Succinate:quinone oxidoreducta	97.16
cd03499	117	SQR_TypeC_SdhC Succinate:quinone oxidoreductase (S	90.59
TIGR02970	120	succ_dehyd_cytB succinate dehydrogenase, cytochrom	85.95

>KOG4097|consensus

Probab=100.00  E-value=3.9e-45  Score=283.63  Aligned_cols=106  Identities=44%  Similarity=0.834  Sum_probs=103.3

Q ss_pred             CCCcchhHHHHHHHHHHHHHHHHhhhCc---hHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHHHHHHHHHHHH
Q psy10707         24 SDHTTLWTIERFLSAGLLAVIPAAYLVP---SVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILS  100 (130)
Q Consensus        24 ~~gs~hW~~ERi~s~aLlpL~~~~~~~p---~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k~a~~~l~~~S  100 (130)
                      .+|||||++||++|++|+||+|++++++   ||+||++|++++++|+|||||+||+||+|+|+|| ++||+|+++|+++|
T Consensus        65 ~~~Syhw~~ERi~s~~llpl~paa~~~~~p~s~~mDa~La~~l~~h~hwGf~scViDYi~~~v~g-~~~k~A~~~L~~~S  143 (178)
T KOG4097|consen   65 LAGSYHWTVERIVSVGLLPLLPAAYLTTGPISPAMDASLAVALLLHCHWGFESCVIDYIRPRVYG-VLHKLAHYGLYLGS  143 (178)
T ss_pred             cccchhhhHHHHHHHHHHHhhhHHHhcCCCCcHHHHHHHHHHHHHHhhcccceEEEeeeCcchhc-hhHHHHHHHHHHHH
Confidence            5899999999999999999999999984   7899999999999999999999999999999999 99999999999999


Q ss_pred             HHHHhhheeEeecCCchHHHHHhhccccCC
Q psy10707        101 IITLAGLMNLILNGGGVVEGTKKLWAIKSK  130 (130)
Q Consensus       101 ~~tl~GLy~f~t~dvGi~~~vk~lW~~~~~  130 (130)
                      .++++|+|+|||||+|++++||++|+.|+|
T Consensus       144 ~Lsl~Gly~f~tndvGl~~~vk~lW~~~~~  173 (178)
T KOG4097|consen  144 VLSLGGLYEFETNDVGLVKGVKKLWDSKGK  173 (178)
T ss_pred             HHhhhheeEEeecchHHHHHHHHHHccCcc
Confidence            999999999999999999999999999976

>PF05328 CybS: CybS; InterPro: IPR007992 This family consists of several eukaryotic succinate dehydrogenase [ubiquinone] cytochrome B small subunit, mitochondrial precursor (CybS) proteins

Probab=100.00  E-value=1.5e-44  Score=269.74  Aligned_cols=104  Identities=40%  Similarity=0.677  Sum_probs=95.6

Q ss_pred             cCCCCcchhHHHHHHHHHHHHHHHHhhhC--chHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHHHHHHHHHHH
Q psy10707         22 SKSDHTTLWTIERFLSAGLLAVIPAAYLV--PSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYIL   99 (130)
Q Consensus        22 ~~~~gs~hW~~ERi~s~aLlpL~~~~~~~--p~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k~a~~~l~~~   99 (130)
                      ++.|||+||++||++|++|+||+|++++.  +|+++|++|++++++|+|||||+||+||+|+|+|| +++|+|+++++++
T Consensus        27 ~~~~gs~hW~~ER~~a~~Llpl~~~~~~~gs~~~~~D~~La~~l~~H~h~G~~svI~DYip~~v~~-~~~~~a~~~l~~~  105 (132)
T PF05328_consen   27 SKSHGSYHWKFERIVAAALLPLIPAAFASGSPNPVMDYLLAVALPLHSHIGFESVITDYIPKRVFG-KLHKLAMWLLYAG  105 (132)
T ss_dssp             -TTHHHHHHHHHHHHHHHHHHHHHHHHHS---SHHHHHHHHHHHHHHHHHHHHHHHHHHS-----S-HHHHHHHHHHHHH
T ss_pred             CCCCcceeeHHHHHHHHHHHHHHHHHHHhcCCcHHHHHHHHHHHHHHHHHhhhhhhhhhccccccc-hHHHHHHHHHHHH
Confidence            67799999999999999999999999999  79999999999999999999999999999999999 9999999999999


Q ss_pred             HHHHHhhheeEeecCCchHHHHHhhcc
Q psy10707        100 SIITLAGLMNLILNGGGVVEGTKKLWA  126 (130)
Q Consensus       100 S~~tl~GLy~f~t~dvGi~~~vk~lW~  126 (130)
                      |+++++|||+||+||+||+++||++|+
T Consensus       106 s~~~l~Gl~~~~~~d~Gi~~~vk~lW~  132 (132)
T PF05328_consen  106 SALTLAGLYYFNTNDVGITEAVKKLWK  132 (132)
T ss_dssp             HHHHHHHHHHHHHHSSHHHHHHHHHCT
T ss_pred             HHHHHHHheEEEecCccHHHHHHHHhC
Confidence            999999999999999999999999996

SDHD encodes the small subunit (cybS) of cytochrome b in succinate-ubiquinone oxidoreductase (mitochondrial complex II). Mitochondrial complex II is involved in the Krebs cycle and in the aerobic electron transport chain. It contains four proteins. The catalytic core consists of a flavoprotein and an iron-sulphur protein; these proteins are anchored to the mitochondrial inner membrane by the large subunit of cytochrome b (cybL) and cybS, which together comprise the haem-protein cytochrome b. Mutations in the SDHD gene can lead to hereditary paraganglioma, characterised by the development of benign, vascularised tumours in the head and neck [].; GO: 0005506 iron ion binding, 0020037 heme binding, 0006099 tricarboxylic acid cycle, 0005740 mitochondrial envelope, 0016021 integral to membrane; PDB: 3AE7_D 3AEB_D 3AEC_D 3AE6_D 3AE4_D 3AE3_D 3AEG_D 3SFD_D 3AE9_D 1ZOY_D ....

>cd03496 SQR_TypeC_CybS SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol

Probab=100.00  E-value=2.2e-41  Score=243.80  Aligned_cols=102  Identities=37%  Similarity=0.684  Sum_probs=98.6

Q ss_pred             CCCcchhHHHHHHHHHHHHHHHHhhhCc--hHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHHHHHHHHHHHHH
Q psy10707         24 SDHTTLWTIERFLSAGLLAVIPAAYLVP--SVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSI  101 (130)
Q Consensus        24 ~~gs~hW~~ERi~s~aLlpL~~~~~~~p--~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k~a~~~l~~~S~  101 (130)
                      .+||+||+.||++|++|+||+|++++.+  +|++|.+++++++.|+|+|||+||+||+||| +|+.+++++++++.++|+
T Consensus         1 ~~Gs~Hw~~eR~~avaLlpL~~~~~~~~~~~pil~~ll~~~~~~H~~~G~q~vIeDYv~~~-~~~~~~~~a~~~~~~~s~   79 (104)
T cd03496           1 LHGSYHWTFERILAVSLLPLTPAAFFAPGLSPVMDAALAAALLLHSHWGFESCIIDYVPKR-VGGKLHKLAMYLLYAGSA   79 (104)
T ss_pred             CCchhHHHHHHHHHHHHHHHHHHHHHHhcccHHHHHHHHHHHHHHHHhcceeeeeecCCCc-ccchHHHHHHHHHHHHHH
Confidence            3799999999999999999999999988  9999999999999999999999999999999 456999999999999999


Q ss_pred             HHHhhheeEeecCCchHHHHHhhcc
Q psy10707        102 ITLAGLMNLILNGGGVVEGTKKLWA  126 (130)
Q Consensus       102 ~tl~GLy~f~t~dvGi~~~vk~lW~  126 (130)
                      ++++||||||+||+|++++||++|+
T Consensus        80 ~~l~Gl~~~~~~d~Gi~~~v~~lW~  104 (104)
T cd03496          80 LSLAGLYYFNTNDVGLTKAVKKLWS  104 (104)
T ss_pred             HHHHHheeeeecCccHHHHHHHHhC
Confidence            9999999999999999999999996

Eukaryotic SQRs reduce high potential quinones such as ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. CybS and CybL are the two transmembrane proteins of eukaryotic SQRs. They contain heme and quinone binding sites. CybS is the eukaryotic homolog of the bacterial SdhD subunit. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the transmembrane subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of

>PRK09488 sdhD succinate dehydrogenase cytochrome b556 small membrane subunit; Provisional

Probab=99.36  E-value=3.4e-12  Score=93.60  Aligned_cols=61  Identities=16%  Similarity=0.196  Sum_probs=53.1

Q ss_pred             cCCCCcchhHHHHHHHHHHHHHHHHhh------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCCc
Q psy10707         22 SKSDHTTLWTIERFLSAGLLAVIPAAY------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARPE   82 (130)
Q Consensus        22 ~~~~gs~hW~~ERi~s~aLlpL~~~~~------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~   82 (130)
                      .+.+|.+||+.||++|++|+|++++.+                  ..| +.++..++.++...|...|+|.+|+||+++.
T Consensus         8 ~~~~G~~~w~~QRvTAv~l~~l~~~~v~~~~~~~g~~y~~~~~~f~~p~~ai~~ll~l~~~~~H~~iGmq~VieDYV~~~   87 (115)
T PRK09488          8 LGRNGVHDFILVRATAIVLTLYIIYMVGFFATSGELTYEVWRGFFASAFTKVFTLLALFSILIHAWIGMWQVLTDYVKPL   87 (115)
T ss_pred             cCcCcHHHHHHHHHHHHHHHHHHHHHHHHHHHcCCCCHHHHHHHHcChHHHHHHHHHHHHHHHHHHHcchHHHHHccCch
Confidence            466899999999999999999999876                  123 5778888889999999999999999999953

>cd03495 SQR_TypeC_SdhD_like Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit-like; composed of predominantly uncharacterized bacterial proteins with similarity to the E

Probab=99.35  E-value=3.1e-12  Score=91.15  Aligned_cols=73  Identities=21%  Similarity=0.341  Sum_probs=60.6

Q ss_pred             chhHHHHHHHHHHHHHHHHhh------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhH
Q psy10707         28 TLWTIERFLSAGLLAVIPAAY------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVAL   88 (130)
Q Consensus        28 ~hW~~ERi~s~aLlpL~~~~~------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~   88 (130)
                      .||+.||+++++|+|++++.+                  ..| +.++|.++..+...|...|+|.+++||+++    +.+
T Consensus         1 ~~W~~qRvTav~L~~l~~~~v~~~~~~~~~~y~~~~~~~~~p~~~i~~~l~l~~~~~H~~~Gm~~IieDYV~~----~~~   76 (100)
T cd03495           1 HHWWAQRVTAVALVPLVLWFVFSVALLLGASYAEVVAWLAHPFNAILLILTLVSAFYHARLGMQVVIEDYVHS----EGL   76 (100)
T ss_pred             CcHHHHHHHHHHHHHHHHHHHHHHHHhCCCCHHHHHHHHhChHHHHHHHHHHHHHHHHHHHHHHHHHHHHhCc----hHH
Confidence            499999999999999999766                  223 678999999999999999999999999995    356


Q ss_pred             HHHHHHHHHHHHHHHH
Q psy10707         89 AKIFHLSVYILSIITL  104 (130)
Q Consensus        89 ~k~a~~~l~~~S~~tl  104 (130)
                      +.....+....+.++.
T Consensus        77 R~~l~~~~~~~~~~~~   92 (100)
T cd03495          77 RLALIIAVKLFAIATA   92 (100)
T ss_pred             HHHHHHHHHHHHHHHH
Confidence            7777777666665544

coli SdhD subunit. One characterized protein is the respiratory Complex II SdhD subunit of the only eukaryotic member, Reclinomonas americana. SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. It is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. E. coli SQR is classified as Type C SQRs because it contains two transmembrane subunits and one heme group. The SdhD and SdhC subunits are membrane anchor subunits containing heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is

>COG2142 SdhD Succinate dehydrogenase, hydrophobic anchor subunit [Energy production and conversion]

Probab=99.14  E-value=1.3e-10  Score=85.68  Aligned_cols=72  Identities=18%  Similarity=0.337  Sum_probs=58.4

Q ss_pred             CCCcchhHHHHHHHHHHHHHHHHhh------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCCcch
Q psy10707         24 SDHTTLWTIERFLSAGLLAVIPAAY------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARPEVV   84 (130)
Q Consensus        24 ~~gs~hW~~ERi~s~aLlpL~~~~~------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~   84 (130)
                      .+|++||.+||++++.|+|++.+-+                  ..| +.++|.++..+..+|...|++.||+||++++  
T Consensus        11 r~G~~~~l~qRvTav~Lv~l~~~~l~~~l~~~~~~y~~~~~~~s~p~~~v~~lL~l~~~l~H~~~Glr~Ii~DYi~~~--   88 (117)
T COG2142          11 RYGSHDWLLQRVTAVILVLLVIWHLYFLLTWLNATYAAWVAFLANPFWKVFLLLLLVAALIHAWNGLRVIIEDYIKPE--   88 (117)
T ss_pred             ccchHHHHHHHHHHHHHHHHHHHHHHHHHHcCCCCHHHHHHHHhCHHHHHHHHHHHHHHHHHHHhhhHHHHHHHHhhH--
Confidence            3899999999999999999998877                  223 5789999999999999999999999999976  


Q ss_pred             hhhHHHHHHHHHHHH
Q psy10707         85 GVALAKIFHLSVYIL   99 (130)
Q Consensus        85 gp~~~k~a~~~l~~~   99 (130)
                        +.++....++...
T Consensus        89 --~~r~~l~~~~~~~  101 (117)
T COG2142          89 --KLRLALQILLVLA  101 (117)
T ss_pred             --HHHHHHHHHHHHH
Confidence              3444444444333

>TIGR02968 succ_dehyd_anc succinate dehydrogenase, hydrophobic membrane anchor protein

Probab=99.10  E-value=3.4e-10  Score=80.47  Aligned_cols=74  Identities=14%  Similarity=0.290  Sum_probs=58.9

Q ss_pred             CCCcchhHHHHHHHHHHHHHHHHhhh------------------Cc-hHHHHHHHHHHHHHHHHhhccceeeeccCCcch
Q psy10707         24 SDHTTLWTIERFLSAGLLAVIPAAYL------------------VP-SVALEYALVVSIVMHSHWGIEALVVDYARPEVV   84 (130)
Q Consensus        24 ~~gs~hW~~ERi~s~aLlpL~~~~~~------------------~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~   84 (130)
                      .+|.+||..||+++++|+|++++.+.                  .| +.+++.++..+...|...|++.+++||++.   
T Consensus         2 ~~G~~~w~~~RiSgv~L~~l~~~~~~~~~~~~~~~y~~~~~~~~~~~~~i~~~l~~~~~~~H~~~Glr~ii~Dy~~~---   78 (105)
T TIGR02968         2 RSGLRDWLLQRVTAVVLALYTIFLIGFLLALPGLTYEAWRALFAHPWMKIFTLLALLALLYHAWIGMRVVLEDYVKP---   78 (105)
T ss_pred             CchHHHHHHHHHHHHHHHHHHHHHHHHHHHcCCCCHHHHHHHHhChHHHHHHHHHHHHHHHHHHHhHHHHHHHHccc---
Confidence            47899999999999999999997661                  12 477889999999999999999999999974   


Q ss_pred             hhhHHHHHHHHHHHHHH
Q psy10707         85 GVALAKIFHLSVYILSI  101 (130)
Q Consensus        85 gp~~~k~a~~~l~~~S~  101 (130)
                       ...+..+..++.....
T Consensus        79 -~~~r~~l~~~~~~~~~   94 (105)
T TIGR02968        79 -EGLRLVLQVLIILFLV   94 (105)
T ss_pred             -hHHHHHHHHHHHHHHH
Confidence             3555565555544443

In E. coli and many other bacteria, two small, hydrophobic, mutually homologous subunits of succinate dehydrogenase, a TCA cycle enzyme, are SdhC and SdhD. This family is the SdhD, the hydrophobic membrane anchor protein. SdhC is apocytochrome b558, which also plays a role in anchoring the complex.

>cd03494 SQR_TypeC_SdhD Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol

Probab=98.98  E-value=1.6e-09  Score=77.14  Aligned_cols=54  Identities=13%  Similarity=0.276  Sum_probs=46.9

Q ss_pred             hhHHHHHHHHHHHHHHHHhh------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCCc
Q psy10707         29 LWTIERFLSAGLLAVIPAAY------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARPE   82 (130)
Q Consensus        29 hW~~ERi~s~aLlpL~~~~~------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~   82 (130)
                      ||+.||+++++|+|++|+.+                  ..| +.++..++..+...|...|++.+++||+++.
T Consensus         1 ~w~~qRiSav~L~~l~~~~v~~~~~~~~~~y~~~~~~~~~p~~~i~~~l~~~~~~~H~~~Glr~vi~DYv~~~   73 (99)
T cd03494           1 DWLVQRVTAVIMALYTIFLVGFLLASPPLTYEAWSGLFSSLWMKIFTLLALLALLLHAWIGLWDILTDYVKPA   73 (99)
T ss_pred             CHHHHHHHHHHHHHHHHHHHHHHHHcCCCCHHHHHHHHhCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHcCcH
Confidence            89999999999999999765                  123 5678888899999999999999999999853

E. coli SQR, a member of this subfamily, reduces the high potential quinine, ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. SdhD and SdhC are the two transmembrane proteins of bacterial SQRs. They contain heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the membrane anchor subunits via electron transport through FAD an

>cd03500 SQR_TypeA_SdhD_like Succinate:quinone oxidoreductase (SQR) Type A subfamily, Succinate dehydrogenase D (SdhD)-like subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol

Probab=98.68  E-value=8.1e-08  Score=67.91  Aligned_cols=79  Identities=18%  Similarity=0.390  Sum_probs=59.7

Q ss_pred             CcchhHHHHHHHHHHHHHHHHhhh--------C-------------c-hHHHHHHHHHHHHHHHHhhccceeeeccCCcc
Q psy10707         26 HTTLWTIERFLSAGLLAVIPAAYL--------V-------------P-SVALEYALVVSIVMHSHWGIEALVVDYARPEV   83 (130)
Q Consensus        26 gs~hW~~ERi~s~aLlpL~~~~~~--------~-------------p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~   83 (130)
                      ++..|..||++++.|+|++++-+.        .             | +.+++.++..+...|...|++.+++||+++  
T Consensus         1 ~~~~w~~qRiTgv~L~~~l~~hi~~~~~~~~~~~~~~~~~~~~~~~p~~~i~~~lll~~~~~H~~~Glr~il~Dy~~~--   78 (106)
T cd03500           1 ESLAWLFQRITGVFLVFLLAGHFWVQHMDNGGDVIDFAFVANRLASPLWKVWDLLLLVLALLHGGNGLRNILLDYVRR--   78 (106)
T ss_pred             CHHHHHHHHHHHHHHHHHHHHHHHHHHHhccCCccCHHHHHHHHcChHHHHHHHHHHHHHHHHHHHhHHHHHHHHccC--
Confidence            356899999999999999997663        1             1 347888999999999999999999999985  


Q ss_pred             hhhhHHHHHHHHHHHHHHH-HHhhhe
Q psy10707         84 VGVALAKIFHLSVYILSII-TLAGLM  108 (130)
Q Consensus        84 ~gp~~~k~a~~~l~~~S~~-tl~GLy  108 (130)
                        +..++.++....+.+++ .+.|++
T Consensus        79 --~~~r~~~~~~~~~~~~~~~~~g~~  102 (106)
T cd03500          79 --PRLRRAVKGLLYVAGLLLIVLGTY  102 (106)
T ss_pred             --chHHHHHHHHHHHHHHHHHHHHHH
Confidence              34556666665554444 334443

Members of this subfamily reduce low potential quinones such as menaquinone and thermoplasmaquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are similar to the Thermoplasma acidophilum SQR and are classified as Type A because they contain two transmembrane subunits as well as two heme groups. Although there are no structures available for this subfamily, the presence of two hemes has been proven spectroscopically for T. acidophilum. The two membrane anchor subunits are similar to the SdhD and SdhC subunits of bacterial

>cd03493 SQR_QFR_TM Succinate:quinone oxidoreductase (SQR) and Quinol:fumarate reductase (QFR) family, transmembrane subunits; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol, while QFR catalyzes the reverse reaction

Probab=98.15  E-value=6.8e-06  Score=54.90  Aligned_cols=74  Identities=27%  Similarity=0.408  Sum_probs=58.5

Q ss_pred             HHHHHHHHHHHHHHHhhhC--------------------c-hHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHH
Q psy10707         32 IERFLSAGLLAVIPAAYLV--------------------P-SVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAK   90 (130)
Q Consensus        32 ~ERi~s~aLlpL~~~~~~~--------------------p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k   90 (130)
                      .||++++.|++++++.+..                    | ..+++.++..+..+|...|++.++.||.+..  .++..+
T Consensus         2 ~~Ritgv~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~H~~~Gir~i~~D~~~~~--~~~~~~   79 (98)
T cd03493           2 LHRITGVALLLFLPLHLLGLLALLGGPYAFAEVVAFLSSPLGKLLYLLLLLALLYHALNGIRHLIWDYGKGL--ELKLRK   79 (98)
T ss_pred             eehhhHHHHHHHHHHHHHHHHHHhcCHHHHHHHHHHHhCHHHHHHHHHHHHHHHHHHHHhHHHHHHHccccC--CHHHHH
Confidence            5899999999998876521                    2 4779999999999999999999999999864  345666


Q ss_pred             HHHHHHHHHHHHHHhhh
Q psy10707         91 IFHLSVYILSIITLAGL  107 (130)
Q Consensus        91 ~a~~~l~~~S~~tl~GL  107 (130)
                      ...+...+.+++....+
T Consensus        80 ~~~~~~~~~~~~~~~~~   96 (98)
T cd03493          80 ALGYAVLALSVLLTVLL   96 (98)
T ss_pred             HHHHHHHHHHHHHHHHH
Confidence            77777777777665543

SQR, also called succinate dehydrogenase or Complex II, is part of the citric acid cycle and the aerobic respiratory chain, while QFR is involved in anaerobic respiration with fumarate as the terminal electron acceptor. SQRs may reduce either high or low potential quinones while QFRs oxidize only low potential quinols. SQR and QFR share a common subunit arrangement, composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. The structural arrangement allows efficient electron transfer between the catalytic subunit, through iron-sulfur centers, and the transmembrane subunit(s) containing the electron donor/acceptor (quinol or quinone). The reversible reduction of

>PF01127 Sdh_cyt: Succinate dehydrogenase/Fumarate reductase transmembrane subunit; InterPro: IPR000701 This entry includes the transmembrane subunit from both succinate dehydrogenase and fumarate reductase complexes

Probab=97.20  E-value=0.0016  Score=45.90  Aligned_cols=55  Identities=24%  Similarity=0.384  Sum_probs=41.5

Q ss_pred             CCCcchhHHHHHHHHHHHH-HHHHhh-----h----------------Cc-hHHHHHHHHHHHHHHHHhhccceeeec
Q psy10707         24 SDHTTLWTIERFLSAGLLA-VIPAAY-----L----------------VP-SVALEYALVVSIVMHSHWGIEALVVDY   78 (130)
Q Consensus        24 ~~gs~hW~~ERi~s~aLlp-L~~~~~-----~----------------~p-~~v~D~~La~~l~~H~h~G~~svI~DY   78 (130)
                      ..++.+|..+|++++.|++ ......     .                .| ..+...++..+..+|...|++.+++|+
T Consensus        17 ~~~~~~~~~qRiTgi~L~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~H~~~Gir~il~D~   94 (121)
T PF01127_consen   17 HSGTWAWILQRITGIILLLLFLHLHIWFLLSALGGGPISYDEVVAFFSSPFWAILYFLLLVAFFFHALNGIRHILEDW   94 (121)
T ss_dssp             -HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCSSHHHHHHHHHHHHSHHHHHHHHHHHHHHHHHHHHHHHHHHHHT
T ss_pred             CcchHHHHHHHHHHHHHHHHHHHHHHHHHhhhhcCCHhhHHHHHHHhCCHHHHHHHHHHHHHHHHHHHhhHHHHHHHh
Confidence            4788999999999999999 333221     0                11 234557777888889999999999996

Fumarate reductase couples the reduction of fumarate to succinate to the oxidation of quinol to quinone, in a reaction opposite to that catalysed by the related complex II of the respiratory chain (succinate dehydrogenase) []. Three protein subunits contain the fumarate reductase complex. Subunit A contains the site of fumarate reduction and a covalently bound flavin adenine dinucleotide prosthetic group. Subunit B contains three iron-sulphur centres. The menaquinol-oxidizing subunit C consists of five membrane-spanning, primarily helical segments and binds two haem b molecules []. Succinate dehydrogenase (SDH) is a membrane-bound complex of two main components: a membrane-extrinsic component composed of an FAD-binding flavoprotein and an iron-sulphur protein, and a hydrophobic component composed of a cytochrome b and a membrane anchor protein. The cytochrome b component is a mono-haem transmembrane protein [, , ] belonging to a family that includes: Cytochrome b-556 from bacterial SDH (gene sdhC). Cytochrome b560 from the mammalian mitochondrial SDH complex, which is encoded in the mitochondrial genome of some algae and in the plant Marchantia polymorpha. Cytochrome b from yeast mitochondrial SDH complex (gene SDH3 or CYB3). Protein cyt-1 from Caenorhabditis elegans. These cytochromes are proteins of about 130 residues that comprise three transmembrane regions. There are two conserved histidines which may be involved in binding the haem group.; GO: 0016627 oxidoreductase activity, acting on the CH-CH group of donors; PDB: 2WDQ_H 1NEN_D 2WP9_L 2WDV_H 2ACZ_D 2WS3_L 2WU2_H 2WDR_D 2WU5_H 1NEK_D ....

>cd03501 SQR_TypeA_SdhC_like Succinate:quinone oxidoreductase (SQR) Type A subfamily, Succinate dehydrogenase C (SdhC)-like subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol

Probab=97.16  E-value=0.002  Score=44.85  Aligned_cols=54  Identities=24%  Similarity=0.399  Sum_probs=44.0

Q ss_pred             hhHHHHHHHHHHHHHHHHhh--------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCCc
Q psy10707         29 LWTIERFLSAGLLAVIPAAY--------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARPE   82 (130)
Q Consensus        29 hW~~ERi~s~aLlpL~~~~~--------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~   82 (130)
                      -|..+|++.+.++..++.-+                    ..| ..+++.++..++.+|.-.|++.++.||....
T Consensus         3 ~~~lhRitGi~L~~fl~~hl~~~~~~~~~~~~y~~~~~~~~~p~~~~~~~l~~~~~~~H~~~Gir~~~~d~g~~~   77 (101)
T cd03501           3 AWVLHRITGVVILFYLFLHVLDLSSLRRGPETYNAVIATYKSPIFKLGEFGLVAAVVFHALNGIRLILVDFGSGG   77 (101)
T ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHhcCHHHHHHHHHHHHChHHHHHHHHHHHHHHHHHHHhHHHHHHHhcccc
Confidence            48999999999998877543                    112 3567899999999999999999999998754

Members of this subfamily reduce low potential quinones such as menaquinone and thermoplasmaquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are similar to the Thermoplasma acidophilum SQR and are classified as Type A because they contain two transmembrane subunits as well as two heme groups. Although there are no structures available for this subfamily, the presence of two hemes has been proven spectroscopically for T. acidophilum. The two membrane anchor subunits are similar to the SdhD and SdhC subunits of bacteria

>cd03499 SQR_TypeC_SdhC Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase C (SdhC) subunit; composed of bacterial SdhC and eukaryotic large cytochrome b binding (CybL) proteins

Probab=90.59  E-value=1.8  Score=30.76  Aligned_cols=75  Identities=19%  Similarity=0.258  Sum_probs=50.3

Q ss_pred             cchhHHHHHHHHHHHHHHHHhhh-------Cc--------------hHHHHHHHHHHHHHHHHhhccceeeeccCCcchh
Q psy10707         27 TTLWTIERFLSAGLLAVIPAAYL-------VP--------------SVALEYALVVSIVMHSHWGIEALVVDYARPEVVG   85 (130)
Q Consensus        27 s~hW~~ERi~s~aLlpL~~~~~~-------~p--------------~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~g   85 (130)
                      +.-+.++|++.+.|.-.++....       .|              ..++...+..++.+|.--|+..++.||....  .
T Consensus        16 ~~~Si~hRiSGv~L~~~~~~~~~~~~~~~~~~~~y~~~~~~~~~~~~~~~~~~~~~~~~yH~~nGiRhll~D~g~~~--~   93 (117)
T cd03499          16 AILSILHRITGVALFLGLPLLLWWLLASLSSPESFESVSALLGSWLGKLVLFGLTWALFYHLLNGIRHLIWDLGKGL--E   93 (117)
T ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHHHhcCHHHHHHHHHHHhhHHHHHHHHHHHHHHHHHHHhhHHHHHHHccccC--c
Confidence            34567899999888665554431       11              2457888899999999999999999998754  3


Q ss_pred             hhHHHHHHHHHHHHHHHH
Q psy10707         86 VALAKIFHLSVYILSIIT  103 (130)
Q Consensus        86 p~~~k~a~~~l~~~S~~t  103 (130)
                      ++-.+..-+...+++++.
T Consensus        94 ~~~~~~~~~~~~~~~~~~  111 (117)
T cd03499          94 LKTVYKSGYAVLVLSVVL  111 (117)
T ss_pred             HHHHHHHHHHHHHHHHHH
Confidence            333444444444444443

SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. Members of this family reduce high potential quinones such as ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Proteins in this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. The heme and quinone binding sites reside in the transmembrane subunits. The SdhC or CybL protein is one of the two transmembrane subunits of bacterial and eukaryotic SQRs. The two-electron oxidation of succinate in the flavoprotein a

>TIGR02970 succ_dehyd_cytB succinate dehydrogenase, cytochrome b556 subunit

Probab=85.95  E-value=5.3  Score=28.78  Aligned_cols=54  Identities=20%  Similarity=0.268  Sum_probs=40.4

Q ss_pred             CcchhHHHHHHHHHHHHHHHHhh---h----Cc--------------hHHHHHHHHHHHHHHHHhhccceeeecc
Q psy10707         26 HTTLWTIERFLSAGLLAVIPAAY---L----VP--------------SVALEYALVVSIVMHSHWGIEALVVDYA   79 (130)
Q Consensus        26 gs~hW~~ERi~s~aLlpL~~~~~---~----~p--------------~~v~D~~La~~l~~H~h~G~~svI~DYv   79 (130)
                      .+.-|..+|++.+.|.-.+++-+   .    .|              ..+++..+..++.+|.--|+..++.|.-
T Consensus        17 ~~~~silhRiTGv~l~~~~~~~~~~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~yH~~nGiRhl~~D~g   91 (120)
T TIGR02970        17 TAILSILHRITGVLLFFGLPFLLWWLSLSLSSPESFATVHALLSSPLGKLILWGLLWALLYHLLAGIRHLLWDLG   91 (120)
T ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHHHHhcCHHHHHHHHHHHhCHHHHHHHHHHHHHHHHHHHHhHHHHHHHcc
Confidence            45578999999999855433221   1    11              3567788899999999999999999984

In E. coli and many other bacteria, two small, hydrophobic, mutually homologous subunits of succinate dehydrogenase, a TCA cycle enzyme, are SdhC and SdhD. This family is the SdhC, the cytochrome b subunit, called b556 in bacteria and b560 in mitochondria. SdhD (see TIGR02968) is called the hydrophobic membrane anchor subunit, although both SdhC and SdhD participate in anchoring the complex. In some bacteria, this cytochrome b subunit is replaced my a member of the cytochrome b558 family (see TIGR02046).

---

Homologous Structure Templates

Structure Templates Detected by BLAST

Original result of BLAST against Protein Data Bank

ID	Length	Definition	E-value
Query	130
3vr8_D	156	Mitochondrial Rhodoquinol-Fumarate Reductase From T		6e-14
1zoy_D	103	Crystal Structure Of Mitochondrial Respiratory Comp		1e-11
1yq3_D	103	Avian Respiratory Complex Ii With Oxaloacetate And		7e-08

>pdb|3VR8|D Chain D, Mitochondrial Rhodoquinol-Fumarate Reductase From The Parasitic Nematode Ascaris Suum Length = 156

Iteration: 1
 Score = 72.4 bits (176), Expect = 6e-14,   Method: Compositional matrix adjust.
 Identities = 34/102 (33%), Positives = 58/102 (56%)
Query: 26  HTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVG 85
           H TL+ IER+ +A ++ +IPAAY +    ++  L +++ +H HWG+  +V DY RP V+G
Sbjct: 55  HGTLFKIERYFAAAMVPLIPAAYFIHGREMDLCLALALTLHVHWGVWGVVNDYGRPFVLG 114
Query: 86  VALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             LA    +  YI +   LAGL+    +  G+    + +W +
Sbjct: 115 DTLAAAVRVGAYIFTACLLAGLLYFNEHDVGLTRAFEMVWEL 156

>pdb|1ZOY|D Chain D, Crystal Structure Of Mitochondrial Respiratory Complex Ii From Porcine Heart At 2.4 Angstroms Length = 103

Iteration: 1
 Score = 64.7 bits (156), Expect = 1e-11,   Method: Compositional matrix adjust.
 Identities = 38/98 (38%), Positives = 53/98 (54%), Gaps = 4/98 (4%)
Query: 30  WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALA 89
           WT ER +S  LL ++PAAYL P  A++Y+L  ++ +H HWGI  +V DY R    G AL 
Sbjct: 10  WTGERVVSVLLLGLLPAAYLNPCSAMDYSLAAALTLHGHWGIGQVVTDYVR----GDALQ 65
Query: 90  KIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           K     +  LS  T AGL     +  G+ +    LW +
Sbjct: 66  KAAKAGLLALSAFTFAGLCYFNYHDVGICKAVAMLWKL 103

>pdb|1YQ3|D Chain D, Avian Respiratory Complex Ii With Oxaloacetate And Ubiquinone Length = 103

Iteration: 1
 Score = 52.4 bits (124), Expect = 7e-08,   Method: Compositional matrix adjust.
 Identities = 37/98 (37%), Positives = 56/98 (57%), Gaps = 4/98 (4%)
Query: 30  WTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALA 89
           WT ER +SA LL ++PAAYL P  A++Y+L  ++ +H HWG+  ++ DY    V G    
Sbjct: 10  WTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDY----VHGDTPI 65
Query: 90  KIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           K+ +  +Y+LS IT  GL        G+ +    LW+I
Sbjct: 66  KVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 103
  Database: pdbaa

Structure Templates Detected by RPS-BLAST

Original result of RPS-BLAST against PDB70 database

ID	Length	Definition	E-value
Query	130
3vr8_D	156	Succinate dehydrogenase [ubiquinone] cytochrome B	3e-29
2h88_D	103	Succinate dehydrogenase cytochrome B, small subun;	9e-25

>3vr8_D Succinate dehydrogenase [ubiquinone] cytochrome B subunit, mitochondrial; membrane protein, reductase, mitochondria MEMB oxidoreductase; HET: FAD HEM RQX EPH; 2.81A {Ascaris suum} PDB: 3vrb_D* Length = 156

 Score =  102 bits (256), Expect = 3e-29
 Identities = 34/116 (29%), Positives = 60/116 (51%)

Query: 12  TQVQHDAAVHSKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGI 71
             +  +        H TL+ IER+ +A ++ +IPAAY +    ++  L +++ +H HWG+
Sbjct: 41  DPIAAEKGFKPLHSHGTLFKIERYFAAAMVPLIPAAYFIHGREMDLCLALALTLHVHWGV 100

Query: 72  EALVVDYARPEVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
             +V DY RP V+G  LA    +  YI +   LAGL+    +  G+    + +W +
Sbjct: 101 WGVVNDYGRPFVLGDTLAAAVRVGAYIFTACLLAGLLYFNEHDVGLTRAFEMVWEL 156

>2h88_D Succinate dehydrogenase cytochrome B, small subun; complex II, membrane protein, heme protein, iron sulfur PROT cytochrome B, oxidoreductase; HET: FAD BHG HEM UNL; 1.74A {Gallus gallus} PDB: 1yq4_D* 1yq3_D* 2fbw_D* 2h89_D* 2wqy_D* 1zoy_D* 1zp0_D* 3abv_D* 3ae1_D* 3ae2_D* 3ae3_D* 3ae4_D* 3ae5_D* 3ae6_D* 3ae7_D* 3ae8_D* 3ae9_D* 3aea_D* 3aeb_D* 3aec_D* ... Length = 103

 Score = 89.6 bits (222), Expect = 9e-25
 Identities = 36/106 (33%), Positives = 57/106 (53%), Gaps = 4/106 (3%)

Query: 22  SKSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARP 81
           S    +  WT ER +SA LL ++PAAYL P  A++Y+L  ++ +H HWG+  ++ DY   
Sbjct: 2   SSKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDYVHG 61

Query: 82  EVVGVALAKIFHLSVYILSIITLAGLMNLILNGGGVVEGTKKLWAI 127
           +       K+ +  +Y+LS IT  GL        G+ +    LW+I
Sbjct: 62  DTPI----KVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 103

Structure Templates Detected by HHsearch

Original result of HHsearch against PDB70 database

ID	Length	Definition	Probability
Query	130
3vr8_D	156	Succinate dehydrogenase [ubiquinone] cytochrome B	100.0
2h88_D	103	Succinate dehydrogenase cytochrome B, small subun;	100.0
2wdq_D	115	Succinate dehydrogenase hydrophobic membrane ANCH	99.23
2wdq_C	129	Succinate dehydrogenase cytochrome B556 subunit; s	92.87

>3vr8_D Succinate dehydrogenase [ubiquinone] cytochrome B subunit, mitochondrial; membrane protein, reductase, mitochondria MEMB oxidoreductase; HET: FAD HEM RQX EPH; 2.81A {Ascaris suum} PDB: 3vrb_D*

Probab=100.00  E-value=8.2e-45  Score=276.97  Aligned_cols=105  Identities=32%  Similarity=0.675  Sum_probs=102.1

Q ss_pred             CCCCcchhHHHHHHHHHHHHHHHHhhhCchHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHHHHHHHHHHHHHH
Q psy10707         23 KSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSII  102 (130)
Q Consensus        23 ~~~gs~hW~~ERi~s~aLlpL~~~~~~~p~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k~a~~~l~~~S~~  102 (130)
                      ..+||+||++||++|++|+||+|++++.|||++|.+|++++++|+|||||+||+||||||+||+.++|+++++++++|++
T Consensus        52 a~~Gs~HW~~ERvtAvaLlpL~~~a~~~~~pvlD~lLa~al~~H~h~GfqsvI~DYVp~rv~g~~~~K~A~~lL~~~s~~  131 (156)
T 3vr8_D           52 LHSHGTLFKIERYFAAAMVPLIPAAYFIHGREMDLCLALALTLHVHWGVWGVVNDYGRPFVLGDTLAAAVRVGAYIFTAC  131 (156)
T ss_dssp             CCCSHHHHHHHHHHHHHHHHHHHHHHHSCSHHHHHHHHHHHHHHHHHHHHHHHHHHSCHHHHCHHHHHHHHHHHHHHHHH
T ss_pred             CccchHHHHHHHHHHHHHHHHHHHHHHcCCHHHHHHHHHHHHHHHHHhhhhhhheecchhhcCchHHHHHHHHHHHHHHH
Confidence            35899999999999999999999999999999999999999999999999999999999999988999999999999999


Q ss_pred             HHhhheeEeecCCchHHHHHhhccc
Q psy10707        103 TLAGLMNLILNGGGVVEGTKKLWAI  127 (130)
Q Consensus       103 tl~GLy~f~t~dvGi~~~vk~lW~~  127 (130)
                      +++|||+|||||+||+++||++|++
T Consensus       132 tl~GLy~f~t~dvGit~~Ik~lW~l  156 (156)
T 3vr8_D          132 LLAGLLYFNEHDVGLTRAFEMVWEL  156 (156)
T ss_dssp             HHHHHHHHHHTSSCHHHHHHHHHTC
T ss_pred             HHHHheEeeecCccHHHHHHHHhcC
Confidence            9999999999999999999999974

>2h88_D Succinate dehydrogenase cytochrome B, small subun; complex II, membrane protein, heme protein, iron sulfur PROT cytochrome B, oxidoreductase; HET: FAD BHG HEM UNL; 1.74A {Gallus gallus} PDB: 1yq4_D* 1yq3_D* 2fbw_D* 2h89_D* 2wqy_D* 1zoy_D* 1zp0_D* 3abv_D* 3ae1_D* 3ae2_D* 3ae3_D* 3ae4_D* 3ae5_D* 3ae6_D* 3ae7_D* 3ae8_D* 3ae9_D* 3aea_D* 3aeb_D* 3aec_D* ...

Probab=100.00  E-value=1.8e-42  Score=248.06  Aligned_cols=101  Identities=35%  Similarity=0.686  Sum_probs=96.0

Q ss_pred             CCCCcchhHHHHHHHHHHHHHHHHhhhCchHHHHHHHHHHHHHHHHhhccceeeeccCCcchhhhHHHHHHHHHHHHHHH
Q psy10707         23 KSDHTTLWTIERFLSAGLLAVIPAAYLVPSVALEYALVVSIVMHSHWGIEALVVDYARPEVVGVALAKIFHLSVYILSII  102 (130)
Q Consensus        23 ~~~gs~hW~~ERi~s~aLlpL~~~~~~~p~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~~gp~~~k~a~~~l~~~S~~  102 (130)
                      ..+||+||++||++|++|+||+|+++..|||++|.++++++++|+|+|||+||+||||+++    .++.++++++++|++
T Consensus         3 ak~Gs~HW~~eR~~avallpL~p~~~~~~~pv~d~~l~~~l~~H~~~G~q~vI~DYv~~~~----~~~~~~~~~~~~s~~   78 (103)
T 2h88_D            3 SKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDYVHGDT----PIKVANTGLYVLSAI   78 (103)
T ss_dssp             CCHHHHHHHHHHHHHHHHHHHHHHHHHSCSHHHHHHHHHHHHHHHHHHHHHHHHHHCCSHH----HHHHHHHHHHHHHHH
T ss_pred             CcccchhhHHHHHHHHHHHHHHHHHHHcCcHHHHHHHHHHHHHHHHHhcCeeeecccccch----HHHHHHHHHHHHHHH
Confidence            4579999999999999999999999999999999999999999999999999999999764    567899999999999


Q ss_pred             HHhhheeEeecCCchHHHHHhhccc
Q psy10707        103 TLAGLMNLILNGGGVVEGTKKLWAI  127 (130)
Q Consensus       103 tl~GLy~f~t~dvGi~~~vk~lW~~  127 (130)
                      +++|||+|||||+|++++||++|++
T Consensus        79 t~~Gl~~~~~~d~Gi~~~ik~lW~l  103 (103)
T 2h88_D           79 TFTGLCYFNYYDVGICKAVAMLWSI  103 (103)
T ss_dssp             HHHHHHHHHHHSSCHHHHHHHHHTC
T ss_pred             HHHHHheeeecCCcHHHHHHHHhcC
Confidence            9999999999999999999999985

>2wdq_D Succinate dehydrogenase hydrophobic membrane ANCH subunit; succinate dehydrogenase activity, cell inner membrane, trica acid cycle; HET: FAD HEM CBE; 2.40A {Escherichia coli} PDB: 1nen_D* 2acz_D* 1nek_D* 2wdr_D* 2wdv_D* 2wp9_D* 2wu2_D* 2ws3_D* 2wu5_D*

Probab=99.23  E-value=1.6e-11  Score=87.96  Aligned_cols=78  Identities=17%  Similarity=0.238  Sum_probs=60.0

Q ss_pred             ccCCCCcchhHHHHHHHHHHHHHHHHhh------------------hCc-hHHHHHHHHHHHHHHHHhhccceeeeccCC
Q psy10707         21 HSKSDHTTLWTIERFLSAGLLAVIPAAY------------------LVP-SVALEYALVVSIVMHSHWGIEALVVDYARP   81 (130)
Q Consensus        21 ~~~~~gs~hW~~ERi~s~aLlpL~~~~~------------------~~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~   81 (130)
                      .++.+|++||.+||+++++|+|++++.+                  ..| .+++|.++..++..|...|++.+++||+++
T Consensus         7 ~~~~~G~~~Wi~~RiSgv~L~~l~~~~l~~~~~~~~~~y~~~~~~~~~p~~~i~~~l~l~~~~~H~~~Gir~ii~Dyv~~   86 (115)
T 2wdq_D            7 ALGRNGVHDFILVRATAIVLTLYIIYMVGFFATSGELTYEVWIGFFASAFTKVFTLLALFSILIHAWIGMWQVLTDYVKP   86 (115)
T ss_dssp             ----CHHHHHHHHHHHHHHHHHHHHHHHHHHTTCSSCCHHHHHHHHHSHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCS
T ss_pred             CCCCccHHHHHHHHHHHHHHHHHHHHHHHHHHHcCccCHHHHHHHHHChHHHHHHHHHHHHHHHHHHHHHHHHHHHHccc
Confidence            4566899999999999999999999875                  123 578999999999999999999999999986


Q ss_pred             cchhhhHHHHHHHHHHHHHHH
Q psy10707         82 EVVGVALAKIFHLSVYILSII  102 (130)
Q Consensus        82 ~~~gp~~~k~a~~~l~~~S~~  102 (130)
                      +    ..+.....++....+.
T Consensus        87 ~----~~R~~l~~~~~~~~~~  103 (115)
T 2wdq_D           87 L----ALRLMLQLVIVVALVV  103 (115)
T ss_dssp             H----HHHHHHHHHHHHHHHH
T ss_pred             h----hHHHHHHHHHHHHHHH
Confidence            4    4455555555544433

>2wdq_C Succinate dehydrogenase cytochrome B556 subunit; succinate dehydrogenase activity, cell inner membrane, trica acid cycle; HET: FAD HEM CBE; 2.40A {Escherichia coli} PDB: 1nen_C* 2acz_C* 1nek_C* 2wdr_C* 2wdv_C* 2wp9_C* 2ws3_C* 2wu5_C* 2wu2_C*

Probab=92.87  E-value=0.48  Score=33.61  Aligned_cols=56  Identities=11%  Similarity=0.189  Sum_probs=41.4

Q ss_pred             CCcchhHHHHHHHHHHHHHHHHh-------hhCc--------------hHHHHHHHHHHHHHHHHhhccceeeeccC
Q psy10707         25 DHTTLWTIERFLSAGLLAVIPAA-------YLVP--------------SVALEYALVVSIVMHSHWGIEALVVDYAR   80 (130)
Q Consensus        25 ~gs~hW~~ERi~s~aLlpL~~~~-------~~~p--------------~~v~D~~La~~l~~H~h~G~~svI~DYv~   80 (130)
                      -.+.-|.++|++.++|.-.++..       +..|              ..+++..++.++.+|.--|+..++.||-.
T Consensus        22 ~t~~~silhRiTGv~L~~~~~~~~~~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~a~~yH~~nGiRhl~~D~G~   98 (129)
T 2wdq_C           22 ITAIASILHRVSGVITFVAVGILLWLLGTSLSSPEGFEQASAIMGSFFVKFIMWGILTALAYHVVVGIRHMMMDFGY   98 (129)
T ss_dssp             HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHSCHHHHHHHHHHHHSHHHHHHHHHHHHHHHHHHHHHHHHHHHHTTS
T ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHcCHHHHHHHHHHHHhHHHHHHHHHHHHHHHHHHHHhHHHHHhhccc
Confidence            34567899999999886544321       1112              24677888999999999999999999943

---

Homologous Structure Domains

Structure Domains Detected by RPS-BLAST

Original result of RPS-BLAST against SCOP70(version1.75) database

No hit with e-value below 0.005

Homologous Domains Detected by HHsearch

Original result of HHsearch against SCOP70(version1.75) database

ID	Length	Definition	Probability
Query	130
d1nekd_	113	Succinate dehydrogenase subunit SdhD {Escherichia	99.4

>d1nekd_ f.21.2.2 (D:) Succinate dehydrogenase subunit SdhD {Escherichia coli [TaxId: 562]}

class: Membrane and cell surface proteins and peptides
fold: Heme-binding four-helical bundle
superfamily: Fumarate reductase respiratory complex transmembrane subunits
family: Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
domain: Succinate dehydrogenase subunit SdhD
species: Escherichia coli [TaxId: 562]

Probab=99.40  E-value=1.7e-13  Score=96.16  Aligned_cols=72  Identities=17%  Similarity=0.232  Sum_probs=58.8

Q ss_pred             CCCCcchhHHHHHHHHHHHHHHHHhhh------------------Cc-hHHHHHHHHHHHHHHHHhhccceeeeccCCcc
Q psy10707         23 KSDHTTLWTIERFLSAGLLAVIPAAYL------------------VP-SVALEYALVVSIVMHSHWGIEALVVDYARPEV   83 (130)
Q Consensus        23 ~~~gs~hW~~ERi~s~aLlpL~~~~~~------------------~p-~~v~D~~La~~l~~H~h~G~~svI~DYv~~~~   83 (130)
                      +.+|++||.+||++++.|+|++++.+.                  .| +.+++.++.++...|+..|+|.|++||++++.
T Consensus         7 ~rsG~~~W~~qRvSAv~l~~l~~~~~~~~~~~~~~~y~~~~~~~~~~~~~il~~l~l~~~~~H~~lGl~~IieDYi~~~~   86 (113)
T d1nekd_           7 GRNGVHDFILVRATAIVLTLYIIYMVGFFATSGELTYEVWIGFFASAFTKVFTLLALFSILIHAWIGMWQVLTDYVKPLA   86 (113)
T ss_dssp             SSSHHHHHHHHHHHHHHHHHHHHHHHHHHTTTSSCCHHHHHHHHSSHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCSHH
T ss_pred             cccHHHHHHHHHHHHHHHHHHHHHHHHHHHHcCCCCHHHHHHHHhChHHHHHHHHHHHHHHHHHHHhHhhhHHHhcCChh
Confidence            448999999999999999999998771                  22 57899999999999999999999999999763


Q ss_pred             hhhhHHHHHHHHHHH
Q psy10707         84 VGVALAKIFHLSVYI   98 (130)
Q Consensus        84 ~gp~~~k~a~~~l~~   98 (130)
                          .++.+..+...
T Consensus        87 ----~r~~~~~~~~~   97 (113)
T d1nekd_          87 ----LRLMLQLVIVV   97 (113)
T ss_dssp             ----HHHHHHHHHHH
T ss_pred             ----HHHHHHHHHHH
Confidence                44444444443