Psyllid ID: psy16324


Local Sequence Feature Prediction

Prediction and (Method)Result
Residue Number Marker
Protein Sequence ?
Secondary Structure (PSIPRED) ?
Secondary Structure Prediction (SSPRO) ?
Coil and Loop (DISEMBL) ?
Flexible Loop (DISEMBL) ?
Low Complexity Region (SEG) ?
Disordered region (IsUnstruct) ?
Disordered Region (DISOPRED) ?
Disordered Region (DISEMBL) ?
Disordered Region (DISPRO) ?
Transmembrane Helix (TMHMM) ?
Transmembrane Helix (HMMTOP) ?
Transmembrane Helix (MEMSAT) ?
TM Helix, Signal Peptide (MEMSAT_SVM) ?
TM Helix, Signal Peptide (Phobius) ?
Signal Peptide (SignalP HMM Mode) ?
Signal Peptide (SignalP NN Mode) ?
Coiled Coils (COILS) ?
Positional Conservation ?
 
--------10--------20--------30--------40--------50--------60--------70--------80--------90-------100-------110-------120-------130-------140-------150-------160-------170-------180-------190-------200-------210-------220-------230-------240-------250-
MEEEETKLQNSDKDEDSEEDDEEGEGEKEEKLEVEPEEQTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQPAYI
ccHHHHHHHccccccccccccccccccHHHHHcccHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHcHHHHHHHHccccccEEEEEEEEEEEccccccccccccccccccccccEEEEEEcccccccccccccccccccccccccEEEcccccccccccccHHHHHHHHcccccccccccccccccEEEEccccccEEEEEccHHHHHHHHHHHHHHHHHHHHHHHHEEEEEEcccccccccccc
ccHHHHHHHccccccccccccccccccccccccccHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHcHHEEcHHHHHHHHccccccEEEEEEEEEEcccccccccccccccccccccccEEEEEEEEcccccccHHccccccccccccccEEEEccccccccccccHHHHHHHHccccccccHHHccccccEEEEcccccEEEEEcccHHHHHHHHHHHHHcHHHHHHHHHHHHHHHHcccccccccccc
meeeetklqnsdkdedseeddeegegekeeklevepeeqTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMAdyeaepvtcnisrhdinlgisncnwascregctaqmikchQISVHYSrmffkdynkshspgpipwdhedIRFLintegcgyppgtnctnfvkqyglpespsqkssppkpfpcyyskvfptlHVVAKYNWDDNLRYLILALVVPIVLFFGsltilgywycprkskvqpayi
meeeetklqnsdkdedseeddeegegekeeklevepeeqtTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQPAYI
MEEEETKLQNSdkdedseeddeegegekeeklevepeeQTTLQKAKFYVSLCSGVTACLSafaflflipfiiepaiKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLpespsqkssppkpfpCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQPAYI
******************************************QKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYG**************FPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPR*********
********************************************AKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQ****
****************************************TLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGL***********KPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQPAYI
*******************************LEVEPEEQTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQ****
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHHooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHHooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiii
ooooooooooooooooooooooooooooooooooooooooooooooHHHHHHHHHHHHHHHHHHHHHHHHHHiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiHHHHHHHHHHHHHHHHHHHHHHHHoooooooooooo
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xxxxxxxxxxxxxxxxxxxxxEEGEGEKEEKLEVEPEEQTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSKVQPAYI
no confident homologs detected

Close Homologs for Annotation Transfer

Close Homologs in SWISS-PROT Database Detected by BLAST ?

ID ?Alignment graph ?Length ? Definition ? RBH(Q2H) ? RBH(H2Q) ? Q cover ? H cover ? Identity ? E-value ?
Query251 2.2.26 [Sep-21-2011]
P48613 452 Protein tipE OS=Drosophil no N/A 0.330 0.183 0.430 1e-16
>sp|P48613|TIPE_DROME Protein tipE OS=Drosophila melanogaster GN=tipE PE=2 SV=1 Back     alignment and function desciption
 Score = 87.0 bits (214), Expect = 1e-16,   Method: Compositional matrix adjust.
 Identities = 40/93 (43%), Positives = 54/93 (58%)

Query: 35  EPEEQTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISR 94
           E +++T  +K  FY +    +    S FAFLFL+PF+IEPA  TI   +E  P  C    
Sbjct: 4   EQDKRTGKEKLLFYTTAFFILLGTFSLFAFLFLVPFVIEPAFTTIFMQFEEVPALCETYD 63

Query: 95  HDINLGISNCNWASCREGCTAQMIKCHQISVHY 127
            +I  G  NC+W+SCREGCT  +  C QI V+Y
Sbjct: 64  TEIYYGAKNCSWSSCREGCTKDIYTCTQIRVNY 96




Enhances para sodium channel function. Required during pupal development to rescue adult paralysis and also protects adult flys against heat-induced lethality.
Drosophila melanogaster (taxid: 7227)

Close Homologs in the Non-Redundant Database Detected by BLAST ?

GI ?Alignment Graph ?Length ? Definition ? Q cover ? H cover ? Identity ? E-value ?
Query251
242020102280 conserved hypothetical protein [Pediculu 0.776 0.696 0.571 4e-63
157126734290 sodium channel, auxiliary protein, putat 0.892 0.772 0.495 4e-61
347968617290 AGAP002818-PA [Anopheles gambiae str. PE 0.764 0.662 0.547 4e-60
380028647252 PREDICTED: protein tipE-like [Apis flore 0.796 0.793 0.535 1e-59
189234061227 PREDICTED: similar to AGAP002818-PA [Tri 0.788 0.872 0.526 3e-59
340709657252 PREDICTED: protein tipE-like [Bombus ter 0.796 0.793 0.531 3e-59
270014435218 hypothetical protein TcasGA2_TC001707 [T 0.788 0.908 0.526 4e-59
307200253242 Protein tipE [Harpegnathos saltator] 0.804 0.834 0.511 6e-59
350419489252 PREDICTED: protein tipE-like [Bombus imp 0.796 0.793 0.521 8e-59
170036176278 sodium channel, auxiliary protein [Culex 0.840 0.758 0.493 1e-58
>gi|242020102|ref|XP_002430495.1| conserved hypothetical protein [Pediculus humanus corporis] gi|212515652|gb|EEB17757.1| conserved hypothetical protein [Pediculus humanus corporis] Back     alignment and taxonomy information
 Score =  247 bits (630), Expect = 4e-63,   Method: Compositional matrix adjust.
 Identities = 116/203 (57%), Positives = 142/203 (69%), Gaps = 8/203 (3%)

Query: 39  QTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDIN 98
           QT L+KAKFYVSLC G TA +S FAFLFLIPF+++PAI TI+ADYE EPV C +  H  +
Sbjct: 27  QTLLEKAKFYVSLCMGTTAIISVFAFLFLIPFVVDPAISTIIADYEQEPVICKVIEHVYS 86

Query: 99  LGISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTE 158
            G+ NC WASCREGCT  ++KCHQI+V YS+  + D+ K      + WD  + +F INTE
Sbjct: 87  EGLRNCTWASCREGCTTAVLKCHQITVSYSKNSYNDFLKDQDLTSMNWDVNETKFFINTE 146

Query: 159 GCGYPPGTNCTNFVKQYGLPESPSQKSSPPKPFPCYYSKVFPTLHVVAKYNWDDNLRYLI 218
           GCGYPP  NC+ F  QYG         +  K FPCYYSK +P + VVA Y+WDDNLR+LI
Sbjct: 147 GCGYPPKINCSEFASQYG-------NKNVGKIFPCYYSKTYPEI-VVAHYSWDDNLRHLI 198

Query: 219 LALVVPIVLFFGSLTILGYWYCP 241
           LALVVP   F  ++TIL YWYCP
Sbjct: 199 LALVVPTTCFIVAITILTYWYCP 221




Source: Pediculus humanus corporis

Species: Pediculus humanus

Genus: Pediculus

Family: Pediculidae

Order: Phthiraptera

Class: Insecta

Phylum: Arthropoda

Superkingdom: Eukaryota

>gi|157126734|ref|XP_001654727.1| sodium channel, auxiliary protein, putative [Aedes aegypti] gi|108882513|gb|EAT46738.1| AAEL002088-PA [Aedes aegypti] Back     alignment and taxonomy information
>gi|347968617|ref|XP_312094.5| AGAP002818-PA [Anopheles gambiae str. PEST] gi|333467922|gb|EAA07853.5| AGAP002818-PA [Anopheles gambiae str. PEST] Back     alignment and taxonomy information
>gi|380028647|ref|XP_003698005.1| PREDICTED: protein tipE-like [Apis florea] Back     alignment and taxonomy information
>gi|189234061|ref|XP_969868.2| PREDICTED: similar to AGAP002818-PA [Tribolium castaneum] Back     alignment and taxonomy information
>gi|340709657|ref|XP_003393419.1| PREDICTED: protein tipE-like [Bombus terrestris] Back     alignment and taxonomy information
>gi|270014435|gb|EFA10883.1| hypothetical protein TcasGA2_TC001707 [Tribolium castaneum] Back     alignment and taxonomy information
>gi|307200253|gb|EFN80532.1| Protein tipE [Harpegnathos saltator] Back     alignment and taxonomy information
>gi|350419489|ref|XP_003492198.1| PREDICTED: protein tipE-like [Bombus impatiens] Back     alignment and taxonomy information
>gi|170036176|ref|XP_001845941.1| sodium channel, auxiliary protein [Culex quinquefasciatus] gi|167878739|gb|EDS42122.1| sodium channel, auxiliary protein [Culex quinquefasciatus] Back     alignment and taxonomy information

Prediction of Gene Ontology (GO) Terms

Close Homologs with Gene Ontology terms Detected by BLAST ?

ID ? Alignment graph ? Length ? Definition ? Q cover ? H cover ? Identity ? E-value ?
Query251
FB|FBgn0035505313 Teh2 "tipE homolog 2" [Drosoph 0.772 0.619 0.433 7.1e-45
FB|FBgn0037766279 Teh1 "tipE homolog 1" [Drosoph 0.629 0.566 0.298 1.2e-17
FB|FBgn0003710 452 tipE "temperature-induced para 0.199 0.110 0.44 2.3e-15
FB|FBgn0035504 524 Teh4 "tipE homolog 4" [Drosoph 0.294 0.141 0.363 3.6e-08
FB|FBgn0040697448 Teh3 "tipE homolog 3" [Drosoph 0.318 0.178 0.309 2.5e-06
FB|FBgn0035505 Teh2 "tipE homolog 2" [Drosophila melanogaster (taxid:7227)] Back     alignment and assigned GO terms
 Score = 472 (171.2 bits), Expect = 7.1e-45, P = 7.1e-45
 Identities = 88/203 (43%), Positives = 125/203 (61%)

Query:    40 TTLQKAKFYVSLCSGVTACLSXXXXXXXXXXXXXXXXKTIMADYEAEPVTCNISRHDINL 99
             T L+KAKFY S+C G TA LS                 TI+ADY+  PVTC +  H    
Sbjct:    79 TLLEKAKFYTSVCLGTTAILSVFTFLFLIPFVVDPAISTIIADYDPVPVTCIVIDHIYAE 138

Query:   100 GISNCNWASCREGCTAQMIKCHQISVHYSRMFFKDYNKS-HSPGPIPWDHEDIRFLINTE 158
             GI NC+W+SCREGCT+ + KCHQ+ V+Y+R+ F ++ ++      + WD    +FLIN+E
Sbjct:   139 GIKNCSWSSCREGCTSSLTKCHQLFVNYTRIPFSEWERNPRDLDTVNWDVSYTKFLINSE 198

Query:   159 GCGYPPGTNCTNFVKQYGLXXXXXXXXXXXXXXXCYYSKVFPTLHVVAKYNWDDNLRYLI 218
             GCGYPP TNC+ F +QYG                C+YS+ +P + V+ +Y+W++NL +LI
Sbjct:   199 GCGYPPTTNCSIFARQYGFSHIGEPFP-------CFYSRAYPEV-VIGRYSWENNLYHLI 250

Query:   219 LALVVPIVLFFGSLTILGYWYCP 241
             L+L++P VLF  S+ +L YWYCP
Sbjct:   251 LSLIIPNVLFAISIGVLSYWYCP 273




GO:0016021 "integral to membrane" evidence=ISM
GO:0017080 "sodium channel regulator activity" evidence=IDA
GO:0002028 "regulation of sodium ion transport" evidence=IDA
FB|FBgn0037766 Teh1 "tipE homolog 1" [Drosophila melanogaster (taxid:7227)] Back     alignment and assigned GO terms
FB|FBgn0003710 tipE "temperature-induced paralytic E" [Drosophila melanogaster (taxid:7227)] Back     alignment and assigned GO terms
FB|FBgn0035504 Teh4 "tipE homolog 4" [Drosophila melanogaster (taxid:7227)] Back     alignment and assigned GO terms
FB|FBgn0040697 Teh3 "tipE homolog 3" [Drosophila melanogaster (taxid:7227)] Back     alignment and assigned GO terms

Prediction of Enzyme Commission (EC) Number

EC Number Prediction by Annotation Transfer from SWISS-PROT Entries ?

No confident hit for EC number transfering in SWISSPROT detected by BLAST

EC Number Prediction by EFICAz Software ?

No EC number assignment, probably not an enzyme!


Prediction of Functionally Associated Proteins


Conserved Domains and Related Protein Families

Conserved Domains Detected by RPS-BLAST ?

No hit with e-value below 0.005

Conserved Domains Detected by HHsearch ?

ID ?Alignment Graph ?Length ? Definition ? Probability ?
Query 251
PF03185201 CaKB: Calcium-activated potassium channel, beta su 99.92
>PF03185 CaKB: Calcium-activated potassium channel, beta subunit; InterPro: IPR003930 Potassium channels are the most diverse group of the ion channel family [, ] Back     alignment and domain information
Probab=99.92  E-value=1e-26  Score=203.88  Aligned_cols=174  Identities=21%  Similarity=0.440  Sum_probs=0.4

Q ss_pred             chhhHHHHHhhhhHHHHHHHHHHHHHHHHHhhhhhhhchhHHHHhhcCCCcceeeeeeeeeecCCCcCCccccccccccc
Q psy16324         36 PEEQTTLQKAKFYVSLCSGVTACLSAFAFLFLIPFIIEPAIKTIMADYEAEPVTCNISRHDINLGISNCNWASCREGCTA  115 (251)
Q Consensus        36 p~~~t~~ek~~FYttl~l~~tavlSlfafLFLvPfvvdPAisti~~~f~~~Pv~C~tt~~~~~~G~~NCtWsSCREGCTs  115 (251)
                      -|+|.++      +++.+++.|++++|.+++.   |+-|++...+    .++++||+....+.....+|+. ||+-.|.+
T Consensus        11 gedrai~------lg~~m~~~svlm~~vlGit---iv~P~l~s~~----~~et~Ctvl~s~i~~~~v~Cs~-~cg~~c~~   76 (201)
T PF03185_consen   11 GEDRAIL------LGFAMMICSVLMLFVLGIT---IVKPYLKSLW----FEETNCTVLSSHIVGEWVDCSF-SCGSDCRG   76 (201)
T ss_dssp             S-------------------------------------------------------------------------------
T ss_pred             cchHHHH------HHHHHHHHHHHHHHHHHHh---ccchhhhhcc----cccceEEEEEEEeecccccccc-cCCCCCCC
Confidence            3467888      8888899999999999997   9999999866    5899999999999988899999 99999998


Q ss_pred             Cc-ccceEEEEEeeccchhcccccCCCCCCCCcccccEEeeccCCCCCCCCCc---hh------HHHHHhCCCCCCCCCC
Q psy16324        116 QM-IKCHQISVHYSRMFFKDYNKSHSPGPIPWDHEDIRFLINTEGCGYPPGTN---CT------NFVKQYGLPESPSQKS  185 (251)
Q Consensus       116 ~~-y~C~QI~Vnys~~~~~~~~~~~~~~~~~w~~~esrLliN~kGCgypP~~n---Ck------~F~~~YG~dg~~~~~~  185 (251)
                      .+ |+|.||+|||+.+.-..          ..+.+|..+..|.| |.|+|++.   -+      +|.+.||..       
T Consensus        77 ~s~yPCLqV~Vn~t~sg~~a----------~L~~~E~~l~~n~k-CsY~P~C~~d~~~~~~~V~~~~~~~~~~-------  138 (201)
T PF03185_consen   77 VSKYPCLQVFVNYTHSGQTA----------LLHHDEETLDSNPK-CSYIPKCHRDRQDNRAEVEDFQENFGQQ-------  138 (201)
T ss_dssp             --------------------------------------------------------------------------------
T ss_pred             cCCCCceEEEEEecCCCceE----------EEEEchHhhccCCc-ceecCcccccHHHHHHHHHHHHHHhhhc-------
Confidence            88 99999999998755433          77889999999999 99999641   11      366666633       


Q ss_pred             CCCCcceeeeeCCC-CCceeEEecchhhhHHHHHHHhhhhHHHHHHHHHhhhhhccCCcCC
Q psy16324        186 SPPKPFPCYYSKVF-PTLHVVAKYNWDDNLRYLILALVVPIVLFFGSLTILGYWYCPRKSK  245 (251)
Q Consensus       186 ~aga~FPCYYSr~~-p~~~Vvar~d~d~t~~~Li~a~~VP~vlFvvS~i~L~~~~C~~~~k  245 (251)
                       +|++|||||++.+ |+. ||.+...+..  .++|+|+||.++|+++++++.+..|.+.+-
T Consensus       139 -~gq~f~Cfy~P~~~~~~-Vil~r~y~~~--~~fhslfWP~l~lvgG~liv~mvk~~q~ls  195 (201)
T PF03185_consen  139 -NGQTFPCFYDPDNQPED-VILRRKYDPS--VLFHSLFWPSLMLVGGVLIVAMVKLTQYLS  195 (201)
T ss_dssp             -------------------------------------------------------------
T ss_pred             -cCcceeeeecCCCCcce-EEEEEecCHh--HHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Confidence             4899999999995 688 9989888888  699999999999999999999999987543



They are important in shaping the action potential, and in neuronal excitability and plasticity []. The potassium channel family is composed of several functionally distinct isoforms, which can be broadly separated into 2 groups []: the practically non-inactivating 'delayed' group and the rapidly inactivating 'transient' group. These are all highly similar proteins, with only small amino acid changes causing the diversity of the voltage-dependent gating mechanism, channel conductance and toxin binding properties. Each type of K+ channel is activated by different signals and conditions depending on their type of regulation: some open in response to depolarisation of the plasma membrane; others in response to hyperpolarisation or an increase in intracellular calcium concentration; some can be regulated by binding of a transmitter, together with intracellular kinases; while others are regulated by GTP-binding proteins or other second messengers []. In eukaryotic cells, K+ channels are involved in neural signalling and generation of the cardiac rhythm, act as effectors in signal transduction pathways involving G protein-coupled receptors (GPCRs) and may have a role in target cell lysis by cytotoxic T-lymphocytes []. In prokaryotic cells, they play a role in the maintenance of ionic homeostasis []. All K+ channels discovered so far possess a core of alpha subunits, each comprising either one or two copies of a highly conserved pore loop domain (P-domain). The P-domain contains the sequence (T/SxxTxGxG), which has been termed the K+ selectivity sequence. In families that contain one P-domain, four subunits assemble to form a selective pathway for K+ across the membrane. However, it remains unclear how the 2 P-domain subunits assemble to form a selective pore. The functional diversity of these families can arise through homo- or hetero-associations of alpha subunits or association with auxiliary cytoplasmic beta subunits. K+ channel subunits containing one pore domain can be assigned into one of two superfamilies: those that possess six transmembrane (TM) domains and those that possess only two TM domains. The six TM domain superfamily can be further subdivided into conserved gene families: the voltage-gated (Kv) channels; the KCNQ channels (originally known as KvLQT channels); the EAG-like K+ channels; and three types of calcium (Ca)-activated K+ channels (BK, IK and SK) []. The 2TM domain family comprises inward-rectifying K+ channels. In addition, there are K+ channel alpha-subunits that possess two P-domains. These are usually highly regulated K+ selective leak channels. Ca2+-activated K+ channels are a diverse group of channels that are activated by an increase in intracellular Ca2+ concentration. They are found in the majority of nerve cells, where they modulate cell excitability and action potential. Three types of Ca2+-activated K+ channel have been characterised, termed small-conductance (SK), intermediate conductance (IK) and large conductance (BK) respectively []. BK channels (also referred to as maxi-K channels) are widely expressed in the body, being found in glandular tissue, smooth and skeletal muscle, as well as in neural tissues. They have been demonstrated to regulate arteriolar and airway diameter, and also neurotransmitter release. Each channel complex is thought to be composed of 2 types of subunit: the pore- forming (alpha) subunits and smaller accessory (beta) subunits. The beta subunit (which is thought to possess 2 TM domains) increases the Ca2+ sensitivity of the BK channel []. It does this by enhancing the time spent by the channel in burst-like open states. However, it has little effect on the durations of closed intervals between bursts, or on the numbers of open and closed states entered during gating []. ; GO: 0015269 calcium-activated potassium channel activity, 0006813 potassium ion transport, 0016020 membrane; PDB: 1JO6_A.


Homologous Structure Templates

Structure Templates Detected by BLAST ?

No homologous structure with e-value below 0.005

Structure Templates Detected by RPS-BLAST ?

No hit with e-value below 0.005

Structure Templates Detected by HHsearch ?

No hit with probability above 80.00


Homologous Structure Domains

Structure Domains Detected by RPS-BLAST ?

No hit with e-value below 0.005

Homologous Domains Detected by HHsearch ?

No hit with probability above 80.00