RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy10918
(207 letters)
>gnl|CDD|197706 smart00408, IGc2, Immunoglobulin C-2 Type.
Length = 63
Score = 45.1 bits (107), Expect = 5e-07
Identities = 17/66 (25%), Positives = 28/66 (42%), Gaps = 3/66 (4%)
Query: 19 EDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCV 78
E V C PV + W + K L + + + +L ++ V+ + +G YTCV
Sbjct: 1 EGQSVTLTCP-AEGNPVPNITWLKDGKPLPESN--RFVASGSTLTIKSVSLEDSGLYTCV 57
Query: 79 GFNIEG 84
N G
Sbjct: 58 AENSAG 63
>gnl|CDD|191810 pfam07679, I-set, Immunoglobulin I-set domain.
Length = 90
Score = 44.6 bits (106), Expect = 1e-06
Identities = 21/83 (25%), Positives = 33/83 (39%), Gaps = 8/83 (9%)
Query: 17 IKEDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTN----QSLVLQRVNRQSA 72
++E F C + P V W + + L + +T +L + V
Sbjct: 12 VQEGESARFTCTVTGDPDP-TVSWFKDGQPL--RSSDRFKVTYEGGTYTLTISNVQPDDE 68
Query: 73 GNYTCVGFNIEGDGESNAFFLNV 95
G YTCV N G+ E++A L V
Sbjct: 69 GKYTCVATNSAGEAEASA-ELTV 90
>gnl|CDD|143201 cd05724, Ig2_Robo, Second immunoglobulin (Ig)-like domain in Robo
(roundabout) receptors. Ig2_Robo: domain similar to
the second immunoglobulin (Ig)-like domain in Robo
(roundabout) receptors. Robo receptors play a role in
the development of the central nervous system (CNS),
and are receptors of Slit protein. Slit is a repellant
secreted by the neural cells in the midline. Slit acts
through Robo to prevent most neurons from crossing the
midline from either side. Three mammalian Robo homologs
(robo1, -2, and -3), and three mammalian Slit homologs
(Slit-1,-2, -3), have been identified. Commissural
axons, which cross the midline, express low levels of
Robo; longitudinal axons, which avoid the midline,
express high levels of Robo. robo1, -2, and -3 are
expressed by commissural neurons in the vertebrate
spinal cord and Slits 1, -2, -3 are expressed at the
ventral midline. Robo-3 is a divergent member of the
Robo family which instead of being a positive regulator
of slit responsiveness, antagonizes slit responsiveness
in precrossing axons. The Slit-Robo interaction is
mediated by the second leucine-rich repeat (LRR) domain
of Slit and the two N-terminal Ig domains of Robo, Ig1
and Ig2. The primary Robo binding site for Slit2 has
been shown by surface plasmon resonance experiments and
mutational analysis to be is the Ig1 domain, while the
Ig2 domain has been proposed to harbor a weak secondary
binding site.
Length = 86
Score = 41.2 bits (97), Expect = 2e-05
Identities = 17/58 (29%), Positives = 31/58 (53%)
Query: 38 VEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVGFNIEGDGESNAFFLNV 95
V WR + + L+ + + I+ + +L++ + G Y CV N+ G+ ES A L+V
Sbjct: 29 VSWRKDGQPLNLDNERVRIVDDGNLLIAEARKSDEGTYKCVATNMVGERESAAARLSV 86
>gnl|CDD|143170 cd04969, Ig5_Contactin_like, Fifth Ig domain of contactin.
Ig5_Contactin_like: Fifth Ig domain of contactins.
Contactins are neural cell adhesion molecules and are
comprised of six Ig domains followed by four
fibronectin type III(FnIII) domains anchored to the
membrane by glycosylphosphatidylinositol. The first
four Ig domains form the intermolecular binding
fragment, which arranges as a compact U-shaped module
via contacts between Ig domains 1 and 4, and between Ig
domains 2 and 3. Contactin-2 (TAG-1, axonin-1) may play
a part in the neuronal processes of neurite outgrowth,
axon guidance and fasciculation, and neuronal
migration. This group also includes contactin-1 and
contactin-5. The different contactins show different
expression patterns in the central nervous system.
During development and in adulthood, contactin-2 is
transiently expressed in subsets of central and
peripheral neurons. Contactin-5 is expressed
specifically in the rat postnatal nervous system,
peaking at about 3 weeks postnatal, and a lack of
contactin-5 (NB-2) results in an impairment of neuronal
act ivity in the rat auditory system. Contactin-5 is
highly expressed in the adult human brain in the
occipital lobe and in the amygdala. Contactin-1 is
differentially expressed in tumor tissues and may,
through a RhoA mechanism, facilitate invasion and
metastasis of human lung adenocarcinoma.
Length = 73
Score = 38.2 bits (89), Expect = 2e-04
Identities = 18/71 (25%), Positives = 28/71 (39%), Gaps = 2/71 (2%)
Query: 20 DSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVG 79
DV +C A P + W + L ++ ++ I + SL + V + G YTC
Sbjct: 1 GGDVIIECKPKAAPKP-TISWSKGTELLTNS-SRICIWPDGSLEILNVTKSDEGKYTCFA 58
Query: 80 FNIEGDGESNA 90
N G S
Sbjct: 59 ENFFGKANSTG 69
>gnl|CDD|214653 smart00410, IG_like, Immunoglobulin like. IG domains that cannot
be classified into one of IGv1, IGc1, IGc2, IG.
Length = 85
Score = 37.5 bits (87), Expect = 4e-04
Identities = 17/78 (21%), Positives = 27/78 (34%), Gaps = 4/78 (5%)
Query: 16 HIKEDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGII---MTNQSLVLQRVNRQSA 72
+KE V C + P +V W L + + + +L + V + +
Sbjct: 5 TVKEGESVTLSC-EASGSPPPEVTWYKQGGKLLAESGRFSVSRSGSTSTLTISNVTPEDS 63
Query: 73 GNYTCVGFNIEGDGESNA 90
G YTC N G S
Sbjct: 64 GTYTCAATNSSGSASSGT 81
Score = 28.6 bits (64), Expect = 0.64
Identities = 20/75 (26%), Positives = 26/75 (34%), Gaps = 17/75 (22%)
Query: 115 EKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSEL------- 167
E V +SCE +PP + +W + SG SV S L
Sbjct: 10 ESVTLSCEASGSPP-PEVTWYKQG--------GKLLAESGRFSVSRSGSTSTLTISNVTP 60
Query: 168 -DYGTLICWGSNKIG 181
D GT C +N G
Sbjct: 61 EDSGTYTCAATNSSG 75
>gnl|CDD|214652 smart00409, IG, Immunoglobulin.
Length = 85
Score = 37.5 bits (87), Expect = 4e-04
Identities = 17/78 (21%), Positives = 27/78 (34%), Gaps = 4/78 (5%)
Query: 16 HIKEDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGII---MTNQSLVLQRVNRQSA 72
+KE V C + P +V W L + + + +L + V + +
Sbjct: 5 TVKEGESVTLSC-EASGSPPPEVTWYKQGGKLLAESGRFSVSRSGSTSTLTISNVTPEDS 63
Query: 73 GNYTCVGFNIEGDGESNA 90
G YTC N G S
Sbjct: 64 GTYTCAATNSSGSASSGT 81
Score = 28.6 bits (64), Expect = 0.64
Identities = 20/75 (26%), Positives = 26/75 (34%), Gaps = 17/75 (22%)
Query: 115 EKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSEL------- 167
E V +SCE +PP + +W + SG SV S L
Sbjct: 10 ESVTLSCEASGSPP-PEVTWYKQG--------GKLLAESGRFSVSRSGSTSTLTISNVTP 60
Query: 168 -DYGTLICWGSNKIG 181
D GT C +N G
Sbjct: 61 EDSGTYTCAATNSSG 75
>gnl|CDD|143165 cd00096, Ig, Immunoglobulin domain. Ig: immunoglobulin (Ig)
domain found in the Ig superfamily. The Ig superfamily
is a heterogenous group of proteins, built on a common
fold comprised of a sandwich of two beta sheets.
Members of this group are components of immunoglobulin,
neuroglia, cell surface glycoproteins, such as, T-cell
receptors, CD2, CD4, CD8, and membrane glycoproteins,
such as, butyrophilin and chondroitin sulfate
proteoglycan core protein. A predominant feature of
most Ig domains is a disulfide bridge connecting the
two beta-sheets with a tryptophan residue packed
against the disulfide bond.
Length = 74
Score = 36.3 bits (83), Expect = 0.001
Identities = 18/74 (24%), Positives = 30/74 (40%), Gaps = 7/74 (9%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQ------GIIMTNQSLVLQRVNRQSAGNYT 76
V C + + PP + W N K L ++ G + +L + V + +G YT
Sbjct: 1 VTLTC-LASGPPPPTITWLKNGKPLPSSVLTRVRSSRGTSSGSSTLTISNVTLEDSGTYT 59
Query: 77 CVGFNIEGDGESNA 90
CV N G ++
Sbjct: 60 CVASNSAGTVSASV 73
Score = 32.5 bits (73), Expect = 0.026
Identities = 18/68 (26%), Positives = 24/68 (35%), Gaps = 4/68 (5%)
Query: 117 VNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAY---SPNSELDYGTLI 173
V ++C PP +W N +V GT S + S + D GT
Sbjct: 1 VTLTCLAS-GPPPPTITWLKNGKPLPSSVLTRVRSSRGTSSGSSTLTISNVTLEDSGTYT 59
Query: 174 CWGSNKIG 181
C SN G
Sbjct: 60 CVASNSAG 67
>gnl|CDD|206066 pfam13895, Ig_2, Immunoglobulin domain. This domain contains
immunoglobulin-like domains.
Length = 80
Score = 36.3 bits (84), Expect = 0.001
Identities = 21/87 (24%), Positives = 28/87 (32%), Gaps = 13/87 (14%)
Query: 11 SLNPDHIKEDSDVYFDCDIVAVPPVYKVEWRHNNKTL--HHNIAQGIIMTNQSLVLQRVN 68
+ +P + E DV C P W + L N V+
Sbjct: 5 TPSPTVVFEGEDVTLTCSAPG-NPPPNYTWYKDGVPLSSSQNG----------FFTPNVS 53
Query: 69 RQSAGNYTCVGFNIEGDGESNAFFLNV 95
+ +G YTCV N G SN L V
Sbjct: 54 AEDSGTYTCVASNGGGGKTSNPVTLTV 80
Score = 26.2 bits (58), Expect = 4.8
Identities = 8/30 (26%), Positives = 13/30 (43%), Gaps = 1/30 (3%)
Query: 111 VARQEKVNISCEVDANPPDVKFSWTFNNSA 140
V E V ++C NPP ++W +
Sbjct: 11 VFEGEDVTLTCSAPGNPP-PNYTWYKDGVP 39
>gnl|CDD|215677 pfam00047, ig, Immunoglobulin domain. Members of the
immunoglobulin superfamily are found in hundreds of
proteins of different functions. Examples include
antibodies, the giant muscle kinase titin and receptor
tyrosine kinases. Immunoglobulin-like domains may be
involved in protein-protein and protein-ligand
interactions. The Pfam alignments do not include the
first and last strand of the immunoglobulin-like
domain.
Length = 62
Score = 35.2 bits (81), Expect = 0.002
Identities = 15/56 (26%), Positives = 21/56 (37%), Gaps = 4/56 (7%)
Query: 27 CDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQ---SLVLQRVNRQSAGNYTCVG 79
C + P V V W K L + G +L + V + +G YTCV
Sbjct: 8 CSVSGPPQVD-VTWFKEGKGLEESTTVGTDENRVSSITLTISNVTPEDSGTYTCVV 62
Score = 32.5 bits (74), Expect = 0.016
Identities = 15/65 (23%), Positives = 23/65 (35%), Gaps = 7/65 (10%)
Query: 115 EKVNISCEVDANPPDVKFSWTFNNSA---ETVNVAQAHILRSGTLSVVAYSPNSELDYGT 171
V ++C V P V +W T + + S TL++ +P D GT
Sbjct: 2 SSVTLTCSVSGPPQ-VDVTWFKEGKGLEESTTVGTDENRVSSITLTISNVTPE---DSGT 57
Query: 172 LICWG 176
C
Sbjct: 58 YTCVV 62
>gnl|CDD|222457 pfam13927, Ig_3, Immunoglobulin domain. This family contains
immunoglobulin-like domains.
Length = 74
Score = 35.4 bits (81), Expect = 0.002
Identities = 16/64 (25%), Positives = 24/64 (37%), Gaps = 5/64 (7%)
Query: 115 EKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSELDYGTLIC 174
V ++C + PP SW N S + TL++ + + D GT C
Sbjct: 16 GGVTLTCSAEGGPPPPTISWYRNGSISGGSGGLGSS--GSTLTLSSVTSE---DSGTYTC 70
Query: 175 WGSN 178
SN
Sbjct: 71 VASN 74
Score = 31.6 bits (71), Expect = 0.045
Identities = 15/55 (27%), Positives = 22/55 (40%), Gaps = 2/55 (3%)
Query: 27 CDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVGFN 81
C PP + W N + G+ + +L L V + +G YTCV N
Sbjct: 22 CSAEGGPPPPTISWYRNGS--ISGGSGGLGSSGSTLTLSSVTSEDSGTYTCVASN 74
>gnl|CDD|143168 cd04967, Ig1_Contactin, First Ig domain of contactin.
Ig1_Contactin: First Ig domain of contactins. Contactins
are neural cell adhesion molecules and are comprised of
six Ig domains followed by four fibronectin type
III(FnIII) domains anchored to the membrane by
glycosylphosphatidylinositol. The first four Ig domains
form the intermolecular binding fragment, which arranges
as a compact U-shaped module via contacts between Ig
domains 1 and 4, and between Ig domains 2 and 3.
Contactin-2 (TAG-1, axonin-1) may play a part in the
neuronal processes of neurite outgrowth, axon guidance
and fasciculation, and neuronal migration. This group
also includes contactin-1 and contactin-5. The different
contactins show different expression patterns in the
central nervous system. During development and in
adulthood, contactin-2 is transiently expressed in
subsets of central and peripheral neurons. Contactin-5
is expressed specifically in the rat postnatal nervous
system, peaking at about 3 weeks postnatal, and a lack
of contactin-5 (NB-2) results in an impairment of
neuronal activity in the rat auditory system.
Contactin-5 is highly expressed in the adult human brain
in the occipital lobe and in the amygdala. Contactin-1
is differentially expressed in tumor tissues and may,
through a RhoA mechanism, facilitate invasion and
metastasis of human lung adenocarcinoma.
Length = 91
Score = 34.7 bits (80), Expect = 0.005
Identities = 18/68 (26%), Positives = 29/68 (42%), Gaps = 3/68 (4%)
Query: 114 QEKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSELDYGTLI 173
+ KV+++C +PP + W N + + L G L V +P+ D G
Sbjct: 19 EGKVSLNCRARGSPPPT-YRWLMNGTEIDDEPDSRYSLVGGNL--VISNPSKAKDAGRYQ 75
Query: 174 CWGSNKIG 181
C SN +G
Sbjct: 76 CLASNIVG 83
>gnl|CDD|143180 cd04979, Ig_Semaphorin_C, Immunoglobulin (Ig)-like domain of
semaphorin. Ig_Semaphorin_C; Immunoglobulin (Ig)-like
domain in semaphorins. Semaphorins are transmembrane
protein that have important roles in a variety of
tissues. Functionally, semaphorins were initially
characterized for their importance in the development
of the nervous system and in axonal guidance. Later
they have been found to be important for the formation
and functioning of the cardiovascular, endocrine,
gastrointestinal, hepatic, immune, musculoskeletal,
renal, reproductive, and respiratory systems.
Semaphorins function through binding to their receptors
and transmembrane semaphorins also serves as receptors
themselves. Although molecular mechanism of semaphorins
is poorly understood, the Ig-like domains may involve
in ligand binding or dimerization.
Length = 89
Score = 34.7 bits (80), Expect = 0.006
Identities = 11/44 (25%), Positives = 18/44 (40%), Gaps = 2/44 (4%)
Query: 37 KVEWRHNNKTLHHNIAQG--IIMTNQSLVLQRVNRQSAGNYTCV 78
V W L +++T L+++ V+ AG YTC
Sbjct: 26 SVVWLFQGGPLQRKEEPEERLLVTEDGLLIRSVSPADAGVYTCQ 69
>gnl|CDD|143221 cd05744, Ig_Myotilin_C_like, Immunoglobulin (Ig)-like domain of
myotilin, palladin, and myopalladin.
Ig_Myotilin_like_C: immunoglobulin (Ig)-like domain in
myotilin, palladin, and myopalladin. Myotilin,
palladin, and myopalladin function as scaffolds that
regulate actin organization. Myotilin and myopalladin
are most abundant in skeletal and cardiac muscle;
palladin is ubiquitously expressed in the organs of
developing vertebrates and plays a key role in
cellular morphogenesis. The three family members each
interact with specific molecular partners: all three
bind to alpha-actinin; in addition, palladin also binds
to vasodilator-stimulated phosphoprotein (VASP) and
ezrin, myotilin binds to filamin and actin, and
myopalladin also binds to nebulin and cardiac ankyrin
repeat protein (CARP).
Length = 75
Score = 33.6 bits (77), Expect = 0.010
Identities = 21/72 (29%), Positives = 36/72 (50%), Gaps = 5/72 (6%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQS----LVLQRVNRQSAGNYTCV 78
V +C + A+PP ++ W+ NN+ L +N + + + L++Q N++ AG YT
Sbjct: 1 VRLECRVSAIPPP-QIFWKKNNEMLTYNTDRISLYQDNCGRICLLIQNANKEDAGWYTVS 59
Query: 79 GFNIEGDGESNA 90
N G NA
Sbjct: 60 AVNEAGVVSCNA 71
>gnl|CDD|143300 cd05892, Ig_Myotilin_C, C-terminal immunoglobulin (Ig)-like
domain of myotilin. Ig_Myotilin_C: C-terminal
immunoglobulin (Ig)-like domain of myotilin. Mytolin
belongs to the palladin-myotilin-myopalladin family.
Proteins belonging to the latter family contain
multiple Ig-like domains and function as scaffolds,
modulating actin cytoskeleton. Myotilin is most
abundant in skeletal and cardiac muscle, and is
involved in maintaining sarcomere integrity. It binds
to alpha-actinin, filamin and actin. Mutations in
myotilin lead to muscle disorders.
Length = 75
Score = 33.0 bits (75), Expect = 0.017
Identities = 22/72 (30%), Positives = 38/72 (52%), Gaps = 5/72 (6%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQS----LVLQRVNRQSAGNYTCV 78
V +C I A+PP K+ W+ NN+ + +N + + + S L+++ VN++ AG YT
Sbjct: 1 VKLECQISAIPPP-KIFWKRNNEMVQYNTDRISLYQDNSGRVTLLIKNVNKKDAGWYTVS 59
Query: 79 GFNIEGDGESNA 90
N G +A
Sbjct: 60 AVNEAGVATCHA 71
>gnl|CDD|143231 cd05754, Ig3_Perlecan_like, Third immunoglobulin (Ig)-like domain
found in Perlecan and similar proteins.
Ig3_Perlecan_like: domain similar to the third
immunoglobulin (Ig)-like domain found in Perlecan.
Perlecan is a large multi-domain heparin sulfate
proteoglycan, important in tissue development and
organogenesis. Perlecan can be represented as 5 major
portions; its fourth major portion (domain IV) is a
tandem repeat of immunoglobulin-like domains
(Ig2-Ig15), which can vary in size due to alternative
splicing. Perlecan binds many cellular and
extracellular ligands. Its domain IV region has many
binding sites. Some of these have been mapped at the
level of individual Ig-like domains, including a site
restricted to the Ig5 domain for heparin/sulfatide, a
site restricted to the Ig3 domain for nidogen-1 and
nidogen-2, a site restricted to Ig4-5 for fibronectin,
and sites restricted to Ig2 and to Ig13-15 for
fibulin-2.
Length = 85
Score = 32.9 bits (75), Expect = 0.020
Identities = 19/74 (25%), Positives = 28/74 (37%), Gaps = 4/74 (5%)
Query: 17 IKEDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYT 76
++ +DV F C + P Y + W L N L ++ V AG Y
Sbjct: 13 VRPGADVSFICRAKSKSPAYTLVWTRVGGGLPSRAMD----FNGILTIRNVQLSDAGTYV 68
Query: 77 CVGFNIEGDGESNA 90
C G N+ E+ A
Sbjct: 69 CTGSNMLDTDEATA 82
>gnl|CDD|143202 cd05725, Ig3_Robo, Third immunoglobulin (Ig)-like domain in Robo
(roundabout) receptors. Ig3_Robo: domain similar to
the third immunoglobulin (Ig)-like domain in Robo
(roundabout) receptors. Robo receptors play a role in
the development of the central nervous system (CNS),
and are receptors of Slit protein. Slit is a repellant
secreted by the neural cells in the midline. Slit acts
through Robo to prevent most neurons from crossing the
midline from either side. Three mammalian Robo homologs
(robo1, -2, and -3), and three mammalian Slit homologs
(Slit-1,-2, -3), have been identified. Commissural
axons, which cross the midline, express low levels of
Robo; longitudinal axons, which avoid the midline,
express high levels of Robo. robo1, -2, and -3 are
expressed by commissural neurons in the vertebrate
spinal cord and Slits 1, -2, -3 are expressed at the
ventral midline. Robo-3 is a divergent member of the
Robo family which instead of being a positive regulator
of slit responsiveness, antagonizes slit responsiveness
in precrossing axons. The Slit-Robo interaction is
mediated by the second leucine-rich repeat (LRR) domain
of Slit and the two N-terminal Ig domains of Robo, Ig1
and Ig2. The primary Robo binding site for Slit2 has
been shown by surface plasmon resonance experiments and
mutational analysis to be is the Ig1 domain, while the
Ig2 domain has been proposed to harbor a weak secondary
binding site.
Length = 69
Score = 32.4 bits (74), Expect = 0.022
Identities = 23/68 (33%), Positives = 35/68 (51%), Gaps = 3/68 (4%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVGFNI 82
V F C+ V PV V WR + L A+ I+ ++SL ++ V G+YTC N+
Sbjct: 1 VEFQCE-VGGDPVPTVLWRKEDGELPKGRAE--ILDDKSLKIRNVTAGDEGSYTCEAENM 57
Query: 83 EGDGESNA 90
G E++A
Sbjct: 58 VGKIEASA 65
>gnl|CDD|143258 cd05850, Ig1_Contactin-2, First Ig domain of contactin-2.
Ig1_Contactin-2: First Ig domain of the neural cell
adhesion molecule contactin-2-like. Contactins are
comprised of six Ig domains followed by four fibronectin
type III (FnIII) domains anchored to the membrane by
glycosylphosphatidylinositol. Contactin-2 (TAG-1,
axonin-1) facilitates cell adhesion by homophilic
binding between molecules in apposed membranes. It may
play a part in the neuronal processes of neurite
outgrowth, axon guidance and fasciculation, and neuronal
migration. The first four Ig domains form the
intermolecular binding fragment, which arranges as a
compact U-shaped module by contacts between IG domains 1
and 4, and domains 2 and 3. The different contactins
show different expression patterns in the central
nervous system. During development and in adulthood,
contactin-2 is transiently expressed in subsets of
central and peripheral neurons. Contactin-2 is also
expressed in retinal amacrine cells in the developing
chick retina, corresponding to the period of formation
and maturation of AC processes.
Length = 94
Score = 32.2 bits (73), Expect = 0.041
Identities = 19/68 (27%), Positives = 29/68 (42%), Gaps = 3/68 (4%)
Query: 114 QEKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSELDYGTLI 173
+EKV + C A+PP + W N + + L +G L V +P D G+
Sbjct: 19 EEKVTLGCRARASPPAT-YRWKMNGTEIKFAPESRYTLVAGNL--VINNPQKARDAGSYQ 75
Query: 174 CWGSNKIG 181
C N+ G
Sbjct: 76 CLAINRCG 83
>gnl|CDD|143279 cd05871, Ig_Semaphorin_classIII, Immunoglobulin (Ig)-like domain
of class III semaphorin. Ig_Semaphorin_class III;
Immunoglobulin (Ig)-like domain of class III
semaphorins. Semaphorins are classified into various
classes on the basis of structural features additional
to the Sema domain. Class III semaphorins are a
vertebrate class having a Sema domain, an Ig domain, a
short basic domain, and are secreted. They have been
shown to be axonal guidance cues and have a part in the
regulation of the cardiovascular, immune and
respiratory systems. Sema3A, the prototype member of
this class III subfamily, induces growth cone collapse
and is an inhibitor of axonal sprouting. In perinatal
rat cortex as a chemoattractant, it functions to
direct, for pyramidal neurons, the orientated extension
of apical dendrites. It may play a role, prior to the
development of apical dendrites, in signaling the
radial migration of newborn cortical neurons towards
the upper layers. Sema3A selectively inhibits vascular
endothelial growth factor receptor (VEGF)-induced
angiogenesis and induces microvascular permeability.
This group also includes Sema3B, -C, -D, -E, -G.
Length = 91
Score = 31.6 bits (72), Expect = 0.068
Identities = 10/26 (38%), Positives = 15/26 (57%)
Query: 55 IIMTNQSLVLQRVNRQSAGNYTCVGF 80
+I T + L+L+ + R AG YTC
Sbjct: 48 LIHTERGLLLRSLQRSDAGVYTCTAV 73
>gnl|CDD|222964 PHA03042, PHA03042, CD47-like protein; Provisional.
Length = 286
Score = 33.2 bits (76), Expect = 0.074
Identities = 16/69 (23%), Positives = 27/69 (39%), Gaps = 15/69 (21%)
Query: 20 DSDVYFDCDIVAVPPVYK------VEWRHNNKT-LHHNIAQGIIMTNQSLVLQRVNRQSA 72
+ + C++ +Y + W+ NNK N TN S + ++ +
Sbjct: 31 NKTIVIVCNLNL--LIYYNISNIHINWKFNNKVIFKKNN------TNTSSLKFNFSKNLS 82
Query: 73 GNYTCVGFN 81
GNYTC N
Sbjct: 83 GNYTCEAIN 91
>gnl|CDD|143256 cd05848, Ig1_Contactin-5, First Ig domain of contactin-5.
Ig1_Contactin-5: First Ig domain of the neural cell
adhesion molecule contactin-5. Contactins are comprised
of six Ig domains followed by four fibronectin type III
(FnIII) domains, anchored to the membrane by
glycosylphosphatidylinositol. The different contactins
show different expression patterns in the central
nervous system. In rats, a lack of contactin-5 (NB-2)
results in an impairment of the neuronal activity in the
auditory system. Contactin-5 is expressed specifically
in the postnatal nervous system, peaking at about 3
weeks postnatal. Contactin-5 is highly expressed in the
adult human brain in the occipital lobe and in the
amygdala; lower levels of expression have been detected
in the corpus callosum, caudate nucleus, and spinal
cord.
Length = 94
Score = 31.4 bits (71), Expect = 0.087
Identities = 18/68 (26%), Positives = 29/68 (42%), Gaps = 3/68 (4%)
Query: 114 QEKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSELDYGTLI 173
++KV ++CE NP + W N + + L G L + +P+ D G
Sbjct: 19 EKKVILNCEARGNPVPT-YRWLRNGTEIDTESDYRYSLIDGNL--IISNPSEVKDSGRYQ 75
Query: 174 CWGSNKIG 181
C +N IG
Sbjct: 76 CLATNSIG 83
>gnl|CDD|143176 cd04975, Ig4_SCFR_like, Fourth immunoglobulin (Ig)-like domain of
stem cell factor receptor (SCFR) and similar proteins.
Ig4_SCFR_like; fourth immunoglobulin (Ig)-like domain of
stem cell factor receptor (SCFR). In addition to SCFR
this group also includes the fourth Ig domain of
platelet-derived growth factor receptors (PDGFR), alpha
and beta, the fourth Ig domain of macrophage colony
stimulating factor (M-CSF), and the Ig domain of the
receptor tyrosine kinase KIT. SCFR and the PDGFR alpha
and beta have similar organization: an extracellular
component having five Ig-like domains, a transmembrane
segment, and a cytoplasmic portion having protein
tyrosine kinase activity. SCFR and its ligand SCF are
critical for normal hematopoiesis, mast cell
development, melanocytes and gametogenesis. SCF binds to
the second and third Ig-like domains of SCFR, this
fourth Ig-like domain participates in SCFR dimerization,
which follows ligand binding. Deletion of this fourth
SCFR_Ig-like domain abolishes the ligand-induced
dimerization of SCFR and completely inhibits signal
transduction. PDGF is a potent mitogen for connective
tissue cells. PDGF-stimulated processes are mediated by
three different PDGFs (PDGF-A,-B, and C). PDGFR alpha
binds to all three PDGFs, whereas the PDGFR beta, binds
only to PDGF-B. In mice, PDGFR alpha, and PDGFR beta,
are essential for normal development.
Length = 101
Score = 30.0 bits (68), Expect = 0.25
Identities = 18/54 (33%), Positives = 26/54 (48%), Gaps = 4/54 (7%)
Query: 114 QEKVNISCEVDANPPDVKFSWTFNNSAETVNVAQAHILRSGTLSVVAYSPNSEL 167
E +N+ EV+A PP +WT++N T+ I+ S S Y SEL
Sbjct: 18 GENLNLVVEVEAYPPPPHINWTYDN--RTLTNKLTEIVTSENESEYRY--VSEL 67
>gnl|CDD|143206 cd05729, Ig2_FGFR_like, Second immunoglobulin (Ig)-like domain of
fibroblast growth factor (FGF) receptor and similar
proteins. Ig2_FGFR_like: domain similar to the second
immunoglobulin (Ig)-like domain of fibroblast growth
factor (FGF) receptor. FGF receptors bind FGF signaling
polypeptides. FGFs participate in multiple processes
such as morphogenesis, development, and angiogenesis.
FGFs bind to four FGF receptor tyrosine kinases (FGFR1,
-2, -3, -4). Receptor diversity is controlled by
alternative splicing producing splice variants with
different ligand binding characteristics and different
expression patterns. FGFRs have an extracellular region
comprised of three Ig-like domains, a single
transmembrane helix, and an intracellular tyrosine
kinase domain. Ligand binding and specificity reside in
the Ig-like domains 2 and 3, and the linker region that
connects these two. FGFR activation and signaling
depend on FGF-induced dimerization, a process involving
cell surface heparin or heparin sulfate proteoglycans.
This group also contains fibroblast growth factor (FGF)
receptor_like-1(FGFRL1). FGFRL1 does not have a protein
tyrosine kinase domain at its C terminus; neither does
its cytoplasmic domain appear to interact with a
signaling partner. It has been suggested that FGFRL1
may not have any direct signaling function, but instead
acts as a decoy receptor trapping FGFs and preventing
them from binding other receptors.
Length = 85
Score = 29.7 bits (67), Expect = 0.31
Identities = 15/64 (23%), Positives = 23/64 (35%), Gaps = 4/64 (6%)
Query: 21 SDVYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGII---MTNQSLVLQRVNRQSAGNYTC 77
S V C + P + W + K G +L+L+ V +G YTC
Sbjct: 10 STVRLKC-PASGNPRPTITWLKDGKPFKKEHRIGGYKVRKKKWTLILESVVPSDSGKYTC 68
Query: 78 VGFN 81
+ N
Sbjct: 69 IVEN 72
>gnl|CDD|143211 cd05734, Ig7_DSCAM, Seventh immunoglobulin (Ig)-like domain of
Down Syndrome Cell Adhesion molecule (DSCAM).
Ig7_DSCAM: the seventh immunoglobulin (Ig)-like domain
of Down Syndrome Cell Adhesion molecule (DSCAM). DSCAM
is a cell adhesion molecule expressed largely in the
developing nervous system. The gene encoding DSCAM is
located at human chromosome 21q22, the locus associated
with the mental retardation phenotype of Down Syndrome.
DSCAM is predicted to be the largest member of the IG
superfamily. It has been demonstrated that DSCAM can
mediate cation-independent homophilic intercellular
adhesion.
Length = 79
Score = 29.1 bits (65), Expect = 0.45
Identities = 19/80 (23%), Positives = 33/80 (41%), Gaps = 8/80 (10%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHN-------IAQGIIMTNQSLVLQRVNRQSAGNY 75
V +C PP + W+H+ H + +++N SL+++ V + +G Y
Sbjct: 1 VTLNCSAEGYPPP-TIVWKHSKGRGHPQHTHTCCLAGRIQLLSNGSLLIKHVLEEDSGYY 59
Query: 76 TCVGFNIEGDGESNAFFLNV 95
C N G S + L V
Sbjct: 60 LCKVSNDVGADASKSMVLTV 79
>gnl|CDD|143265 cd05857, Ig2_FGFR, Second immunoglobulin (Ig)-like domain of
fibroblast growth factor (FGF) receptor. Ig2_FGFR:
second immunoglobulin (Ig)-like domain of fibroblast
growth factor (FGF) receptor. FGF receptors bind FGF
signaling polypeptides. FGFs participate in multiple
processes such as morphogenesis, development, and
angiogenesis. FGFs bind to four FGF receptor tyrosine
kinases (FGFR1, -2, -3, -4). Receptor diversity is
controlled by alternative splicing producing splice
variants with different ligand binding characteristics
and different expression patterns. FGFRs have an
extracellular region comprised of three IG-like
domains, a single transmembrane helix, and an
intracellular tyrosine kinase domain. Ligand binding
and specificity reside in the Ig-like domains 2 and 3,
and the linker region that connects these two. FGFR
activation and signaling depend on FGF-induced
dimerization, a process involving cell surface heparin
or heparin sulfate proteoglycans.
Length = 85
Score = 28.7 bits (64), Expect = 0.56
Identities = 19/65 (29%), Positives = 25/65 (38%), Gaps = 4/65 (6%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQG---IIMTNQSLVLQRVNRQSAGNYTCVG 79
V F C P + W N K G + + SL+++ V GNYTCV
Sbjct: 12 VKFRCPAAGNPTP-TMRWLKNGKEFKQEHRIGGYKVRNQHWSLIMESVVPSDKGNYTCVV 70
Query: 80 FNIEG 84
N G
Sbjct: 71 ENEYG 75
>gnl|CDD|143267 cd05859, Ig4_PDGFR-alpha, Fourth immunoglobulin (Ig)-like domain
of platelet-derived growth factor receptor (PDGFR)
alpha. IG4_PDGFR-alpha: The fourth immunoglobulin
(Ig)-like domain of platelet-derived growth factor
receptor (PDGFR) alpha. PDGF is a potent mitogen for
connective tissue cells. PDGF-stimulated processes are
mediated by three different PDGFs (PDGF-A,-B, and C).
PDGFR alpha binds to all three PDGFs, whereas the PDGFR
beta (not included in this group) binds only to PDGF-B.
PDGF alpha is organized as an extracellular component
having five Ig-like domains, a transmembrane segment,
and a cytoplasmic portion having protein tyrosine
kinase activity. In mice, PDGFR alpha and PDGFR beta
are essential for normal development.
Length = 101
Score = 28.7 bits (64), Expect = 0.72
Identities = 20/81 (24%), Positives = 34/81 (41%), Gaps = 10/81 (12%)
Query: 23 VYFDCDIVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQS--------LVLQRVNRQSAGN 74
F ++ A PP ++ W +N+TL N+ + + L L R + +G
Sbjct: 21 KEFVVEVEAYPPP-QIRWLKDNRTLIENLTEITTSEHNVQETRYVSKLKLIRAKEEDSGL 79
Query: 75 YTCVGFNIEGDGESNAFFLNV 95
YT + N E +S F L +
Sbjct: 80 YTALAQN-EDAVKSYTFALQI 99
>gnl|CDD|143179 cd04978, Ig4_L1-NrCAM_like, Fourth immunoglobulin (Ig)-like
domain of L1, Ng-CAM (Neuron-glia CAM cell adhesion
molecule), and NrCAM (Ng-CAM-related).
Ig4_L1-NrCAM_like: fourth immunoglobulin (Ig)-like
domain of L1, Ng-CAM (Neuron-glia CAM cell adhesion
molecule), and NrCAM (Ng-CAM-related). These proteins
belong to the L1 subfamily of cell adhesion molecules
(CAMs) and are comprised of an extracellular region
having six Ig-like domains and five fibronectin type
III domains, a transmembrane region and an
intracellular domain. These molecules are primarily
expressed in the nervous system. L1 is associated with
an X-linked recessive disorder, X-linked hydrocephalus,
MASA syndrome, or spastic paraplegia type 1, that
involves abnormalities of axonal growth.
Length = 76
Score = 28.1 bits (63), Expect = 0.94
Identities = 18/77 (23%), Positives = 29/77 (37%), Gaps = 5/77 (6%)
Query: 21 SDVYFDCDIVAVP-PVYKVEWRHNNKTLH-HNIAQGIIMTNQSLVLQRVNRQSAGNYTCV 78
DC+ +P P + WR N + + +L+L V Y C
Sbjct: 2 ETGRLDCEAEGIPQPT--ITWRLNGVPIEELPPDPRRRVDGGTLILSNVQPNDTAVYQCN 59
Query: 79 GFNIEGDGESNAFFLNV 95
N+ G +NA F++V
Sbjct: 60 ASNVHGYLLANA-FVHV 75
>gnl|CDD|143271 cd05863, Ig2_VEGFR-3, Second immunoglobulin (Ig)-like domain of
vascular endothelial growth factor receptor 3
(VEGFR-3). Ig2_VEGFR-3: Second immunoglobulin
(Ig)-like domain of vascular endothelial growth factor
receptor 3 (VEGFR-3). The VEGFRs have an extracellular
component with seven Ig-like domains, a transmembrane
segment, and an intracellular tyrosine kinase domain
interrupted by a kinase-insert domain. VEGFRs bind
VEGFs with high affinity at the Ig-like domains.
VEGFR-3 (Flt-4) binds two members of the VEGF family
(VEGF-C and -D) and is involved in tumor angiogenesis
and growth.
Length = 67
Score = 27.2 bits (60), Expect = 1.6
Identities = 16/53 (30%), Positives = 25/53 (47%), Gaps = 7/53 (13%)
Query: 29 IVAVPPVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVGFN 81
+ A PP + +W + K + +Q SL ++ V SAG YT V +N
Sbjct: 7 VAAYPPP-EFQWYKDGKLISGKHSQ------HSLQIKDVTEASAGTYTLVLWN 52
>gnl|CDD|143169 cd04968, Ig3_Contactin_like, Third Ig domain of contactin.
Ig3_Contactin_like: Third Ig domain of contactins.
Contactins are neural cell adhesion molecules and are
comprised of six Ig domains followed by four
fibronectin type III(FnIII) domains anchored to the
membrane by glycosylphosphatidylinositol. The first
four Ig domains form the intermolecular binding
fragment, which arranges as a compact U-shaped module
via contacts between Ig domains 1 and 4, and between Ig
domains 2 and 3. Contactin-2 (TAG-1, axonin-1) may play
a part in the neuronal processes of neurite outgrowth,
axon guidance and fasciculation, and neuronal
migration. This group also includes contactin-1 and
contactin-5. The different contactins show different
expression patterns in the central nervous system.
During development and in adulthood, contactin-2 is
transiently expressed in subsets of central and
peripheral neurons. Contactin-5 is expressed
specifically in the rat postnatal nervous system,
peaking at about 3 weeks postnatal, and a lack of
contactin-5 (NB-2) results in an impairment of neuronal
act ivity in the rat auditory system. Contactin-5 is
highly expressed in the adult human brain in the
occipital lobe and in the amygdala. Contactin-1 is
differentially expressed in tumor tissues and may,
through a RhoA mechanism, facilitate invasion and
metastasis of human lung adenocarcinoma.
Length = 88
Score = 27.1 bits (60), Expect = 2.7
Identities = 14/52 (26%), Positives = 23/52 (44%), Gaps = 4/52 (7%)
Query: 34 PVYKVEWRHNNKTLHHNIAQGII-MTNQSLVLQRVNRQSAGNYTCVGFNIEG 84
PV +++WR K + I M+ L + + + G Y C NI+G
Sbjct: 29 PVPQIKWR---KVDGSMPSSAEISMSGAVLKIPNIQFEDEGTYECEAENIKG 77
>gnl|CDD|143235 cd05758, Ig5_KIRREL3-like, Fifth immunoglobulin (Ig)-like domain of
Kirrel (kin of irregular chiasm-like) 3 (also known as
Neph2) and similar proteins. Ig5_KIRREL3-like: domain
similar to the fifth immunoglobulin (Ig)-like domain of
Kirrel (kin of irregular chiasm-like) 3 (also known as
Neph2). This protein has five Ig-like domains, one
transmembrane domain, and a cytoplasmic tail. Included
in this group is mammalian Kirrel (Neph1), Kirrel2
(Neph3), and Drosophila RST (irregular chiasm
C-roughest) protein. These proteins contain multiple Ig
domains, have properties of cell adhesion molecules, and
are important in organ development.
Length = 98
Score = 27.0 bits (60), Expect = 2.8
Identities = 10/38 (26%), Positives = 18/38 (47%), Gaps = 4/38 (10%)
Query: 100 TCKPHQQRVLGVARQEKVNISCEVDANPPDVKFSWTFN 137
T + Q +LG +K + C + + PP + WT+
Sbjct: 6 TSEATQYAILG----DKGRVECFIFSTPPPDRIVWTWK 39
>gnl|CDD|165230 PHA02914, PHA02914, Immunoglobulin-like domain protein;
Provisional.
Length = 500
Score = 28.1 bits (62), Expect = 3.4
Identities = 13/66 (19%), Positives = 26/66 (39%), Gaps = 2/66 (3%)
Query: 34 PVYKVEWRHNNKTLHHNIAQGIIMTNQSLVLQRVNRQSAGNYTCVGFNIEGDGESNAFFL 93
++E NN + G S + + + G++ C+ + GD ES+ +
Sbjct: 55 NTKEIESSINNAGEDNVCYCGDPDKEYSFIEENIGEHEDGDFKCIFY--LGDNESHKHEI 112
Query: 94 NVMYSP 99
V +P
Sbjct: 113 LVRKAP 118
>gnl|CDD|143251 cd05774, Ig_CEACAM_D1, First immunoglobulin (Ig)-like domain of
carcinoembryonic antigen (CEA) related cell adhesion
molecule (CEACAM). IG_CEACAM_D1: immunoglobulin
(Ig)-like domain 1 in carcinoembryonic antigen (CEA)
related cell adhesion molecule (CEACAM) protein
subfamily. The CEA family is a group of anchored or
secreted glycoproteins, expressed by epithelial cells,
leukocytes, endothelial cells and placenta. The CEA
family is divided into the CEACAM and
pregnancy-specific glycoprotein (PSG) subfamilies. This
group represents the CEACAM subfamily. CEACAM1 has many
important cellular functions, it is a cell adhesion
molecule, and a signaling molecule that regulates the
growth of tumor cells, it is an angiogenic factor, and
is a receptor for bacterial and viral pathogens,
including mouse hepatitis virus (MHV). In mice, four
isoforms of CEACAM1 generated by alternative splicing
have either two [D1, D4] or four [D1-D4] Ig-like
domains on the cell surface. This family corresponds to
the D1 Ig-like domain.
Length = 105
Score = 26.9 bits (60), Expect = 4.3
Identities = 9/22 (40%), Positives = 13/22 (59%)
Query: 55 IIMTNQSLVLQRVNRQSAGNYT 76
I N SL++Q V ++ G YT
Sbjct: 65 TIYPNGSLLIQNVTQKDTGFYT 86
>gnl|CDD|188093 TIGR00864, PCC, polycystin cation channel protein. The Polycystin
Cation Channel (PCC) Family (TC 1.A.5) Polycystin is a
huge protein of 4303aas. Its repeated leucine-rich (LRR)
segment is found in many proteins. It contains 16
polycystic kidney disease (PKD) domains, one LDL-receptor
class A domain, one C-type lectin family domain, and
16-18 putative TMSs in positions between residues 2200
and 4100. Polycystin-L has been shown to be a cation
(Na+, K+ and Ca2+) channel that is activated by Ca2+. Two
members of the PCC family (polycystin 1 and 2) are
mutated in autosomal dominant polycystic kidney disease,
and polycystin-L is deleted in mice with renal and
retinal defects. Note: this model is restricted to the
amino half for technical reasons.
Length = 2740
Score = 27.4 bits (60), Expect = 7.0
Identities = 17/71 (23%), Positives = 27/71 (38%), Gaps = 7/71 (9%)
Query: 111 VARQEKVNISCEVDANPPDVKFSWTFNN--SAETV--NVAQAHILR-SGT--LSVVAYSP 163
+ N V N F W+F + ET +H R +GT L++ S
Sbjct: 1266 IGEHADANFRARVSGNAAHYLFDWSFGDGSPNETHHGCPGISHNFRGNGTFPLALTISSG 1325
Query: 164 NSELDYGTLIC 174
++ + T IC
Sbjct: 1326 VNKAHFFTQIC 1336
>gnl|CDD|217433 pfam03223, V-ATPase_C, V-ATPase subunit C.
Length = 371
Score = 26.8 bits (60), Expect = 8.5
Identities = 13/46 (28%), Positives = 21/46 (45%), Gaps = 5/46 (10%)
Query: 10 RSLN----PDHIKEDSDVYFDCDIVAVPPVYKVEWRHNNKTLHHNI 51
RSL P+ DS+ Y +VAVP ++ + +TL +
Sbjct: 164 RSLADIVKPEDFVLDSE-YLTTVLVAVPKNSVKDFLASYETLSDMV 208
>gnl|CDD|177253 MTH00210, ND5, NADH dehydrogenase subunit 5; Provisional.
Length = 616
Score = 26.9 bits (60), Expect = 8.6
Identities = 15/39 (38%), Positives = 21/39 (53%), Gaps = 5/39 (12%)
Query: 140 AETVNVAQAHILRSGTLSVVAYSPNSELDYGTLICWGSN 178
A TV V Q + + V+AYS S+L Y ++C SN
Sbjct: 289 AATVGVVQNDLKK-----VIAYSTCSQLGYMVMVCGISN 322
>gnl|CDD|203711 pfam07654, C1-set, Immunoglobulin C1-set domain.
Length = 83
Score = 25.3 bits (56), Expect = 8.8
Identities = 13/48 (27%), Positives = 20/48 (41%), Gaps = 5/48 (10%)
Query: 127 PPDVKFSWTFNNSAETVNVAQAHILRSG-----TLSVVAYSPNSELDY 169
PPD+ +W N T V L +G S + ++P S +Y
Sbjct: 22 PPDITVTWLKNGQEVTEGVESTEELPNGDGTYQLSSYLTFTPESGDEY 69
>gnl|CDD|199869 cd06248, M14_CP_A-B_like_1, Peptidase M14 carboxypeptidase
subfamily A/B-like; uncharacterized subgroup. The
Peptidase M14 Carboxypeptidase A/B-like subfamily is one
of two main M14 carboxypeptidase subfamilies, defined by
sequence and structural homology, the other being N/E.
Carboxypeptidases (CPs) hydrolyze single, C-terminal
amino acids from polypeptide chains. They have a
recognition site for the free C-terminal carboxyl group,
which is a key determinant of specificity. Majority of
the proteins in this subfamily have not been
characterized as yet. The A/B enzymes are normally
synthesized as inactive precursors containing preceding
signal peptide, followed by a globular N-terminal
pro-region linked to the enzyme; the proenzymes are
called procarboxypeptidases. These enzymes exhibit
distinct substrate specificity pattern; Carboxypeptidase
A-like (CPA-like) enzymes favor hydrophobic residues
while carboxypeptidase B-like (CPB-like) enzymes only
cleave the basic residues lysine or arginine. There are
nine members in the A/B family: CPA1, CPA2, CPA3, CPA4,
CPA5, CPA6, CPB, CPO and CPU. CPA1, CPA2 and CPB are
produced by the pancreas. The A forms have slightly
different specificities, with CPA1 preferring aliphatic
and small aromatic residues, and CPA2 preferring the
bulkier aromatic side chains. CPA3 is found in secretory
granules of mast cells and functions in inflammatory
processes. CPA4, detected in hormone-regulated tissues,
is thought to play a role in prostate cancer. CPA5 is
present in discrete regions of pituitary and other
tissues, and cleaves aliphatic C-terminal residues. CPA6
is highly expressed in embryonic brain and optic muscle,
suggesting that it may play a specific role in cell
migration and axonal guidance. CPU (also called CPB2) is
produced and secreted by the liver as the inactive
precursor PCPU, commonly referred to as
thrombin-activatable fibrinolysis inhibitor (TAFI).
Little is known about CPO but it has been suggested to
have specificity for acidic residues.
Length = 303
Score = 26.8 bits (60), Expect = 8.9
Identities = 8/19 (42%), Positives = 11/19 (57%)
Query: 64 LQRVNRQSAGNYTCVGFNI 82
L R NRQ +CVG ++
Sbjct: 119 LWRKNRQPTSGSSCVGTDL 137
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.320 0.134 0.419
Gapped
Lambda K H
0.267 0.0637 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 10,147,579
Number of extensions: 885529
Number of successful extensions: 647
Number of sequences better than 10.0: 1
Number of HSP's gapped: 640
Number of HSP's successfully gapped: 45
Length of query: 207
Length of database: 10,937,602
Length adjustment: 92
Effective length of query: 115
Effective length of database: 6,857,034
Effective search space: 788558910
Effective search space used: 788558910
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.8 bits)
S2: 57 (25.9 bits)