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Conserved domains on  [gi|157057547|ref|NP_001004310|]
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Fc receptor-like protein 6 isoform 1 precursor [Homo sapiens]

Protein Classification

immunoglobulin domain-containing protein( domain architecture ID 12944540)

immunoglobulin (Ig) domain-containing protein adopts a fold comprised of a sandwich of two beta sheets and may function in cell adhesion and pattern recognition

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
Ig2_FcgammaR_like cd05753
Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; ...
 19-105 1.37e-38

Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; The members here are composed of the second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs). Interactions between IgG and FcgammaR are important to the initiation of cellular and humoral response. IgG binding to FcgammaR leads to a cascade of signals and ultimately to functions such as antibody-dependent-cellular-cytotoxicity (ADCC), endocytosis, phagocytosis, release of inflammatory mediators, etc. FcgammaR has two Ig-like domains. This group also contains FcepsilonRI which binds IgE with high affinity.


:

Pssm-ID: 409411  Cd Length: 83  Bit Score: 133.97  E-value: 1.37e-38
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  19 WLYLQAWPNPVFEGDALTLRCQGWKNTPLSQVKFYRDGKFLHFSKENQTLSMGAATVQSRGQYSCSGQVMYipqtFTQTS 98
Cdd:cd05753    1 WLLLQAPSAVVFEGEPLTLRCHGWKDKKVHKVTYYKDGKALKFSYENSNFSIPQATLSDSGSYHCSGTVRI----KRRSS 76


                 ....*..
gi 157057547  99 ETAMVQV 105
Cdd:cd05753   77 ESVNITV 83
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
 206-280 4.61e-09

Immunoglobulin domain; This family contains immunoglobulin-like domains.


:

Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 52.95  E-value: 4.61e-09
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547  206 RPVLTLHHGPADPAVGDMVQLLCEAQRGSPPILYSFYLDEKIVGNHSAPC---GGTTSLLFPVKSEQDAGNYSCEAEN 280
Cdd:pfam13927   1 KPVITVSPSSVTVREGETVTLTCEATGSPPPTITWYKNGEPISSGSTRSRslsGSNSTLTISNVTRSDAGTYTCVASN 78
IG_like smart00410
Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.
 123-198 4.95e-05

Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.


:

Pssm-ID: 214653 [Multi-domain]  Cd Length: 85  Bit Score: 41.72  E-value: 4.95e-05
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547   123 REGSLVTLRCQTKLHP------LRSALRLLFsfHKDGHTLQDRGPHPELCIPGAKEGDSGLYWCEVAPEGGQVQKQSpQL 196
Cdd:smart00410   7 KEGESVTLSCEASGSPppevtwYKQGGKLLA--ESGRFSVSRSGSTSTLTISNVTPEDSGTYTCAATNSSGSASSGT-TL 83


                   ..
gi 157057547   197 EV 198
Cdd:smart00410  84 TV 85
 
Name Accession Description Interval E-value
Ig2_FcgammaR_like cd05753
Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; ...
 19-105 1.37e-38

Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; The members here are composed of the second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs). Interactions between IgG and FcgammaR are important to the initiation of cellular and humoral response. IgG binding to FcgammaR leads to a cascade of signals and ultimately to functions such as antibody-dependent-cellular-cytotoxicity (ADCC), endocytosis, phagocytosis, release of inflammatory mediators, etc. FcgammaR has two Ig-like domains. This group also contains FcepsilonRI which binds IgE with high affinity.


Pssm-ID: 409411  Cd Length: 83  Bit Score: 133.97  E-value: 1.37e-38
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  19 WLYLQAWPNPVFEGDALTLRCQGWKNTPLSQVKFYRDGKFLHFSKENQTLSMGAATVQSRGQYSCSGQVMYipqtFTQTS 98
Cdd:cd05753    1 WLLLQAPSAVVFEGEPLTLRCHGWKDKKVHKVTYYKDGKALKFSYENSNFSIPQATLSDSGSYHCSGTVRI----KRRSS 76


                 ....*..
gi 157057547  99 ETAMVQV 105
Cdd:cd05753   77 ESVNITV 83
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
 206-280 4.61e-09

Immunoglobulin domain; This family contains immunoglobulin-like domains.


Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 52.95  E-value: 4.61e-09
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547  206 RPVLTLHHGPADPAVGDMVQLLCEAQRGSPPILYSFYLDEKIVGNHSAPC---GGTTSLLFPVKSEQDAGNYSCEAEN 280
Cdd:pfam13927   1 KPVITVSPSSVTVREGETVTLTCEATGSPPPTITWYKNGEPISSGSTRSRslsGSNSTLTISNVTRSDAGTYTCVASN 78
Ig_2 pfam13895
Immunoglobulin domain; This domain contains immunoglobulin-like domains.
 19-86 3.39e-06

Immunoglobulin domain; This domain contains immunoglobulin-like domains.


Pssm-ID: 464026 [Multi-domain]  Cd Length: 79  Bit Score: 44.69  E-value: 3.39e-06
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547   19 WLYLQAWPNPVFEGDALTLRCQGWKNtPLSQVKFYRDGKFLhfsKENQTLSMGAATVQSRGQYSCSGQ 86
Cdd:pfam13895   1 KPVLTPSPTVVTEGEPVTLTCSAPGN-PPPSYTWYKDGSAI---SSSPNFFTLSVSAEDSGTYTCVAR 64
Ig cd00096
Immunoglobulin domain; The members here are composed of the immunoglobulin (Ig) domain found ...
 224-287 1.23e-05

Immunoglobulin domain; The members here are composed of the 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, including T-cell receptors, CD2, CD4, CD8, and membrane glycoproteins, including 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. Ig superfamily (IgSF) domains can be divided into 4 main classes based on their structures and sequences: the Variable (V), Constant 1 (C1), Constant 2 (C2), and Intermediate (I) sets. Typically, the V-set domains have A, B, E, and D strands in one sheet and A', G, F, C, C' and C" in the other. The structures in C1-set are smaller than those in the V-set; they have one beta sheet that is formed by strands A, B, E, and D and the other by strands G, F, C, and C'. Moreover, a C1-set Ig domain contains a short C' strand (three residues) and lacks A' and C" strand. Unlike other Ig domain sets, C2-set structures do not have a D strand. Like the V-set Ig domains, members of the I-set have a discontinuous A strand, but lack a C" strand.


Pssm-ID: 409353 [Multi-domain]  Cd Length: 70  Bit Score: 43.09  E-value: 1.23e-05
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547 224 VQLLCEAqRGSPPILYSFYLDEKIVGNHSAPC----GGTTSLLFPVKSEQDAGNYSCEAENSVSRERS 287
Cdd:cd00096    1 VTLTCSA-SGNPPPTITWYKNGKPLPPSSRDSrrseLGNGTLTISNVTLEDSGTYTCVASNSAGGSAS 67
IG_like smart00410
Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.
 123-198 4.95e-05

Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.


Pssm-ID: 214653 [Multi-domain]  Cd Length: 85  Bit Score: 41.72  E-value: 4.95e-05
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547   123 REGSLVTLRCQTKLHP------LRSALRLLFsfHKDGHTLQDRGPHPELCIPGAKEGDSGLYWCEVAPEGGQVQKQSpQL 196
Cdd:smart00410   7 KEGESVTLSCEASGSPppevtwYKQGGKLLA--ESGRFSVSRSGSTSTLTISNVTPEDSGTYTCAATNSSGSASSGT-TL 83


                   ..
gi 157057547   197 EV 198
Cdd:smart00410  84 TV 85
Ig_2 pfam13895
Immunoglobulin domain; This domain contains immunoglobulin-like domains.
 112-200 1.04e-04

Immunoglobulin domain; This domain contains immunoglobulin-like domains.


Pssm-ID: 464026 [Multi-domain]  Cd Length: 79  Bit Score: 40.46  E-value: 1.04e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  112 PVLSAiPSPEPREGSLVTLRCQTKLHPLrsalrLLFSFHKDGHTLqdrGPHPELCIPGAKEGDSGLYWCEVAPegGQVQK 191
Cdd:pfam13895   2 PVLTP-SPTVVTEGEPVTLTCSAPGNPP-----PSYTWYKDGSAI---SSSPNFFTLSVSAEDSGTYTCVARN--GRGGK 70


                  ....*....
gi 157057547  192 QSPQLEVRV 200
Cdd:pfam13895  71 VSNPVELTV 79
IgC2_D1_D2_LILR_KIR_like cd16843
Immunoglobulin (Ig)-like domain found in Leukocyte Ig-like receptors, Natural killer ...
 111-180 7.85e-04

Immunoglobulin (Ig)-like domain found in Leukocyte Ig-like receptors, Natural killer inhibitory receptors (KIRs) and similar domains; member of Immunoglobulin Constant-2 set of IgSF domains; The members here are composed of the first and second immunoglobulin (Ig)-like domains found in Leukocyte Ig-like receptors (LILRs), Natural killer inhibitory receptors (KIRs, also known as also known as cluster of differentiation (CD) 158), and similar proteins. This group includes LILRB1 (also known as LIR-1), LILRA5 (also known as LIR9), an activating natural cytotoxicity receptor NKp46, the immune-type receptor glycoprotein VI (GPVI), and the IgA-specific receptor Fc-alphaRI (also known as cluster of differentiation (CD) 89). LILRs are a family of immunoreceptors expressed on expressed on T and B cells, on monocytes, dendritic cells, and subgroups of natural killer (NK) cells. The human LILR family contains nine proteins (LILRA1-3, and 5, and LILRB1-5). From functional assays, and as the cytoplasmic domains of various LILRs, for example LILRB1, LILRB2 (also known as LIR-2), and LILRB3 (also known as LIR-3) contain immunoreceptor tyrosine-based inhibitory motifs (ITIMs), it is thought that LIR proteins are inhibitory receptors. Of the eight LIR family proteins, only LILRB1, and LILRB2, show detectable binding to class I MHC molecules; ligands for the other members have yet to be determined. The extracellular portions of the different LIR proteins contain different numbers of Ig-like domains for example, four in the case of LILRB1, and LILRB2, and two in the case of LILRB4 (also known as LIR-5). The activating natural cytotoxicity receptor NKp46 is expressed in natural killer cells, and is organized as an extracellular portion having two Ig-like extracellular domains, a transmembrane domain, and a small cytoplasmic portion. GPVI, which also contains two Ig-like domains, participates in the processes of collagen-mediated platelet activation and arterial thrombus formation. Fc-alphaRI is expressed on monocytes, eosinophils, neutrophils, and macrophages; it mediates IgA-induced immune effector responses such as phagocytosis, antibody-dependent cell-mediated cytotoxicity and respiratory burst. Killer cell immunoglobulin-like receptors (KIRs; also known as CD158 for human KIR) are transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. KIRs are a family of highly polymorphic activating and inhibitory receptors that serve as key regulators of human NK cell function. The KIR proteins are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The major ligands for KIR are MHC class I (HLA-A, -B or -C) molecules.


Pssm-ID: 409518 [Multi-domain]  Cd Length: 90  Bit Score: 38.51  E-value: 7.85e-04
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 157057547 111 PPVLSAIPSPEPREGSLVTLRCQTklhPLRSAlrlLFSFHKDGHTLQDRGPHP-------ELCIPGAKEGDSGLYWC 180
Cdd:cd16843    1 KPFLSAEPSSVVPLGENVTIRCQG---PPEAV---LFQLYKEGNSLSQGTVREkepqnkaEFYIPHMDRNHAGRYRC 71
 
Name Accession Description Interval E-value
Ig2_FcgammaR_like cd05753
Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; ...
 19-105 1.37e-38

Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; The members here are composed of the second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs). Interactions between IgG and FcgammaR are important to the initiation of cellular and humoral response. IgG binding to FcgammaR leads to a cascade of signals and ultimately to functions such as antibody-dependent-cellular-cytotoxicity (ADCC), endocytosis, phagocytosis, release of inflammatory mediators, etc. FcgammaR has two Ig-like domains. This group also contains FcepsilonRI which binds IgE with high affinity.


Pssm-ID: 409411  Cd Length: 83  Bit Score: 133.97  E-value: 1.37e-38
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  19 WLYLQAWPNPVFEGDALTLRCQGWKNTPLSQVKFYRDGKFLHFSKENQTLSMGAATVQSRGQYSCSGQVMYipqtFTQTS 98
Cdd:cd05753    1 WLLLQAPSAVVFEGEPLTLRCHGWKDKKVHKVTYYKDGKALKFSYENSNFSIPQATLSDSGSYHCSGTVRI----KRRSS 76


                 ....*..
gi 157057547  99 ETAMVQV 105
Cdd:cd05753   77 ESVNITV 83
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
 206-280 4.61e-09

Immunoglobulin domain; This family contains immunoglobulin-like domains.


Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 52.95  E-value: 4.61e-09
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547  206 RPVLTLHHGPADPAVGDMVQLLCEAQRGSPPILYSFYLDEKIVGNHSAPC---GGTTSLLFPVKSEQDAGNYSCEAEN 280
Cdd:pfam13927   1 KPVITVSPSSVTVREGETVTLTCEATGSPPPTITWYKNGEPISSGSTRSRslsGSNSTLTISNVTRSDAGTYTCVASN 78
Ig_2 pfam13895
Immunoglobulin domain; This domain contains immunoglobulin-like domains.
 206-289 7.73e-07

Immunoglobulin domain; This domain contains immunoglobulin-like domains.


Pssm-ID: 464026 [Multi-domain]  Cd Length: 79  Bit Score: 46.62  E-value: 7.73e-07
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  206 RPVLTLHhgPADPAVGDMVQLLCEAQrGSPPILYSFYLDEKIVGNHsapcggtTSLLFPVKSEQDAGNYSCEAENSVSRE 285
Cdd:pfam13895   1 KPVLTPS--PTVVTEGEPVTLTCSAP-GNPPPSYTWYKDGSAISSS-------PNFFTLSVSAEDSGTYTCVARNGRGGK 70


                  ....
gi 157057547  286 RSEP 289
Cdd:pfam13895  71 VSNP 74
Ig_2 pfam13895
Immunoglobulin domain; This domain contains immunoglobulin-like domains.
 19-86 3.39e-06

Immunoglobulin domain; This domain contains immunoglobulin-like domains.


Pssm-ID: 464026 [Multi-domain]  Cd Length: 79  Bit Score: 44.69  E-value: 3.39e-06
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547   19 WLYLQAWPNPVFEGDALTLRCQGWKNtPLSQVKFYRDGKFLhfsKENQTLSMGAATVQSRGQYSCSGQ 86
Cdd:pfam13895   1 KPVLTPSPTVVTEGEPVTLTCSAPGN-PPPSYTWYKDGSAI---SSSPNFFTLSVSAEDSGTYTCVAR 64
Ig_C17orf99 pfam17736
C17orf99 Ig domain; This Ig domain is found in tandem in the uncharacterized human protein ...
 221-287 8.48e-06

C17orf99 Ig domain; This Ig domain is found in tandem in the uncharacterized human protein C17orf99, which is found across mammalian species.


Pssm-ID: 465476  Cd Length: 95  Bit Score: 44.02  E-value: 8.48e-06
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  221 GDMVQLLCEAQRGSPPILYSFYLDEKIVGNHSAPCGGTT---SLLFPVKSEQDAGNYSCEAENSVSRERS 287
Cdd:pfam17736  16 GRRVLISCHASQGSPPITYSLVGSDGIVVAKKIPLHGEPanfSLNITLKSSPDLLTYQCQAANTSGTQVS 85
Ig cd00096
Immunoglobulin domain; The members here are composed of the immunoglobulin (Ig) domain found ...
 224-287 1.23e-05

Immunoglobulin domain; The members here are composed of the 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, including T-cell receptors, CD2, CD4, CD8, and membrane glycoproteins, including 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. Ig superfamily (IgSF) domains can be divided into 4 main classes based on their structures and sequences: the Variable (V), Constant 1 (C1), Constant 2 (C2), and Intermediate (I) sets. Typically, the V-set domains have A, B, E, and D strands in one sheet and A', G, F, C, C' and C" in the other. The structures in C1-set are smaller than those in the V-set; they have one beta sheet that is formed by strands A, B, E, and D and the other by strands G, F, C, and C'. Moreover, a C1-set Ig domain contains a short C' strand (three residues) and lacks A' and C" strand. Unlike other Ig domain sets, C2-set structures do not have a D strand. Like the V-set Ig domains, members of the I-set have a discontinuous A strand, but lack a C" strand.


Pssm-ID: 409353 [Multi-domain]  Cd Length: 70  Bit Score: 43.09  E-value: 1.23e-05
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547 224 VQLLCEAqRGSPPILYSFYLDEKIVGNHSAPC----GGTTSLLFPVKSEQDAGNYSCEAENSVSRERS 287
Cdd:cd00096    1 VTLTCSA-SGNPPPTITWYKNGKPLPPSSRDSrrseLGNGTLTISNVTLEDSGTYTCVASNSAGGSAS 67
ig pfam00047
Immunoglobulin domain; Members of the immunoglobulin superfamily are found in hundreds of ...
 220-283 2.57e-05

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.


Pssm-ID: 395002  Cd Length: 86  Bit Score: 42.57  E-value: 2.57e-05
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 157057547  220 VGDMVQLLCEAQRGSPPILYSF-----YLDEKIVGNHSAPCGGTTSLLFPVKSEQDAGNYSCEAENSVS 283
Cdd:pfam00047  10 EGDSATLTCSASTGSPGPDVTWskeggTLIESLKVKHDNGRTTQSSLLISNVTKEDAGTYTCVVNNPGG 78
IG_like smart00410
Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.
 123-198 4.95e-05

Immunoglobulin like; IG domains that cannot be classified into one of IGv1, IGc1, IGc2, IG.


Pssm-ID: 214653 [Multi-domain]  Cd Length: 85  Bit Score: 41.72  E-value: 4.95e-05
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547   123 REGSLVTLRCQTKLHP------LRSALRLLFsfHKDGHTLQDRGPHPELCIPGAKEGDSGLYWCEVAPEGGQVQKQSpQL 196
Cdd:smart00410   7 KEGESVTLSCEASGSPppevtwYKQGGKLLA--ESGRFSVSRSGSTSTLTISNVTPEDSGTYTCAATNSSGSASSGT-TL 83


                   ..
gi 157057547   197 EV 198
Cdd:smart00410  84 TV 85
IgI_2_Robo cd05724
Second immunoglobulin (Ig)-like domain in Robo (roundabout) receptors; member of the I-set of ...
 219-293 6.71e-05

Second immunoglobulin (Ig)-like domain in Robo (roundabout) receptors; member of the I-set of Ig superfamily (IgSF) domains; The members here are composed of 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 the 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, Robo2, and Robo3), and three mammalian Slit homologs (Slit-1,Slit-2, Slit-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, Robo2, and Robo3 are expressed by commissural neurons in the vertebrate spinal cord and Slit-1, Slit-2, Slit-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 Slit-2 has been shown by surface plasmon resonance experiments and mutational analysis to be the Ig1 domain, while the Ig2 domain has been proposed to harbor a weak secondary binding site. This group belongs to the I-set of IgSF domains, having A-B-E-D strands in one beta-sheet and A'-G-F-C-C' in the other. Like the V-set Ig domains, members of the I-set have a discontinuous A strand, but lack a C" strand.


Pssm-ID: 409389 [Multi-domain]  Cd Length: 87  Bit Score: 41.23  E-value: 6.71e-05
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547 219 AVGDMVQLLCEAQRGSPPILYSFYLDEK---IVGNHSAPCGGTTSLLFPVKSEqDAGNYSCEAENSVSRERSEPKKLS 293
Cdd:cd05724   10 AVGEMAVLECSPPRGHPEPTVSWRKDGQplnLDNERVRIVDDGNLLIAEARKS-DEGTYKCVATNMVGERESRAARLS 86
Ig_2 pfam13895
Immunoglobulin domain; This domain contains immunoglobulin-like domains.
 112-200 1.04e-04

Immunoglobulin domain; This domain contains immunoglobulin-like domains.


Pssm-ID: 464026 [Multi-domain]  Cd Length: 79  Bit Score: 40.46  E-value: 1.04e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  112 PVLSAiPSPEPREGSLVTLRCQTKLHPLrsalrLLFSFHKDGHTLqdrGPHPELCIPGAKEGDSGLYWCEVAPegGQVQK 191
Cdd:pfam13895   2 PVLTP-SPTVVTEGEPVTLTCSAPGNPP-----PSYTWYKDGSAI---SSSPNFFTLSVSAEDSGTYTCVARN--GRGGK 70


                  ....*....
gi 157057547  192 QSPQLEVRV 200
Cdd:pfam13895  71 VSNPVELTV 79
Ig1_FcgammaR_like cd05752
First immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; ...
 25-86 4.43e-04

First immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; The members here are composed of the first immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs). Interactions between IgG and FcgammaR are important to the initiation of cellular and humoral response. IgG binding to FcgammaR leads to a cascade of signals and ultimately to functions such as antibody-dependent-cellular-cytotoxicity (ADCC), endocytosis, phagocytosis, release of inflammatory mediators, etc. FcgammaR has two Ig-like domains. This group also contains FcepsilonRI which binds IgE with high affinity.


Pssm-ID: 409410 [Multi-domain]  Cd Length: 79  Bit Score: 38.88  E-value: 4.43e-04
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 157057547  25 WpNPVFEGDALTLRCQGWKNTPLSQVKFYRDGKFLhfSKENQTLSMGAATVQSRGQYSCSGQ 86
Cdd:cd05752    9 W-TTVFQGEKVTLTCQGFYSPEQNSTQWYHNGTLI--SSTSSSYRIVAATVNDSGEYRCQTQ 67
IgC_CRIg cd16082
Immunoglobulin (Ig) constant domain of the complement receptor of the immunoglobulin ...
 221-295 4.49e-04

Immunoglobulin (Ig) constant domain of the complement receptor of the immunoglobulin superfamily (CRIg); The members here are composed of the Immunoglobulin (Ig) constant domain of the complement receptor of the immunoglobulin superfamily (CRIg). The N-terminal domain of CRIg (also referred to as Z39Ig and V-set and Ig domain-containing 4 (VSIG4)) belongs to the IgV family of immunoglobulin-like domains while the C-terminal domain of CRIg belongs to the IgC family of immunoglobulin-like domains. CRIg plays a role in the complement system, an inhibitor of the alternative pathway convertases, and a negative regulator of T cell activation. 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.


Pssm-ID: 409504  Cd Length: 86  Bit Score: 38.97  E-value: 4.49e-04
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 157057547 221 GDMVQLLCEAQrGSPPILYSFYLDEKivgNHSAP--CGGTTSLLFPVKSEQDAGNYSCEAENSV-SRERSEPKKLSLK 295
Cdd:cd16082   13 GMRISLQCQAW-GSPPISYVWYKEQT---NNQEPikVAALSTLLFKPAVVADSGSYFCTAKGRVgSEQRSDIVKFVVK 86
IgI_hCEACAM_2_4_6_like cd05740
Immunoglobulin (Ig)-like domain of human carcinoembryonic antigen (CEA) related cell adhesion ...
 256-292 7.75e-04

Immunoglobulin (Ig)-like domain of human carcinoembryonic antigen (CEA) related cell adhesion molecule (CEACAM) domains 2, 4, and 6, and similar domains; The members here are composed of the second, fourth, and sixth immunoglobulin (Ig)-like domains in human 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, an angiogenic factor, and 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.


Pssm-ID: 409402 [Multi-domain]  Cd Length: 89  Bit Score: 38.53  E-value: 7.75e-04
                         10        20        30
                 ....*....|....*....|....*....|....*..
gi 157057547 256 GGTTSLLFPVKSEqDAGNYSCEAENSVSRERSEPKKL 292
Cdd:cd05740   51 GNRTLTLLNVTRE-DAGAYQCEISNPVSANRSDPVTL 86
IgC2_D1_D2_LILR_KIR_like cd16843
Immunoglobulin (Ig)-like domain found in Leukocyte Ig-like receptors, Natural killer ...
 111-180 7.85e-04

Immunoglobulin (Ig)-like domain found in Leukocyte Ig-like receptors, Natural killer inhibitory receptors (KIRs) and similar domains; member of Immunoglobulin Constant-2 set of IgSF domains; The members here are composed of the first and second immunoglobulin (Ig)-like domains found in Leukocyte Ig-like receptors (LILRs), Natural killer inhibitory receptors (KIRs, also known as also known as cluster of differentiation (CD) 158), and similar proteins. This group includes LILRB1 (also known as LIR-1), LILRA5 (also known as LIR9), an activating natural cytotoxicity receptor NKp46, the immune-type receptor glycoprotein VI (GPVI), and the IgA-specific receptor Fc-alphaRI (also known as cluster of differentiation (CD) 89). LILRs are a family of immunoreceptors expressed on expressed on T and B cells, on monocytes, dendritic cells, and subgroups of natural killer (NK) cells. The human LILR family contains nine proteins (LILRA1-3, and 5, and LILRB1-5). From functional assays, and as the cytoplasmic domains of various LILRs, for example LILRB1, LILRB2 (also known as LIR-2), and LILRB3 (also known as LIR-3) contain immunoreceptor tyrosine-based inhibitory motifs (ITIMs), it is thought that LIR proteins are inhibitory receptors. Of the eight LIR family proteins, only LILRB1, and LILRB2, show detectable binding to class I MHC molecules; ligands for the other members have yet to be determined. The extracellular portions of the different LIR proteins contain different numbers of Ig-like domains for example, four in the case of LILRB1, and LILRB2, and two in the case of LILRB4 (also known as LIR-5). The activating natural cytotoxicity receptor NKp46 is expressed in natural killer cells, and is organized as an extracellular portion having two Ig-like extracellular domains, a transmembrane domain, and a small cytoplasmic portion. GPVI, which also contains two Ig-like domains, participates in the processes of collagen-mediated platelet activation and arterial thrombus formation. Fc-alphaRI is expressed on monocytes, eosinophils, neutrophils, and macrophages; it mediates IgA-induced immune effector responses such as phagocytosis, antibody-dependent cell-mediated cytotoxicity and respiratory burst. Killer cell immunoglobulin-like receptors (KIRs; also known as CD158 for human KIR) are transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. KIRs are a family of highly polymorphic activating and inhibitory receptors that serve as key regulators of human NK cell function. The KIR proteins are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The major ligands for KIR are MHC class I (HLA-A, -B or -C) molecules.


Pssm-ID: 409518 [Multi-domain]  Cd Length: 90  Bit Score: 38.51  E-value: 7.85e-04
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 157057547 111 PPVLSAIPSPEPREGSLVTLRCQTklhPLRSAlrlLFSFHKDGHTLQDRGPHP-------ELCIPGAKEGDSGLYWC 180
Cdd:cd16843    1 KPFLSAEPSSVVPLGENVTIRCQG---PPEAV---LFQLYKEGNSLSQGTVREkepqnkaEFYIPHMDRNHAGRYRC 71
ig pfam00047
Immunoglobulin domain; Members of the immunoglobulin superfamily are found in hundreds of ...
 115-191 1.21e-03

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.


Pssm-ID: 395002  Cd Length: 86  Bit Score: 37.94  E-value: 1.21e-03
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  115 SAIPSPEPREGSLVTLRCqtKLHPLRSALRLLFSFHKDGHTLQDRGPHPE-------LCIPGAKEGDSGLYWCEVAPEGG 187
Cdd:pfam00047   1 SAPPTVTVLEGDSATLTC--SASTGSPGPDVTWSKEGGTLIESLKVKHDNgrttqssLLISNVTKEDAGTYTCVVNNPGG 78


                  ....
gi 157057547  188 QVQK 191
Cdd:pfam00047  79 SATL 82
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
 111-182 1.22e-03

Immunoglobulin domain; This family contains immunoglobulin-like domains.


Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 37.55  E-value: 1.22e-03
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  111 PPVLSAIPSP-EPREGSLVTLRCQTKLHPLRSalrllFSFHKDGHTLQD--------RGPHPELCIPGAKEGDSGLYWCE 181
Cdd:pfam13927   1 KPVITVSPSSvTVREGETVTLTCEATGSPPPT-----ITWYKNGEPISSgstrsrslSGSNSTLTISNVTRSDAGTYTCV 75


                  .
gi 157057547  182 V 182
Cdd:pfam13927  76 A 76
I-set pfam07679
Immunoglobulin I-set domain;
112-198 2.90e-03

Immunoglobulin I-set domain;


Pssm-ID: 400151 [Multi-domain]  Cd Length: 90  Bit Score: 36.85  E-value: 2.90e-03
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 157057547  112 PVLSAIPSP-EPREGSLVTLRCQTKLHPLRSalrllFSFHKDGHTLQD--------RGPHPELCIPGAKEGDSGLYWCEV 182
Cdd:pfam07679   1 PKFTQKPKDvEVQEGESARFTCTVTGTPDPE-----VSWFKDGQPLRSsdrfkvtyEGGTYTLTISNVQPDDSGKYTCVA 75

                          90
                  ....*....|....*.
gi 157057547  183 APEGGQVQKqSPQLEV 198
Cdd:pfam07679  76 TNSAGEAEA-SAELTV 90
IgV_1_Necl_like cd05717
First (N-terminal) immunoglobulin (Ig)-like domain of the nectin-like molecules; member of the ...
 29-84 3.44e-03

First (N-terminal) immunoglobulin (Ig)-like domain of the nectin-like molecules; member of the V-set of Ig superfamily (IgSF) domains; The members here are composed of the N-terminal immunoglobulin (Ig)-like domain of the nectin-like molecules Necl-1 (also known as cell adhesion molecule 3 (CADM3)), Necl-2 (CADM1), Necl-3 (CADM2), and similar proteins. At least five nectin-like molecules have been identified (Necl-1 to Necl-5). They all have an extracellular region containing three Ig-like domains, a transmembrane region, and a cytoplasmic region. The N-terminal Ig-like domain of the extracellular region belongs to the V-type subfamily of Ig domains, is essential to cell-cell adhesion, and plays a part in the interaction with the envelope glycoprotein D of various viruses. Necl-1, Necl-2, and Necl-3 have Ca(2+)-independent homophilic and heterophilic cell-cell adhesion activity. Necl-1 is specifically expressed in neural tissue, and is important to the formation of synapses, axon bundles, and myelinated axons. Necl-2 is expressed in a wide variety of tissues and is a putative tumour suppressor gene which is downregulated in aggressive neuroblastoma. Necl-3 accumulates in central and peripheral nervous system tissue and has been shown to selectively interact with oligodendrocytes. This group also contains Class-I MHC-restricted T-cell-associated molecule (CRTAM), whose expression pattern is consistent with its expression in Class-I MHC-restricted T-cells.


Pssm-ID: 409382  Cd Length: 94  Bit Score: 36.72  E-value: 3.44e-03
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 157057547  29 VFEGDALTLRCQ---------GWKNtPLSQVKFYRDGK--------FLHFSKENQTLSMGAATVQSRGQYSCS 84
Cdd:cd05717    8 VVEGETLTLKCQvslrddsslQWLN-PNGQTIYFNDKRalrdsryqLLNHSASELSISVSNVTLSDEGVYTCL 79
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
 29-83 5.69e-03

Immunoglobulin domain; This family contains immunoglobulin-like domains.


Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 35.62  E-value: 5.69e-03
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 157057547   29 VFEGDALTLRCQGwKNTPLSQVKFYRDGKFL--------HFSKENQTLSMGAATVQSRGQYSC 83
Cdd:pfam13927  13 VREGETVTLTCEA-TGSPPPTITWYKNGEPIssgstrsrSLSGSNSTLTISNVTRSDAGTYTC 74
Ig2_FcgammaR_like cd05753
Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; ...
 118-180 7.57e-03

Second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs), and similar domains; The members here are composed of the second immunoglobulin (Ig)-like domain of Fcgamma-receptors (FcgammaRs). Interactions between IgG and FcgammaR are important to the initiation of cellular and humoral response. IgG binding to FcgammaR leads to a cascade of signals and ultimately to functions such as antibody-dependent-cellular-cytotoxicity (ADCC), endocytosis, phagocytosis, release of inflammatory mediators, etc. FcgammaR has two Ig-like domains. This group also contains FcepsilonRI which binds IgE with high affinity.


Pssm-ID: 409411  Cd Length: 83  Bit Score: 35.36  E-value: 7.57e-03
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 157057547 118 PSPEPREGSLVTLRCQ----TKLHPLRsalrllfsFHKDGHTLQDRGPHPELCIPGAKEGDSGLYWC 180
Cdd:cd05753    7 PSAVVFEGEPLTLRCHgwkdKKVHKVT--------YYKDGKALKFSYENSNFSIPQATLSDSGSYHC 65
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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