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Conserved domains on  [gi|47106069|ref|NP_998767|]
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sialic acid-binding Ig-like lectin 15 precursor [Homo sapiens]

Protein Classification

immunoglobulin domain-containing family protein( domain architecture ID 34076)

immunoglobulin (Ig) domain-containing family protein is a member of a large superfamily containing cell surface antigen receptors, co-receptors and co-stimulatory molecules of the immune system, molecules involved in antigen presentation to lymphocytes, cell adhesion molecules, certain cytokine receptors and intracellular muscle proteins; immunoglobulin domains are typically divided into 4 main classes based on their structures and sequences: the Variable (V), Constant 1 (C1), Constant 2 (C2), and Intermediate (I) sets

Graphical summary

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List of domain hits

Name Accession Description Interval E-value
Ig super family cl11960
Immunoglobulin domain; The members here are composed of the immunoglobulin (Ig) domain found ...
44-165 5.19e-14

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.


The actual alignment was detected with superfamily member cd05712:

Pssm-ID: 472250  Cd Length: 119  Bit Score: 67.41  E-value: 5.19e-14
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  44 WSMQVPPEVSAEAGDAAVLPCTFTHPHRHYDG-PLTAIWRAGEPYagPQVFRCAAARG-SELCQTalSLHGRFRLLGNPR 121
Cdd:cd05712   1 WGLQMPKSVTVQEGLCVLIPCSFSYPADYWVSnPVHGYWYRGGPY--PKYRPPVATNNrTREVHE--STQGRFRLLGDPG 76
                        90       100       110       120
                ....*....|....*....|....*....|....*....|....
gi 47106069 122 RNDLSLRVERLALADDRRYFCRVEFAGDVHDRYESRHGVrLHVT 165
Cdd:cd05712  77 KKNCSLSISDARPEDSGKYFFRVERGDSNKYSYLSNQLS-LTVT 119
Ig super family cl11960
Immunoglobulin domain; The members here are composed of the immunoglobulin (Ig) domain found ...
187-252 2.86e-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.


The actual alignment was detected with superfamily member cd05732:

Pssm-ID: 472250 [Multi-domain]  Cd Length: 96  Bit Score: 42.13  E-value: 2.86e-05
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069 187 CTAEGEPPPALAWSGPALGNSLAA--------VRS-PREGHGHLVTAELpalTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05732  23 CEAEGDPIPEITWRRATRGISFEEgdldgrivVRGhARVSSLTLKDVQL---TDAGRYDCEASNRIGGDQQSMYL 94
 
Name Accession Description Interval E-value
IgV_CD33 cd05712
Immunoglobulin Variable (IgV) domain at the N-terminus of CD33 and related Siglecs (sialic ...
44-165 5.19e-14

Immunoglobulin Variable (IgV) domain at the N-terminus of CD33 and related Siglecs (sialic acid-binding Ig-like lectins); The members here are composed of the immunoglobulin (Ig) domain at the N-terminus of Cluster of Differentiation (CD) 33 and related Siglecs (sialic acid-binding Ig-like lectins). Siglec refers to a structurally related protein family that specifically recognizes sialic acid in oligosaccharide chains of glycoproteins and glycolipids. Siglecs are type I transmembrane proteins, organized as an extracellular module composed of Ig-like domains, an N-terminal variable set of Ig-like carbohydrate recognition domains, and 1 to 16 constant Ig-like domains, followed by transmembrane and short cytoplasmic domains. Human Siglecs are classified into two subgroups, one subgroup is comprised of sialoadhesin (Siglec-1), CD22 (Siglec-2), and MAG, the other subgroup is comprised of CD33-related Siglecs which include CD33 (Siglec-3) and human Siglecs 5-11.


Pssm-ID: 409377  Cd Length: 119  Bit Score: 67.41  E-value: 5.19e-14
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  44 WSMQVPPEVSAEAGDAAVLPCTFTHPHRHYDG-PLTAIWRAGEPYagPQVFRCAAARG-SELCQTalSLHGRFRLLGNPR 121
Cdd:cd05712   1 WGLQMPKSVTVQEGLCVLIPCSFSYPADYWVSnPVHGYWYRGGPY--PKYRPPVATNNrTREVHE--STQGRFRLLGDPG 76
                        90       100       110       120
                ....*....|....*....|....*....|....*....|....
gi 47106069 122 RNDLSLRVERLALADDRRYFCRVEFAGDVHDRYESRHGVrLHVT 165
Cdd:cd05712  77 KKNCSLSISDARPEDSGKYFFRVERGDSNKYSYLSNQLS-LTVT 119
V-set pfam07686
Immunoglobulin V-set domain; This domain is found in antibodies as well as neural protein P0 ...
47-165 3.70e-08

Immunoglobulin V-set domain; This domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.


Pssm-ID: 462230  Cd Length: 109  Bit Score: 50.92  E-value: 3.70e-08
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069    47 QVPPEVSAEAGDAAVLPCTFthPHRHYDGPLTAIWRAGEPYAGPQvFRCAAARGSelcQTALSLHGRFRLLGNPRRNDLS 126
Cdd:pfam07686   1 QTPREVTVALGGSVTLPCTY--SSSMSEASTSVYWYRQPPGKGPT-FLIAYYSNG---SEEGVKKGRFSGRGDPSNGDGS 74
                          90       100       110
                  ....*....|....*....|....*....|....*....
gi 47106069   127 LRVERLALADDRRYFCRVEFAGDVHdryeSRHGVRLHVT 165
Cdd:pfam07686  75 LTIQNLTLSDSGTYTCAVIPSGEGV----FGKGTRLTVL 109
IgI_NCAM-1_like cd05732
Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 1 (NCAM-1) and similar ...
187-252 2.86e-05

Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 1 (NCAM-1) and similar proteins; The members here are composed of the fourth immunoglobulin (Ig)-like domain of Neural Cell Adhesion Molecule (NCAM-1). NCAM plays important roles in the development and regeneration of the central nervous system, in synaptogenesis and neural migration. NCAM mediates cell-cell and cell-substratum recognition and adhesion via homophilic (NCAM-NCAM), and heterophilic (NCAM-non-NCAM), interactions. NCAM is expressed as three major isoforms having different intracellular extensions. The extracellular portion of NCAM has five N-terminal Ig-like domains and two fibronectin type III domains. The double zipper adhesion complex model for NCAM homophilic binding involves Ig1, Ig2, and Ig3. By this model, Ig1 and Ig2 mediate dimerization of NCAM molecules situated on the same cell surface (cis interactions), and Ig3 domains mediate interactions between NCAM molecules expressed on the surface of opposing cells (trans interactions), through binding to the Ig1 and Ig2 domains. The adhesive ability of NCAM is modulated by the addition of polysialic acid chains to the fifth Ig-like domain. Also included in this group is NCAM-2 (also known as OCAM/mamFas II and RNCAM) NCAM-2 is differentially expressed in the developing and mature olfactory epithelium (OE). One of the unique features of I-set domains is the lack of a C" strand. The structures of this group show that the Ig domain lacks this strand and thus is a member of the I-set of Ig domains.


Pssm-ID: 409395 [Multi-domain]  Cd Length: 96  Bit Score: 42.13  E-value: 2.86e-05
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069 187 CTAEGEPPPALAWSGPALGNSLAA--------VRS-PREGHGHLVTAELpalTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05732  23 CEAEGDPIPEITWRRATRGISFEEgdldgrivVRGhARVSSLTLKDVQL---TDAGRYDCEASNRIGGDQQSMYL 94
I-set pfam07679
Immunoglobulin I-set domain;
187-252 7.35e-05

Immunoglobulin I-set domain;


Pssm-ID: 400151 [Multi-domain]  Cd Length: 90  Bit Score: 41.09  E-value: 7.35e-05
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069   187 CTAEGEPPPALAWSgpaLGNSlaavrSPREGHGHLVTAE--------LPALTHD-GRYTCTAANSLGRSEASVYL 252
Cdd:pfam07679  22 CTVTGTPDPEVSWF---KDGQ-----PLRSSDRFKVTYEggtytltiSNVQPDDsGKYTCVATNSAGEAEASAEL 88
 
Name Accession Description Interval E-value
IgV_CD33 cd05712
Immunoglobulin Variable (IgV) domain at the N-terminus of CD33 and related Siglecs (sialic ...
44-165 5.19e-14

Immunoglobulin Variable (IgV) domain at the N-terminus of CD33 and related Siglecs (sialic acid-binding Ig-like lectins); The members here are composed of the immunoglobulin (Ig) domain at the N-terminus of Cluster of Differentiation (CD) 33 and related Siglecs (sialic acid-binding Ig-like lectins). Siglec refers to a structurally related protein family that specifically recognizes sialic acid in oligosaccharide chains of glycoproteins and glycolipids. Siglecs are type I transmembrane proteins, organized as an extracellular module composed of Ig-like domains, an N-terminal variable set of Ig-like carbohydrate recognition domains, and 1 to 16 constant Ig-like domains, followed by transmembrane and short cytoplasmic domains. Human Siglecs are classified into two subgroups, one subgroup is comprised of sialoadhesin (Siglec-1), CD22 (Siglec-2), and MAG, the other subgroup is comprised of CD33-related Siglecs which include CD33 (Siglec-3) and human Siglecs 5-11.


Pssm-ID: 409377  Cd Length: 119  Bit Score: 67.41  E-value: 5.19e-14
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  44 WSMQVPPEVSAEAGDAAVLPCTFTHPHRHYDG-PLTAIWRAGEPYagPQVFRCAAARG-SELCQTalSLHGRFRLLGNPR 121
Cdd:cd05712   1 WGLQMPKSVTVQEGLCVLIPCSFSYPADYWVSnPVHGYWYRGGPY--PKYRPPVATNNrTREVHE--STQGRFRLLGDPG 76
                        90       100       110       120
                ....*....|....*....|....*....|....*....|....
gi 47106069 122 RNDLSLRVERLALADDRRYFCRVEFAGDVHDRYESRHGVrLHVT 165
Cdd:cd05712  77 KKNCSLSISDARPEDSGKYFFRVERGDSNKYSYLSNQLS-LTVT 119
V-set pfam07686
Immunoglobulin V-set domain; This domain is found in antibodies as well as neural protein P0 ...
47-165 3.70e-08

Immunoglobulin V-set domain; This domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.


Pssm-ID: 462230  Cd Length: 109  Bit Score: 50.92  E-value: 3.70e-08
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069    47 QVPPEVSAEAGDAAVLPCTFthPHRHYDGPLTAIWRAGEPYAGPQvFRCAAARGSelcQTALSLHGRFRLLGNPRRNDLS 126
Cdd:pfam07686   1 QTPREVTVALGGSVTLPCTY--SSSMSEASTSVYWYRQPPGKGPT-FLIAYYSNG---SEEGVKKGRFSGRGDPSNGDGS 74
                          90       100       110
                  ....*....|....*....|....*....|....*....
gi 47106069   127 LRVERLALADDRRYFCRVEFAGDVHdryeSRHGVRLHVT 165
Cdd:pfam07686  75 LTIQNLTLSDSGTYTCAVIPSGEGV----FGKGTRLTVL 109
IgV_TIM-3_like cd20982
Immunoglobulin Variable (IgV) domain of T cell Immunoglobulin Domain and Mucin Domain 3 (Tim-3) ...
51-152 2.47e-07

Immunoglobulin Variable (IgV) domain of T cell Immunoglobulin Domain and Mucin Domain 3 (Tim-3), and similar domains; The members here are composed of the immunoglobulin variable (IgV) domain of T cell immunoglobulin domain and mucin domain 3 (Tim-3; also known as Hepatitis A virus cellular receptor 2 (HAVcr-2) and Cluster of Differentiation 366 (CD366)) and similar proteins. TIM-3 is a checkpoint inhibitor in immune responses to tumors, as well as involved in chronic viral infections. Thus, Tim-3 has emerged as one of most promising immune checkpoint targets for cancer immunotherapy. Tim-3 is highly expressed on Th1 lymphocytes and CD11b(+) macrophages and is upregulated on activated T and myeloid cells. TIM-3 regulates macrophage, activation and inhibits Th1 mediated immune responses to promote immunological tolerance. There are three TIM family members in humans (TIM-1, TIM-3, and TIM-4) and eight members in mice (TIM-1 to TIM-8). The IgV domain of human TIM-3 has been shown to bind ligands such as carcinoembryonic antigen cell adhesion molecule 1 (CEACAM1), high mobility group protein B1 (HMGB1)and galectin-9 (GAL9). The binding of GAL9 to TIM-3 can negatively regulate Th1 immune response, enhance immune tolerance and inhibit anti#tumor immunity. Dysregulation of the TIM-3/GAL9 pathway is implicated in numerous chronic autoimmune diseases, such as multiple sclerosis and systemic lupus erythematosus.


Pssm-ID: 409574  Cd Length: 107  Bit Score: 48.61  E-value: 2.47e-07
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  51 EVSAEAGDAAVLPCTFThphRHYDGPLTAI-WRAGEPyagpQVFRCaaarGSELCQT-----ALSLHGRFRLLGNPRRND 124
Cdd:cd20982   2 EYRAEVGHNAYLPCSYT---TAAPGNLVPVcWGKGAC----PVSYC----GNVLLRTderdvTYQKSSRYQLKGDFSKGD 70
                        90       100
                ....*....|....*....|....*...
gi 47106069 125 LSLRVERLALADDRRYFCRVEFAGDVHD 152
Cdd:cd20982  71 VSLTIENVTLADSGIYCCRIQIPGIMND 98
IgI_NCAM-1_like cd05732
Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 1 (NCAM-1) and similar ...
187-252 2.86e-05

Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 1 (NCAM-1) and similar proteins; The members here are composed of the fourth immunoglobulin (Ig)-like domain of Neural Cell Adhesion Molecule (NCAM-1). NCAM plays important roles in the development and regeneration of the central nervous system, in synaptogenesis and neural migration. NCAM mediates cell-cell and cell-substratum recognition and adhesion via homophilic (NCAM-NCAM), and heterophilic (NCAM-non-NCAM), interactions. NCAM is expressed as three major isoforms having different intracellular extensions. The extracellular portion of NCAM has five N-terminal Ig-like domains and two fibronectin type III domains. The double zipper adhesion complex model for NCAM homophilic binding involves Ig1, Ig2, and Ig3. By this model, Ig1 and Ig2 mediate dimerization of NCAM molecules situated on the same cell surface (cis interactions), and Ig3 domains mediate interactions between NCAM molecules expressed on the surface of opposing cells (trans interactions), through binding to the Ig1 and Ig2 domains. The adhesive ability of NCAM is modulated by the addition of polysialic acid chains to the fifth Ig-like domain. Also included in this group is NCAM-2 (also known as OCAM/mamFas II and RNCAM) NCAM-2 is differentially expressed in the developing and mature olfactory epithelium (OE). One of the unique features of I-set domains is the lack of a C" strand. The structures of this group show that the Ig domain lacks this strand and thus is a member of the I-set of Ig domains.


Pssm-ID: 409395 [Multi-domain]  Cd Length: 96  Bit Score: 42.13  E-value: 2.86e-05
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069 187 CTAEGEPPPALAWSGPALGNSLAA--------VRS-PREGHGHLVTAELpalTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05732  23 CEAEGDPIPEITWRRATRGISFEEgdldgrivVRGhARVSSLTLKDVQL---TDAGRYDCEASNRIGGDQQSMYL 94
IgI_5_Robo cd20952
Fifth Ig-like domain of Roundabout (Robo) homolog 1/2, and similar domains; a member of the ...
186-252 3.08e-05

Fifth Ig-like domain of Roundabout (Robo) homolog 1/2, and similar domains; a member of the I-set of IgSF domains; The members here are composed of the fifth Ig-like domain of Roundabout (Robo) homolog 1/2 and similar domains. 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. The fifth Ig-like domain of Robo 1 and 2 is a member of the I-set Ig 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. I-set domains are found in several cell adhesion molecules (such as VCAM, ICAM, and MADCAM), and are also present in numerous other diverse protein families, including several tyrosine-protein kinase receptors


Pssm-ID: 409544 [Multi-domain]  Cd Length: 87  Bit Score: 42.10  E-value: 3.08e-05
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 47106069 186 LCTAEGEPPPALAWSGPalGNSLAaVRSPR-----EGHGHLVTAELpalTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd20952  20 NCQATGEPVPTISWLKD--GVPLL-GKDERittleNGSLQIKGAEK---SDTGEYTCVALNLSGEATWSAVL 85
Ig4_Peroxidasin cd05746
Fourth immunoglobulin (Ig)-like domain of peroxidasin; The members here are composed of the ...
187-252 3.54e-05

Fourth immunoglobulin (Ig)-like domain of peroxidasin; The members here are composed of the fourth immunoglobulin (Ig)-like domain in peroxidasin. Peroxidasin has a peroxidase domain and interacting extracellular motifs containing four Ig-like domains. It has been suggested that peroxidasin is secreted, and has functions related to the stabilization of the extracellular matrix. It may play a part in various other important processes such as removal and destruction of cells which have undergone programmed cell death and protection of the organism against non-self.


Pssm-ID: 143223  Cd Length: 69  Bit Score: 41.40  E-value: 3.54e-05
                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 47106069 187 CTAEGEPPPALAWS--GPALGNSLAAVRSPregHGHLVTAELpALTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05746   5 CSAQGDPEPTITWNkdGVQVTESGKFHISP---EGYLAIRDV-GVADQGRYECVARNTIGYASVSMVL 68
Ig cd00096
Immunoglobulin domain; The members here are composed of the immunoglobulin (Ig) domain found ...
187-249 5.68e-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: 40.78  E-value: 5.68e-05
                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 47106069 187 CTAEGEPPPALAWS--GPALGNSLAAVRSPREGHGHLVtaeLPALT--HDGRYTCTAANSLGRSEAS 249
Cdd:cd00096   5 CSASGNPPPTITWYknGKPLPPSSRDSRRSELGNGTLT---ISNVTleDSGTYTCVASNSAGGSASA 68
I-set pfam07679
Immunoglobulin I-set domain;
187-252 7.35e-05

Immunoglobulin I-set domain;


Pssm-ID: 400151 [Multi-domain]  Cd Length: 90  Bit Score: 41.09  E-value: 7.35e-05
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069   187 CTAEGEPPPALAWSgpaLGNSlaavrSPREGHGHLVTAE--------LPALTHD-GRYTCTAANSLGRSEASVYL 252
Cdd:pfam07679  22 CTVTGTPDPEVSWF---KDGQ-----PLRSSDRFKVTYEggtytltiSNVQPDDsGKYTCVATNSAGEAEASAEL 88
IgI_3_Robo cd05725
Third immunoglobulin (Ig)-like domain in Robo (roundabout) receptors; member of the I-set of ...
171-252 1.72e-04

Third 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 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, Robo2, 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, and 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 Slit2 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: 409390 [Multi-domain]  Cd Length: 83  Bit Score: 39.69  E-value: 1.72e-04
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069 171 VNISVLPSPAHAFRalCTAEGEPPPALAWS--GPALGNSLAAVRSPREGHGHLVTAElpaltHDGRYTCTAANSLGRSEA 248
Cdd:cd05725   5 QNQVVLVDDSAEFQ--CEVGGDPVPTVRWRkeDGELPKGRYEILDDHSLKIRKVTAG-----DMGSYTCVAENMVGKIEA 77

                ....
gi 47106069 249 SVYL 252
Cdd:cd05725  78 SATL 81
IgI_NCAM-2 cd05870
Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 2 (NCAM-2); The members ...
186-252 1.74e-04

Immunoglobulin (Ig)-like I-set domain of Neural Cell Adhesion Molecule 2 (NCAM-2); The members here are composed of the fourth Ig domain of Neural Cell Adhesion Molecule NCAM-2 (also known as OCAM/mamFas II and RNCAM). NCAM-2 is organized similarly to NCAM, including five N-terminal Ig-like domains and two fibronectin type III domains. NCAM-2 is differentially expressed in the developing and mature olfactory epithelium (OE), and may function like NCAM, as an adhesion molecule. One of the unique features of I-set domains is the lack of a C" strand. The structures of this group show that the Ig domain lacks this strand and thus is a member of the I-set of Ig domains.


Pssm-ID: 143278 [Multi-domain]  Cd Length: 98  Bit Score: 39.96  E-value: 1.74e-04
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 47106069 186 LCTAEGEPPPALAWSGPALGNSLA-AVRSP------REGHGH-LVTAELPALTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05870  22 SCKAEGEPIPEITWKRASDGHTFSeGDKSPdgrievKGQHGEsSLHIKDVKLSDSGRYDCEAASRIGGHQKSMYL 96
IgV_P0-like cd05715
Immunoglobulin (Ig)-like domain of protein zero (P0) and similar proteins; The members here ...
48-164 3.05e-04

Immunoglobulin (Ig)-like domain of protein zero (P0) and similar proteins; The members here are composed of the immunoglobulin (Ig) domain of protein zero (P0), a myelin membrane adhesion molecule. P0 accounts for over 50% of the total protein in peripheral nervous system (PNS) myelin. P0 is a single-pass transmembrane glycoprotein with a highly basic intracellular domain and an extracellular Ig domain. The extracellular domain of P0 (P0-ED) is similar to the Ig variable domain, carrying one acceptor sequence for N-linked glycosylation. P0 plays a role in membrane adhesion in the spiral wraps of the myelin sheath. The intracellular domain is thought to mediate membrane apposition of the cytoplasmic faces and may, through electrostatic interactions, interact directly with lipid headgroups. It is thought that homophilic interactions of the P0 extracellular domain mediate membrane juxtaposition in the extracellular space of PNS myelin. This group also contains the Ig domain of sodium channel subunit beta-2 (SCN2B), and of epithelial V-like antigen 1 (EVA). EVA, also known as myelin protein zero-like 2, is an adhesion molecule, which may play a role in structural organization of the thymus and early lymphocyte development. SCN2B subunits play a role in determining sodium channel density and function in neurons,and in control of electrical excitability in the brain.


Pssm-ID: 409380  Cd Length: 117  Bit Score: 39.72  E-value: 3.05e-04
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  48 VPPEVSAEAGDAAVLPCTFTHPHRHYDGpLTAIWRAGEPYAGPQVFRCAAARGselcQTALSLHGRFR----LLGNPRRN 123
Cdd:cd05715   5 TPRELNVLNGSDVRLTCTFTSCYTVGDA-FSVTWTYQPEGGNTTESMFHYSKG----KPYILKVGRFKdrvsWAGNPSKK 79
                        90       100       110       120
                ....*....|....*....|....*....|....*....|..
gi 47106069 124 DLSLRVERLALADDRRYFCRVEFAGDVHdryeSRHG-VRLHV 164
Cdd:cd05715  80 DASIVISNLQFSDNGTYTCDVKNPPDIV----GGHGeIRLYV 117
IgV_CAR_like cd20960
Immunoglobulin Variable (V) domain of the Coxsackievirus and Adenovirus Receptor (CAR), and ...
56-158 3.48e-04

Immunoglobulin Variable (V) domain of the Coxsackievirus and Adenovirus Receptor (CAR), and similar proteins; The members here are composed of the Variable (V) domain of the Coxsackievirus and Adenovirus Receptor (CAR), and similar proteins. CAR, which is encoded by human CXADR gene, is a cell adhesion molecule of the Immunoglobulin (Ig) superfamily. The CAR acts as a type I membrane receptor for group B1-B6 coxsackie viruses and subgroup C adenoviruses. For instance, adenovirus interacts with the coxsackievirus and adenovirus receptor to enter epithelial airway cells. The CAR is also shown to be involved in physiological processes such as neuronal and heart development, epithelial tight junction integrity, and tumor suppression. The CAR is a component of the epithelial apical junction complex that may function as a homophilic cell adhesion molecule and is essential for tight junction integrity. The CAR is also involved in transepithelial migration of leukocytes through adhesive interactions with JAML a transmembrane protein of the plasma membrane of leukocytes. The interaction between both receptors also mediates the activation of gamma-delta T-cells, a subpopulation of T-cells residing in epithelia and involved in tissue homeostasis and repair. The CAR is composed of one V-set and one C2-set Ig module, a single transmembrane helix, and an intracellular domain. This group belongs to the V-set of IgSF domains, having A, B, E and D strands in one beta-sheet and A', G, F, C, C' and C" in the other


Pssm-ID: 409552  Cd Length: 114  Bit Score: 39.74  E-value: 3.48e-04
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  56 AGDAAVLPCTFTHPHRHyDGPLTAIWRAGEP---------YAGPQVFRcaaargselcQTALSLHGRFRLLGNPRRNDLS 126
Cdd:cd20960  14 AGENVTLPCHHQLGLED-QGTLDIEWLLLPSdkvekvvitYSGDRVYN----------HYYPALKGRVAFTSNDLSGDAS 82
                        90       100       110
                ....*....|....*....|....*....|..
gi 47106069 127 LRVERLALADDRRYFCRVEFAGdvhdRYESRH 158
Cdd:cd20960  83 LNISNLKLSDTGTYQCKVKKAP----GYAWSK 110
IgI_2_Titin_Z1z2-like cd20972
Second Ig-like domain of the giant muscle protein titin Z1z2 in the sarcomeric Z-disk, and ...
187-253 3.69e-04

Second Ig-like domain of the giant muscle protein titin Z1z2 in the sarcomeric Z-disk, and similar domains; a member of the I-set of IgSF domains; The members here are composed of the second immunoglobulin (Ig)-like domain of the giant muscle protein titin Z1z2 in the sarcomeric Z-disk and similar proteins. Titin is a key component in the assembly and functioning of vertebrate striated muscles. By providing connections at the level of individual microfilaments, it contributes to the fine balance of forces between the two halves of the sarcomere. The Ig superfamily (IgSF) is a heterogenous group of proteins, built on a common fold comprised of a sandwich of two beta sheets. 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. Unlike the V-set, one of the distinctive features of I-set domains is the lack of a C" strand. The structure of the titin Z1z2 lacks this strand and thus it belongs to the I-set of the IgSF. I-set domains are found in several cell adhesion molecules (such as VCAM, ICAM, and MADCAM), and are also present in numerous other diverse protein families, including several tyrosine-protein kinase receptors, the hemolymph protein hemolin, the muscle proteins titin, telokin, and twitchin, the neuronal adhesion molecule axonin-1, and the signaling molecule semaphorin 4D that is involved in axonal guidance, immune function and angiogenesis.


Pssm-ID: 409564 [Multi-domain]  Cd Length: 91  Bit Score: 39.10  E-value: 3.69e-04
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 47106069 187 CTAEGEPPPALAW--SGPALGNSLAaVRSPREGHGH-LVTAElpALTHD-GRYTCTAANSLGRSEASVYLF 253
Cdd:cd20972  23 CRVTGNPTPVVRWfcEGKELQNSPD-IQIHQEGDLHsLIIAE--AFEEDtGRYSCLATNSVGSDTTSAEIF 90
Ig_3 pfam13927
Immunoglobulin domain; This family contains immunoglobulin-like domains.
187-241 6.77e-04

Immunoglobulin domain; This family contains immunoglobulin-like domains.


Pssm-ID: 464046 [Multi-domain]  Cd Length: 78  Bit Score: 37.93  E-value: 6.77e-04
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 47106069   187 CTAEGEPPPALAWS--GPALGNSLAAVRSPREGHGHL----VTAElpaltHDGRYTCTAAN 241
Cdd:pfam13927  23 CEATGSPPPTITWYknGEPISSGSTRSRSLSGSNSTLtisnVTRS-----DAGTYTCVASN 78
IgI_telokin-like cd20973
immunoglobulin-like domain of telokin and similar proteins; a member of the I-set of IgSF ...
178-252 8.39e-04

immunoglobulin-like domain of telokin and similar proteins; a member of the I-set of IgSF domains; The members here are composed of the immunoglobulin (Ig) domain in telokin, the C-terminal domain of myosin light chain kinase which is identical to telokin, and similar proteins. The Ig superfamily (IgSF) is a heterogenous group of proteins, built on a common fold comprised of a sandwich of two beta sheets. 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. Unlike the V-set, one of the distinctive features of I-set domains is the lack of a C" strand. The structure of the telokin Ig domain lacks this strand and thus it belongs to the I-set of the IgSF. I-set domains are found in several cell adhesion molecules (such as VCAM, ICAM, and MADCAM), and are also present in numerous other diverse protein families, including several tyrosine-protein kinase receptors, the hemolymph protein hemolin, the muscle proteins titin, telokin, and twitchin, the neuronal adhesion molecule axonin-1, and the signaling molecule semaphorin 4D that is involved in axonal guidance, immune function and angiogenesis.


Pssm-ID: 409565 [Multi-domain]  Cd Length: 88  Bit Score: 37.94  E-value: 8.39e-04
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 47106069 178 SPAHAFRALCTAEGEPPPALAWS---GPALGNSLAAVRSPREGHGHLVTAElPALTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd20973  10 VEGSAARFDCKVEGYPDPEVKWMkddNPIVESRRFQIDQDEDGLCSLIISD-VCGDDSGKYTCKAVNSLGEATCSAEL 86
IgV_NKp30 cd20926
Immunoglobulin variable (IgV) domain of Natural Killer cell activating receptor NKp30 and ...
44-148 3.76e-03

Immunoglobulin variable (IgV) domain of Natural Killer cell activating receptor NKp30 and similar domains; The members here are composed of the immunoglobulin variable region (IgV) of Natural Killer cell activating receptor NKp30 (also known as Natural Cytotoxicity triggering Receptor 3 (NCR3)) and similar domains. NKp30 Recognizes the N-Terminal IgV Domain of B7-H6. In humans, the activating natural cytotoxicity receptor NKp30 plays a major role in NK cell-mediated tumor cell lysis. NKp30 recognizes the cell-surface protein B7-H6, which is expressed on tumor, but not healthy, cells.


Pssm-ID: 409520  Cd Length: 112  Bit Score: 36.49  E-value: 3.76e-03
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 47106069  44 WSMQvPPEVSAEAGDAAVLPCTFTHPHrhydgpltaiwraGEPYAGPQV-FRCAAARGSELCQTALSLHGRFRLLGNPR- 121
Cdd:cd20926   3 WVSQ-PPEIRTLEGSSAFLPCSFNASQ-------------GRLAIGSVTwFRDEVAPGKEVRNGTPEFRGRLAPLASSRf 68
                        90       100
                ....*....|....*....|....*....
gi 47106069 122 --RNDLSLRVERLALADDRRYFCRVEFAG 148
Cdd:cd20926  69 lrDHQAELHIWDVRGHDAGIYVCRVEVLG 97
Ig3_Peroxidasin cd05745
Third immunoglobulin (Ig)-like domain of peroxidasin; The members here are composed of the ...
186-252 3.82e-03

Third immunoglobulin (Ig)-like domain of peroxidasin; The members here are composed of the third immunoglobulin (Ig)-like domain in peroxidasin. Peroxidasin has a peroxidase domain and interacting extracellular motifs containing four Ig-like domains. It has been suggested that peroxidasin is secreted and has functions related to the stabilization of the extracellular matrix. It may play a part in various other important processes such as removal and destruction of cells which have undergone programmed cell death and protection of the organism against non-self.


Pssm-ID: 143222 [Multi-domain]  Cd Length: 74  Bit Score: 35.68  E-value: 3.82e-03
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 47106069 186 LCTAEGEPPPALAWSGPalGNSLAAVRSpreghgHLVTAE-----LPALTHD-GRYTCTAANSLGRSEASVYL 252
Cdd:cd05745   8 LCEAQGYPQPVIAWTKG--GSQLSVDRR------HLVLSSgtlriSRVALHDqGQYECQAVNIVGSQRTVAQL 72
IgI_4_MYLK-like cd20976
Fourth Ig-like domain from smooth muscle myosin light chain kinase and similar domains ; a ...
183-252 3.97e-03

Fourth Ig-like domain from smooth muscle myosin light chain kinase and similar domains ; a member of the I-set of IgSF domains; The members here are composed of the fourth immunoglobulin (Ig)-like domain from smooth muscle myosin light chain kinase (MYLK) and similar domains. The Ig superfamily (IgSF) is a heterogenous group of proteins, built on a common fold comprised of a sandwich of two beta sheets. 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. Unlike the V-set, one of the distinctive features of I-set domains is the lack of a C" strand. The structure of this group shows that the fourth Ig-like domain from myosin light chain kinase lacks this strand and thus belongs to the I-set of the IgSF. I-set domains are found in several cell adhesion molecules (such as VCAM, ICAM, and MADCAM), and are also present in numerous other diverse protein families, including several tyrosine-protein kinase receptors, the hemolymph protein hemolin, the muscle proteins titin, telokin, and twitchin, the neuronal adhesion molecule axonin-1, and the signaling molecule semaphorin 4D that is involved in axonal guidance, immune function and angiogenesis.


Pssm-ID: 409568 [Multi-domain]  Cd Length: 90  Bit Score: 36.07  E-value: 3.97e-03
                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 47106069 183 FRALCTAEGEPPPALAWSGPALGNSLAAVRSPREGHGHLVTAElPALTHD-GRYTCTAANSLGRSEASVYL 252
Cdd:cd20976  19 FVAQCSARGKPVPRITWIRNAQPLQYAADRSTCEAGVGELHIQ-DVLPEDhGTYTCLAKNAAGQVSCSAWV 88
IgI_SALM5_like cd05764
Immunoglobulin domain of human Synaptic Adhesion-Like Molecule 5 (SALM5) and similar proteins; ...
187-252 7.74e-03

Immunoglobulin domain of human Synaptic Adhesion-Like Molecule 5 (SALM5) and similar proteins; member of the I-set of IgSF domains; This group contains the immunoglobulin domain of human Synaptic Adhesion-Like Molecule 5 (SALM5) and similar proteins. The SALM (for synaptic adhesion-like molecules; also known as Lrfn for leucine-rich repeat and fibronectin type III domain containing) family of adhesion molecules consists of five known members: SALM1/Lrfn2, SALM2/Lrfn1, SALM3/Lrfn4, SALM4/Lrfn3, and SALM5/Lrfn5. SALMs share a similar domain structure, containing leucine-rich repeats (LRRs), an immunoglobulin (Ig) domain, and a fibronectin III (FNIII) domain, followed by a transmembrane domain and a C-terminal PDZ-binding motif. SALM5 is implicated in autism spectrum disorders (ASDs) and schizophrenia, induces presynaptic differentiation in contacting axons. SALM5 interacts with the Ig domains of LAR (Leukocyte common Antigen-Related) family receptor protein tyrosine phosphatases (LAR-RPTPs; LAR, PTPdelta, and PTPsigma). In addition, PTPdelta is implicated in ASDs, ADHD, bipolar disorder, and restless leg syndrome. Studies have shown that LAR-RPTPs are novel and splicing-dependent presynaptic ligands for SALM5, and that they mediate SALM5-dependent presynaptic differentiation. Furthermore, SALM5 maintains AMPA receptor (AMPAR)-mediated excitatory synaptic transmission through mechanisms involving the interaction of SALM5 with LAR-RPTPs. This group belongs to the I-set of immunoglobulin superfamily (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: 409421 [Multi-domain]  Cd Length: 88  Bit Score: 35.14  E-value: 7.74e-03
                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 47106069 187 CTAEGEPPPALAWSGPA---LGNSLAAVRSPREGHGHLVTAelpaLTHDGRYTCTAANSLGRSEASVYL 252
Cdd:cd05764  22 CKARGDPEPAIHWISPEgklISNSSRTLVYDNGTLDILITT----VKDTGAFTCIASNPAGEATARVEL 86
 
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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