Immunoglobulin C2-set domain (original) (raw)

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The basic structure of immunoglobulin (Ig) molecules is a tetramer of two light chains and two heavy chains linked by disulphide bonds. There are two types of light chains: kappa and lambda, each composed of a constant domain (CL) and a variable domain (VL). There are five types of heavy chains: alpha, delta, epsilon, gamma and mu, all consisting of a variable domain (VH) and three (in alpha, delta and gamma) or four (in epsilon and mu) constant domains (CH1 to CH4). Ig molecules are highly modular proteins, in which the variable and constant domains have clear, conserved sequence patterns. The domains in Ig and Ig-like molecules are grouped into four types: V-set (variable; InterPro: IPR013106), C1-set (constant-1; InterPro: IPR003597), C2-set (constant-2; InterPro: IPR008424) and I-set (

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dbo:abstract The basic structure of immunoglobulin (Ig) molecules is a tetramer of two light chains and two heavy chains linked by disulphide bonds. There are two types of light chains: kappa and lambda, each composed of a constant domain (CL) and a variable domain (VL). There are five types of heavy chains: alpha, delta, epsilon, gamma and mu, all consisting of a variable domain (VH) and three (in alpha, delta and gamma) or four (in epsilon and mu) constant domains (CH1 to CH4). Ig molecules are highly modular proteins, in which the variable and constant domains have clear, conserved sequence patterns. The domains in Ig and Ig-like molecules are grouped into four types: V-set (variable; InterPro: IPR013106), C1-set (constant-1; InterPro: IPR003597), C2-set (constant-2; InterPro: IPR008424) and I-set (intermediate; InterPro: IPR013098). Structural studies have shown that these domains share a common core Greek-key beta-sandwich structure, with the types differing in the number of strands in the beta-sheets as well as in their sequence patterns. Immunoglobulin-like domains that are related in both sequence and structure can be found in several diverse proteinfamilies. Ig-like domains are involved in a variety of functions, including cell–cell recognition, cell-surface receptors, muscle structure and the immune system. C2-set domains, which are Ig-like domains resembling the antibody constant domain. C2-set domains are found primarily in the mammalian T-cell surface antigens CD2 (Cluster of Differentiation 2), CD4 and CD80, as well as in vascular (VCAM) and intercellular (ICAM) cell adhesion molecules. CD2 mediates T-cell adhesion via its ectodomain, and signal transduction utilising its 117-amino acid cytoplasmic tail. CD2 displays structural and functional similarities with African swine fever virus (ASFV) LMW8-DR, a protein that is involved in cell–cell adhesion and immune response modulation, suggestinga possible role in the pathogenesis of ASFV infection. CD4 is the primary receptor for HIV-1. CD4 has four immunoglobulin-like domains in its extracellular region that share the same structure, but can differ in sequence. Certain extracellular domains may be involved in dimerisation. (en)
dbo:symbol C2-set
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dbp:interpro IPR008424 (en)
dbp:name Immunoglobulin C2-set domain (en)
dbp:pdb A:317–388 B:317–388 B:317–388 :316–386 B:128–198 :135–205 C:125–203 C:125–203 :125–203 C:125–203 C:125–203 :125–203 C:125–203 D:125–203 C:125–203 :125–203 :125–203 :125–203 C:125–203 :125–203 C:125–203 C:125–203 A:133–221 A:133–220 A:133–219 (en)
dbp:pfam PF05790 (en)
dbp:symbol C2-set (en)
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dct:subject dbc:Protein_domains dbc:Single-pass_transmembrane_proteins
gold:hypernym dbr:Tetramer
rdf:type owl:Thing dbo:Biomolecule wikidata:Q206229 wikidata:Q8054 yago:WikicatSingle-passTransmembraneProteins yago:Abstraction100002137 yago:Attribute100024264 yago:Chemical114806838 yago:Compound114818238 yago:Environment113934596 yago:Macromolecule114944888 yago:Material114580897 yago:Matter100020827 yago:Molecule114682133 yago:OrganicCompound114727670 yago:Part113809207 yago:PhysicalEntity100001930 yago:Protein114728724 yago:Relation100031921 dbo:ChemicalCompound dbo:Protein yago:Situation113927383 yago:Sphere114514039 yago:State100024720 yago:Substance100019613 yago:Thing100002452 yago:Unit109465459 yago:WikicatProteinDomains
rdfs:comment The basic structure of immunoglobulin (Ig) molecules is a tetramer of two light chains and two heavy chains linked by disulphide bonds. There are two types of light chains: kappa and lambda, each composed of a constant domain (CL) and a variable domain (VL). There are five types of heavy chains: alpha, delta, epsilon, gamma and mu, all consisting of a variable domain (VH) and three (in alpha, delta and gamma) or four (in epsilon and mu) constant domains (CH1 to CH4). Ig molecules are highly modular proteins, in which the variable and constant domains have clear, conserved sequence patterns. The domains in Ig and Ig-like molecules are grouped into four types: V-set (variable; InterPro: IPR013106), C1-set (constant-1; InterPro: IPR003597), C2-set (constant-2; InterPro: IPR008424) and I-set ( (en)
rdfs:label Immunoglobulin C2-set domain (en)
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