C8 complex
{{Short description|Protein involved in the complement system}}
Complement component 8 is a protein involved in the complement system. It is part of the membrane attack complex (MAC).
A hereditary deficiency of C8 can result in increased susceptibility to Neisseria infections, such as meningitis and gonorrhea.
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{{protein
| Name = complement component 8, alpha polypeptide
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| HGNCid = 1352
| Symbol = C8A
| AltSymbols =
| EntrezGene = 731
| OMIM = 120950
| RefSeq = NM_000562
| UniProt = P07357
| PDB =
| ECnumber =
| Chromosome = 1
| Arm = p
| Band = 36.2
| LocusSupplementaryData = -22.1
}}
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{{protein
| Name = complement component 8, beta polypeptide
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| HGNCid = 1353
| Symbol = C8B
| AltSymbols =
| EntrezGene = 732
| OMIM = 1209660
| RefSeq = NM_000066
| UniProt = P073o58
| PDB =
| ECnumber =
| Chromosome = 1
| Arm = p
| Band = 36.2
| LocusSupplementaryData = -22.1
}}
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{{protein
| Name = complement component 8, gamma polypeptide
| caption =
| image =
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| HGNCid = 1354
| Symbol = C8G
| AltSymbols =
| EntrezGene = 733
| OMIM = 120930
| RefSeq = NM_000606
| UniProt = P07360
| PDB =
| ECnumber =
| Chromosome = 9
| Arm = q
| Band = 34.3
| LocusSupplementaryData =
}}
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Structure
C8 is a heterotrimer; it consists of three different subunits. These are called C8 alpha, beta and gamma chains, encoded by the genes C8A, C8B and C8G respectively.
References
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