C1QB
Complement C1q subcomponent subunit B
Protein Summary
C1q associates with the proenzymes C1r and C1s to yield C1, the first component of the serum complement system. The collagen-like regions of C1q interact with the Ca(2+)-dependent C1r(2)C1s(2) proenzyme complex, and efficient activation of C1 takes place on interaction of the globular heads of C1q with the Fc regions of IgG or IgM antibody present in immune complexes. This gene encodes the B-chain polypeptide of serum complement subcomponent C1q, which associates with C1r and C1s to yield the first component of the serum complement system. C1q is composed of 18 polypeptide chains which include 6 A-chains, 6 B-chains, and 6 C-chains. Each chain contains an N-terminal collagen-like region and a C-terminal C1q globular domain. C1q deficiency is associated with lupus erythematosus and glomerulonephritis. [provided by RefSeq, Dec 2016]
- ENST00000314933
- ENSP00000313967
- ENSG00000173369
Most Knowledge About | Knowledge Value
(0 to 1 scale) | ||
|---|---|---|---|
PubMedID | 0.96 | ||
disease perturbation | 0.93 | ||
drug | 0.79 | ||
small molecule perturbation | 0.68 | ||
gene perturbation | 0.6 | ||
Protein Classes
IDG Development Level Summary
These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:
Pubmed score: 76.35 (req: < 5)
Gene RIFs: 32 (req: <= 3)
Antibodies: 248 (req: <= 50)
These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:
Pubmed score: 76.35 (req: >= 5)
Gene RIFs: 32 (req: > 3)
Antibodies: 248 (req: > 50)
- OR - satisfy the following criterion:
Gene Ontology Terms: 7
Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions
Active Ligand: 0
Target has at least one approved drug - AND - satisfies the preceding conditions
Active Drug: 0