C1QB Chromosome 1

Complement C1q B chain
9 variants 9 Health Risk

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What This Gene Does
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]
Gene Info
Gene Group
"Complement system activation components|C1q domain containing"
Locus Type
gene with protein product
Location
1p36.12
Ensembl
ENSG00000173369
Associated Conditions (3)
Inborn genetic diseases
C1Q deficiency 2
C1Q deficiency
Key Variants
All Variants (9)
RSID Category Clinical Significance Conditions
RS147260497 Health Risk Conflicting classifications of pathogenicity Inborn genetic diseases, Inborn genetic diseases
RS1480028945 Health Risk Conflicting classifications of pathogenicity C1Q deficiency 2, C1Q deficiency 2
RS35477594 Health Risk Conflicting classifications of pathogenicity C1Q deficiency, C1Q deficiency 2, C1Q deficiency
RS867527641 Health Risk Conflicting classifications of pathogenicity Inborn genetic diseases, C1Q deficiency 2, Inborn genetic diseases
RS945618655 Health Risk Conflicting classifications of pathogenicity C1Q deficiency 2, C1Q deficiency 2
RS1064797108 Health Risk Likely pathogenic
RS34813378 Health Risk Likely pathogenic C1Q deficiency, C1Q deficiency
RS751172449 Health Risk Likely pathogenic C1Q deficiency 2, C1Q deficiency 2
RS1361922961 Health Risk Pathogenic C1Q deficiency 2, C1Q deficiency 2
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