Gene: C2

Alternate names for this Gene: ARMD14|CO2

Gene Summary: Component C2 is a serum glycoprotein that functions as part of the classical pathway of the complement system. Activated C1 cleaves C2 into C2a and C2b. The serine proteinase C2a then combines with complement factor 4b to create the C3 or C5 convertase. Deficiency of C2 has been reported to associated with certain autoimmune diseases and SNPs in this gene have been associated with altered susceptibility to age-related macular degeneration. This gene localizes within the class III region of the MHC on the short arm of chromosome 6. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional transcript variants have been described in publications but their full-length sequence has not been determined.

Gene is located in Chromosome: 6

Location in Chromosome : 6p21.33

Description of this Gene: complement C2

Type of Gene: protein-coding

Gene: CYP21A2

Alternate names for this Gene: CA21H|CAH1|CPS1|CYP21|CYP21B|P450c21B

Gene Summary: This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and hydroxylates steroids at the 21 position. Its activity is required for the synthesis of steroid hormones including cortisol and aldosterone. Mutations in this gene cause congenital adrenal hyperplasia. A related pseudogene is located near this gene; gene conversion events involving the functional gene and the pseudogene are thought to account for many cases of steroid 21-hydroxylase deficiency. Two transcript variants encoding different isoforms have been found for this gene.

Gene is located in Chromosome: 6

Location in Chromosome : 6p21.33

Description of this Gene: cytochrome P450 family 21 subfamily A member 2

Type of Gene: protein-coding

Gene: C2-AS1

Alternate names for this Gene:

Gene Summary:

Gene is located in Chromosome:

Location in Chromosome :

Description of this Gene:

Type of Gene:

rs1042663 in C2;CYP21A2;C2-AS1 gene and Age related macular degeneration PMID 22694956 2012 Genome-wide association study of age-related macular degeneration identifies associated variants in the TNXB-FKBPL-NOTCH4 region of chromosome 6p21.3.

rs1042663 in C2;CYP21A2;C2-AS1 gene and Blood Protein Measurement PMID 29875488 2018 Genomic atlas of the human plasma proteome.

rs1042663 in C2;CYP21A2;C2-AS1 gene and Rheumatoid Arthritis PMID 19503088 2009 REL, encoding a member of the NF-kappaB family of transcription factors, is a newly defined risk locus for rheumatoid arthritis.

PMID 17804836 2007 TRAF1-C5 as a risk locus for rheumatoid arthritis--a genomewide study.

PMID 21156761 2011 A genome-wide association study suggests contrasting associations in ACPA-positive versus ACPA-negative rheumatoid arthritis.