Aliases for COL4A1 Gene
External Ids for COL4A1 Gene
Previous GeneCards Identifiers for COL4A1 Gene
This gene encodes a type IV collagen alpha protein. Type IV collagen proteins are integral components of basement membranes. This gene shares a bidirectional promoter with a paralogous gene on the opposite strand. The protein consists of an amino-terminal 7S domain, a triple-helix forming collagenous domain, and a carboxy-terminal non-collagenous domain. It functions as part of a heterotrimer and interacts with other extracellular matrix components such as perlecans, proteoglycans, and laminins. In addition, proteolytic cleavage of the non-collagenous carboxy-terminal domain results in a biologically active fragment known as arresten, which has anti-angiogenic and tumor suppressor properties. Mutations in this gene cause porencephaly, cerebrovascular disease, and renal and muscular defects. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]
GeneCards Summary for COL4A1 Gene
COL4A1 (Collagen Type IV Alpha 1 Chain) is a Protein Coding gene. Diseases associated with COL4A1 include Retinal Arteries, Tortuosity Of and Angiopathy, Hereditary, With Nephropathy, Aneurysms, And Muscle Cramps. Among its related pathways are Collagen chain trimerization and Integrin Pathway. Gene Ontology (GO) annotations related to this gene include extracellular matrix structural constituent and extracellular matrix constituent conferring elasticity. An important paralog of this gene is COL4A5.
UniProtKB/Swiss-Prot Summary for COL4A1 Gene
Type IV collagen is the major structural component of glomerular basement membranes (GBM), forming a 'chicken-wire' meshwork together with laminins, proteoglycans and entactin/nidogen.
Arresten, comprising the C-terminal NC1 domain, inhibits angiogenesis and tumor formation. The C-terminal half is found to possess the anti-angiogenic activity. Specifically inhibits endothelial cell proliferation, migration and tube formation. Inhibits expression of hypoxia-inducible factor 1alpha and ERK1/2 and p38 MAPK activation. Ligand for alpha1/beta1 integrin.