Open Access Articles- Top Results for COL4A4


SymbolsCOL4A4 ; CA44
External IDsOMIM120131 MGI104687 HomoloGene20071 GeneCards: COL4A4 Gene
RNA expression pattern
File:PBB GE COL4A4 214602 at tn.png
More reference expression data
RefSeq (mRNA)NM_000092NM_007735
RefSeq (protein)NP_000083NP_031761
Location (UCSC)Chr 2:
227.87 – 228.03 Mb
Chr 1:
82.45 – 82.59 Mb
PubMed search[1][2]

Collagen alpha-4(IV) chain is a protein that in humans is encoded by the COL4A4 gene.[1][2]

This gene encodes one of the six subunits of type IV collagen, the major structural component of basement membranes. This particular collagen IV subunit, however, is only found in a subset of basement membranes. Like the other members of the type IV collagen gene family, this gene is organized in a head-to-head conformation with another type IV collagen gene so that each gene pair shares a common promoter. Mutations in this gene are associated with type II autosomal recessive Alport syndrome (hereditary glomerulonephropathy) and with familial benign hematuria (thin basement membrane disease). Two transcripts, differing only in their transcription start sites, have been identified for this gene and, as is common for collagen genes, multiple polyadenylation sites are found in the 3' UTR.[2]

Disease Database

LOVD Alport gene variant databases (COL4A4, COL4A3, COL4A5)


  1. ^ Mariyama M, Zheng K, Yang-Feng TL, Reeders ST (Aug 1992). "Colocalization of the genes for the alpha 3(IV) and alpha 4(IV) chains of type IV collagen to chromosome 2 bands q35-q37". Genomics 13 (3): 809–13. PMID 1639407. doi:10.1016/0888-7543(92)90157-N. 
  2. ^ a b "Entrez Gene: COL4A4 collagen, type IV, alpha 4". 

Further reading


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