COL4A3

Type IV collagen, the major structural component of basement membranes, is a multimeric protein composed of 3 alpha subunits. These subunits are encoded by 6 different genes, alpha 1 through alpha 6, each of which can form a triple helix structure with 2 other subunits to form type IV collagen. This gene encodes alpha 3. In the Goodpasture syndrome, autoantibodies bind to the collagen molecules in the basement membranes of alveoli and glomeruli. The epitopes that elicit these autoantibodies are localized largely to the non-collagenous C-terminal domain of the protein. A specific kinase phosphorylates amino acids in this same C-terminal region and the expression of this kinase is upregulated during pathogenesis. This gene is also linked to an autosomal recessive form of Alport syndrome. The mutations contributing to this syndrome are also located within the exons that encode this C-terminal region. 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. [provided by RefSeq, Jun 2010]

Description

Collagen type IV alpha 3 chain

Tissue specificity

Tissue enhanced (retina)

Subcell location

Endoplasmic reticulum, Vesicles

Predicted location

Intracellular, Secreted to extracellular matrix

Protein family

Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Plasma proteins
Predicted intracellular proteins
Predicted secreted proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)

Chromosome

2 (227164624 - 227314792)

Ensembl ID

ENSG00000169031  (ver. 103.38)

Orthologs

Mouse Col4a3: ENSMUSG00000079465

UniProt

Q01955

neXtProt

NX_Q01955

Human splice variants
Mouse splice variants

Protein structure