COL7A1: the alpha chain of type VII collagen, an extra-cellular basement membrane protein restricted to the zone beneath stratified squamous epithelia. Type VII collagen fibrils are composed of three identical alpha collagen chains. Forms anchoring fibrils, which may contribute to epithelial basement membrane organization and adherence by interacting with extracellular matrix (ECM) proteins such as type IV collagen. Dystrophic epidermolysis bullosa can result from defects in this protein or an autoimmune response made to type VII collagen. Homotrimer. Interacts with MIA3, facilitating its loading into transport carriers and subsequent secretion. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted, signal peptide; Secreted; Inhibitor; Extracellular matrix
Chromosomal Location of Human Ortholog: 3p21.1
Cellular Component: basement membrane; collagen type VII; endoplasmic reticulum lumen; ER to Golgi transport vesicle; ER-Golgi intermediate compartment membrane; extracellular matrix; extracellular region; extracellular space; Golgi membrane
Molecular Function: identical protein binding; protein binding; serine-type endopeptidase inhibitor activity
Biological Process: cell adhesion; collagen catabolic process; COPII coating of Golgi vesicle; epidermis development; ER to Golgi vesicle-mediated transport; extracellular matrix organization and biogenesis
Disease: Epidermolysis Bullosa Dystrophica, Autosomal Dominant; Epidermolysis Bullosa Dystrophica, Autosomal Recessive; Epidermolysis Bullosa Dystrophica, Pretibial; Epidermolysis Bullosa Pruriginosa; Epidermolysis Bullosa With Congenital Localized Absence Of Skin And Deformity Of Nails; Nail Disorder, Nonsyndromic Congenital, 8; Transient Bullous Dermolysis Of The Newborn
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