Integrin Alpha 3 (ITGA3) Antibody – Mouse Monoclonal

The protein encoded by this gene belongs to the family of integrins. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain, and function as cell surface adhesion molecules. This gene encodes alpha 3 subunit, which undergoes post-translational cleavage in the extracellular domain to yield disulfide-linked light and heavy chains that join with beta 1 subunit to form an integrin that interacts with many extracellular-matrix proteins. Alternatively spliced transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Oct 2008]

Function: Integrin alpha-3/beta-1 is a receptor for fibronectin, laminin, collagen, epiligrin, thrombospondin and CSPG4. Alpha-3/beta-1 may mediate with LGALS3 the stimulation by CSPG4 of endothelial cells migration. Ref.11

Subunit structure: Heterodimer of an alpha and a beta subunit. The alpha subunit is composed of a heavy and a light chain linked by a disulfide bond. Alpha-3 associates with beta-1. Interacts with HPS5. Ref.11

Subcellular location: Membrane; Single-pass type I membrane protein.

Tissue specificity: Isoform 1 is widely expressed. Isoform 2 is expressed in brain and heart. In brain, both isoforms are exclusively expressed on vascular smooth muscle cells, whereas in heart isoform 1 is strongly expressed on vascular smooth muscle cells, isoform 2 is detected only on endothelial vein cells. Ref.9

Post-translational modification: Isoform 1, but not isoform 2, is phosphorylated on serine residues. Phosphorylation increases after phorbol 12-myristate 13-acetate stimulation. Ref.9

Involvement in disease: Interstitial lung disease, nephrotic syndrome, and epidermolysis bullosa, congenital (ILNEB) [MIM:614748]: A multiorgan disorder characterized by congenital nephrotic syndrome, interstitial lung disease, and epidermolysis bullosa. The respiratory and renal features predominate, and lung involvement accounts for the lethal course of the disease.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.13

Sequence similarities: Belongs to the integrin alpha chain family.Contains 7 FG-GAP repeats.