Integrin Alpha M (ITGaM) Recombinant Protein

This gene encodes the integrin alpha M chain. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. This I-domain containing alpha integrin combines with the beta 2 chain (ITGB2) to form a leukocyte-specific integrin referred to as macrophage receptor 1 ('Mac-1'), or inactivated-C3b (iC3b) receptor 3 ('CR3'). The alpha M beta 2 integrin is important in the adherence of neutrophils and monocytes to stimulated endothelium, and also in the phagocytosis of complement coated particles. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

ITGAM: a single-pass type I membrane protein of the integrin alpha chain family. Implicated in various adhesive interactions of monocytes, macrophages and granulocytes as well as in mediating the uptake of complement-coated particles. Also known as CR-3, the receptor for the iC3b fragment of the third complement component. It probably recognizes the RGD peptide in C3b. A receptor for fibrinogen, factor X and ICAM1. Heterodimer of an alpha and a beta subunit. Alpha-M associates with beta-2. Predominantly expressed in monocytes and granulocytes.

Protein type: Motility/polarity/chemotaxis; Membrane protein, integral; Cell adhesion

Chromosomal Location of Human Ortholog: 16p11.2

Cellular Component: cell surface; plasma membrane; nucleus; integrin complex; external side of plasma membrane

Molecular Function: heparin binding; heparan sulfate proteoglycan binding; opsonin binding; protein binding; protein heterodimerization activity; metal ion binding; glycoprotein binding

Biological Process: integrin-mediated signaling pathway; neutrophil chemotaxis; extracellular matrix organization and biogenesis; microglia development; activated T cell proliferation; leukocyte migration during inflammatory response; cellular extravasation; toll-like receptor signaling pathway; innate immune response; cell adhesion; blood coagulation; leukocyte migration; toll-like receptor 4 signaling pathway

Disease: Systemic Lupus Erythematosus, Susceptibility To, 6