Annexin A1 (A1) Antibody – Mouse Monoclonal

Annexin I belongs to a family of Ca(2+)-dependent phospholipid binding proteins which have a molecular weight of approximately 35,000 to 40,000 and are preferentially located on the cytosolic face of the plasma membrane. Annexin I protein has an apparent relative molecular mass of 40 kDa, with phospholipase A2 inhibitory activity. Since phospholipase A2 is required for the biosynthesis of the potent mediators of inflammation, prostaglandins and leukotrienes, annexin I may have potential anti-inflammatory activity. [provided by RefSeq, Jul 2008]

ANXA1: a calcium/phospholipid-binding protein with which promotes membrane fusion and is involved in endocytosis. Has anti-inflammatory properties and inhibits phospholipase A2 activity. Accumulates on internalized vesicles after EGF-stimulated endocytosis, suggesting that it may be required for a late stage in inward vesiculation. Phosphorylated by PKC, EGFR and Chak1. Phosphorylation results in loss of the inhibitory activity. Annexins are a family of structurally related proteins whose common property is calcium-dependent binding to phospholipids. There are at least ten different annexins in mammalian species. Annexins do not contain signal peptides, yet some annexins (A1, A2 and A5) appear to be secreted in a physiologically regulated fashion.

Protein type: Calcium-binding; Lipid-binding

Chromosomal Location of Human Ortholog: 9q21.13

Cellular Component: extracellular space; protein complex; focal adhesion; cell surface; mast cell granule; basolateral plasma membrane; extracellular region; cornified envelope; cilium; cytoplasm; mitochondrial membrane; plasma membrane; nucleus; vesicle; endosome; sarcolemma

Molecular Function: protein binding, bridging; protein homodimerization activity; calcium-dependent phospholipid binding; phospholipase A2 inhibitor activity; calcium ion binding; calcium-dependent protein binding; helicase activity; protein binding; single-stranded RNA binding; double-stranded DNA-dependent ATPase activity; phospholipid binding; structural molecule activity; single-stranded DNA binding; receptor binding

Biological Process: prostate gland development; response to drug; response to peptide hormone stimulus; positive regulation of neutrophil apoptosis; gliogenesis; positive regulation of vesicle fusion; alpha-beta T cell differentiation; arachidonic acid secretion; neutrophil homeostasis; signal transduction; endocrine pancreas development; response to estradiol stimulus; DNA duplex unwinding; regulation of cell proliferation; keratinocyte differentiation; cell surface receptor linked signal transduction; insulin secretion; DNA strand renaturation; peptide cross-linking; cell motility; inflammatory response; response to X-ray; positive regulation of prostaglandin biosynthetic process; negative regulation of apoptosis