ANXA2: a calcium-regulated membrane-binding protein whose affinity for calcium is greatly enhanced by anionic phospholipids. It binds two calcium ions with high affinity. Heterotetramer containing 2 light chains of S100A10 2 heavy chains of ANXA2. May cross-link plasma membrane phospholipids with actin and the cytoskeleton and be involved with exocytosis. 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: Lipid-binding; Motility/polarity/chemotaxis; Calcium-binding
Chromosomal Location of Human Ortholog: 15q22.2
Cellular Component: extrinsic to plasma membrane; extracellular space; protein complex; cell surface; lysosomal membrane; late endosome membrane; early endosome; lipid particle; cell cortex; lipid raft; extracellular matrix; ruffle; membrane; perinuclear region of cytoplasm; plasma membrane; melanosome; basement membrane; midbody; nucleus; sarcolemma; vesicle; endosome
Molecular Function: phosphatidylinositol-4,5-bisphosphate binding; protein binding; calcium-dependent phospholipid binding; phospholipase A2 inhibitor activity; cytoskeletal protein binding; calcium ion binding; calcium-dependent protein binding; Rab GTPase binding
Biological Process: positive regulation of fibroblast proliferation; fibrinolysis; collagen fibril organization; negative regulation of catalytic activity; protein heterotetramerization; positive regulation of vesicle fusion; angiogenesis; positive regulation of protein amino acid phosphorylation; positive regulation of binding; lipid raft formation; body fluid secretion; membrane budding
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