May act as a scaffolding protein within caveolar membranes. Interacts directly with G-protein alpha subunits and can functionally regulate their activity. Acts as an accessory protein in conjunction with CAV1 in targeting to lipid rafts and driving caveolae formation. The Ser-36 phosphorylated form has a role in modulating mitosis in endothelial cells. Positive regulator of cellular mitogenesis of the MAPK signaling pathway. Required for the insulin-stimulated nuclear translocation and activation of MAPK1 and STAT3, and the subsequent regulation of cell cycle progression.
Function:
May act as a scaffolding protein within caveolar membranes. Interacts directly with G-protein alpha subunits and can functionally regulate their activity. Acts as an accessory protein in conjunction with CAV1 in targeting to lipid rafts and driving caveolae formation. The Ser-36 phosphorylated form has a role in modulating mitosis in endothelial cells. Positive regulator of cellular mitogenesis of the MAPK signaling pathway. Required for the insulin-stimulated nuclear translocation and activation of MAPK1 and STAT3, and the subsequent regulation of cell cycle progression.
Subunit:
Monomer or homodimer.
Subcellular Location:
Nucleus. Cytoplasm. Golgi apparatus membrane; Peripheral membrane protein. Cell membrane; Peripheral membrane protein. Membrane, caveola; Peripheral membrane protein.
Tissue Specificity:
Expressed in endothelial cells, smooth muscle cells, skeletal myoblasts and fibroblasts.
Post-translational modifications:
Phosphorylated on serine and tyrosine residues. CAV1 promotes phosphorylation on Ser-23 which then targets the complex to the plasma membrane, lipid rafts and caveolae. Phosphorylation on Ser-36 appears to modulate mitosis in endothelial cells (By similarity). Phosphorylation on both Tyr-19 and Tyr-27 is required for insulin-induced 'Ser-727' phosphorylation of STAT3 and its activation. Phosphorylation on Tyr-19 is required for insulin-induced phosphorylation of MAPK1 and DNA binding of STAT3. Tyrosine phosphorylation is induced by both EGF and insulin.
Similarity:
Belongs to the caveolin family.
SWISS:
P51636
Gene ID:
858
Database links:
Entrez Gene: 858 Human
Entrez Gene: 12390 Mouse
Entrez Gene: 100362824 Rat
Entrez Gene: 363425 Rat
Omim: 601048 Human
SwissProt: O46550 Dog
SwissProt: P51636 Human
SwissProt: Q9WVC3 Mouse
SwissProt: Q2IBC5 Rat
Unigene: 212332 Human
Unigene: 603096 Human
Unigene: 396075 Mouse
Unigene: 81070 Rat
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