UNIPROT #

P49817

PROTEIN NAME

Caveolin-1

GENE NAME

Cav1

SYNONYMS

Cav1

SEQUENCE SIMILARITIES

Belongs to the caveolin family.

TISSUE SPECIFICITY

Adipose tissue, lung, heart, skeletal muscle, stomach, small bowel, kidney, spleen and testis (at protein level).

POST-TRANSLATIONAL MODIFICATION

The N-terminus of both isoforms are blocked.; Phosphorylated at Tyr-14 by ABL1 in response to oxidative stress.; Ubiquitinated. Undergo monoubiquitination and multi- and/or polyubiquitination. Monoubiquitination of N-terminal lysines promotes integration in a ternary complex with UBXN6 and VCP which promotes oligomeric CAV1 targeting to lysosomes for degradation.

SUBCELLULAR LOCATION

Golgi apparatus membrane; Peripheral membrane protein. Membrane raft. Golgi apparatus, trans-Golgi network. Note=Colocalized with DPP4 in membrane rafts. Potential hairpin-like structure in the membrane. Membrane protein of caveolae (By similarity).

FUNCTION

May act as a scaffolding protein within caveolar membranes (By similarity). Forms a stable heterooligomeric complex with CAV2 that targets to lipid rafts and drives caveolae formation. Mediates the recruitment of CAVIN proteins (CAVIN1/2/3/4) to the caveolae. Interacts directly with G-protein alpha subunits and can functionally regulate their activity (By similarity). Involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. Its binding to DPP4 induces T-cell proliferation and NF-kappa-B activation in a T-cell receptor/CD3-dependent manner (By similarity). Recruits CTNNB1 to caveolar membranes and may regulate CTNNB1-mediated signaling through the Wnt pathway. Negatively regulates TGFB1-mediated activation of SMAD2/3 by mediating the internalization of TGFBR1 from membrane rafts leading to its subsequent degradation (By similarity).