Background
This gene encodes a calcium-independent phospholipid-binding protein whose expression increases in serum-starved cells. This protein is a substrate for protein kinase C (PKC) phosphorylation and recruits polymerase I and transcript release factor (PTRF) to caveolae. Removal of this protein causes caveolae loss and its over-expression results in caveolae deformation and membrane tubulation.[provided by RefSeq, Sep 2009],
Function
function:May play a role in targeting PRKCA to caveolae.,induction:Up-regulated in asyncronously growing fibroblasts following serum deprivation but not following contact inhibition. Down-regulated during synchronous cell cycle re-entry.,miscellaneous:Binds phosphatidylserine (PS) in a calcium-independent manner. PS-binding is inhibited by phosphotidic acid and phosphatidylinositol. Does not bind phosphatidylcholine.,PTM:Phosphorylated on Ser residues.,PTM:The N-terminus is blocked.,similarity:Belongs to the PTRF/SDPR family.,subcellular location:Colocalizes with CAV1 to caveolae.,subunit:Binds to PRKCA in the presence of phosphatidylserine (By similarity). Interacts with MURC; this augments the transactivation of NPPA by MURC.,tissue specificity:Highly expressed in heart and lung, and expressed at lower levels in brain, kidney, liver, pancreas, placenta, and skeletal muscle.,
