SCP2

Non-specific lipid-transfer protein also known as sterol carrier protein 2 (SCP-2) or propanoyl-CoA C-acyltransferase is a is_associated_with::protein that in humans is encoded by the SCP2 is_associated_with::gene.

Function
This gene encodes two proteins: sterol carrier protein X (SCPx) and sterol carrier protein 2 (SCP2), as a result of transcription initiation from 2 independently regulated promoters. The transcript initiated from the proximal promoter encodes the longer SCPx protein, and the transcript initiated from the distal promoter encodes the shorter SCP2 protein, with the 2 proteins sharing a common is_associated_with::C-terminus. Evidence suggests that the SCPx protein is a is_associated_with::peroxisome-associated is_associated_with::thiolase that is involved in the oxidation of branched chain fatty acids, while the SCP2 protein is thought to be an intracellular lipid transfer protein. Alternative splicing of this gene produces multiple transcript variants, some encoding different isoforms. The full-length nature of all transcript variants has not been determined.

Clinical significance
This gene is highly expressed in organs involved in lipid metabolism, and may play a role in is_associated_with::Zellweger syndrome, in which cells are deficient in peroxisomes and have impaired is_associated_with::bile acid synthesis.

Interactions
SCP2 has been shown to interact with is_associated_with::Caveolin 1 and peroxisomal receptor is_associated_with::PEX5.