Play a major role in cholesterol homeostasis. Is critical for the uptake of cholesterol across the plasma membrane of the intestinal enterocyte. Is the direct molecular target of ezetimibe, a drug that inhibits cholesterol absorbtion. Lack of activity leads to multiple lipid transport defects. The protein may have a function in the transport of multiple lipids and their homeostasis, and may play a critical role in regulating lipid metabolism. Interacts with RAB11A, MYO5B and RAB11FIP2. Interaction with RAB11A, MYO5B and RAB11FIP2 is required for proper transport to the plasma membrane upon cholesterol depletion. Expression is decreased in Caco-2 cells upon PPARD activation. Widely expressed. Expressed in liver. Also expressed in small intestine, pancreas, kidney, lung, pancreas, spleen, heart, gall bladder, brain, testis, stomach and muscle. Belongs to the patched family. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Membrane protein, multi-pass
Cellular Component: cytoplasmic vesicle membrane; brush border membrane; apical plasma membrane; integral to membrane; plasma membrane
Molecular Function: protein binding; hedgehog receptor activity; myosin V binding; drug binding; Rab GTPase binding
Biological Process: response to drug; cholesterol transport; cholesterol absorption; lipoprotein metabolic process; cholesterol biosynthetic process; sterol transport
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.