Aliases for ABCB4 Gene
External Ids for ABCB4 Gene
Previous Symbols for ABCB4 Gene
The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance as well as antigen presentation. This gene encodes a full transporter and member of the p-glycoprotein family of membrane proteins with phosphatidylcholine as its substrate. The function of this protein has not yet been determined; however, it may involve transport of phospholipids from liver hepatocytes into bile. Alternative splicing of this gene results in several products of undetermined function. [provided by RefSeq, Jul 2008]
GeneCards Summary for ABCB4 Gene
ABCB4 (ATP-Binding Cassette, Sub-Family B (MDR/TAP), Member 4) is a Protein Coding gene. Diseases associated with ABCB4 include gallbladder disease 1 and cholestasis, progressive familial intrahepatic 3. Among its related pathways are Metabolism and Metabolism. GO annotations related to this gene include ATPase activity, coupled to transmembrane movement of substances and xenobiotic-transporting ATPase activity. An important paralog of this gene is ABCB11.
UniProtKB/Swiss-Prot for ABCB4 Gene
Mediates ATP-dependent export of organic anions and drugs from the cytoplasm. Hydrolyzes ATP with low efficiency. Not capable of conferring drug resistance. Mediates the translocation of phosphatidylcholine across the canalicular membrane of the hepatocyte