Aliases for ABCG2 Gene
- ATP Binding Cassette Subfamily G Member 2 (Junior Blood Group) 2 3 5
- ABCP 2 3 4
- BCRP 2 3 4
- MXR 2 3 4
- ATP-Binding Cassette, Sub-Family G (WHITE), Member 2 (Junior Blood Group) 2 3
- Broad Substrate Specificity ATP-Binding Cassette Transporter ABCG2 3 4
- Placenta-Specific ATP-Binding Cassette Transporter 3 4
- Mitoxantrone Resistance-Associated Protein 3 4
- Breast Cancer Resistance Protein 3 4
- Urate Exporter 3 4
- EST157481 2 3
- CDw338 3 4
- BCRP1 3 4
- CD338 2 3
- Multi Drug Resistance Efflux Transport ATP-Binding Cassette Sub-Family G (WHITE) Member 2 3
External Ids for ABCG2 Gene
Previous GeneCards Identifiers for ABCG2 Gene
The membrane-associated protein encoded by this gene is included in 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 White subfamily. Alternatively referred to as a breast cancer resistance protein, this protein functions as a xenobiotic transporter which may play a major role in multi-drug resistance. It likely serves as a cellular defense mechanism in response to mitoxantrone and anthracycline exposure. Significant expression of this protein has been observed in the placenta, which may suggest a potential role for this molecule in placenta tissue. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]
GeneCards Summary for ABCG2 Gene
ABCG2 (ATP Binding Cassette Subfamily G Member 2 (Junior Blood Group)) is a Protein Coding gene. Diseases associated with ABCG2 include Uric Acid Concentration, Serum, Quantitative Trait Locus 1 and Blood Group, Junior System. Among its related pathways are Acetaminophen Pathway (therapeutic doses), Pharmacokinetics and Erlotinib Pathway, Pharmacokinetics. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and ATPase activity. An important paralog of this gene is ABCG8.
UniProtKB/Swiss-Prot Summary for ABCG2 Gene
Broad substrate specificity ATP-dependent transporter of the ATP-binding cassette (ABC) family that actively extrudes a wide variety of physiological compounds, dietary toxins and xenobiotics from cells (PubMed:11306452, PubMed:12958161, PubMed:19506252, PubMed:20705604, PubMed:28554189, PubMed:30405239, PubMed:31003562). Involved in porphyrin homeostasis, mediating the export of protoporphyrin IX (PPIX) from both mitochondria to cytosol and cytosol to extracellular space, it also functions in the cellular export of heme (PubMed:20705604, PubMed:23189181). Also mediates the efflux of sphingosine-1-P from cells (PubMed:20110355). Acts as a urate exporter functioning in both renal and extrarenal urate excretion (PubMed:19506252, PubMed:20368174, PubMed:22132962, PubMed:31003562). In kidney, it also functions as a physiological exporter of the uremic toxin indoxyl sulfate (By similarity). Also involved in the excretion of steroids like estrone 3-sulfate/E1S, 3beta-sulfooxy-androst-5-en-17-one/DHEAS, and other sulfate conjugates (PubMed:12682043, PubMed:28554189, PubMed:30405239). Mediates the secretion of the riboflavin and biotin vitamins into milk (By similarity). Extrudes pheophorbide a, a phototoxic porphyrin catabolite of chlorophyll, reducing its bioavailability (By similarity). Plays an important role in the exclusion of xenobiotics from the brain (Probable). It confers to cells a resistance to multiple drugs and other xenobiotics including mitoxantrone, pheophorbide, camptothecin, methotrexate, azidothymidine, and the anthracyclines daunorubicin and doxorubicin, through the control of their efflux (PubMed:11306452, PubMed:12477054, PubMed:15670731, PubMed:18056989, PubMed:31254042). In placenta, it limits the penetration of drugs from the maternal plasma into the fetus (By similarity). May play a role in early stem cell self-renewal by blocking differentiation (By similarity).
ATP-binding cassette (ABC) transporters form one of the largest groups of paralogous protein families that have a wide diversity of functions and substrates. Specificity has been shown for small and large molecules, highly charged molecules and highly hydrophobic systems.