The 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 White subfamily. The protein encoded by this gene functions as a half-transporter to limit intestinal absorption and promote biliary excretion of sterols. It is expressed in a tissue-specific manner in the liver, colon, and intestine. This gene is tandemly arrayed on chromosome 2, in a head-to-head orientation with family member ABCG8. Mutations in this gene may contribute to sterol accumulation and atherosclerosis, and have been observed in patients with sitosterolemia.[3]
Interactive pathway map
Click on genes, proteins and metabolites below to link to respective articles.[§ 1]
Schmitz G, Langmann T, Heimerl S (Oct 2001). "Role of ABCG1 and other ABCG family members in lipid metabolism". Journal of Lipid Research. 42 (10): 1513–20. PMID11590207.
Shulenin S, Schriml LM, Remaley AT, Fojo S, Brewer B, Allikmets R, Dean M (2001). "An ATP-binding cassette gene (ABCG5) from the ABCG (White) gene subfamily maps to human chromosome 2p21 in the region of the Sitosterolemia locus". Cytogenetics and Cell Genetics. 92 (3–4): 204–8. doi:10.1159/000056903. PMID11435688.
Hubacek JA, Berge KE, Cohen JC, Hobbs HH (Oct 2001). "Mutations in ATP-cassette binding proteins G5 (ABCG5) and G8 (ABCG8) causing sitosterolemia". Human Mutation. 18 (4): 359–60. doi:10.1002/humu.1206. PMID11668628.
Lam CW, Cheng AW, Tong SF, Chan YW (Feb 2002). "Novel donor splice site mutation of ABCG5 gene in sitosterolemia". Molecular Genetics and Metabolism. 75 (2): 178–80. doi:10.1006/mgme.2001.3285. PMID11855938.
Heimerl S, Langmann T, Moehle C, Mauerer R, Dean M, Beil FU, von Bergmann K, Schmitz G (Aug 2002). "Mutations in the human ATP-binding cassette transporters ABCG5 and ABCG8 in sitosterolemia". Human Mutation. 20 (2): 151. doi:10.1002/humu.9047. PMID12124998.
Remaley AT, Bark S, Walts AD, Freeman L, Shulenin S, Annilo T, Elgin E, Rhodes HE, Joyce C, Dean M, Santamarina-Fojo S, Brewer HB (Jul 2002). "Comparative genome analysis of potential regulatory elements in the ABCG5-ABCG8 gene cluster". Biochemical and Biophysical Research Communications. 295 (2): 276–82. doi:10.1016/S0006-291X(02)00652-6. PMID12150943.
Graf GA, Yu L, Li WP, Gerard R, Tuma PL, Cohen JC, Hobbs HH (Nov 2003). "ABCG5 and ABCG8 are obligate heterodimers for protein trafficking and biliary cholesterol excretion". The Journal of Biological Chemistry. 278 (48): 48275–82. doi:10.1074/jbc.M310223200. PMID14504269.
Kajinami K, Brousseau ME, Nartsupha C, Ordovas JM, Schaefer EJ (Apr 2004). "ATP binding cassette transporter G5 and G8 genotypes and plasma lipoprotein levels before and after treatment with atorvastatin". Journal of Lipid Research. 45 (4): 653–6. doi:10.1194/jlr.M300278-JLR200. PMID14703505.
Freeman LA, Kennedy A, Wu J, Bark S, Remaley AT, Santamarina-Fojo S, Brewer HB (Jul 2004). "The orphan nuclear receptor LRH-1 activates the ABCG5/ABCG8 intergenic promoter". Journal of Lipid Research. 45 (7): 1197–206. doi:10.1194/jlr.C400002-JLR200. PMID15121760.
Yu L, Gupta S, Xu F, Liverman AD, Moschetta A, Mangelsdorf DJ, Repa JJ, Hobbs HH, Cohen JC (Mar 2005). "Expression of ABCG5 and ABCG8 is required for regulation of biliary cholesterol secretion". The Journal of Biological Chemistry. 280 (10): 8742–7. doi:10.1074/jbc.M411080200. PMID15611112.