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Review
. 2008 Jul;38(7-8):833-62.
doi: 10.1080/00498250701883514.

MRP class of human ATP binding cassette (ABC) transporters: historical background and new research directions

Y Toyoda  1 , Y Hagiya, T Adachi, K Hoshijima, M T Kuo, T Ishikawa
Affiliations
Review

MRP class of human ATP binding cassette (ABC) transporters: historical background and new research directions

Y Toyoda et al. Xenobiotica. 2008 Jul.

Abstract

1. The adenosine triphosphate (ATP) binding cassette (ABC) transporters form one of the largest protein families encoded in the human genome, and more than 48 genes encoding human ABC transporters have been identified and sequenced. It has been reported that mutations of ABC protein genes are causative in several genetic disorders in humans. 2. Many human ABC transporters are involved in membrane transport of drugs, xenobiotics, endogenous substances or ions, thereby exhibiting a wide spectrum of biological functions. According to the new nomenclature of human ABC transporter genes, the 'ABCC' gene sub-family comprises three classes involving multidrug resistance-associated proteins (MRPs), sulfonylurea receptors (SURs), and a cystic fibrosis transmembrane conductance regulator (CFTR). 3. Molecular cloning studies have identified a total of ten members of the human MRP class including ABCC11, ABCC12, and ABCC13 (pseudo-gene) that have recently been characterized. 4. This review addresses the historical background and discovery of the ATP-driven xenobiotic export pumps (GS-X pumps) encoded by MRP genes, biological functions of ABC transporters belonging to the MRP class, and regulation of gene expression of MRPs by oxidative stress.

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