PMID: 24366439Dec 25, 2013Paper

Extensive protein-protein interactions involving UDP-glucuronosyltransferase (UGT) 2B7 in human liver microsomes

Drug Metabolism and Pharmacokinetics
Ryoichi Fujiwara, Tomoo Itoh

Abstract

UDP-glucuronosyltransferase (UGT) 2B7 is a membrane protein that catalyzes glucuronidation of endogenous and exogenous substrates. Because UGTs are expressed in the endoplasmic reticulum (ER), their substrates and metabolites need to be transported through the ER membrane. However, insight into the mechanism underlying the transport of substrates/metabolites of UGTs through the ER membrane has not been elucidated. Metabolosome is a functional unit of metabolism consisting of multiple metabolism-related proteins. UGTs might form a metabolosome to facilitate the transport of their substrates and/or metabolites through the ER membrane. In the present study, therefore, extensive protein-protein interactions involving UGT2B7 were determined by a shotgun analysis of immunoprecipitate. Our shotgun analysis revealed that 92 proteins were immunoprecipitated with anti-UGT2B7 antibody in human liver microsomes. We further determined that 42 proteins out of the 92 proteins were specifically immunoprecipitated with the anti-UGT2B7 antibody. In addition to UGT2B7, other microsomal enzymes such as UGT1A, CYP3A4, CYP1A2, and a monoamine oxidase, were included in the list of proteins immunoprecipitated with the anti-UGT2B7 antibody, suggesting ...Continue Reading

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Citations

Dec 17, 2014·Pharmacology Research & Perspectives·Ryoichi Fujiwara, Tomoo Itoh
Nov 9, 2016·Frontiers in Pharmacology·Ryoichi FujiwaraMiki Nakajima
Feb 7, 2019·Physiological Reviews·Robyn MeechPeter I Mackenzie
Feb 22, 2017·Frontiers in Pharmacology·Michèle RouleauChantal Guillemette

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