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Updated: Oct 7, 2026

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
Published on: June 1, 2022
The 70-kDa peroxisomal membrane protein (PMP70), an ATP-binding cassette transporter
T Imanaka1, K Aihara, Y Suzuki
1Laboratory of Cell Biology, Department of Biological Chemistry, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan. imanaka@ms.toyama-mpu.ac.jp
Abstract:
The 70-kDa peroxisomal membrane protein (PMP70) is one of major components of peroxisomal membranes. In rodents, PMP70 is markedly induced by administration of hypolipidemic agents in parallel with peroxisome proliferation and the induction of peroxisomal fatty acid beta-oxidation enzymes. PMP70 is an ATP-binding cassette transporter, identified for the first time in intracellular membranes of eukaryotic cells. The authors' recent studies suggest that PMP70 is synthesized on free polysomes and posttranslationally inserted into peroxisomal membranes, and assembles as dimeric or oligomeric forms on peroxisomal membranes. PMP70 is suggested to be involved in metabolic transport of long-chain acyl-CoA across peroxisomal membranes.
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