4.5 Article

VDAC2-specific cellular functions and the underlying structure

期刊

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbamcr.2016.04.020

关键词

VDAC2; Mitochondria; Sarcoplasmic reticulum; Calcium; Apoptosis; Bid; Bak; Bax

资金

  1. NIH [GM59419]

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Voltage Dependent Anion-selective Channel 2 (VDAC2) contributes to oxidative metabolism by sharing a role in solute transport across the outer mitochondrial membrane (OMM) with other isoforms of the VDAC family, VDAC1 and VDAC3. Recent studies revealed that VDAC2 also has a distinctive role in mediating sarcoplasmic reticulum to mitochondria local Ca2+ transport at least in cardiomyocytes, which is unlikely to be explained simply by the expression level of VDAC2. Furthermore, a strictly isoform-dependent VDAC2 function was revealed in the mitochondrial import and OMM-permeabilizing function of pro-apoptotic Bcl-2 family proteins, primarily Bak in many cell types. In addition, emerging evidence indicates a variety of other isoform-specific engagements for VDAC2. Since VDAC isoforms display 75% sequence similarity, the distinctive structure underlying VDAC2-specific functions is an intriguing problem. In this paper we summarize studies of VDAC2 structure and functions, which suggest a fundamental and exclusive role for VDAC2 in health and disease. This article is part of a Special Issue entitled: Mitochondrial Channels edited by Pierre Sonveaux, Pierre Maechler and Jean-Claude Martinou. (C) 2016 Elsevier B.V. All rights reserved.

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