期刊
MITOCHONDRION
卷 19, 期 -, 页码 206-213出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mito.2014.04.003
关键词
VDAC; Ion channel; Electrophysiology; Brownian Dynamics; Ion selectivity; Beta-barrel
资金
- ARC [20052]
- F.R.S.-FNRS [2.5020.11]
- High Performance Computing Center
- ULB and VUB (HPC cluster 'Hydra')
The mitochondrial voltage-dependent a nion-selective channel (VDAC) is the major permeation pathway for small ions and metabolites. Although a wealth of electrophysiological data has been obtained on different VDAC species, the physical mechanisms of their ionic selectivity are still elusive. We addressed this issue using electrophysiological experiments performed on plant VDAC A simple macroscopic electrodiffusion model accounting for ion diffusion and for an effective fixed charge of the channel describes well its selectivity. Brownian Dynamics simulations of ion permeation performed on plant and mammalian VDACs point to the role of specific charged residues located at about the middle of the pore. (C) 2014 Elsevier B.V. and Mitochondria Research Society. All rights reserved.
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