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- W2018832587 endingPage "1154" @default.
- W2018832587 startingPage "1146" @default.
- W2018832587 abstract "Mitochondrial membrane permeabilization can be a rate limiting step of apoptotic as well as necrotic cell death. Permeabilization of the outer mitochondrial membrane (OM) and/or inner membrane (IM) is, at least in part, mediated by the permeability transition pore complex (PTPC). The PTPC is formed in the IM/OM contact site and contains the two most abundant IM and OM proteins, adenine nucleotide translocator (ANT, in the IM) and voltage-dependent anion channel (VDAC, in the OM), the matrix protein cyclophilin D, which can interact with ANT, as well as apoptosis-regulatory proteins from the Bax/Bcl-2 family. Here we discuss that ANT has two opposite functions. On the one hand, ANT is a vital, specific antiporter which accounts for the exchange of ATP and ADP on IM. On the other hand, ANT can form a non-specific pore, as this has been shown by electrophysiological characterization of purified ANT reconstituted into synthetic lipid bilayers or by measuring the permeabilization of proteoliposomes containing ANT. Pore formation by ANT is induced by a variety of different agents (e.g. Ca(2+), atractyloside, thiol oxidation, the pro-apoptotic HIV-1 protein Vpr, etc.) and is enhanced by Bax and inhibited by Bcl-2, as well as by ADP. In isolated mitochondria, pore formation by ANT leads to an increase in IM permeability to solutes up to 1500 Da, swelling of the mitochondrial matrix, and OM permeabilization, presumably due to physical rupture of OM. Although alternative mechanisms of mitochondrial membrane permeabilization may exist, ANT emerges as a major player in the regulation of cell death. Cell Death and Differentiation (2000) 7, 1146 - 1154" @default.
- W2018832587 created "2016-06-24" @default.
- W2018832587 creator A5011757516 @default.
- W2018832587 creator A5014537968 @default.
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- W2018832587 creator A5042091947 @default.
- W2018832587 creator A5075296559 @default.
- W2018832587 creator A5034811604 @default.
- W2018832587 date "2000-12-01" @default.
- W2018832587 modified "2023-10-06" @default.
- W2018832587 title "Permeabilization of the mitochondrial inner membrane during apoptosis: impact of the adenine nucleotide translocator" @default.
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