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Reference: Budzinska M, et al. (2009) The TOM complex is involved in the release of superoxide anion from mitochondria. J Bioenerg Biomembr 41(4):361-7

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Abstract


Available data indicate that superoxide anion (O (2) (*-) ) is released from mitochondria, but apart from VDAC (voltage dependent anion channel), the proteins involved in its transport across the mitochondrial outer membrane still remain elusive. Using mitochondria of the yeast Saccharomyces cerevisiae mutant depleted of VDAC (Deltapor1 mutant) and the isogenic wild type, we studied the role of the TOM complex (translocase of the outer membrane) in the efflux of O (2) (*-) from the mitochondria. We found that blocking the TOM complex with the fusion protein pb(2)-DHFR decreased O (2) (*-) release, particularly in the case of Deltapor1 mitochondria. We also observed that the effect of the TOM complex blockage on O (2) (*-) release from mitochondria coincided with the levels of O (2) (*-) release as well as with levels of Tom40 expression in the mitochondria. Thus, we conclude that the TOM complex participates in O (2) (*-) release from mitochondria.

Reference Type
Journal Article
Authors
Budzinska M, Galganska H, Karachitos A, Wojtkowska M, Kmita H
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