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Voltage-dependent anion channels (VDACs) are conserved proteins of the mitochondria. We have functionally compared  Arabidopsis  VDACs using  Saccharomyces cerevisiae Δpor1  and M3 yeast system. VDAC (1, 2, and 4) were able to restore  Δpor1  growth in elevated temperature, in oxidative and salt stresses, whereas VDAC3 only partially rescued  Δpor1  in these conditions. The ectopic expression of  VDAC  (1, 2, 3, and 4) in mutant yeast recapitulated the mitochondrial membrane potential thus, enabled it to maintain reactive oxygen species homeostasis. Overexpression of these VDACs ( AtVDACs)  in M3 strain did not display any synergistic or antagonistic activity with the native yeast VDAC1 (ScVDAC1). Collectively, our data suggest that  Arabidopsis  VDACs are involved in regulating respiration, reactive oxygen species homeostasis, and stress tolerance in yeast.

frontiers in plant science

Arabidopsis Mitochondrial Voltage-Dependent Anion Channels Are Involved in Maintaining Reactive Oxygen Species Homeostasis, Oxidative and Salt Stress Tolerance in Yeast