VDAC3

VDAC3 (Voltage-Dependent Anion Channel 3) is a member of the mitochondrial porin family located in the outer mitochondrial membrane and contributes to the exchange of ATP and other small metabolites across mitochondria-associated pathways^[1][2]. Mechanistically, current evidence highlights a specialized role for VDAC3 in the cellular response to oxidative stress, where depletion of VDAC3 promotes uncontrolled accumulation of mitochondrial reactive oxygen species (ROS) and increases susceptibility to oxidative injury induced by redox-active compounds and respiratory complex I inhibitors^[3]. The redox-sensitive cysteine residues of VDAC3 are critical for this protective function, supporting the concept that VDAC3 acts as a sensor and regulator of mitochondrial redox homeostasis^[3][4]. In disease-relevant and experimental models, altered VDAC3 activity has been associated with mitochondrial dysfunction, increased ROS levels, and defects in cellular stress adaptation, making the protein a useful target for studying oxidative stress-related pathophysiology^[3][5]. Compared with the closely related isoforms VDAC1 and VDAC2, VDAC3 exhibits distinct structural and biophysical properties, including unique cysteine-rich features and lower affinity for several cytosolic interaction partners, indicating isoform-specific functions rather than a redundant role in mitochondrial biology^[2][4]. Furthermore, VDAC3 has been implicated in centrosome-associated processes, including regulation of centriole assembly, extending its biological relevance beyond metabolite transport and mitochondrial homeostasis^[5]. No widely established selective VDAC3 agonists or inhibitors are currently supported by the cited literature, and most experimental studies instead rely on genetic depletion, knockout systems, or cysteine-directed mutational approaches to investigate VDAC3 function^[3][4].

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