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VDAC2
Voltage-dependent anion-selective channel protein 2 is a protein that in humans is encoded by the ''VDAC2'' gene on chromosome 10. This protein is a voltage-dependent anion channel and shares high structural homology with the other VDAC isoforms. VDACs are generally involved in the regulation of cell metabolism, mitochondrial apoptosis, and spermatogenesis. Additionally, VDAC2 participates in cardiac contractions and pulmonary circulation, which implicate it in cardiopulmonary diseases.〔〔 VDAC2 also mediates immune response to infectious bursal disease (IBD).〔 == Structure == The three VDAC isoforms in human are highly conserved, particularly with respect to their 3D structure. VDACs form a wide β-barrel structure, inside of which the N-terminal resides to partially close the pore. The sequence of the VDAC2 isoform contains an abundance of cysteines, which allow for the formation of disulfide bridges and, ultimately, affect the flexibility of the β-barrel. VDACs also contain a mitochondrial targeting sequence for the protein's translocation to the outer mitochondrial membrane. In particular, VDAC2 possesses an N-terminal longer by 11 residues compared to the other two isoforms.〔
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