VDAC2: Proteins and Enzymes

Forms a channel through the mitochondrial outer membrane that allows diffusion of small hydrophilic molecules. The channel adopts an open conformation at low or zero membrane potential and a closed conformation at potentials above 30-40 mV. The open state has a weak anion selectivity whereas the closed state is cation-selective. Interacts with hexokinases. It is present in the outer mitochondrial membrane. There are 4 isoforms as result of alternative splicing. Expressed in all tissues examined. Consists mainly of membrane spanning sided beta sheets. Belongs to the eukaryotic mitochondrial porin family.