Protein: Non-selective voltage-gated ion channel VDAC1 (Outer mitochondrial membrane protein porin 1) (Plasmalemmal porin) (Porin 31HL) (Porin 31HM) (Voltage-dependent anion-selective channel protein 1) (VDAC-1) (hVDAC1) (P21796)
Organism: Homo sapiens (Human)
Function: Forms a channel through the mitochondrial outer membrane and also the plasma membrane. The channel at the outer mitochondrial membrane allows diffusion of small hydrophilic molecules; in the plasma membrane it is involved in cell volume regulation and apoptosis. It 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. Binds various signaling molecules, including the sphingolipid ceramide, the phospholipid phosphatidylcholine, and the sterol cholesterol. In depolarized mitochondria, acts downstream of PRKN and PINK1 to promote mitophagy or prevent apoptosis; polyubiquitination by PRKN promotes mitophagy, while monoubiquitination by PRKN decreases mitochondrial calcium influx which ultimately inhibits apoptosis. May participate in the formation of the permeability transition pore complex (PTPC) responsible for the release of mitochondrial products that triggers apoptosis. May mediate ATP export from cells.
Subcellular location: Mitochondrion outer membrane {ECO:0000269|PubMed:10661876, ECO:0000269|PubMed:31015432, ECO:0000269|PubMed:31206022, ECO:0000269|PubMed:7539795}; Multi-pass membrane protein {ECO:0000269|PubMed:18755977, ECO:0000269|PubMed:18832158, ECO:0000269|PubMed:27641616}. Cell membrane {ECO:0000269|PubMed:25168729, ECO:0000269|PubMed:25296756}; Multi-pass membrane protein {ECO:0000269|PubMed:18755977, ECO:0000269|PubMed:18832158}. Membrane raft {ECO:0000269|PubMed:25168729}; Multi-pass membrane protein {ECO:0000269|PubMed:18755977, ECO:0000269|PubMed:18832158}. Note=Found in a complex with HSPA9 and VDAC1 at the endoplasmic reticulum-mitochondria contact sites. {ECO:0000250|UniProtKB:Q9Z2L0}.
InterPro domains:
- IPR001925: Porin, eukaryotic type (family) [3-282]
- IPR023614: Porin domain superfamily (homologous_superfamily) [1-283]
- IPR027246: Eukaryotic porin/Tom40 (family) [4-276]
Sequence:
MAVPPTYADLGKSARDVFTKGYGFGLIKLDLKTKSENGLEFTSSGSANTETTKVTGSLETKYRWTEYGLTFTEKWNTDNTLGTEITVEDQLARGLKLTFDSSFSPNTGKKNAKIKTGYKREHINLGCDMDFDIAGPSIRGALVLGYEGWLAGYQMNFETAKSRVTQSNFAVGYKTDEFQLHTNVNDGTEFGGSIYQKVNKKLETAVNLAWTAGNSNTRFGIAAKYQIDPDACFSAKVNNSSLIGLGYTQTLKPGIKLTLSALLDGKNVNAGGHKLGLGLEFQA
Predicted GO terms:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005215 (transporter activity), GO:0022857 (transmembrane transporter activity), GO:0005515 (protein binding), GO:0015075 (monoatomic ion transmembrane transporter activity), GO:0022803 (passive transmembrane transporter activity), GO:0005216 (monoatomic ion channel activity), GO:0008509 (monoatomic anion transmembrane transporter activity), GO:0015267 (channel activity), GO:0022839 (monoatomic ion gated channel activity), GO:0005253 (monoatomic anion channel activity), GO:0022836 (gated channel activity), GO:0005244 (voltage-gated monoatomic ion channel activity), GO:0008308 (voltage-gated monoatomic anion channel activity), GO:0022832 (voltage-gated channel activity)
Biological Process (BP): GO:0008150 (biological process), GO:0051179 (localization), GO:0051234 (establishment of localization), GO:0006810 (transport), GO:0071702 (organic substance transport), GO:0071705 (nitrogen compound transport), GO:0015851 (nucleobase transport), GO:0006863 (purine nucleobase transport)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031975 (envelope), GO:0016020 (membrane), GO:0005615 (extracellular space), GO:0005737 (cytoplasm), GO:0005576 (extracellular region), GO:0031090 (organelle membrane), GO:0031967 (organelle envelope), GO:0005739 (mitochondrion), GO:0043229 (intracellular organelle), GO:0019867 (outer membrane), GO:0070062 (extracellular exosome), GO:0043227 (membrane-bounded organelle), GO:0043230 (extracellular organelle), GO:0065010 (extracellular membrane-bounded organelle), GO:0005740 (mitochondrial envelope), GO:0031968 (organelle outer membrane), GO:0043231 (intracellular membrane-bounded organelle), GO:0098588 (bounding membrane of organelle), GO:0031982 (vesicle), GO:0031966 (mitochondrial membrane), GO:0005741 (mitochondrial outer membrane), GO:1903561 (extracellular vesicle), GO:0005634 (nucleus)