Species Human Entrez 127124 | Human Mouse Ensembl n/a | |
Aliases ATP6V1G3, ATP6G3, Vma10, ATPase H+ transporting V1 subunit G3 External IDs MGI: 2450548 HomoloGene: 13630 GeneCards: ATP6V1G3 | ||
V-type proton ATPase subunit G 3 is an enzyme that in humans is encoded by the ATP6V1G3 gene.
Function
This gene encodes a component of vacuolar ATPase (V-ATPase), a multisubunit enzyme that mediates acidification of eukaryotic intracellular organelles. V-ATPase dependent organelle acidification is necessary for such intracellular processes as protein sorting, zymogen activation, receptor-mediated endocytosis, and synaptic vesicle proton gradient generation. V-ATPase is composed of a cytosolic V1 domain and a transmembrane V0 domain. The V1 domain consists of three A and three B subunits, two G subunits plus the C, D, E, F, and H subunits. The V1 domain contains the ATP catalytic site. The V0 domain consists of five different subunits: a, c, c', c'' and d. Additional isoforms of many of the V1 and V0 subunit proteins are encoded by multiple genes or alternatively spliced transcript variants. This gene encodes one of three G subunit proteins. Transcript variants encoding different isoforms have been found for this gene.