ATP6V1G3

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. [provided by RefSeq]

Full Name

ATPase, H+ transporting, lysosomal 13kDa, V1 subunit G3

Function

Catalytic subunit of the peripheral V1 complex of vacuolar ATPase (V-ATPase). V-ATPase is responsible for acidifying a variety of intracellular compartments in eukaryotic cells.

Biological Process

Cellular response to amino acid starvation Source: Reactome
Insulin receptor signaling pathway Source: Reactome
Ion transmembrane transport Source: Reactome
Phagosome acidification Source: Reactome
Transferrin transport Source: Reactome

Cellular Location

Cytosol; Plasma membrane; Vacuolar proton-transporting V-type ATPase complex