ATP6V1G2

This gene encodes a component of vacuolar ATPase (V-ATPase), a multisubunit enzyme that mediates acidification of intracellular compartments of eukaryotic cells. V-ATPase dependent 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 encoded protein is one of three V1 domain G subunit proteins. This gene had previous gene symbols of ATP6G and ATP6G2. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq]

Full Name

ATPase, H+ transporting, lysosomal 13kDa, V1 subunit G2

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
Proton transmembrane transport Source: InterPro
Regulation of macroautophagy Source: ParkinsonsUK-UCL
Transferrin transport Source: Reactome

Cellular Location

Melanosome. Highly enriched in late-stage melanosomes.