This gene encodes a component of vacuolarATPase (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.[2]
References
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Forgac M (May 1999). "Structure and properties of the vacuolar (H+)-ATPases". The Journal of Biological Chemistry. 274 (19): 12951–4. doi:10.1074/jbc.274.19.12951. PMID10224039.
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Kawasaki-Nishi S, Nishi T, Forgac M (Jun 2003). "Proton translocation driven by ATP hydrolysis in V-ATPases". FEBS Letters. 545 (1): 76–85. doi:10.1016/S0014-5793(03)00396-X. PMID12788495.
Morel N (Oct 2003). "Neurotransmitter release: the dark side of the vacuolar-H+ATPase". Biology of the Cell / Under the Auspices of the European Cell Biology Organization. 95 (7): 453–7. doi:10.1016/S0248-4900(03)00075-3. PMID14597263.
Brown D, Lui B, Gluck S, Sabolić I (Oct 1992). "A plasma membrane proton ATPase in specialized cells of rat epididymis". The American Journal of Physiology. 263 (4 Pt 1): C913–6. PMID1415677.
Smith AN, Borthwick KJ, Karet FE (Sep 2002). "Molecular cloning and characterization of novel tissue-specific isoforms of the human vacuolar H(+)-ATPase C, G and d subunits, and their evaluation in autosomal recessive distal renal tubular acidosis". Gene. 297 (1–2): 169–77. doi:10.1016/S0378-1119(02)00884-3. PMID12384298.