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ATP6V0A4
Introduction
V-type proton ATPase 116 kDa subunit a isoform 4 is an enzyme that in humans is encoded by the ATP6V0A4 gene.[1][2][3]
Function
Function
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. This gene is one of four genes in man and mouse that encode different isoforms of the a subunit. Alternatively spliced transcript variants encoding the same protein have been described. Mutations in this gene are associated with renal tubular acidosis associated with preserved hearing.[3]
References
References
- ↑ Karet FE, Finberg KE, Nayir A, Bakkaloglu A, Ozen S, Hulton SA, Sanjad SA, Al-Sabban EA, Medina JF, Lifton RP (Jan 2000). “Localization of a gene for autosomal recessive distal renal tubular acidosis with normal hearing (rdRTA2) to 7q33-34”. Am. J. Hum. Genet. 65 (6): 1656–65. doi:10.1086/302679. PMC 1288376. PMID 10577919. Check date values in:
|year= / |date= mismatch(help) - ↑ Smith AN, Skaug J, Choate KA, Nayir A, Bakkaloglu A, Ozen S, Hulton SA, Sanjad SA, Al-Sabban EA, Lifton RP, Scherer SW, Karet FE (Oct 2000). “Mutations in ATP6N1B, encoding a new kidney vacuolar proton pump 116-kD subunit, cause recessive distal renal tubular acidosis with preserved hearing”. Nat. Genet. 26 (1): 71–5. doi:10.1038/79208. PMID 10973252.
- ↑ 3.0 3.1 “Entrez Gene: ATP6V0A4 ATPase, H+ transporting, lysosomal V0 subunit a4”.
- ↑ Su Y, Zhou A, Al-Lamki RS, Karet FE (May 2003). “The a-subunit of the V-type H+-ATPase interacts with phosphofructokinase-1 in humans”. J. Biol. Chem. 278 (22): 20013–8. doi:10.1074/jbc.M210077200. PMID 12649290.
External links
External links
- Human ATP6V0A4 genome location and ATP6V0A4 gene details page in the UCSC Genome Browser.
Further reading
Further reading
- Finbow ME, Harrison MA (1997). “The vacuolar H+-ATPase: a universal proton pump of eukaryotes”. Biochem. J. 324 (3): 697–712. doi:10.1042/bj3240697. PMC 1218484. PMID 9210392.
- Stevens TH, Forgac M (1997). “Structure, function and regulation of the vacuolar (H+)-ATPase”. Annu. Rev. Cell Dev. Biol. 13: 779–808. doi:10.1146/annurev.cellbio.13.1.779. PMID 9442887.
- Nelson N, Harvey WR (1999). “Vacuolar and plasma membrane proton-adenosinetriphosphatases”. Physiol. Rev. 79 (2): 361–85. PMID 10221984.
- Forgac M (1999). “Structure and properties of the vacuolar (H+)-ATPases”. J. Biol. Chem. 274 (19): 12951–4. doi:10.1074/jbc.274.19.12951. PMID 10224039.
- Kane PM (1999). “Introduction: V-ATPases 1992-1998”. J. Bioenerg. Biomembr. 31 (1): 3–5. doi:10.1023/A:1001884227654. PMID 10340843.
- Wieczorek H, Brown D, Grinstein S, Ehrenfeld J, Harvey WR (1999). “Animal plasma membrane energization by proton-motive V-ATPases”. BioEssays. 21 (8): 637–48. doi:10.1002/(SICI)1521-1878(199908)21:8<637::AID-BIES3>3.0.CO;2-W. PMID 10440860.
- Brown D, Breton S (2000). “H(+)V-ATPase-dependent luminal acidification in the kidney collecting duct and the epididymis/vas deferens: vesicle recycling and transcytotic pathways”. J. Exp. Biol. 203 (Pt 1): 137–45. PMID 10600682.
- Nishi T, Forgac M (2002). “The vacuolar (H+)-ATPases–nature’s most versatile proton pumps”. Nat. Rev. Mol. Cell Biol. 3 (2): 94–103. doi:10.1038/nrm729. PMID 11836511.
- Kawasaki-Nishi S, Nishi T, Forgac M (2003). “Proton translocation driven by ATP hydrolysis in V-ATPases”. FEBS Lett. 545 (1): 76–85. doi:10.1016/S0014-5793(03)00396-X. PMID 12788495.
- Morel N (2003). “Neurotransmitter release: the dark side of the vacuolar-H+ATPase”. Biol. Cell. 95 (7): 453–7. doi:10.1016/S0248-4900(03)00075-3. PMID 14597263.