InterPro : IPR021013

Name  ATPase, vacuolar ER assembly factor, Vma12 Short Name  ATPase_Vma12
Type  Family Description  Transmembrane ATPases are membrane-bound enzyme complexes/ion transporters that use ATP hydrolysis to drive the transport of protons across a membrane. Some transmembrane ATPases also work in reverse, harnessing the energy from a proton gradient, using the flux of ions across the membrane via the ATPase proton channel to drive the synthesis of ATP. There are several different types of transmembrane ATPases, which can differ in function (ATP hydrolysis and/or synthesis), structure (e.g., F-, V- and A-ATPases, which contain rotary motors) and in the type of ions they transport [, ]. The different types include:F-ATPases (F1F0-ATPases), which are found in mitochondria, chloroplasts and bacterial plasma membranes where they are the prime producers of ATP, using the proton gradient generated by oxidative phosphorylation (mitochondria) or photosynthesis (chloroplasts).V-ATPases (V1V0-ATPases), which are primarily found in eukaryotic and they function as proton pumps that acidify intracellular compartments and, in some cases, transport protons across the plasma membrane []. They are also found in bacteria [].A-ATPases (A1A0-ATPases), which are found in Archaea and function like F-ATPases, though with respect to their structure and some inhibitor responses, A-ATPases are more closely related to the V-ATPases [, ].P-ATPases (E1E2-ATPases), which are found in bacteria and in eukaryotic plasma membranes and organelles, and function to transport a variety of different ions across membranes.E-ATPases, which are cell-surface enzymes that hydrolyse a range of NTPs, including extracellular ATP.V-ATPases (also known as V1V0-ATPase or vacuolar ATPase) () are found in the eukaryotic endomembrane system, and in the plasma membrane of prokaryotes and certain specialised eukaryotic cells. V-ATPases hydrolyse ATP to drive a proton pump, and are involved in a variety of vital intra- and inter-cellular processes such as receptor mediated endocytosis, protein trafficking, active transport of metabolites, homeostasis and neurotransmitter release []. V-ATPases are composed of two linked complexes: the V1 complex (subunits A-H) contains the catalytic core that hydrolyses ATP, while the V0 complex (subunits a, c, c', c'', d) forms the membrane-spanning pore. V-ATPases may have an additional role in membrane fusion through binding to t-SNARE proteins [].The yeast vacuolar proton-translocating ATPase (V-ATPase) is the best characterised member of the V-ATPase family. A total of thirteen genes are required for encoding the subunits of the enzyme complex itself and an additional three for providing factors necessary for the assembly of the whole. Vma12 is one of these latter, all three of which are localised to the endoplasmic reticulum [].
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9 Publications

First Author Title Year Journal Volume Pages
Cross RL The evolution of A-, F-, and V-type ATP synthases and ATPases: reversals in function and changes in the H+/ATP coupling ratio. 2004 FEBS Lett 576 1-4
Rappas M Mechanisms of ATPases--a multi-disciplinary approach. 2004 Curr Protein Pept Sci 5 89-105
Toei M Regulation and isoform function of the V-ATPases. 2010 Biochemistry 49 4715-23
Grüber G New insights into structure-function relationships between archeal ATP synthase (A1A0) and vacuolar type ATPase (V1V0). 2008 Bioessays 30 1096-109
Schäfer G F-type or V-type? The chimeric nature of the archaebacterial ATP synthase. 1992 Biochim Biophys Acta 1101 232-5
Radax C F-and V-ATPases in the genus Thermus and related species. 1998 Syst Appl Microbiol 21 12-22
Wilkens S A structural model of the vacuolar ATPase from transmission electron microscopy. 2005 Micron 36 109-26
Bajjalieh S A new view of an old pore. 2005 Cell 121 496-7
Graham LA Assembly of the yeast vacuolar proton-translocating ATPase. 1999 J Bioenerg Biomembr 31 39-47



To cite PlanMine, please refer to the following publication:

Rozanski, A., Moon, H., Brandl, H., Martín-Durán, J. M., Grohme, M., Hüttner, K., Bartscherer, K., Henry, I., & Rink, J. C.
PlanMine 3.0—improvements to a mineable resource of flatworm biology and biodiversity
Nucleic Acids Research, gky1070. doi:10.1093/nar/gky1070 (2018)