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ATP6V1B2 is 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, three B, and two G subunits, as well as a C, D, E, F, and H subunit. The V1 domain contains the ATP catalytic site. The protein encoded by this gene is one of two V1 domain B subunit isoforms and is the only B isoform highly expressed in osteoclasts.
Gene Name: | ATPase, H+ transporting, lysosomal 56/58kDa, V1 subunit B2 |
Family/Subfamily: | Transporter , ATPase - V type |
Synonyms: | ATP6V1B2, ATP6B1B2, ATP6B2, V-ATPase subunit B 2, Vma2, VATB, VPP3, HO57, V-ATPase B2 subunit |
Target Sequences: | NM_001693 NP_001684.2 P21281 |
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