ATP6V0A4
Identifiers
Aliases	ATP6V0A4, A4, ATP6N1B, ATP6N2, RDRTA2, RTA1C, RTADR, STV1, VPH1, VPP2, ATPase H+ transporting V0 subunit a4, DRTA3
External IDs	OMIM: 605239 MGI: 2153480 HomoloGene: 39904 GeneCards: ATP6V0A4
Gene location (Human) Chr. Chromosome 7 (human)[1] Band 7q34 Start 138,706,294 bp[1] End 138,799,560 bp[1]
Gene location (Mouse) Chr. Chromosome 6 (mouse)[2] Band 6|6 B1 Start 38,025,418 bp[2] End 38,101,521 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in kidney renal medulla kidney tubule parotid gland skin of abdomen oral cavity minor salivary glands metanephric glomerulus thymus bronchial epithelial cell Top expressed in lip kidney morula proximal tubule esophagus blastocyst yolk sac secondary oocyte pharynx larynx More reference expression data BioGPS More reference expression data
Gene ontology Molecular function ATPase binding proton-transporting ATPase activity, rotational mechanism protein binding proton transmembrane transporter activity Cellular component integral component of membrane endosome proton-transporting V-type ATPase, V0 domain phagocytic vesicle membrane membrane vacuolar proton-transporting V-type ATPase, V0 domain plasma membrane apical part of cell brush border membrane lysosomal membrane apical plasma membrane brush border vacuolar proton-transporting V-type ATPase complex endosome membrane extracellular exosome Biological process insulin receptor signaling pathway excretion transferrin transport ossification vacuolar proton-transporting V-type ATPase complex assembly ion transport sensory perception of sound vacuolar acidification ion transmembrane transport ATP synthesis coupled proton transport regulation of pH phagosome acidification transport proton transmembrane transport Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 50617 140494 Ensembl ENSG00000105929 ENSMUSG00000038600 UniProt Q9HBG4 Q920R6 RefSeq (mRNA) NM_020632 NM_130840 NM_130841 NM_080467 RefSeq (protein) NP_065683 NP_570855 NP_570856 NP_536715 Location (UCSC) Chr 7: 138.71 – 138.8 Mb Chr 6: 38.03 – 38.1 Mb PubMed search [3] [4]
Wikidata
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V-type proton ATPase 116 kDa subunit a isoform 4 is an enzyme that in humans is encoded by the ATP6V0A4 gene.^[5][6][7]

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.^[7]

Interactions

ATP6V0A4 has been shown to interact with PFKM.^[8]