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Transporter Information:
Name: ATPase, H+ transporting, lysosomal accessory protein 1
Symbol: ATP6AP1
Locations: Xq28
Aliases: ORF, XAP-3, VATPS1, 16A, Ac45, XAP3, CF2
GenBank: D16469
Swiss-Prot: Q15904
Accession Number: NM_001183
Old Name: ATPase, H+ transporting, lysosomal (vacuolar proton pump), subunit 1
PubMed (8733135): Chen EY, Zollo M, Mazzarella R, Ciccodicola A, Chen CN, Zuo L, Heiner C,Burough F, Repetto M, Schlessinger D, D'Urso M. Long-range sequence analysis in Xq28: thirteen known and six candidate genes in219.4 kb of high GC DNA between the RCP/GCP and G6PD loci.Hum Mol Genet. 1996 May;5(5):659-68. PMID: 8733135 [PubMed - indexed for MEDLINE]

DNA comprising 219 447 bp was sequenced in nine cosmids and verified at > 99.9% precision. Of the standard repetitive elements, 187 Alus make up 20.6% of the sequence, but there were only 27 MERs (2.9%) and 17 L1 fragments (1.6%). This may be characteristic of such high GC (57%) regions. The sequence also includes an 11.3 kb tract duplicated with 99.2% identity at a distance of 38 kb. The region is 80-90% transcribed and 12.5% translated. Thirteen known genes and their exon-intron borders are all accurately predicted at least in part by GRAIL programs, as are six additional genes. From centromere to telomere, the orientation of transcription varies among the first eight genes, then runs centromeric to telomeric for the next five, and is in the opposite sense for the last six. Eighteen of the 19 genes are associated with CpG islands. Two islands are exact copies in the 11.3 kb repeat units, and could thus give rise to double dosage levels of an X-linked gene. Another island is associated with two genes transcribed in opposite directions. From the sequence data, three genes and their exon structure are inferred. One of them, previously associated with HEX2, is shown to be a different gene unrelated to hexokinases; a second gene, previously known by an EST, is plexin, from its 65.5% identity with the Xenopus analog; and a third is a subunit of a vacuolar H-ATPase, and is named VATPS1.

PubMed (8281148): Sedlacek Z, Korn B, Konecki DS, Siebenhaar R, Coy JF, Kioschis P, Poustka A. Construction of a transcription map of a 300 kb region around the human G6PDlocus by direct cDNA selection.Hum Mol Genet. 1993 Nov;2(11):1865-9. PMID: 8281148 [PubMed - indexed for MEDLINE]

A transcription map covering a 300 kb region around the G6PD gene in the human Xq28 region was constructed by the direct cDNA selection method and the analysis of the resulting region-specific enriched cDNA sublibrary. Seven new genes and two loci of endogenous retrovirus HERV-K were identified. The distribution of the genes across the region is strongly non-uniform and follows the non-uniform distribution of GpG islands in the area. While one of the novel genes was found to be highly homologous to bovine smg p25A GDP-dissociation inhibitor, the remaining genes did not detect any homology to known genes. The analysis of region-specific cDNA sublibraries represents a simple, rapid and efficient tool for the generation of a regional transcription map.

>sp|Q15904|VAS1_HUMAN V-type proton ATPase subunit S1 OS=Homo sapiens OX=9606 GN=ATP6AP1 PE=1 SV=2