The Gastric H/K ATPase β Subunit Gene and Transcriptional Pathways in Acid-Secreting Epithelia of the Stomach and Kidney

  • Ian R. van Driel
  • Paul A. Gleeson
  • Seong-Seng Tan
  • Ban-Hock Toh
Conference paper
Part of the NATO ASI Series book series (NATO ASI, volume 89)


Stomach acid is produced by parietal cells and secreted into the gastric lumen for digestive and protective purposes. The gastric parietal cell has a highly developed acid secretory machinery that can maintain the pH of the gastric lumen at around pH 1 (Forte and Soil, 1993; Sachs et al., 1992; Faller et al., 1993; Rabon and Reuben, 1990). The central role of the gastric H/K ATPase in the secretion of gastric HC1 is undisputed. The protein is located in the membranes of the parietal cell tubulovesicles and secretory canaliculi. The mechanism of action and structure of the gastric H/K ATPase have been extensively reviewed in this volume and elsewhere. The protein is composed of two subunits, a catalytic α and a β subunit. The existence of the a subunit has been known for some time. The protein is 95 kDa and has a large number of membrane spanning domains (probably 8) (Sachs et al., 1992; Green and Stokes, 1992). The pß subunit was only recently discovered in a number of laboratories (Okamoto et al., 1990, Reuben et al. 1990, Shull, 1992, Toh et al, 1990). The 35 kDa protein core is highly glycosylated with N-linked glycans which may terminate in poly-N-acetyllactosamine structures (Callghan et al. 1990, 1992). The β subunit appears to be essential for membrane insertion, may contain intracellular trafficking signals and is required for functional activity (Horisberg et al., 1991; Gottardi and Caplan, 1993; Sachs et al., 1992)


Parietal Cell Fatty Acid Binding Protein Subunit Gene Pancreatic Acinar Cell ATPase Subunit 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Ian R. van Driel
    • 1
  • Paul A. Gleeson
    • 1
  • Seong-Seng Tan
    • 2
  • Ban-Hock Toh
    • 1
  1. 1.Department of Pathology and ImmunologyMonash University Medical SchoolPrahranAustralia
  2. 2.Department of AnatomyThe University of MelbourneParkvilleAustralia

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