Induction of vacuolar Ca2+-ATPase and H+/Ca2+ exchange activity in yeast mutants lacking Pmr1, the Golgi Ca2+-ATPase

Valerie Marchi, Alexander Sorin, Ying Wei, Rajini Rao

Research output: Contribution to journalArticlepeer-review

Abstract

We have analyzed Ca2+ transport activity in defined subcellular fractions of an isogenic set of wild-type and mutant yeast. The results, together with measurements of polypeptide expression levels and promoter::reporter gene activity, show that the Golgi Ca2+-ATPase, Pmr1, is the major Ca2+ pump under normal growth conditions. In the absence of Pmr1, we show a massive, calcineurin-dependent compensatory induction of the vacuolar Ca2+-ATPase, Pmc1. In addition, H+/Ca2+ exchange activity, that may be distinct from the vacuolar exchanger Vcx1, is also increased. Copyright (C) 1999 Federation of European Biochemical Societies.

Original languageEnglish (US)
Pages (from-to)181-186
Number of pages6
JournalFEBS Letters
Volume454
Issue number3
DOIs
StatePublished - Jul 9 1999

Keywords

  • Ca-ATPase
  • Calcium homeostasis
  • H/Ca exchanger
  • PMC1 gene
  • PMR1 gene
  • Saccharomyces cerevisiae

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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