Literature DB >> 1847114

Vacuolar proton-pumping pyrophosphatase in Beta vulgaris shows vectorial activation by potassium.

J M Davies1, P A Rea, D Sanders.   

Abstract

Previous work with membrane vesicles has demonstrated an absolute dependence on K+ for proton translocation by the inorganic pyrophosphatase (H(+)-PPase: EC 3.6.1.1) from the vacuolar membrane (tonoplast) of higher plants. Using intact vacuoles from sugar beet (Beta vulgaris) storage tissue, we have monitored PP1-dependent currents by patch clamp in 'whole vacuole' mode. Serial K+ substitutions were made at both tonoplast faces. The results show that K+ activation occurs only at the cytosolic face.

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Year:  1991        PMID： 1847114     DOI： 10.1016/0014-5793(91)80085-h

Source DB:  PubMed          Journal:  FEBS Lett        ISSN： 0014-5793            Impact factor:   4.124


  9 in total

1.  Vacuolar H(+)-pumping ATPase variable transport coupling ratio controlled by pH.

Authors:  J M Davies; I Hunt; D Sanders
Journal:  Proc Natl Acad Sci U S A       Date:  1994-08-30       Impact factor: 11.205

2.  Kinetics of the Vacuolar H-Pyrophosphatase : The Roles of Magnesium, Pyrophosphate, and their Complexes as Substrates, Activators, and Inhibitors.

Authors:  R A Leigh; A J Pope; I R Jennings; D Sanders
Journal:  Plant Physiol       Date:  1992-12       Impact factor: 8.340

3.  Regulation of vacuolar h-pyrophosphatase by free calcium : a reaction kinetic analysis.

Authors:  P A Rea; C J Britten; I R Jennings; C M Calvert; L A Skiera; R A Leigh; D Sanders
Journal:  Plant Physiol       Date:  1992-12       Impact factor: 8.340

4.  Tris Is a Competitive Inhibitor of K+ Activation of the Vacuolar H+-Pumping Pyrophosphatase.

Authors:  R. Gordon-Weeks; V. D. Koren'kov; S. H. Steele; R. A. Leigh
Journal:  Plant Physiol       Date:  1997-07       Impact factor: 8.340

5.  Potassium transport into plant vacuoles energized directly by a proton-pumping inorganic pyrophosphatase.

Authors:  J M Davies; R J Poole; P A Rea; D Sanders
Journal:  Proc Natl Acad Sci U S A       Date:  1992-12-15       Impact factor: 11.205

6.  ATP, pH and Mg2+ modulate a cation current in Beta vulgaris vacuoles: a possible shunt conductance for the vacuolar H(+)-ATPase.

Authors:  J M Davies; D Sanders
Journal:  J Membr Biol       Date:  1995-05       Impact factor: 1.843

Review 7.  The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics.

Authors:  Mareike Jezek; Michael R Blatt
Journal:  Plant Physiol       Date:  2017-04-13       Impact factor: 8.340

8.  AVP2, a sequence-divergent, K(+)-insensitive H(+)-translocating inorganic pyrophosphatase from Arabidopsis.

Authors:  Y M Drozdowicz; J C Kissinger; P A Rea
Journal:  Plant Physiol       Date:  2000-05       Impact factor: 8.005

9.  Calcium uptake and proton transport by acidocalcisomes of Toxoplasma gondii.

Authors:  Peter Rohloff; Kildare Miranda; Juliany C F Rodrigues; Jianmin Fang; Melina Galizzi; Helmut Plattner; Joachim Hentschel; Silvia N J Moreno
Journal:  PLoS One       Date:  2011-04-25       Impact factor: 3.240
  9 in total

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