FEBS Letters
Volume 581, Issue 12 , Pages 2204-2214, 25 May 2007

Plant proton pumps☆

Edited by Ulf-Ingo Flügge and Julian Schroeder

  • Roberto A. Gaxiola

      Affiliations

    • University of Connecticut, 1390 Storrs Road, U-163, Storrs, CT 06269-4163, USA
    • Corresponding Author InformationCorresponding author. Fax: +860 486 6866.
    • ,
  • Michael G. Palmgren

      Affiliations

    • Department of Plant Biology, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
    • Fax: +45 3528 3365.
    • ,
  • Karin Schumacher

      Affiliations

    • ZMBP-Plant Physiology, Universität Tübingen, Auf der Morgenstelle 1, 72076 Tübingen, Germany
    • Fax: +49 7071 29 3287.

Received 31 January 2007; received in revised form 20 March 2007; accepted 21 March 2007. published online 29 March 2007.

Abstract 

Chemiosmotic circuits of plant cells are driven by proton (H+) gradients that mediate secondary active transport of compounds across plasma and endosomal membranes. Furthermore, regulation of endosomal acidification is critical for endocytic and secretory pathways. For plants to react to their constantly changing environments and at the same time maintain optimal metabolic conditions, the expression, activity and interplay of the pumps generating these H+ gradients have to be tightly regulated. In this review, we will highlight results on the regulation, localization and physiological roles of these H+- pumps, namely the plasma membrane H+-ATPase, the vacuolar H+-ATPase and the vacuolar H+-PPase.

Keywords: H+-ATPase, Plasma membrane, Vacuolar, H+-PPases, Proton pumps

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☆ This review will be divided in three sections. The first section describes the state of plasma membrane H+-ATPase research and proposes a novel mechanism of H+-ATPase regulation. The second section reports current vacuolar H+-ATPase research including its recently identified role in endomembrane protein trafficking. The third section focuses on the H+-PPase and new evidence that H+-PPases function in regulating plant growth and development.

PII: S0014-5793(07)00322-5

doi:10.1016/j.febslet.2007.03.050

FEBS Letters
Volume 581, Issue 12 , Pages 2204-2214, 25 May 2007

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