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Plant proton pumps
Author(s) -
Gaxiola Roberto A.,
Palmgren Michael G.,
Schumacher Karin
Publication year - 2007
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2007.03.050
Subject(s) - endosome , endocytic cycle , proton pump , microbiology and biotechnology , atpase , diaphragm pump , vacuole , membrane , chemistry , v atpase , plant cell , electrochemical gradient , chemiosmosis , biochemistry , atp synthase , biophysics , biology , cell , enzyme , endocytosis , nanotechnology , materials science , micropump , cytoplasm , gene
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.