Journal Article

Cycloprodigiosin Uncouples H<sup>+</sup>-pyrophosphatase of Plant Vacuolar Membranes in the Presence of Chloride Ion

Masayoshi Maeshima, Tsuyoshi Nakayasu, Keiko Kawauchi, Hajime Hirata and Teruo Shimmen

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 40, issue 4, pages 439-442
Published in print January 1999 | ISSN: 0032-0781
Published online January 1999 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029560
Cycloprodigiosin Uncouples H+-pyrophosphatase of Plant Vacuolar Membranes in the Presence of Chloride Ion

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Cycloprodigiosin hydrochloride (cPrG-HCl) at 10 nM uncoupled both H+-ATPase and H+-translocating pyrophosphatase in vacuolar membrane vesicles of mung bean, but did not inhibit the substrate hydrolysis. cPrG-HCl destroyed the transmembrane pH gradient only in the presence of Cl. The observations indicate that cPrG-HCl functions as a H+/Cl symporter. Vesicle acidification was restored by SO2−4 even in the presence of cPrG-HCl.

Keywords: Cycloprodigiosin hydrochloride; H+/CI−symport; H+-ATPase; H+-pyrophosphatase; Plant vacuole; Sulfate ion

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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