Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A

Tavakoli N, Kluge C, Golldack D, Mimura T, Dietz K-J (2001)
PLANT JOURNAL 28(1): 51-59.

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The plant vacuolar proton pump can be subjected to reversible redox regulation in vitro. The redox-ependent activity change involves disulfide bridge formation not only in Vatp A, as reported for bovine V-ATPase, but also in the stalk subunit Vatp E. Microsomal membranes isolated from barley leaves were analysed for their activity of bafilomycin-sensitive ATP hydrolysis and proton pumping using quinacrine fluorescence quenching in vesicle preparations. ATP hydrolysis and proton pumping activity were inhibited by H2O2. H2O2-deactivated ATPase was reactivated by cysteine and glutathione. The glutathione concentration needed for half maximal reactivation was 1 mmol l(-1). The activity loss was accompanied by shifts in electrophoretic mobility of Vatp A and E which were reversed upon reductive reactivation. The redox-dependent shift was also seen with recombinant Vatp E, and was absent following site-directed mutagenesis of either of the two cys residues conserved throughout all plant Vatp E sequences. V-ATPase was also inhibited by oxidized thioredoxin. These results support the hypothesis that tuning of vacuolar ATPase activity can be mediated by redox control depending on the metabolic requirements.
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Tavakoli N, Kluge C, Golldack D, Mimura T, Dietz K-J. Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A. PLANT JOURNAL. 2001;28(1):51-59.
Tavakoli, N., Kluge, C., Golldack, D., Mimura, T., & Dietz, K. - J. (2001). Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A. PLANT JOURNAL, 28(1), 51-59. doi:10.1046/j.1365-313X.2001.01130.x
Tavakoli, N., Kluge, C., Golldack, D., Mimura, T., and Dietz, K. - J. (2001). Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A. PLANT JOURNAL 28, 51-59.
Tavakoli, N., et al., 2001. Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A. PLANT JOURNAL, 28(1), p 51-59.
N. Tavakoli, et al., “Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A”, PLANT JOURNAL, vol. 28, 2001, pp. 51-59.
Tavakoli, N., Kluge, C., Golldack, D., Mimura, T., Dietz, K.-J.: Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A. PLANT JOURNAL. 28, 51-59 (2001).
Tavakoli, N, Kluge, C, Golldack, Dortje, Mimura, T, and Dietz, Karl-Josef. “Reversible redox control of plant vacuolar H+-ATPase activity is related to disulfide bridge formation in subunit E as well as subunit A”. PLANT JOURNAL 28.1 (2001): 51-59.
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Cadmium-induced changes in vacuolar aspects of Arabidopsis thaliana.
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