New insights in the regulation of the plant succinate dehydrogenase - on the role of the protonmotive force.

C. Affourtit, K. Krab, G.R. Leach, D.G. Whitehouse, A.L. Moore

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

Regulation of succinate dehydrogenase was investigated using tightly coupled potato tuber mitochondria in a novel fashion by simultaneously measuring the oxygen uptake rate and the ubiquinone (Q) reduction level. We found that the activation level of the enzyme is unambiguously reflected by the kinetic dependence of the succinate oxidation rate upon the Q-redox poise. Kinetic results indicated that succinate dehydrogenase is activated by both ATP (K
Original languageEnglish
Pages (from-to)32567-32574
JournalJournal of Biological Chemistry
Volume276
DOIs
Publication statusPublished - 2001

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