Effect of NAD+ on Malate Oxidation in Intact Plant Mitochondria | Zendy

Alyson K. Tobin | Zendy; Bahia Djerdjour | Zendy; EtiennePascal Journet | Zendy; Michel Neuburger | Zendy; Roland Douce | Zendy

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Effect of NAD⁺ on Malate Oxidation in Intact Plant Mitochondria

Author(s) -

Alyson K. Tobin,

Bahia Djerdjour,

EtiennePascal Journet,

Michel Neuburger,

Roland Douce

Publication year - 1980

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.66.2.225

Subject(s) - nad+ kinase , mitochondrion , biochemistry , chemistry , malate dehydrogenase , biology , enzyme

Potato tuber mitochondria oxidizing malate respond to NAD(+) addition with increased oxidation rates, whereas mung bean hypocotyl mitochondria do not. This is traced to a low endogenous content of NAD(+) in potato mitochondria, which prove to take up added NAD(+). This mechanism concentrates NAD(+) in the matrix space. Analyses for oxaloacetate and pyruvate (with pyruvate dehydrogenase blocked) are consistent with regulation of malate oxidation by the internal NAD(+)/NADH ratio.

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