Effect of NAD + on Malate Oxidation in Intact Plant Mitochondria

  • Tobin A
  • Djerdjour B
  • Journet E
  • et al.
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Abstract

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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Tobin, A., Djerdjour, B., Journet, E., Neuburger, M., & Douce, R. (1980). Effect of NAD + on Malate Oxidation in Intact Plant Mitochondria. Plant Physiology, 66(2), 225–229. https://doi.org/10.1104/pp.66.2.225

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