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Information on EC - isocitrate dehydrogenase (NADP+)

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IUBMB Comments
Requires Mn2+ or Mg2+ for activity. Unlike EC, isocitrate dehydrogenase (NAD+), oxalosuccinate can be used as a substrate. In eukaryotes, isocitrate dehydrogenase exists in two forms: an NAD+-linked enzyme found only in mitochondria and displaying allosteric properties, and a non-allosteric, NADP+-linked enzyme that is found in both mitochondria and cytoplasm . The enzyme from some species can also use NAD+ but much more slowly [6,7].
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The enzyme appears in viruses and cellular organisms
Reaction Schemes
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isocitrate dehydrogenase 1, nadp-isocitrate dehydrogenase, nadp-dependent isocitrate dehydrogenase, isocitrate dehydrogenase-1, nadp-icdh, nadp-idh, nadp+-dependent isocitrate dehydrogenase, nadp-linked isocitrate dehydrogenase, nadp-specific isocitrate dehydrogenase, nadp+-specific isocitrate dehydrogenase, more
isocitrate + NADP+ = 2-oxoglutarate + CO2 + NADPH + H+
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isocitrate + NADP+ = oxalosuccinate + NADPH + H+
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oxalosuccinate = 2-oxoglutarate + CO2
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