Requires Mn2+ or Mg2+ for activity. Unlike EC 1.1.1.41, 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].
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
SYSTEMATIC NAME
IUBMB Comments
isocitrate:NADP+ oxidoreductase (decarboxylating)
Requires Mn2+ or Mg2+ for activity. Unlike EC 1.1.1.41, 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 [6]. The enzyme from some species can also use NAD+ but much more slowly [6,7].
86% of total activity in the cell, main factor for synthesis of 2-oxoglutarate. Enzyme and cytoplasmic aspartate aminotransferase are regulated oppositely and the catalytic activity of one enzyme can be stimulated concurrently with a decrease in the activity of the other
suppression of enzyme activity by small interfering RNA results in impairment of glucose-stimulated insulin secretion, attenuates glucose-induced increments in pyruvate cycling activity and in NADPH levels, and causes increases in lactate production
86% of total activity in the cell, main factor for synthesis of 2-oxoglutarate. Enzyme and cytoplasmic aspartate aminotransferase are regulated oppositely and the catalytic activity of one enzyme can be stimulated concurrently with a decrease in the activity of the other
suppression of enzyme activity by small interfering RNA results in impairment of glucose-stimulated insulin secretion, attenuates glucose-induced increments in pyruvate cycling activity and in NADPH levels, and causes increases in lactate production
the inhibitory effect of the Fe2+ and H2O2 mixture associated with the generation of hydroxyl radicals is lower in enzyme from ischemic heart compared to enzyme from normoxic heart
the inhibitory effect of the Fe2+ and H2O2 mixture associated with the generation of hydroxyl radicals is lower in enzyme from ischemic heart compared to enzyme from normoxic heart
pancreatic islet beta-cell, suppression of enzyme activity by small interfering RNA results in impairment of glucose-stimulated insulin secretion, attenuates glucose-induced increments in pyruvate cycling activity and in NADPH levels, and causes increases in lactate production
regulation of enzyme during heart ischemia. Ischemia results in increase in enzyme activity, enzyme from ischemic heart mitochondria demonstrates higher activation energy and lower thermal stability and differs in KM-value and regulation
86% of total activity in the cell, main factor for synthesis of 2-oxoglutarate. Enzyme and cytoplasmic aspartate aminotransferase are regulated oppositely and the catalytic activity of one enzyme can be stimulated concurrently with a decrease in the activity of the other
increase in enzyme activity during ischemia, enzyme from ischemic heart mitochondria demonstrates higher activation energy and lower thermal stability and differs in KM-value and regulation
transfection of H9c2 clonal myoblastic cells with small interfering RNA (siRNA) specific for IDPm markedly attenuates IDPm expression and substantially induces apoptosis, senescence, and hypertrophy as indicated by increased atrial natriuretic peptide gene expression, a marker of cardiomyocyte hypertrophy, and a larger cell size. Knockdown of IDPm expression results in the modulation of cellular and mitochondrial redox status, mitochondrial function, and cellular oxidative damage. The suppression of IDP expression by siRNA induces apoptosis and hypertrophy of cultured cardiomyocytes through the disruption of cellular redox balance. IDPm knockdown alters cellular redox status and induces oxidative damage. Apoptosis induced by IDPm knockdown is ROS-mediated. Substantially increased desmin and vimentin abundance is observed in IDPm siRNA-transfected H9c2 cells compared to the control cells. Mitochondrial fission and fusion involve enzymatic reactions mediated by large dynamin-associated GTPases. IDPm knockdown induces mitochondrial damage by altering the redox status
mitochondrial NADP+s-dependent isocitrate dehydrogenase (IDPm) functions as an antioxidant and antiapoptotic protein by supplying NADPH to antioxidant systems
knockdown of IDPm by siRNA in H9c2 cells, the suppression of IDPm expression by siRNA induces apoptosis and hypertrophy of cultured cardiomyocytes through the disruption of cellular redox balance, phenotype, overview
Localization of a mitochondrial type of NADP-dependent isocitrate dehydrogenase in kidney and heart of rat: an immunocytochemical and biochemical study
Cytosolic and mitochondrial isoforms of NADP+-dependent isocitrate dehydrogenases are expressed in cultured rat neurons, astrocytes, oligodendrocytes and microglial cells