Abstract
The effect of disulfiram on succinate oxidase and succinate dehydrogenase activities of beef heart submitochondrial particles was studied. Results show that disulfiram inhibits both functions. Succinate and malonate suppress the inhibitory action of disulfiram when succinate dehydrogenase is stabilized in an active conformation. Disulfiram is not able to inhibit the enzyme when succinate dehydrogenase is inactivated by oxaloacetate. The inhibitory effect of disulfiram is reverted by the addition of dithiothreitol. From these results, it is proposed that disulfiram inhibits the utilization of succinate by a direct modification of an -SH group located in the catalytically active site of succinate dehydrogenase.
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Jay, D. Inhibition of membrane-bound succinate dehydrogenase by disulfiram. J Bioenerg Biomembr 23, 335–343 (1991). https://doi.org/10.1007/BF00762226
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DOI: https://doi.org/10.1007/BF00762226