Specific Inhibition of a Family 1A Dihydroorotate Dehydrogenase by Benzoate Pyrimidine Analogues

Journal of Medicinal Chemistry
2001.0

Abstract

Dihydroorotate dehydrogenases (DHODs) catalyze the conversion of dihydroorotate to orotate in de novo pyrimidine biosynthesis. We have found that 3,4-dihydroxybenzoate and 3,5-dihydroxybenzoate are competitive inhibitors vs dihydroorotate with the prototypical family 1A DHOD from Lactococcus lactis. The dissociation constants of these compounds, determined by spectral titrations, were similar to the dissociation constant of orotate, the enzymatic reaction product, suggesting that hydroxybenzoates could be developed into useful drugs for treating infections by certain protozoan parasites.

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