Crystal Structure of the Productive Ternary Complex of Dihydropyrimidine Dehydrogenase with NADPH and 5-Iodouracil
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چکیده
منابع مشابه
Crystal structure of the productive ternary complex of dihydropyrimidine dehydrogenase with NADPH and 5-iodouracil. Implications for mechanism of inhibition and electron transfer.
Dihydroprymidine dehydrogenase catalyzes the first and rate-limiting step in pyrimidine degradation by converting pyrimidines to the corresponding 5,6- dihydro compounds. The three-dimensional structures of a binary complex with the inhibitor 5-iodouracil and two ternary complexes with NADPH and the inhibitors 5-iodouracil and uracil-4-acetic acid were determined by x-ray crystallography. In th...
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Dihydropyrimidine dehydrogenase (DPDase) catalyzed the debromination of 5-bromo-5,6-dihydrouracil (BrUH2) to uracil at pH 7.7 and 37 degrees C. The debrominating activity of DPDase was increased 5-fold by treatment with H2O2, whereas the dehydrogenating activity was inhibited by this treatment. The time course for increasing the debrominating activity by H2O2 was similar to that for decreasing ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2002
ISSN: 0021-9258
DOI: 10.1074/jbc.m111877200