ID 1.3.1.1 DE dihydrouracil dehydrogenase (NAD(+)). CA (1) 5,6-dihydrouracil + NAD(+) = H(+) + NADH + uracil. CA (2) 5,6-dihydrothymine + NAD(+) = H(+) + NADH + thymine. CC -!- The enzyme was originally discovered in the uracil-fermenting CC bacterium, Clostridium uracilicum, which utilizes uracil and thymine CC as nitrogen and carbon sources for growth. CC -!- Since then the enzyme was found in additional organisms including CC Alcaligenes eutrophus, Pseudomonas strains and Escherichia coli. DR Q8X643, PREA_ECO57 ; P25889, PREA_ECOLI ; Q8ZNL7, PREA_SALTY ; DR Q8X645, PRET_ECO57 ; P76440, PRET_ECOLI ; Q8Z5A6, PRET_SALTI ; DR Q8ZNL8, PRET_SALTY ; //