ID   1.1.1.302
DE   2,5-diamino-6-(ribosylamino)-4(3H)-pyrimidinone 5'-phosphate reductase.
AN   2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate reductase.
CA   (1) 2,5-diamino-6-(1-D-ribitylamino)pyrimidin-4(3H)-one 5'-phosphate +
CA   NAD(+) = 2,5-diamino-6-(1-D-ribosylamino)pyrimidin-4(3H)-one 5'-phosphate
CA   + H(+) + NADH.
CA   (2) 2,5-diamino-6-(1-D-ribitylamino)pyrimidin-4(3H)-one 5'-phosphate +
CA   NADP(+) = 2,5-diamino-6-(1-D-ribosylamino)pyrimidin-4(3H)-one
CA   5'-phosphate + H(+) + NADPH.
CC   -!- The reaction proceeds in the opposite direction.
CC   -!- A step in riboflavin biosynthesis, NADPH and NADH function equally
CC       well as reductant.
CC   -!- Differs from EC 1.1.1.193 since it does not catalyze the reduction of
CC       5-amino-6-ribosylaminopyrimidine-2,4(1H,3H)-dione 5'-phosphate.
DR   O66747, RIB7_AQUAE ;  O28272, RIB7_ARCFU ;  Q6FU96, RIB7_CANGA ;
DR   Q6BII9, RIB7_DEBHA ;  Q757H6, RIB7_EREGS ;  Q6CJ61, RIB7_KLULA ;
DR   Q9P4B8, RIB7_KLUMA ;  Q58085, RIB7_METJA ;  O26337, RIB7_METTH ;
DR   P95872, RIB7_SACS2 ;  Q9P7L3, RIB7_SCHPO ;  P33312, RIB7_YEAST ;
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