ID   1.5.4.1
DE   pyrimidodiazepine synthase.
CA   2-amino-6-acetyl-3,7,8,9-tetrahydro-3H-pyrimido[4,5-b][1,4]diazepin-4-one
CA   + glutathione disulfide + H2O = 6-pyruvoyl-5,6,7,8-tetrahydropterin +
CA   2 glutathione.
CC   -!- In the reverse direction of reaction, the reduction of 6-pyruvoyl-
CC       tetrahydropterin is accompanied by the opening of the 6-membered
CC       pyrazine ring and the formation of the 7-membered diazepine ring.
CC   -!- The pyrimidodiazepine involved is an acetyldihydro derivative.
CC   -!- Involved in the formation of the eye pigment drosopterin in
CC       Drosophila melanogaster.
DR   Q9VSL3, SEPIA_DROME;
//