ID   1.5.4.1
DE   Pyrimidodiazepine synthase.
CA   A pyrimidodiazepine + glutathione disulfide + H(2)O = 6-pyruvoyl-
CA   tetrahydropterin + 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.
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