GTP cyclohydrolase II activity (Q21199032)
Catalysis of the reaction: GTP + 3 H(2)O = 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-pyrimidine + diphosphate + formate + 3 H(+).
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aliases GTP-8-formylhydrolase activity
 GO:0003935
 GTP 7,8-8,9-dihydrolase (diphosphate-forming)
description Catalysis of the reaction: GTP + 3 H(2)O = 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-pyrimidine + diphosphate + formate + 3 H(+).

External Links
(P665) R00425
(P686) GO:0003935
(P2892) C1149726