Synonyms: dihydroneopterin triphosphate synthase activity, GTP 7,8-8,9-dihydrolase activity, GTP 8-formylhydrolase activity, guanosine triphosphate 8-deformylase activity, guanosine triphosphate cyclohydrolase activity
Definition: Catalysis of the reaction: GTP + H2O = formate + 7,8-dihydroneopterin 3'-triphosphate.
GO:0003933 - GTP cyclohydrolase activity
Unification Links: GO:0003934
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