GTP cyclohydrolase IV activity
Catalysis of the reaction: GTP + H2O = 7,8-dihydroneopterin 2',3'-cyclic phosphate + diphosphate + formate + H+. This activity is part of the biosynthesis of methanopterin in Archaea, and requires Fe2+.
GO:0003933
GTP cyclohydrolase activity
is_a
Fe(2+)-dependent archaeal-specific GTP cyclohydrolase activity
exact
MptA activity
narrow
archaeal-specific GTP cyclohydrolase activity
exact