ENTRY       EC 3.5.4.27
NAME        Methenyltetrahydromethanopterin cyclohydrolase
CLASS       Hydrolases
            Acting on carbon-nitrogen bonds, other than peptide bonds
            In cyclic amidines
SYSNAME     5,10-Methenyltetrahydromethanopterin 10-hydrolase (decyclizing)
REACTION    5,10-Methenyl-5,6,7,8-tetrahydromethanopterin + H2O =
            N5-Formyl-5,6,7,8-tetrahydromethanopterin
SUBSTRATE   5,10-Methenyl-5,6,7,8-tetrahydromethanopterin
            H2O
PRODUCT     N5-Formyl-5,6,7,8-tetrahydromethanopterin
COMMENT     Methanopterin is a pterin analogue. The enzyme is involved in the
            formation of methane from CO2 in Methanobacterium
            thermoautotrophicum.
PATHWAY     PATH: MAP00790  Folate biosynthesis
GENES       MJA: MJ1636
            MTH: MTH773(mch)
DBLINKS     University of Geneva ENZYME DATA BANK: 3.5.4.27
            WIT (What Is There) Metabolic Reconstruction: 3.5.4.27
///