Methenyltetrahydromethanopterin cyclohydrolase
methenyltetrahydromethanopterin cyclohydrolase | |||||||||
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Identifiers | |||||||||
EC number | 3.5.4.27 | ||||||||
CAS number | 99533-50-3 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / EGO | ||||||||
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In enzymology, a methenyltetrahydromethanopterin cyclohydrolase (EC 3.5.4.27) is an enzyme that catalyzes the chemical reaction
- 5,10-methenyl-5,6,7,8-tetrahydromethanopterin + H2O 5-formyl-5,6,7,8-tetrahydromethanopterin
Thus, the two substrates of this enzyme are 5,10-methenyl-5,6,7,8-tetrahydromethanopterin and H2O, whereas its product is 5-formyl-5,6,7,8-tetrahydromethanopterin.
This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in cyclic amidines. The systematic name of this enzyme class is 5,10-methenyltetrahydromethanopterin 10-hydrolase (decyclizing). Other names in common use include 5,10-methenyltetrahydromethanopterin cyclohydrolase, N5,N10-methenyltetrahydromethanopterin cyclohydrolase, and methenyl-H4MPT cyclohydrolase. This enzyme participates in folate biosynthesis.
References
- Donnelly MI, Escalante-Semerena JC, Rinehart KL, Wolfe RS (1985). "Methenyl-tetrahydromethanopterin cyclohydrolase in cell extracts of Methanobacterium". Arch. Biochem. Biophys. 242 (2): 430–9. doi:10.1016/0003-9861(85)90227-9. PMID 4062290.