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GTP Cyclohydrolase

(GTP cyclohydrolase I) or GTP 7,8-8,9-dihydrolase (pyrophosphate-forming) (GTP cyclohydrolase II). An enzyme group that hydrolyzes the imidazole ring of GTP, releasing carbon-8 as formate. Two C-N bonds are hydrolyzed and the pentase unit is isomerized. This is the first step in the synthesis of folic acid from GTP. EC 3.5.4.16 (GTP cyclohydrolase I) and EC 3.5.4.25 (GTP cyclohydrolase II).

Year introduced: 1991(1975)

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Subheadings:

Tree Number(s): D08.811.277.151.300

MeSH Unique ID: D006136

Registry Number: EC 3.5.4.16

Entry Terms:

  • Cyclohydrolase, GTP
  • 7,8-Dihydroneopterintriphosphate Synthetase
  • 7,8 Dihydroneopterintriphosphate Synthetase
  • Synthetase, 7,8-Dihydroneopterintriphosphate
  • GTP 8-Formylhydrolase
  • 8-Formylhydrolase, GTP
  • GTP 8 Formylhydrolase
  • GTP Dihydrolase
  • Dihydrolase, GTP
  • GTP Ring-Opening Enzyme
  • GTP Ring Opening Enzyme
  • Ring-Opening Enzyme, GTP
  • GTP Cyclohydrolase I
  • Cyclohydrolase I, GTP
  • GTP Cyclohydrolase II
  • Cyclohydrolase II, GTP

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