CATH Classification

Domain Context

CATH Clusters

Superfamily 3.30.1130.10
Functional Family GTP cyclohydrolase 1

Enzyme Information

3.5.4.16
GTP cyclohydrolase I.
based on mapping to UniProt P22288
GTP + H(2)O = formate + 2-amino-4-hydroxy-6-(erythro-1,2,3- trihydroxypropyl)-dihydropteridine triphosphate.
-!- The reaction involves hydrolysis of two C-N bonds and isomerization of the pentose unit; the recyclization may be non-enzymic. -!- Involved in the de novo synthesis of tetrahydrobiopterin from GTP, with the other enzymes involved being EC 1.1.1.153 and EC 4.2.3.12.

UniProtKB Entries (1)

P22288
GCH1_RAT
Rattus norvegicus
GTP cyclohydrolase 1

PDB Structure

PDB 1IS7
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Crystal structure of the stimulatory complex of GTP cyclohydrolase I and its feedback regulatory protein GFRP.
Maita, N., Okada, K., Hatakeyama, K., Hakoshima, T.
Proc.Natl.Acad.Sci.USA