GTP cyclohydrolase III from M. jannaschii (MJ0145) complexed with GTP and metal ions

A New Use for a Familiar Fold: The X-ray Crystal Structure of GTP-Bound GTP Cyclohydrolase III from Methanocaldococcus jannaschii Reveals a Two Metal Ion Catalytic Mechanism

MIQITVIQIDNYGPWTVTPNPRRESDLQALQSRLYADLNLMFGAHKGLVFYTRFDNLIAITNGIDLITHKRIQESIRNRY
PFTVSMVIASAETPYEAQKLATETLQEYGSAQDENRKEVLDVANELVVDGYVQIAHIDINNITGTLTDIVSAYDTYLNVN
KVKLALMEELLKYNALLFFIGGDNFMAPSNGMSEEDFLDIFNRINKKYKIELKAGIGIGRTAEDASNLADIGLEKIRGKL
VDKNVCTLKQDDFLESKMGMGKIYHPQF

17% PEG 4000, 0.2 M sodium acetate, 0.1 M Tris buffer, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 292K

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS