1FB1

CRYSTAL STRUCTURE OF HUMAN GTP CYCLOHYDROLASE I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Zinc plays a key role in human and bacterial GTP cyclohydrolase I.

Auerbach, G.Herrmann, A.Bracher, A.Bader, G.Gutlich, M.Fischer, M.Neukamm, M.Garrido-Franco, M.Richardson, J.Nar, H.Huber, R.Bacher, A.

(2000) Proc Natl Acad Sci U S A 97: 13567-13572

  • DOI: 10.1073/pnas.240463497
  • Primary Citation of Related Structures:  
    1FB1, 1FBX

  • PubMed Abstract: 
  • The crystal structure of recombinant human GTP cyclohydrolase I was solved by Patterson search methods by using the coordinates of the Escherichia coli enzyme as a model. The human as well as bacterial enzyme were shown to contain an essential zinc ion coordinated to a His side chain and two thiol groups in each active site of the homodecameric enzymes that had escaped detection during earlier studies of the E ...

    The crystal structure of recombinant human GTP cyclohydrolase I was solved by Patterson search methods by using the coordinates of the Escherichia coli enzyme as a model. The human as well as bacterial enzyme were shown to contain an essential zinc ion coordinated to a His side chain and two thiol groups in each active site of the homodecameric enzymes that had escaped detection during earlier studies of the E. coli enzyme. The zinc ion is proposed to generate a hydroxyl nucleophile for attack of imidazole ring carbon atom eight of the substrate, GTP. It may also be involved in the hydrolytic release of formate from the intermediate, 2-amino-5-formylamino-6-ribosylamino-4(3H)-pyrimidinone 5'-triphosphate, and in the consecutive Amadori rearrangement of the ribosyl moiety.


    Organizational Affiliation

    Abteilung Strukturforschung, Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, D-82152 Martinsried, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTP CYCLOHYDROLASE IA, B, C, D, E196Homo sapiensMutation(s): 0 
Gene Names: GCH1DYT5GCH
EC: 3.5.4.16
Find proteins for P30793 (Homo sapiens)
Explore P30793 
Go to UniProtKB:  P30793
NIH Common Fund Data Resources
PHAROS:  P30793
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.11α = 90
b = 115.11β = 90
c = 387.31γ = 120
Software Package:
Software NamePurpose
MOLREPphasing
CNSrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-12-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance