1JG5

CRYSTAL STRUCTURE OF RAT GTP CYCLOHYDROLASE I FEEDBACK REGULATORY PROTEIN, GFRP

• PDB DOI: https://doi.org/10.2210/pdb1JG5/pdb

• Classification: PROTEIN BINDING
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2001-06-23 Released: 2001-10-10 
• Deposition Author(s): Bader, G., Schiffmann, S., Herrmann, A., Fischer, M., Gutlich, M., Auerbach, G., Ploom, T., Bacher, A., Huber, R., Lemm, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.214 
• R-Value Work: 0.166 

Literature

Crystal structure of rat GTP cyclohydrolase I feedback regulatory protein, GFRP.

Bader, G., Schiffmann, S., Herrmann, A., Fischer, M., Gutlich, M., Auerbach, G., Ploom, T., Bacher, A., Huber, R., Lemm, T.

(2001) J Mol Biol 312: 1051-1057

• PubMed: 11580249 
• DOI: https://doi.org/10.1006/jmbi.2001.5011
• Primary Citation of Related Structures:  
  1JG5


• PubMed Abstract: 
  

  Tetrahydrobiopterin, the cofactor required for hydroxylation of aromatic amino acids regulates its own synthesis in mammals through feedback inhibition of GTP cyclohydrolase I. This mechanism is mediated by a regulatory subunit called GTP cyclohydrolase I feedback regulatory protein (GFRP). The 2.6 A resolution crystal structure of rat GFRP shows that the protein forms a pentamer. This indicates a model for the interaction of mammalian GTP cyclohydrolase I with its regulator, GFRP. Kinetic investigations of human GTP cyclohydrolase I in complex with rat and human GFRP showed similar regulatory effects of both GFRP proteins.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Homo 5-mer - A5 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.96 kDa 
• Atom Count: 3,601 
• Modelled Residue Count: 415 
• Deposited Residue Count: 415 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GTP CYCLOHYDROLASE I FEEDBACK REGULATORY PROTEIN	A, B, C, D, E	83	Rattus norvegicus	Mutation(s): 0
UniProt
Find proteins for P70552 (Rattus norvegicus) Explore P70552  Go to UniProtKB:  P70552

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
K	F [auth A], G [auth B], H [auth C], I [auth D], J [auth E]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.214 
• R-Value Work: 0.166 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 106.803	α = 90
b = 110.052	β = 90
c = 38.686	γ = 90

Software Package:

Software Name	Purpose
PROTEIN	model building
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
PROTEIN	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-10-10 
Deposition Author(s): Bader, G., Schiffmann, S., Herrmann, A., Fischer, M., Gutlich, M., Auerbach, G., Ploom, T., Bacher, A., Huber, R., Lemm, T.

Revision History  

• Version 1.0: 2001-10-10
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-03-13
  Changes: Data collection, Database references, Derived calculations