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1JG5 image
Deposition Date 2001-06-23
Release Date 2001-10-10
Last Version Date 2024-03-13
Entry Detail
PDB ID:
1JG5
Keywords:
PROTEIN BINDING
Title:
CRYSTAL STRUCTURE OF RAT GTP CYCLOHYDROLASE I FEEDBACK REGULATORY PROTEIN, GFRP
Biological Source:
Source Organism(s):
Rattus norvegicus (Taxon ID: 10116)
Expression System(s):
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.60 Å
R-Value Free:
0.21
R-Value Work:
0.16
Space Group:
P 21 21 2
1JG5 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:GTP CYCLOHYDROLASE I FEEDBACK REGULATORY PROTEIN
Gene (Uniprot):Gchfr
Chain IDs:A, B, C, D, E
Chain Length:83
Number of Molecules:5
Biological Source:Rattus norvegicus
UniProt ID:P70552 Pfam ID:PF06399
Ligand Molecules
K
Primary Citation
Crystal structure of rat GTP cyclohydrolase I feedback regulatory protein, GFRP.
J.Mol.Biol. 312 1051 1057 (2001)
PMID: 11580249 DOI: 10.1006/jmbi.2001.5011

Abstact

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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Primary Citation of related structures
1JG5
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