1IS8

Crystal structure of rat GTPCHI/GFRP stimulatory complex plus Zn


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the stimulatory complex of GTP cyclohydrolase I and its feedback regulatory protein GFRP.

Maita, N.Okada, K.Hatakeyama, K.Hakoshima, T.

(2002) Proc.Natl.Acad.Sci.USA 99: 1212-1217

  • DOI: 10.1073/pnas.022646999
  • Primary Citation of Related Structures:  1IS7

  • PubMed Abstract: 
  • In the presence of phenylalanine, GTP cyclohydrolase I feedback regulatory protein (GFRP) forms a stimulatory 360-kDa complex with GTP cyclohydrolase I (GTPCHI), which is the rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin. The crysta ...

    In the presence of phenylalanine, GTP cyclohydrolase I feedback regulatory protein (GFRP) forms a stimulatory 360-kDa complex with GTP cyclohydrolase I (GTPCHI), which is the rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin. The crystal structure of the stimulatory complex reveals that the GTPCHI decamer is sandwiched by two GFRP homopentamers. Each GFRP pentamer forms a symmetrical five-membered ring similar to beta-propeller. Five phenylalanine molecules are buried inside each interface between GFRP and GTPCHI, thus enhancing the binding of these proteins. The complex structure suggests that phenylalanine-induced GTPCHI x GFRP complex formation enhances GTPCHI activity by locking the enzyme in the active state.


    Organizational Affiliation

    Department of Molecular Biology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GTP Cyclohydrolase I
A, B, C, D, E, F, G, H, I, J
230Rattus norvegicusGene Names: Gch1 (Gch)
EC: 3.5.4.16
Find proteins for P22288 (Rattus norvegicus)
Go to UniProtKB:  P22288
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GTP Cyclohydrolase I Feedback Regulatory Protein
K, L, M, N, O, P, Q, R, S, T
84Rattus norvegicusGene Names: Gchfr (Gfrp)
Find proteins for P70552 (Rattus norvegicus)
Go to UniProtKB:  P70552
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
K, L, M, N, O, P, Q, R, S, T
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
PHE
Query on PHE

Download SDF File 
Download CCD File 
K, M, N, O, P, Q, R, S, T
PHENYLALANINE
C9 H11 N O2
COLNVLDHVKWLRT-QMMMGPOBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 123.900α = 90.00
b = 111.430β = 97.32
c = 125.910γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CCP4data scaling
MOSFLMdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance