5FWG

TETRA-(5-FLUOROTRYPTOPHANYL)-GLUTATHIONE TRANSFERASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Enzymes harboring unnatural amino acids: mechanistic and structural analysis of the enhanced catalytic activity of a glutathione transferase containing 5-fluorotryptophan.

Parsons, J.F.Xiao, G.Gilliland, G.L.Armstrong, R.N.

(1998) Biochemistry 37: 6286-6294

  • DOI: 10.1021/bi980219e

  • PubMed Abstract: 
  • The catalytic characteristics and structure of the M1-1 isoenzyme of rat glutathione (GSH) transferase in which all four tryptophan residues in each monomer are replaced with 5-fluorotryptophan are described. The fluorine-for-hydrogen substitution do ...

    The catalytic characteristics and structure of the M1-1 isoenzyme of rat glutathione (GSH) transferase in which all four tryptophan residues in each monomer are replaced with 5-fluorotryptophan are described. The fluorine-for-hydrogen substitution does not change the interaction of the enzyme with GSH even though two tryptophan residues (Trp7 and Trp45) are involved in direct hydrogen-bonding interactions with the substrate. The rate constants for association and dissociation of the peptide, measured by stopped-flow spectrometry, remain unchanged by the unnatural amino acid. The 5-FTrp-substituted enzyme exhibits a kcat of 73 s-1 as compared to 18 s-1 for the native enzyme toward 1-chloro-2,4-dinitrobenzene. That the increase in the turnover number is due to an enhanced rate of product release in the mutant is confirmed by the kinetics of the approach to equilibrium for binding of the product. The crystal structure of the 5-FTrp-containing enzyme was solved at a resolution of 2.0 A by difference Fourier techniques. The structure reveals local conformational changes in the structural elements that define the approach to the active site which are attributed to steric interactions of the fluorine atoms associated with 5-FTrp146 and 5-FTrp214 in domain II. These changes appear to result in the enhanced rate of product release. This structure represents the first of a protein substituted with 5-fluorotryptophan.


    Related Citations: 
    • Contribution of Tyrosine 6 to the Catalytic Mechanism of Isoenzyme 3-3 of Glutathione S-Transferase
      Liu, S.,Zhang, P.,Ji, X.,Johnson, W.W.,Gilliland, G.L.,Armstrong, R.N.
      (1992) J.Biol.Chem. 267: 4296
    • Tyrosine 115 Participates Both in Chemical and Physical Steps of the Catalytic Mechanism of a Glutathione S-Transferase
      Johnson, W.W.,Liu, S.,Ji, X.,Gilliland, G.L.,Armstrong, R.N.
      (1993) J.Biol.Chem. 268: 11508
    • The Three-Dimensional Structure of a Glutathione S-Transferase from the Mu Gene Class. Structural Analysis of the Binary Complex of Isoenzyme 3-3 and Glutathione at 2.2-A Resolution
      Ji, X.,Zhang, P.,Armstrong, R.N.,Gilliland, G.L.
      (1992) Biochemistry 31: 10169


    Organizational Affiliation

    Departments of Biochemistry and Chemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TETRA-(5-FLUOROTRYPTOPHANYL)-GLUTATHIONE TRANSFERASE MU CLASS
A, B
217Rattus norvegicusMutation(s): 0 
Gene Names: Gstm1
EC: 2.5.1.18
Find proteins for P04905 (Rattus norvegicus)
Go to UniProtKB:  P04905
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GPR
Query on GPR

Download SDF File 
Download CCD File 
A, B
(9R,10R)-9-(S-GLUTATHIONYL)-10-HYDROXY-9,10-DIHYDROPHENANTHRENE
C24 H27 N3 O7 S
JNNIZILNBMPOAC-MOXQZVSFSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
FTR
Query on FTR
A, B
L-PEPTIDE LINKINGC11 H11 F N2 O2TRP
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CYPKd: 190 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 86.939α = 90.00
b = 68.747β = 105.08
c = 80.539γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
TNTrefinement
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-01-27
    Type: Initial release
  • Version 1.1: 2008-03-04
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other