1ML6

Crystal Structure of mGSTA2-2 in Complex with the Glutathione Conjugate of Benzo[a]pyrene-7(R),8(S)-Diol-9(S),10(R)-Epoxide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Residues 207, 216, and 221 and the catalytic activity of mGSTA1-1 and mGSTA2-2 toward benzo[a]pyrene-(7R,8S)-diol-(9S,10R)-epoxide

Gu, Y.Xiao, B.Wargo, H.L.Bucher, M.H.Singh, S.V.Ji, X.

(2003) Biochemistry 42: 917-921

  • DOI: 10.1021/bi026778+

  • PubMed Abstract: 
  • Murine class alpha glutathione S-transferase subunit types A2 (mGSTA2-2) and A1 (mGSTA1-1) have high catalytic efficiency for glutathione (GSH) conjugation of the ultimate carcinogenic metabolite of benzo[a]pyrene, (+)-anti-7,8-dihydroxy-9,10-oxy-7,8 ...

    Murine class alpha glutathione S-transferase subunit types A2 (mGSTA2-2) and A1 (mGSTA1-1) have high catalytic efficiency for glutathione (GSH) conjugation of the ultimate carcinogenic metabolite of benzo[a]pyrene, (+)-anti-7,8-dihydroxy-9,10-oxy-7,8,9,10-tetrahydrobenzo[a]pyrene, [(+)-anti-BPDE]. Only 10 residues differ between the sequences of mGSTA1-1 and 2-2. However, the catalytic efficiency of mGSTA1-1 for GSH conjugation of (+)-anti-BPDE is >3-fold higher as compared with mGSTA2-2. The crystal structure of mGSTA1-1 in complex with the GSH conjugate of (+)-anti-7,8-dihydroxy-9,10-oxy-7,8,9,10-tetrahydrobenzo[a]pyrene (GSBpd) reveals that R216 and I221 in the last helix play important roles in catalysis [Gu, Y., Singh, S. V., and Ji, X. (2000) Biochemistry 39, 12552-12557]. The crystal structure of mGSTA2-2 in complex with GSBpd has been determined, which reveals a different binding mode of GSBpd. Comparison of the two structures suggests that residues 207 and 221 are responsible for the different binding mode of GSBpd and therefore contribute to the distinct catalytic efficiency of the two isozymes.


    Related Citations: 
    • Residue R216 and Catalytic Efficiency of a Murine Class Alpha Glutathione S-Transferase toward Benzo[a]pyrene 7(R),8(S)-Diol-9(S),10(R)-Epoxide
      Gu, Y.,Singh, S.V.,Ji, X.
      (2000) Biochemistry 39: 12552
    • Amino Acid Substitutions at Positions 207 and 221 Contribute to Catalytic Differences between Murine Glutathione S-Transferase A1-1 and A2-2 toward (+)-anti-7,8-Dihydroxy-9,10-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene
      Xia, H.,Gu, Y.,Pan, S.-S.,Ji, X.,Singh, S.V.
      (1999) Biochemistry 38: 9824


    Organizational Affiliation

    Macromolecular Crystallographic Laboratory, National Cancer Institute, Frederick, Maryland 21702, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutathione S-Transferase GT41A
A, B
221Mus musculusGene Names: Gsta2
EC: 2.5.1.18
Find proteins for P10648 (Mus musculus)
Go to UniProtKB:  P10648
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IPA
Query on IPA

Download SDF File 
Download CCD File 
A, B
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
GBX
Query on GBX

Download SDF File 
Download CCD File 
A, B
2-AMINO-4-[1-(CARBOXYMETHYL-CARBAMOYL)-2-(9-HYDROXY-7,8-DIOXO-7,8,9,10-TETRAHYDRO-BENZO[DEF]CHRYSEN-10-YLSULFANYL)-ETHYLCARBAMOYL]-BUTYRIC ACID
GLUTATHIONE CONJUGATE OF (+)-ANTI-BPDE
C30 H27 N3 O9 S
DUWOHLGCRJLRRU-HVYZTVOGSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A, B
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 99.067α = 90.00
b = 93.903β = 92.28
c = 52.600γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-15
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance