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: 1.90 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 

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This is version 1.4 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: https://doi.org/10.1021/bi026778+
  • Primary Citation of Related Structures:  
    1ML6

  • 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-7,8,9,10-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.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutathione S-Transferase GT41A
A, B
221Mus musculusMutation(s): 1 
Gene Names: GST
EC: 2.5.1.18
UniProt
Find proteins for P10648 (Mus musculus)
Explore P10648 
Go to UniProtKB:  P10648
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10648
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GBX
Query on GBX

Download Ideal Coordinates CCD File 
C [auth A],
E [auth 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
C30 H27 N3 O9 S
DUWOHLGCRJLRRU-HVYZTVOGSA-N
IPA
Query on IPA

Download Ideal Coordinates CCD File 
D [auth A],
F [auth B]
ISOPROPYL ALCOHOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CSO
Query on CSO
A, B
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.067α = 90
b = 93.903β = 92.28
c = 52.6γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-04-15
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary
  • Version 1.4: 2023-11-15
    Changes: Data collection