6PNO

Human GSTO1-1 complexed with 2-chloro-N-(4-chloro-3-(N-isopropylsulfamoyl)phenyl)acetamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report

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This is version 1.5 of the entry. See complete history


Literature

Development of Benzenesulfonamide Derivatives as Potent Glutathione Transferase Omega-1 Inhibitors.

Xie, Y.Tummala, P.Oakley, A.J.Deora, G.S.Nakano, Y.Rooke, M.Cuellar, M.E.Strasser, J.M.Dahlin, J.L.Walters, M.A.Casarotto, M.G.Board, P.G.Baell, J.B.

(2020) J Med Chem 63: 2894-2914

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b01391
  • Primary Citation of Related Structures:  
    6PNM, 6PNN, 6PNO

  • PubMed Abstract: 

    Glutathione transferase omega-1 (GSTO1-1) is an enzyme whose function supports the activation of interleukin (IL)-1β and IL-18 that are implicated in a variety of inflammatory disease states for which small-molecule inhibitors are sought. The potent reactivity of the active-site cysteine has resulted in reported inhibitors that act by covalent labeling. In this study, structure-activity relationship (SAR) elaboration of the reported GSTO1-1 inhibitor C1-27 was undertaken. Compounds were evaluated for inhibitory activity toward purified recombinant GSTO1-1 and for indicators of target engagement in cell-based assays. As covalent inhibitors, the k inact / K I values of selected compounds were determined, as well as in vivo pharmacokinetics analysis. Cocrystal structures of key novel compounds in complex with GSTO1-1 were also solved. This study represents the first application of a biochemical assay for GSTO1-1 to determine k inact / K I values for tested inhibitors and the most extensive set of cell-based data for a GSTO1-1 inhibitor SAR series reported to date. Our research culminated in the discovery of 25 , which we propose as the preferred biochemical tool to interrogate cellular responses to GSTO1-1 inhibition.


  • Organizational Affiliation

    Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutathione S-transferase omega-1240Homo sapiensMutation(s): 0 
Gene Names: GSTO1GSTTLP28
EC: 2.5.1.18 (PDB Primary Data), 1.8.5.1 (PDB Primary Data), 1.20.4.2 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P78417 (Homo sapiens)
Explore P78417 
Go to UniProtKB:  P78417
PHAROS:  P78417
GTEx:  ENSG00000148834 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP78417
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
ORM BindingDB:  6PNO Ki: 4800 (nM) from 1 assay(s)
IC50: 70 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.26α = 90
b = 57.26β = 90
c = 139.991γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2019-07-24 
  • Deposition Author(s): Oakley, A.J.

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1124673
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1156455

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-24
    Type: Initial release
  • Version 1.1: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.2: 2020-03-11
    Changes: Database references
  • Version 1.3: 2020-04-08
    Changes: Database references
  • Version 1.4: 2023-10-11
    Changes: Data collection, Database references, Refinement description
  • Version 1.5: 2024-11-20
    Changes: Structure summary