4WF6

Anthrax toxin lethal factor with bound small molecule inhibitor MK-31


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Probing the S2' Subsite of the Anthrax Toxin Lethal Factor Using Novel N-Alkylated Hydroxamates.

Kurbanov, E.K.Chiu, T.L.Solberg, J.Francis, S.Maize, K.M.Fernandez, J.Johnson, R.L.Hawkinson, J.E.Walters, M.A.Finzel, B.C.Amin, E.A.

(2015) J Med Chem 58: 8723-8733

  • DOI: https://doi.org/10.1021/acs.jmedchem.5b01446
  • Primary Citation of Related Structures:  
    4WF6, 5D1S, 5D1T, 5D1U

  • PubMed Abstract: 

    The lethal factor (LF) enzyme secreted by Bacillus anthracis is a zinc hydrolase that is chiefly responsible for anthrax-related cell death. Although many studies of the design of small molecule LF inhibitors have been conducted, no LF inhibitor is yet available as a therapeutic agent. Inhibitors with considerable chemical diversity have been developed and investigated; however, the LF S2' subsite has not yet been systematically explored as a potential target for lead optimization. Here we present synthesis, experimental evaluation, modeling, and structural biology for a novel series of sulfonamide hydroxamate LF inhibitor analogues specifically designed to extend into, and probe chemical preferences of, this S2' subsite. We discovered that this region accommodates a wide variety of chemical functionalities and that a broad selection of ligand structural modifications directed to this area can be incorporated without significant deleterious alterations in biological activity. We also identified key residues in this subsite that can potentially be targeted to improve inhibitor binding.


  • Organizational Affiliation

    Department of Medicinal Chemistry, University of Minnesota , Minneapolis, Minnesota 55414, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lethal factor519Bacillus anthracisMutation(s): 1 
Gene Names: lefpXO1-107BXA0172GBAA_pXO1_0172
EC: 3.4.24.83
UniProt
Find proteins for P15917 (Bacillus anthracis)
Explore P15917 
Go to UniProtKB:  P15917
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15917
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
407 BindingDB:  4WF6 IC50: min: 130, max: 1600 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.4α = 90
b = 75.2β = 90
c = 138.8γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data scaling
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States5T32-GM008700
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI091790-01
Minnesota Dept. of Employment and Economic DevelopmentUnited StatesSPAP-06-0014-P-FY07

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-09
    Type: Initial release
  • Version 1.1: 2015-11-11
    Changes: Database references
  • Version 1.2: 2015-11-25
    Changes: Database references
  • Version 1.3: 2017-09-27
    Changes: Author supporting evidence, Database references, Derived calculations, Refinement description
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Refinement description