4PKR

Anthrax toxin lethal factor with bound small molecule inhibitor 10

  • Classification: HYDROLASE/HYDROLASE INHIBITOR
  • Organism(s): Bacillus anthracis
  • Expression System: Escherichia coli
  • Mutation(s): Yes 

  • Deposited: 2014-05-15 Released: 2014-11-12 
  • Deposition Author(s): Maize, K.M., De la Mora, T., Finzel, B.C.
  • Funding Organization(s): Minnesota Dept. of Employment and Economic Development, National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 

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This is version 1.5 of the entry. See complete history. 


Literature

Anthrax toxin lethal factor domain 3 is highly mobile and responsive to ligand binding.

Maize, K.M., Kurbanov, E.K., De La Mora-Rey, T., Geders, T.W., Hwang, D.J., Walters, M.A., Johnson, R.L., Amin, E.A., Finzel, B.C.

(2014) Acta Crystallogr D Biol Crystallogr 70: 2813-2822

  • DOI: 10.1107/S1399004714018161
  • Primary Citation of Related Structures:  
    4PKQ, 4PKR, 4PKS, 4PKT, 4PKU, 4PKV, 4PKW

  • PubMed Abstract: 

    • The secreted anthrax toxin consists of three components: the protective antigen (PA), edema factor (EF) and lethal factor (LF). LF, a zinc metalloproteinase, compromises the host immune system primarily by targeting mitogen-activated protein kinase kinases in macrophages ...

    The secreted anthrax toxin consists of three components: the protective antigen (PA), edema factor (EF) and lethal factor (LF). LF, a zinc metalloproteinase, compromises the host immune system primarily by targeting mitogen-activated protein kinase kinases in macrophages. Peptide substrates and small-molecule inhibitors bind LF in the space between domains 3 and 4 of the hydrolase. Domain 3 is attached on a hinge to domain 2 via residues Ile300 and Pro385, and can move through an angular arc of greater than 35° in response to the binding of different ligands. Here, multiple LF structures including five new complexes with co-crystallized inhibitors are compared and three frequently populated LF conformational states termed `bioactive', `open' and `tight' are identified. The bioactive position is observed with large substrate peptides and leaves all peptide-recognition subsites open and accessible. The tight state is seen in unliganded and small-molecule complex structures. In this state, domain 3 is clamped over certain substrate subsites, blocking access. The open position appears to be an intermediate state between these extremes and is observed owing to steric constraints imposed by specific bound ligands. The tight conformation may be the lowest-energy conformation among the reported structures, as it is the position observed with no bound ligand, while the open and bioactive conformations are likely to be ligand-induced.

    Organizational Affiliation: 

    Department of Medicinal Chemistry and Minnesota Supercomputing Institute, University of Minnesota, 8-101 Weaver-Densford Hall, 308 Harvard Street SE, Minneapolis, MN 55455, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Lethal factorA519Bacillus anthracisMutation(s): 1 
Gene Names: lef, pXO1-107, BXA0172, GBAA_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
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2ZL
Query on 2ZL
Download Ideal Coordinates CCD File 
B [auth A]N~2~-benzyl-N~2~-[(4-fluoro-3-methylphenyl)sulfonyl]-N-hydroxy-D-alaninamide
C17 H19 F N2 O4 S
ZVJSGLFNUKONDD-CYBMUJFWSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
E [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
D [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
2ZL Binding MOAD:  4PKR IC50: 1.52e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.2α = 90
b = 78β = 90
c = 134.7γ = 90
Software Package:
Software NamePurpose
d*TREKdata reduction
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Minnesota Dept. of Employment and Economic DevelopmentUnited StatesSPAP-06-0014-P-FY07
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI091790-01
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM08700

Revision History  (Full details and data files)

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2014-11-26
    Changes: Database references
  • Version 1.2: 2015-02-04
    Changes: Derived calculations
  • Version 1.3: 2015-02-25
    Changes: Derived calculations
  • Version 1.4: 2017-09-27
    Changes: Author supporting evidence, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.5: 2019-12-11
    Changes: Author supporting evidence