5L3J

ESCHERICHIA COLI DNA GYRASE B IN COMPLEX WITH BENZOTHIAZOLE-BASED INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.260 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Discovery of Benzothiazole Scaffold-Based DNA Gyrase B Inhibitors.

Gjorgjieva, M.Tomasic, T.Barancokova, M.Katsamakas, S.Ilas, J.Tammela, P.Peterlin Masic, L.Kikelj, D.

(2016) J Med Chem 59: 8941-8954

  • DOI: https://doi.org/10.1021/acs.jmedchem.6b00864
  • Primary Citation of Related Structures:  
    5L3J

  • PubMed Abstract: 

    Bacterial DNA gyrase and topoisomerase IV control the topological state of DNA during replication and are validated targets for antibacterial drug discovery. Starting from our recently reported 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole-based DNA gyrase B inhibitors, we replaced their central core with benzothiazole-2,6-diamine scaffold and interchanged substituents in positions 2 and 6. This resulted in equipotent nanomolar inhibitors of DNA gyrase from Escherichia coli displaying improved inhibition of Staphylococcus aureus DNA gyrase and topoisomerase IV from both bacteria. Compound 27 was the most balanced inhibitor of DNA gyrase and topoisomerase IV from both E. coli and S. aureus. The crystal structure of the 2-((2-(4,5-dibromo-1H-pyrrole-2-carboxamido)benzothiazol-6-yl)amino)-2-oxoacetic acid (24) in complex with E. coli DNA gyrase B revealed the binding mode of the inhibitor in the ATP-binding pocket. Only some compounds possessed weak antibacterial activity against Gram-positive bacteria. These results provide a basis for structure-based optimization toward dual DNA gyrase and topoisomerase IV inhibitors with antibacterial activity.


  • Organizational Affiliation

    Faculty of Pharmacy, University of Ljubljana , Aškerčeva 7, 1000 Ljubljana, Slovenia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA gyrase subunit B378Escherichia coliMutation(s): 0 
Gene Names: gyrBZ5190ECs4634
EC: 5.99.1.3
UniProt
Find proteins for P0AES6 (Escherichia coli (strain K12))
Explore P0AES6 
Go to UniProtKB:  P0AES6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AES6
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
6G9
Query on 6G9

Download Ideal Coordinates CCD File 
B [auth A]2-[[2-[[4,5-bis(bromanyl)-1~{H}-pyrrol-2-yl]carbonylamino]-1,3-benzothiazol-6-yl]amino]-2-oxidanylidene-ethanoic acid
C14 H8 Br2 N4 O4 S
ZDVZBRWEKLWNNU-UHFFFAOYSA-N
IOD
Query on IOD

Download Ideal Coordinates CCD File 
C [auth A]IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
Binding Affinity Annotations 
IDSourceBinding Affinity
6G9 BindingDB:  5L3J Kd: 230 (nM) from 1 assay(s)
IC50: 58 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.260 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.286α = 90
b = 49.585β = 93.48
c = 70.212γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-31
    Type: Initial release
  • Version 1.1: 2016-10-26
    Changes: Database references