Staphylococcus aureus FtsZ 12-316 G196S

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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This is version 1.3 of the entry. See complete history


Structural Flexibility of an Inhibitor Overcomes Drug Resistance Mutations in Staphylococcus aureus FtsZ

Fujita, J.Maeda, Y.Mizohata, E.Inoue, T.Kaul, M.Parhi, A.K.LaVoie, E.J.Pilch, D.S.Matsumura, H.

(2017) ACS Chem Biol 12: 1947-1955

  • DOI: https://doi.org/10.1021/acschembio.7b00323
  • Primary Citation of Related Structures:  
    5XDT, 5XDU, 5XDV, 5XDW

  • PubMed Abstract: 

    In the effort to combat antibiotic resistance, inhibitors of the essential bacterial protein FtsZ have emerged as a promising new class of compounds with clinical potential. One such FtsZ inhibitor (TXA707) is associated with potent activity against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA) that are resistant to current standard-of-care antibiotics. However, mutations in S. aureus FtsZ (SaFtsZ) that confer resistance to TXA707 have been observed, with mutations in the Gly196 and Gly193 residues being among the most prevalent. Here, we describe structural studies of an FtsZ inhibitor, TXA6101, which retains activity against MRSA isolates that express either G196S or G193D mutant FtsZ. We present the crystal structures of TXA6101 in complex with both wild-type SaFtsZ and G196S mutant SaFtsZ, as well the crystal structure of TXA707 in complex with wild-type SaFtsZ. Comparison of the three structures reveals a molecular basis for the differential targeting abilities of TXA6101 and TXA707. The greater structural flexibility of TXA6101 relative to TXA707 enables TXA6101 to avoid steric clashes with Ser196 and Asp193. Our structures also demonstrate that the binding of TXA6101 induces previously unobserved conformational rearrangements of SaFtsZ residues in the binding pocket. In aggregate, the structures reported in this work reveal key factors for overcoming drug resistance mutations in SaFtsZ and offer a structural basis for the design of FtsZ inhibitors with enhanced antibacterial potency and reduced susceptibility to mutational resistance.

  • Organizational Affiliation

    Department of Biotechnology, College of Life Sciences, Ritsumeikan University , 1-1-1 Noji-higashi, Shiga 525-8577, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cell division protein FtsZ308Staphylococcus aureus subsp. aureus MRSA252Mutation(s): 1 
Gene Names: ftsZSAR1162
Find proteins for Q6GHP9 (Staphylococcus aureus (strain MRSA252))
Explore Q6GHP9 
Go to UniProtKB:  Q6GHP9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6GHP9
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GDP

Download Ideal Coordinates CCD File 
C10 H15 N5 O11 P2
Query on CA

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.764α = 90
b = 51.011β = 110.71
c = 88.328γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKLdata reduction

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 Allergy and Infectious Diseases (NIH/NIAID)United StatesAI118874
Japan Society for the Promotion of ScienceJapan15J00589
Japan Society for the Promotion of ScienceJapan24109017
Japan Society for the Promotion of ScienceJapan15H04443
Japan Society for the Promotion of ScienceJapan26102526
Japan Society for the Promotion of ScienceJapan16H00783

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Author supporting evidence
  • Version 1.2: 2022-03-23
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2023-11-22
    Changes: Data collection, Refinement description