Bulgecin A: The key to a broad-spectrum inhibitor that targets lytic transglycosylases

Experimental Data Snapshot

  • Resolution: 1.78 Å

wwPDB Validation   3D Report Full Report

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Bulgecin A: The Key to a Broad-Spectrum Inhibitor That Targets Lytic Transglycosylases.

Williams, A.H.Wheeler, R.Thiriau, C.Haouz, A.Taha, M.K.Boneca, I.G.

(2017) Antibiotics (Basel) 6

  • DOI: https://doi.org/10.3390/antibiotics6010008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Lytic transglycosylases (Lts) are involved in recycling, cell division, and metabolism of the peptidoglycan. They have been understudied for their usefulness as potential antibacterial targets due to their high redundancy in Gram-negative bacteria. Bulgecin A is an O-sulphonated glycopeptide that targets primarily soluble lytic tranglycosylases (Slt). It has been shown that bulgecin A increases the efficacy of β-lactams that target penicillin bindings proteins (PBPs). Here, we present the high-resolution crystal structure of LtgA from Neisseria meningitidis strain MC58, a membrane bound homolog of Escherichia coli Slt, in complex with bulgecin A. The LtgA-bulgecin A complex reveals the mechanism of inhibition by bulgecin A at near atomic resolution. We further demonstrate that bulgecin A is not only a potent inhibitor of LtgA, but most importantly, it restores the efficacy of β-lactam antibiotics in strains of N. meningitidis and Neisseria gonorrhoeae that have reduced susceptibility to β-lactams. This is particularly relevant for N. gonorrhoeae where no vaccines are available. This work illustrates how best to target dangerous pathogens using a multiple drug target approach, a new and alternative approach to fighting antibiotic resistance.

  • Organizational Affiliation

    Institut Pasteur, Unité Biologie et génétique de la paroi bactérienne, Dept. Microbiologie, 28 Rue du Dr. Roux, 75015 Paris, France. awilliam@pasteur.fr.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transglycosylase576Neisseria meningitidisMutation(s): 0 
Gene Names: sltERS514729_01258
EC: 4.2.2
Find proteins for Q9JXP1 (Neisseria meningitidis serogroup B (strain MC58))
Explore Q9JXP1 
Go to UniProtKB:  Q9JXP1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9JXP1
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 1.78 Å
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.834α = 90
b = 71.561β = 90
c = 121.123γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research CouncilFrance202283

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-29
    Type: Initial release
  • Version 1.1: 2017-05-10
    Changes: Database references
  • Version 1.2: 2017-05-17
    Changes: Database references
  • Version 1.3: 2024-01-17
    Changes: Author supporting evidence, Data collection, Database references, Refinement description