MurE ligase of Mycobacterium Tuberculosis

Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

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This is version 1.2 of the entry. See complete history


ATP-Dependent Mure Ligase in Mycobacterium Tuberculosis: Biochemical and Structural Characterisation.

Basavannacharya, C.Robertson, G.Munshi, T.Keep, N.H.Bhakta, S.

(2010) Tuberculosis (Edinb) 90: 16

  • DOI: https://doi.org/10.1016/j.tube.2009.10.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    New therapies are required against Mycobacterium tuberculosis and its cell wall peptidoglycan biosynthesis is a potential therapeutic target. UDP-MurNAc-tripeptide ligase (MurE) is a member of the ATP-dependent ligase family, which incorporate amino acids including meso-diaminopimelic acid (m-DAP) into peptidoglycan during synthesis in a species-specific manner. In the present study, we have cloned, over-expressed, and characterised MurE from M. tuberculosis (Mtb-MurE). The crystal structure has been determined at 3.0A resolution in the presence of the substrate UDP-MurNAc-l-Ala-d-Glu (UAG). The activity of the enzyme was measured through estimating inorganic phosphate released in a non-radioactive high-throughput colourimetric assay. UDP-MurNAc-l-Ala-d-Glu-m-DAP (UMT) formation coupled to inorganic phosphate release was confirmed by HPLC and mass spectrometric analyses. Kinetic constants were determined for a range of natural substrates using optimised conditions. From our findings, it is evident that Mtb-MurE is highly specific in adding m-DAP to UDP-MurNAc-dipeptide and ATP-hydrolysis is an absolute requirement for its activity.

  • Organizational Affiliation

    Institute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, University of London, Malet Street, London WC1E 7HX, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
535Mycobacterium tuberculosis H37RvMutation(s): 0 
Find proteins for P9WJL3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WJL3 
Go to UniProtKB:  P9WJL3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WJL3
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.92α = 111.09
b = 79.8β = 92.16
c = 82.92γ = 93.98
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description