2WTZ

MurE ligase of Mycobacterium Tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

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: 10.1016/j.tube.2009.10.007
  • Primary Citation of Related Structures:  
    2WTZ

  • 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 ...

    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.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
UDP-N-ACETYLMURAMOYL-L-ALANYL-D-GLUTAMATE--2,6-DIAMINOPIMELATE LIGASE ABCD535Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: murERv2158cMTCY270.10
EC: 6.3.2.13
Find proteins for P9WJL3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WJL3 
Go to UniProtKB:  P9WJL3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
KCX
Query on KCX
A,B,C,DL-PEPTIDE LINKINGC7 H14 N2 O4LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MrBUMPphasing

Structure Validation

View Full Validation Report



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