1E8C

Structure of MurE the UDP-N-acetylmuramyl tripeptide synthetase from E. coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of Udp-N-Acetylmuramoyl-L-Alanyl-D-Glutamate: Meso-Diaminopimelate Ligase from Escherichia Coli

Gordon, E.J.Flouret, B.Chantalat, L.Van Heijenoort, J.Mengin-Lecreulx, D.Dideberg, O.

(2001) J.Biol.Chem. 276: 10999

  • DOI: 10.1074/jbc.M009835200

  • PubMed Abstract: 
  • UDP-N-acetylmuramoyl-l-alanyl-d-glutamate:meso-diaminopimelate ligase is a cytoplasmic enzyme that catalyzes the addition of meso-diaminopimelic acid to nucleotide precursor UDP-N-acetylmuramoyl-l-alanyl-d-glutamate in the biosynthesis of bacterial c ...

    UDP-N-acetylmuramoyl-l-alanyl-d-glutamate:meso-diaminopimelate ligase is a cytoplasmic enzyme that catalyzes the addition of meso-diaminopimelic acid to nucleotide precursor UDP-N-acetylmuramoyl-l-alanyl-d-glutamate in the biosynthesis of bacterial cell-wall peptidoglycan. The crystal structure of the Escherichia coli enzyme in the presence of the final product of the enzymatic reaction, UDP-MurNAc-l-Ala-gamma-d-Glu-meso-A(2)pm, has been solved to 2.0 A resolution. Phase information was obtained by multiwavelength anomalous dispersion using the K shell edge of selenium. The protein consists of three domains, two of which have a topology reminiscent of the equivalent domain found in the already established three-dimensional structure of the UDP-N-acetylmuramoyl-l-alanine: D-glutamate-ligase (MurD) ligase, which catalyzes the immediate previous step of incorporation of d-glutamic acid in the biosynthesis of the peptidoglycan precursor. The refined model reveals the binding site for UDP-MurNAc-l-Ala-gamma-d-Glu-meso-A(2)pm, and comparison with the six known MurD structures allowed the identification of residues involved in the enzymatic mechanism. Interestingly, during refinement, an excess of electron density was observed, leading to the conclusion that, as in MurD, a carbamylated lysine residue is present in the active site. In addition, the structural determinant responsible for the selection of the amino acid to be added to the nucleotide precursor was identified.


    Organizational Affiliation

    Institut de Biologie Structurale Jean-Pierre Ebel, CEA-CNRS, Laboratoire de Cristallographie Macromoléculaire, 41 rue Jules Horowitz, F-38027 Grenoble Cedex 1, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UDP-N-ACETYLMURAMOYLALANYL-D-GLUTAMATE--2,6-DIAMINOPIMELATE LIGASE
A, B
498Escherichia coli (strain K12)Gene Names: murE
EC: 6.3.2.13
Find proteins for P22188 (Escherichia coli (strain K12))
Go to UniProtKB:  P22188
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
API
Query on API

Download SDF File 
Download CCD File 
A, B
2,6-DIAMINOPIMELIC ACID
C7 H14 N2 O4
GMKMEZVLHJARHF-SYDPRGILSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
UAG
Query on UAG

Download SDF File 
Download CCD File 
A, B
URIDINE-5'-DIPHOSPHATE-N-ACETYLMURAMOYL-L-ALANINE-D-GLUTAMATE
C28 H43 N5 O23 P2
OJZCATPXPWFLHF-HPUCEMLMSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
KCX
Query on KCX
A, B
L-PEPTIDE LINKINGC7 H14 N2 O4LYS
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.202 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 93.465α = 90.00
b = 99.690β = 90.00
c = 236.146γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
DENZOdata reduction
SOLVEphasing
CNSrefinement
SCALAdata scaling
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance