Crystal Structure of E.coli MnmG (GidA), a Highly-Conserved tRNA Modifying Enzyme

Experimental Data Snapshot

  • Resolution: 2.41 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

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Structure-function analysis of Escherichia coli MnmG (GidA), a highly conserved tRNA-modifying enzyme.

Shi, R.Villarroya, M.Ruiz-Partida, R.Li, Y.Proteau, A.Prado, S.Moukadiri, I.Benitez-Paez, A.Lomas, R.Wagner, J.Matte, A.Velazquez-Campoy, A.Armengod, M.E.Cygler, M.

(2009) J Bacteriol 191: 7614-7619

  • DOI: https://doi.org/10.1128/JB.00650-09
  • Primary Citation of Related Structures:  
    3CES, 3G05

  • PubMed Abstract: 

    The MnmE-MnmG complex is involved in tRNA modification. We have determined the crystal structure of Escherichia coli MnmG at 2.4-A resolution, mutated highly conserved residues with putative roles in flavin adenine dinucleotide (FAD) or tRNA binding and MnmE interaction, and analyzed the effects of these mutations in vivo and in vitro. Limited trypsinolysis of MnmG suggests significant conformational changes upon FAD binding.

  • Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, Quebec, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
tRNA uridine 5-carboxymethylaminomethyl modification enzyme gidA
A, B, C, D
651Escherichia coliMutation(s): 0 
Gene Names: gidA
Find proteins for P0A6U3 (Escherichia coli (strain K12))
Explore P0A6U3 
Go to UniProtKB:  P0A6U3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6U3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.41 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.904α = 90
b = 144.326β = 106.63
c = 147.745γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description