Crystal Structure of Weissella viridescens FemX at 1.7 Ang Resolution

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 

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Crystal structures of Weissella viridescens FemX and its complex with UDP-MurNAc-pentapeptide: insights into FemABX family substrates recognition.

Biarrotte-Sorin, S.Maillard, A.P.Delettre, J.Sougakoff, W.Arthur, M.Mayer, C.

(2004) Structure 12: 257-267

  • DOI: https://doi.org/10.1016/j.str.2004.01.006
  • Primary Citation of Related Structures:  
    1NE9, 1P4N

  • PubMed Abstract: 

    Members of the FemABX protein family are novel therapeutic targets, as they are involved in the synthesis of the bacterial cell wall. They catalyze the addition of amino acid(s) on the peptidoglycan precursor using aminoacylated tRNA as a substrate. We report here the high-resolution structure of Weissella viridescens L-alanine transferase FemX and its complex with the UDP-MurNAc-pentapeptide. This is the first structure example of a FemABX family member that does not possess a coiled-coil domain. FemX consists of two structurally equivalent domains, separated by a cleft containing the binding site of the UDP-MurNAc-pentapeptide and a long channel that traverses one of the two domains. Our structural studies bring new insights into the evolution of the FemABX and the related GNAT superfamilies, shed light on the recognition site of the aminoacylated tRNA in Fem proteins, and allowed manual docking of the acceptor end of the alanyl-tRNAAla.

  • Organizational Affiliation

    Laboratoire de Minéralogie-Cristallographie de Paris, Université Paris 6, 4 place Jussieu, Paris Cedex 05, 75252, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FemX335Weissella viridescensMutation(s): 0 
Gene Names: femx
Find proteins for Q9EY50 (Weissella viridescens)
Explore Q9EY50 
Go to UniProtKB:  Q9EY50
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9EY50
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.03α = 90
b = 99.92β = 116.02
c = 45.84γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-02-10
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations