2XEX

crystal structure of Staphylococcus aureus elongation factor G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

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This is version 1.1 of the entry. See complete history


Literature

Staphylococcus Aureus Elongation Factor G - Structure and Analysis of a Target for Fusidic Acid.

Chen, Y.Koripella, R.K.Sanyal, S.Selmer, M.

(2010) FEBS J 277: 3789

  • DOI: 10.1111/j.1742-4658.2010.07780.x
  • Primary Citation of Related Structures:  
    2XEX

  • PubMed Abstract: 
  • Fusidic acid (FA) is a bacteriostatic antibiotic that locks elongation factor G (EF-G) on the ribosome in a post-translocational state. It is used clinically against Gram-positive bacteria such as pathogenic strains of Staphylococcus aureus, but no structural information has been available for EF-G from these species ...

    Fusidic acid (FA) is a bacteriostatic antibiotic that locks elongation factor G (EF-G) on the ribosome in a post-translocational state. It is used clinically against Gram-positive bacteria such as pathogenic strains of Staphylococcus aureus, but no structural information has been available for EF-G from these species. We have solved the apo crystal structure of EF-G from S. aureus to 1.9 Å resolution. This structure shows a dramatically different overall conformation from previous structures of EF-G, although the individual domains are highly similar. Between the different structures of free or ribosome-bound EF-G, domains III-V move relative to domains I-II, resulting in a displacement of the tip of domain IV relative to domain G. In S. aureus EF-G, this displacement is about 25 Å relative to structures of Thermus thermophilus EF-G in a direction perpendicular to that in previous observations. Part of the switch I region (residues 46-56) is ordered in a helix, and has a distinct conformation as compared with structures of EF-Tu in the GDP and GTP states. Also, the switch II region shows a new conformation, which, as in other structures of free EF-G, is incompatible with FA binding. We have analysed and discussed all known fusA-based fusidic acid resistance mutations in the light of the new structure of EF-G from S. aureus, and a recent structure of T. thermophilus EF-G in complex with the 70S ribosome with fusidic acid [Gao YG et al. (2009) Science326, 694-699]. The mutations can be classified as affecting FA binding, EF-G-ribosome interactions, EF-G conformation, and EF-G stability.


    Organizational Affiliation

    Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ELONGATION FACTOR G AB693Staphylococcus aureusMutation(s): 0 
Gene Names: fusAfus
Find proteins for P68790 (Staphylococcus aureus)
Explore P68790 
Go to UniProtKB:  P68790
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download Ideal Coordinates CCD File 
A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.16α = 90
b = 137.34β = 94.93
c = 125.36γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance