4K48

Structure of the Streptococcus pneumoniae leucyl-tRNA synthetase editing domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Discovery of a potent benzoxaborole-based anti-pneumococcal agent targeting leucyl-tRNA synthetase

Hu, Q.H.Liu, R.J.Fang, Z.P.Zhang, J.Ding, Y.Y.Tan, M.Wang, M.Pan, W.Zhou, H.C.Wang, E.D.

(2013) Sci Rep 3: 2475-2475

  • DOI: 10.1038/srep02475
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Streptococcus pneumoniae causes bacterial pneumonia with high mortality and morbidity. The emergency of multidrug-resistant bacteria threatens the treatment of the disease. Leucyl-tRNA synthetase (LeuRS) plays an essential role in cellular translatio ...

    Streptococcus pneumoniae causes bacterial pneumonia with high mortality and morbidity. The emergency of multidrug-resistant bacteria threatens the treatment of the disease. Leucyl-tRNA synthetase (LeuRS) plays an essential role in cellular translation and is an attractive drug target for antimicrobial development. Here we report the compound ZCL039, a benzoxaborole-based derivative of AN2690, as a potent anti-pneumococcal agent that inhibits S. pneumoniae LeuRS (SpLeuRS) activity. We show using kinetic, biochemical analyses combined with the crystal structure of ZCL039-AMP in complex with the separated SpLeuRS editing domain, that ZCL039 binds to the LeuRS editing active site which requires the presence of tRNA(Leu), and employs an uncompetitive inhibition mechanism. Further docking models establish that ZCL039 clashes with the eukaryal/archaeal specific insertion I4ae helix within editing domains. These findings demonstrate the potential of benzoxaboroles as effective LeuRS inhibitors for pneumococcus infection therapy, and provide future structure-guided drug design and optimization.


    Organizational Affiliation

    1] State Key Laboratory of Molecular Biology, Center for RNA research, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, The Chinese Academy of Sciences, Shanghai 200031, China [2].




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Leucine--tRNA ligase
A
192Streptococcus pneumoniae (strain ATCC 700669 / Spain 23F-1)Mutation(s): 1 
Gene Names: leuS
EC: 6.1.1.4
Find proteins for B8ZKS5 (Streptococcus pneumoniae (strain ATCC 700669 / Spain 23F-1))
Go to UniProtKB:  B8ZKS5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 88.018α = 90.00
b = 88.018β = 90.00
c = 135.405γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release