3HZS

S. aureus monofunctional glycosyltransferase (MtgA)in complex with moenomycin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Characterization of the active site of S. aureus monofunctional glycosyltransferase (Mtg) by site-directed mutation and structural analysis of the protein complexed with moenomycin

Heaslet, H.Shaw, B.Mistry, A.Miller, A.A.

(2009) J.Struct.Biol. 167: 129-135

  • DOI: 10.1016/j.jsb.2009.04.010
  • Also Cited By: 6FTB

  • PubMed Abstract: 
  • Bacterial cell wall transglycosylases (TGs) and transpeptidases (TPs) are ideal drug targets due to their essentiality, accessibility and lack of mammalian homologs. Although antibacterial therapy using the beta-lactam family of TP inhibitors has bee ...

    Bacterial cell wall transglycosylases (TGs) and transpeptidases (TPs) are ideal drug targets due to their essentiality, accessibility and lack of mammalian homologs. Although antibacterial therapy using the beta-lactam family of TP inhibitors has been successful for decades, potent TG inhibitors which are suitable for development into antibiotics for human use have yet to be identified. We sought to further understand the molecular interactions required to inhibit bacterial transglycosylation by characterizing the active site of Staphylococcus aureus (Sa) monofunctional transglycosylase (Mtg). Ten mutants were tested for their ability to polymerize Lipid II and to crystallize in the presence of moenomycin. Five of six putative active site mutants (E100Q, D101N, Q136E, E156T, and Y176F) were found to be catalytically inactive whereas a F104Y mutation did not affect activity. Four mutants generated to enhance crystal formation (F143T, V154T, L157T, and F158T) also retained activity. Here we also report the crystal structure of Sa Mtg E100Q mutant in complex with the inhibitor moenomycin to 2.1A resolution. The co-crystal structure revealed detailed interactions between the protein and inhibitor including portions of the polycarbon tail of moenomycin. The structure also contained an ordered phosphate ion which helped to identify the Lipid II binding site.


    Organizational Affiliation

    Antibacterial Discovery Chemistry, Pfizer Global Research & Development, Groton, CT 06340, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monofunctional glycosyltransferase
A
209Staphylococcus aureus (strain MW2)Mutation(s): 1 
Gene Names: mgt
EC: 2.4.1.129
Find proteins for Q7A0I6 (Staphylococcus aureus (strain MW2))
Go to UniProtKB:  Q7A0I6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
M0E
Query on M0E

Download SDF File 
Download CCD File 
A
MOENOMYCIN
MOENOMYCIN
C69 H106 N5 O34 P
NXPRJQIAIORCGO-ZLPAOQQDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.189 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 114.422α = 90.00
b = 114.422β = 90.00
c = 128.844γ = 120.00
Software Package:
Software NamePurpose
CrystalCleardata collection
REFMACrefinement
AMoREphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Source and taxonomy, Version format compliance
  • Version 1.2: 2012-07-25
    Type: Other