3VMQ

Crystal structure of Staphylococcus aureus membrane-bound transglycosylase: Apoenzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.518 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of Staphylococcus aureus transglycosylase in complex with a lipid II analog and elucidation of peptidoglycan synthesis mechanism

Huang, C.Y.Shih, H.W.Lin, L.Y.Tien, Y.W.Cheng, T.J.R.Cheng, W.C.Wong, C.H.Ma, C.

(2012) Proc.Natl.Acad.Sci.USA 109: 6496-6501

  • DOI: 10.1073/pnas.1203900109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial transpeptidase and transglycosylase on the surface are essential for cell wall synthesis, and many antibiotics have been developed to target the transpeptidase; however, the problem of antibiotic resistance has arisen and caused a major thr ...

    Bacterial transpeptidase and transglycosylase on the surface are essential for cell wall synthesis, and many antibiotics have been developed to target the transpeptidase; however, the problem of antibiotic resistance has arisen and caused a major threat in bacterial infection. The transglycosylase has been considered to be another excellent target, but no antibiotics have been developed to target this enzyme. Here, we determined the crystal structure of the Staphylococcus aureus membrane-bound transglycosylase, monofunctional glycosyltransferase, in complex with a lipid II analog to 2.3 Å resolution. Our results showed that the lipid II-contacting residues are not only conserved in WT and drug-resistant bacteria but also significant in enzymatic activity. Mechanistically, we proposed that K140 and R148 in the donor site, instead of the previously proposed E156, are used to stabilize the pyrophosphate-leaving group of lipid II, and E100 in the acceptor site acts as general base for the 4-OH of GlcNAc to facilitate the transglycosylation reaction. This mechanism, further supported by mutagenesis study and the structure of monofunctional glycosyltransferase in complex with moenomycin in the donor site, provides a direction for antibacterial drugs design.


    Organizational Affiliation

    Genomics Research Center, Academia Sinica, Taipei 115, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monofunctional glycosyltransferase
A, B
263Staphylococcus aureus (strain Mu50 / ATCC 700699)Mutation(s): 0 
Gene Names: mgt
EC: 2.4.1.129
Membrane protein
mpstruct
Group: 
MONOTOPIC MEMBRANE PROTEINS
Sub Group: 
Glycosyltransferases
Protein: 
Monofunctional glycosyltransferase in complex with Lipid II analog
Find proteins for Q99T05 (Staphylococcus aureus (strain Mu50 / ATCC 700699))
Go to UniProtKB:  Q99T05
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.518 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 66.683α = 90.00
b = 67.406β = 90.00
c = 152.810γ = 90.00
Software Package:
Software NamePurpose
PHASESphasing
HKL-2000data scaling
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-18
    Type: Initial release
  • Version 1.1: 2013-07-17
    Type: Database references