6MPS

TagT bound to LIIa-WTA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Substrate Preferences Establish the Order of Cell Wall Assembly in Staphylococcus aureus.

Schaefer, K.Owens, T.W.Kahne, D.Walker, S.

(2018) J. Am. Chem. Soc. 140: 2442-2445

  • DOI: 10.1021/jacs.7b13551
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Gram-positive bacterial cell wall is a large supramolecular structure and its assembly requires coordination of complex biosynthetic pathways. In the step that merges the two major biosynthetic pathways in Staphylococcus aureus cell wall assembly ...

    The Gram-positive bacterial cell wall is a large supramolecular structure and its assembly requires coordination of complex biosynthetic pathways. In the step that merges the two major biosynthetic pathways in Staphylococcus aureus cell wall assembly, conserved protein ligases attach wall teichoic acids to peptidoglycan, but the order of biosynthetic events is a longstanding question. Here, we use a chemical approach to define which of the possible peptidoglycan intermediates are substrates for wall-teichoic acid ligases, thereby establishing the order of cell wall assembly. We have developed a strategy to make defined glycan chain-length polymers of either un-cross-linked or cross-linked peptidoglycan, and we find that wall teichoic acid ligases cannot transfer wall teichoic acid precursors to the cross-linked substrates. A 1.9 Å crystal structure of a LytR-CpsA-Psr (LCP) family ligase in complex with a wall teichoic acid precursor defines the location of the peptidoglycan binding site as a long, narrow groove, and suggests that the basis for selectivity is steric exclusion of cross-linked peptidoglycan. Consistent with this hypothesis, we have found that chitin oligomers are good substrates for transfer, showing that LCPs do not discriminate cross-linked from un-cross-linked peptidoglycan substrates by recognizing features of the un-cross-linked stem peptide. We conclude that wall teichoic acids are coupled to un-cross-linked peptidoglycan chains at an early stage of peptidoglycan synthesis and may create marks that define the proper spacing of subsequent cross-links.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyisoprenyl-teichoic acid--peptidoglycan teichoic acid transferase TagT
A
286Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: tagT (ywtF)
EC: 2.7.8.-
Find proteins for Q7WY78 (Bacillus subtilis (strain 168))
Go to UniProtKB:  Q7WY78
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
JXD
Query on JXD

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Download CCD File 
A
2-(acetylamino)-4-O-[2-(acetylamino)-2-deoxy-beta-D-mannopyranosyl]-2-deoxy-1-O-[(S)-{[(R)-{[(2Z,6Z,10Z,14E,18E)-3,7,11,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaen-1-yl]oxy}(hydroxy)phosphoryl]oxy}(hydroxy)phosphoryl]-alpha-D-glucopyranose
C46 H78 N2 O17 P2
MUXGVGLOWSLCMK-NSGWRCNHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.216 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 66.373α = 90.00
b = 66.373β = 90.00
c = 145.060γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM076710
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesU19 AI109764
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM066174

Revision History 

  • Version 1.0: 2018-10-17
    Type: Initial release