LytR-CPS2A-psr family protein YwtF (TagT) with bound octaprenyl pyrophosphate lipid

Experimental Data Snapshot

  • Resolution: 1.79 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

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Attachment of Capsular Polysaccharide to the Cell Wall in Streptococcus pneumoniae.

Eberhardt, A.Hoyland, C.N.Vollmer, D.Bisle, S.Cleverley, R.M.Johnsborg, O.Havarstein, L.S.Lewis, R.J.Vollmer, W.

(2012) Microb Drug Resist 18: 240-255

  • DOI: https://doi.org/10.1089/mdr.2011.0232
  • Primary Citation of Related Structures:  
    4DE8, 4DE9

  • PubMed Abstract: 

    Streptococcus pneumoniae protects itself from components of the human immune defense system by a thick polysaccharide capsule, which in most serotypes is covalently attached to the cell wall peptidoglycan. Members of the LytR-Cps2A-Psr (LCP) protein family have recently been implicated in the attachment of anionic polymers to peptidoglycan in Gram-positive bacteria, based on genetic evidence from Bacillus subtilis mutant strains and on the crystal structure of S. pneumoniae Cps2A containing a tightly bound polyprenol (pyro)phosphate lipid. Here, we provide evidence that Cps2A and its two pneumococcal homologs, LytR and Psr, contribute to the maintenance of normal capsule levels and to the retention of the capsular polysaccharide at the cell wall in the capsular type 2 S. pneumoniae strain D39. GFP fusions of all three LCP proteins showed enhanced localization at mid-cell, indicating a role in cell wall growth. Single cps2A or psr mutants produced a reduced amount of capsule. A cps2A lytR double mutant showed greatly impaired growth and cell morphology and lost approximately half of the total capsule material into the culture supernatant. We also present the crystal structure of the B. subtilis LCP protein YwtF and provide crystallographic evidence for the phosphotransferase activity of Cps2A, supporting an enzymatic function in the attachment of capsular polysaccharides to cell wall peptidoglycan.

  • Organizational Affiliation

    Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University , Newcastle upon Tyne, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative transcriptional regulator ywtF286Bacillus subtilisMutation(s): 0 
Gene Names: ywtFBSU35840
Find proteins for Q7WY78 (Bacillus subtilis (strain 168))
Explore Q7WY78 
Go to UniProtKB:  Q7WY78
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7WY78
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on VTP

Download Ideal Coordinates CCD File 
B [auth A](2Z,6Z,10Z,14Z,18Z,22E,26E)-3,7,11,15,19,23,27,31-octamethyldotriaconta-2,6,10,14,18,22,26,30-octaen-1-yl trihydrogen diphosphate
C40 H68 O7 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.79 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.74α = 90
b = 65.74β = 90
c = 137.46γ = 90
Software Package:
Software NamePurpose
GDAdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-06-20
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references, Derived calculations