5JUI

domain-swapped dimer of the the KRT10-binding region (BR) of PsrP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The BR domain of PsrP interacts with extracellular DNA to promote bacterial aggregation; structural insights into pneumococcal biofilm formation.

Schulte, T.Mikaelsson, C.Beaussart, A.Kikhney, A.Deshmukh, M.Wolniak, S.Pathak, A.Ebel, C.Lofling, J.Fogolari, F.Henriques-Normark, B.Dufrene, Y.F.Svergun, D.Nygren, P.A.Achour, A.

(2016) Sci Rep 6: 32371-32371

  • DOI: 10.1038/srep32371

  • PubMed Abstract: 
  • The major human pathogen Streptococcus pneumoniae is a leading cause of disease and death worldwide. Pneumococcal biofilm formation within the nasopharynx leads to long-term colonization and persistence within the host. We have previously demonstrate ...

    The major human pathogen Streptococcus pneumoniae is a leading cause of disease and death worldwide. Pneumococcal biofilm formation within the nasopharynx leads to long-term colonization and persistence within the host. We have previously demonstrated that the capsular surface-associated pneumococcal serine rich repeat protein (PsrP), key factor for biofilm formation, binds to keratin-10 (KRT10) through its microbial surface component recognizing adhesive matrix molecule (MSCRAMM)-related globular binding region domain (BR187-385). Here, we show that BR187-385 also binds to DNA, as demonstrated by electrophoretic mobility shift assays and size exclusion chromatography. Further, heterologous expression of BR187-378 or the longer BR120-378 construct on the surface of a Gram-positive model host bacterium resulted in the formation of cellular aggregates that was significantly enhanced in the presence of DNA. Crystal structure analyses revealed the formation of BR187-385 homo-dimers via an intermolecular β-sheet, resulting in a positively charged concave surface, shaped to accommodate the acidic helical DNA structure. Furthermore, small angle X-ray scattering and circular dichroism studies indicate that the aggregate-enhancing N-terminal region of BR120-166 adopts an extended, non-globular structure. Altogether, our results suggest that PsrP adheres to extracellular DNA in the biofilm matrix and thus promotes pneumococcal biofilm formation.


    Related Citations: 
    • The basic keratin 10-binding domain of the virulence-associated pneumococcal serine-rich protein PsrP adopts a novel MSCRAMM fold.
      Schulte, T.,Loefling, J.,Mikaelsson, C.,Kikhney, A.,Hentrich, K.,Diamante, A.,Ebel, C.,Normark, S.,Svergun, D.,Henriques-Normark, B.,Achour, A.
      (2014) Open Biol 4: 130090


    Organizational Affiliation

    Science for Life Laboratory, Department of Medicine Solna, Karolinska Institute, and Department of Infectious Diseases, Karolinska University Hospital, Solna, SE-17176 Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell wall surface anchor family protein
A, B, C
198Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)Mutation(s): 0 
Find proteins for A0A0H2URK1 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Go to UniProtKB:  A0A0H2URK1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.211 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 109.827α = 90.00
b = 162.367β = 90.00
c = 102.092γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden--
Knut and Alice Wallenberg FoundationSweden--
Wenner-Gren FoundationSweden--
European UnionSwedenFP7/2007-2013

Revision History 

  • Version 1.0: 2017-03-15
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence