5DCQ

Crystal structure of bacterial adhesin, FNE from Streptococcus equi spp. equi.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and functional analysis of the fibronectin-binding protein FNE from Streptococcus equi spp. equi.

Tiouajni, M.Durand, D.Blondeau, K.Graille, M.Urvoas, A.Valerio-Lepiniec, M.Guellouz, A.Aumont-Nicaise, M.Minard, P.van Tilbeurgh, H.

(2014) FEBS J. 281: 5513-5531

  • DOI: 10.1111/febs.13092

  • PubMed Abstract: 
  • Streptococcus equi is a horse pathogen belonging to Lancefield group C. Infection by S. equi ssp. equi causes strangles, a serious and highly contagious disease of the upper respiratory tract. S. equi ssp. equi secretes a fibronectin (Fn)-binding pro ...

    Streptococcus equi is a horse pathogen belonging to Lancefield group C. Infection by S. equi ssp. equi causes strangles, a serious and highly contagious disease of the upper respiratory tract. S. equi ssp. equi secretes a fibronectin (Fn)-binding protein, FNE, that does not contain cell wall-anchoring motifs. FNE binds to the gelatin-binding domain (GBD) of Fn, composed of the motifs (6) FI (12) FII (789) FI . FNE lacks the canonical Fn-binding peptide repeats observed in many microbial surface components recognizing adhesive matrix molecules. We found that the interaction between FNE and the human GBD is mediated by the binding of the disordered C-terminal region (residues 208-262) of FNE to the (789) FI GBD subfragment. The crystal structure of FNE showed that it is similar to the minor pilus protein Spy0125 of Streptococcus pyogenes, found at the end of pilus polymers and responsible for adhesion. FNE and Spy0125 both have a superimposable internal thioester bond between highly conserved Cys and Gln residues. Small-angle X-ray scattering of the FNE-(789) FI complex provided a model that aligns the C-terminal peptide of FNE with the E-strands of the FI domains, adopting the β-zipper extension model observed in previous structures of microbial surface components recognizing adhesive matrix molecule adhesion peptides bound to FI domains.


    Organizational Affiliation

    Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, UMR 8619 CNRS, Université Paris Sud, Orsay, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
artificial repeat proteins (alphaREP3)
A, B, C
170N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fibronectin-binding protein
D, E, F
271Streptococcus equi subsp. equiMutation(s): 0 
Gene Names: fne (fnz_1)
Find proteins for Q93ED6 (Streptococcus equi subsp. equi)
Go to UniProtKB:  Q93ED6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT

Download SDF File 
Download CCD File 
A, B, C, D, E, F
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.167 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 113.688α = 90.00
b = 113.688β = 90.00
c = 152.623γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PDB_EXTRACTdata extraction
MOLREPphasing
REFMACrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-29
    Type: Initial release