4B8V

Cladosporium fulvum LysM effector Ecp6 in complex with a beta-1,4- linked N-acetyl-D-glucosamine tetramer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Fungal Effector Ecp6 Outcompetes Host Immune Receptor for Chitin Binding Through Intrachain Lysm Dimerization

Sanchez-Vallet, A.Saleem-Batcha, R.Kombrink, A.Hansen, G.Valkenburg, D.J.Thomma, B.P.H.J.Mesters, J.R.

(2013) Elife 2: 00790

  • DOI: 10.7554/eLife.00790
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • While host immune receptors detect pathogen-associated molecular patterns to activate immunity, pathogens attempt to deregulate host immunity through secreted effectors. Fungi employ LysM effectors to prevent recognition of cell wall-derived chitin b ...

    While host immune receptors detect pathogen-associated molecular patterns to activate immunity, pathogens attempt to deregulate host immunity through secreted effectors. Fungi employ LysM effectors to prevent recognition of cell wall-derived chitin by host immune receptors, although the mechanism to compete for chitin binding remained unclear. Structural analysis of the LysM effector Ecp6 of the fungal tomato pathogen Cladosporium fulvum reveals a novel mechanism for chitin binding, mediated by intrachain LysM dimerization, leading to a chitin-binding groove that is deeply buried in the effector protein. This composite binding site involves two of the three LysMs of Ecp6 and mediates chitin binding with ultra-high (pM) affinity. Intriguingly, the remaining singular LysM domain of Ecp6 binds chitin with low micromolar affinity but can nevertheless still perturb chitin-triggered immunity. Conceivably, the perturbation by this LysM domain is not established through chitin sequestration but possibly through interference with the host immune receptor complex. DOI:http://dx.doi.org/10.7554/eLife.00790.001.


    Related Citations: 
    • Conserved Fungal Lysm Effector Ecp6 Prevents Chitin-Triggered Immunity in Plants.
      De Jonge, R.,Van Esse, H.P.,Kombrink, A.,Shinya, T.,Desaki, Y.,Bours, R.,Van Der Krol, S.,Shibuya, N.,Joosten, M.H.A.J.,Thomma, B.P.H.J.
      (2010) Science 329: 953


    Organizational Affiliation

    Centro de Biotecnología y Genómica de Plantas , Universidad Politécnica de Madrid , Madrid , Spain ; Laboratory of Phytopathology , Wageningen University , Wageningen , Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EXTRACELLULAR PROTEIN 6
A
228Passalora fulvaMutation(s): 0 
Find proteins for B3VBK9 (Passalora fulva)
Go to UniProtKB:  B3VBK9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDG
Query on NDG

Download SDF File 
Download CCD File 
A
2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE
C8 H15 N O6
OVRNDRQMDRJTHS-PVFLNQBWSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.203 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 57.500α = 90.00
b = 57.500β = 90.00
c = 118.730γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-09-25
    Type: Database references