Crystal structure of the TIR domain from the Arabidopsis Thaliana disease resistance protein RPS4

Experimental Data Snapshot

  • Resolution: 2.05 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report

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Structural Basis for Assembly and Function of a Heterodimeric Plant Immune Receptor.

Williams, S.J.Sohn, K.H.Wan, L.Bernoux, M.Sarris, P.F.Segonzac, C.Ve, T.Ma, Y.Saucet, S.B.Ericsson, D.J.Casey, L.W.Lonhienne, T.Winzor, D.J.Zhang, X.Coerdt, A.Parker, J.E.Dodds, P.N.Kobe, B.Jones, J.D.G.

(2014) Science 344: 299

  • DOI: https://doi.org/10.1126/science.1247357
  • Primary Citation of Related Structures:  
    4C6R, 4C6S, 4C6T

  • PubMed Abstract: 

    Cytoplasmic plant immune receptors recognize specific pathogen effector proteins and initiate effector-triggered immunity. In Arabidopsis, the immune receptors RPS4 and RRS1 are both required to activate defense to three different pathogens. We show that RPS4 and RRS1 physically associate. Crystal structures of the N-terminal Toll-interleukin-1 receptor/resistance (TIR) domains of RPS4 and RRS1, individually and as a heterodimeric complex (respectively at 2.05, 1.75, and 2.65 angstrom resolution), reveal a conserved TIR/TIR interaction interface. We show that TIR domain heterodimerization is required to form a functional RRS1/RPS4 effector recognition complex. The RPS4 TIR domain activates effector-independent defense, which is inhibited by the RRS1 TIR domain through the heterodimerization interface. Thus, RPS4 and RRS1 function as a receptor complex in which the two components play distinct roles in recognition and signaling.

  • Organizational Affiliation

    School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD 4072, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
171Arabidopsis thalianaMutation(s): 0 
Find proteins for Q9XGM3 (Arabidopsis thaliana)
Explore Q9XGM3 
Go to UniProtKB:  Q9XGM3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9XGM3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.05 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.925α = 65.63
b = 78.637β = 78.64
c = 80.668γ = 78.93
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-28
    Type: Initial release
  • Version 1.1: 2023-12-20
    Changes: Data collection, Database references, Other, Refinement description