Crystal structure of the effector AvrLm5-9 from Leptosphaeria maculans

Experimental Data Snapshot

  • Resolution: 2.14 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


A new family of structurally conserved fungal effectors displays epistatic interactions with plant resistance proteins.

Lazar, N.Mesarich, C.H.Petit-Houdenot, Y.Talbi, N.Li de la Sierra-Gallay, I.Zelie, E.Blondeau, K.Gracy, J.Ollivier, B.Blaise, F.Rouxel, T.Balesdent, M.H.Idnurm, A.van Tilbeurgh, H.Fudal, I.

(2022) PLoS Pathog 18: e1010664-e1010664

  • DOI: https://doi.org/10.1371/journal.ppat.1010664
  • Primary Citation of Related Structures:  
    6ZUQ, 6ZUS, 7AD5, 7B76

  • PubMed Abstract: 

    Recognition of a pathogen avirulence (AVR) effector protein by a cognate plant resistance (R) protein triggers a set of immune responses that render the plant resistant. Pathogens can escape this so-called Effector-Triggered Immunity (ETI) by different mechanisms including the deletion or loss-of-function mutation of the AVR gene, the incorporation of point mutations that allow recognition to be evaded while maintaining virulence function, and the acquisition of new effectors that suppress AVR recognition. The Dothideomycete Leptosphaeria maculans, causal agent of oilseed rape stem canker, is one of the few fungal pathogens where suppression of ETI by an AVR effector has been demonstrated. Indeed, AvrLm4-7 suppresses Rlm3- and Rlm9-mediated resistance triggered by AvrLm3 and AvrLm5-9, respectively. The presence of AvrLm4-7 does not impede AvrLm3 and AvrLm5-9 expression, and the three AVR proteins do not appear to physically interact. To decipher the epistatic interaction between these L. maculans AVR effectors, we determined the crystal structure of AvrLm5-9 and obtained a 3D model of AvrLm3, based on the crystal structure of Ecp11-1, a homologous AVR effector candidate from Fulvia fulva. Despite a lack of sequence similarity, AvrLm5-9 and AvrLm3 are structural analogues of AvrLm4-7 (structure previously characterized). Structure-informed sequence database searches identified a larger number of putative structural analogues among L. maculans effector candidates, including the AVR effector AvrLmS-Lep2, all produced during the early stages of oilseed rape infection, as well as among effector candidates from other phytopathogenic fungi. These structural analogues are named LARS (for Leptosphaeria AviRulence and Suppressing) effectors. Remarkably, transformants of L. maculans expressing one of these structural analogues, Ecp11-1, triggered oilseed rape immunity in several genotypes carrying Rlm3. Furthermore, this resistance could be suppressed by AvrLm4-7. These results suggest that Ecp11-1 shares a common activity with AvrLm3 within the host plant which is detected by Rlm3, or that the Ecp11-1 structure is sufficiently close to that of AvrLm3 to be recognized by Rlm3.

  • Organizational Affiliation

    Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Avirulence protein LmJ1125Plenodomus lingamMutation(s): 0 
Gene Names: AvrLmJ1Lema_uP070880.2
Find proteins for V5TFR9 (Leptosphaeria maculans)
Explore V5TFR9 
Go to UniProtKB:  V5TFR9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupV5TFR9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.14 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.24α = 90
b = 57.24β = 90
c = 119.53γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
French National Research AgencyFranceANR-14-CE19-0019
French National Research AgencyFranceANR-17-EUR-0007
French Infrastructure for Integrated Structural Biology (FRISBI)FranceANR-10-INBS-05
Centre National de la Recherche Scientifique (CNRS)France--
French National Research AgencyFranceANR-13-BS07-0007-01 to EG

Revision History  (Full details and data files)

  • Version 1.0: 2021-10-06
    Type: Initial release
  • Version 1.1: 2022-07-27
    Changes: Database references