Solution structure of the folded core of Pseudomonas syringae effector protein, AvrPto

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with favorable non-bond energy 

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This is version 1.5 of the entry. See complete history


The solution structure of type III effector protein AvrPto reveals conformational and dynamic features important for plant pathogenesis.

Wulf, J.Pascuzzi, P.E.Fahmy, A.Martin, G.B.Nicholson, L.K.

(2004) Structure 12: 1257-1268

  • DOI: https://doi.org/10.1016/j.str.2004.04.017
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Pseudomonas syringae pv. tomato, the causative agent of bacterial speck disease of tomato, uses a type III secretion system (TTSS) to deliver effector proteins into the host cell. In resistant plants, the bacterial effector protein AvrPto physically interacts with the host Pto kinase and elicits antibacterial defense responses. In susceptible plants, which lack the Pto kinase, AvrPto acts as a virulence factor to promote bacterial growth. The solution structure of AvrPto reveals a functional core consisting of a three-helix bundle motif flanked by disordered N- and C-terminal tails. Residues required for Pto binding lie in a 19 residue Omega loop. Modeling suggests a hydrophobic patch involving the activation loop of Pto forms a contact surface with the AvrPto Omega loop and that helix packing mediates interactions between AvrPto and putative virulence targets Api2 and Api3. The AvrPto structure has a low stability that may facilitate chaperone-independent secretion by the TTSS.

  • Organizational Affiliation

    Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
avirulence protein115Pseudomonas syringaeMutation(s): 0 
Find proteins for Q08242 (Pseudomonas syringae)
Explore Q08242 
Go to UniProtKB:  Q08242
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UniProt GroupQ08242
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with favorable non-bond energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-10-19
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Database references, Derived calculations
  • Version 1.4: 2022-12-21
    Changes: Database references
  • Version 1.5: 2024-05-22
    Changes: Data collection