4RSX

The structure of the effector protein from Pseudomonas syringae pv. tomato strain DC3000


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.162 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure of the effector protein HopA1 from Pseudomonas syringae

Park, Y.Shin, I.Rhee, S.

(2015) J Struct Biol 189: 276-280

  • DOI: 10.1016/j.jsb.2015.02.002
  • Primary Citation of Related Structures:  
    4RSW, 4RSX

  • PubMed Abstract: 
  • Plants have evolved to protect themselves against pathogen attack; in these competitions, many Gram-negative bacteria translocate pathogen-originated proteins known as effectors directly into plant cells to interfere with cellular processes. Effector-triggered immunity (ETI) is a plant defense mechanism in which plant resistance proteins recognize the presence of effectors and initiate immune responses ...

    Plants have evolved to protect themselves against pathogen attack; in these competitions, many Gram-negative bacteria translocate pathogen-originated proteins known as effectors directly into plant cells to interfere with cellular processes. Effector-triggered immunity (ETI) is a plant defense mechanism in which plant resistance proteins recognize the presence of effectors and initiate immune responses. Enhanced disease susceptibility 1 (EDS1) in Arabidopsis thaliana serves as a central node protein for basal immune resistance and ETI by interacting dynamically with other immune regulatory or resistance proteins. Recently, the effector HopA1 from Pseudomonas syringae was shown to affect these EDS1 complexes by binding EDS1 directly and activating the immune response signaling pathway. Here, we report the crystal structure of the effector HopA1 from P. syringae pv. syringae strain 61 and tomato strain DC3000. HopA1, a sequence-unrelated protein to EDS1, has an α+β fold in which the central antiparallel β-sheet is flanked by helices. A similar structural domain, an α/β fold, is one of the two domains in both EDS1 and the EDS1-interacting protein SAG101, and plays a crucial role in forming the EDS1 complex. Further analyses suggest structural similarity and differences between HopA1 and the α/β fold of SAG101, as well as between two HopA1s from different pathovars. Our structural analysis provides a foundation for understanding the molecular basis of the effect of HopA1 on plant immunity.


    Organizational Affiliation

    Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea; Center for Fungal Pathogenesis, Seoul National University, Seoul, Republic of Korea. Electronic address: srheesnu@snu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type III effector HopA1 A257Pseudomonas syringae pv. tomato str. DC3000Mutation(s): 0 
Gene Names: hopA1PSPTO_5354
Find proteins for Q87UE5 (Pseudomonas syringae pv. tomato (strain ATCC BAA-871 / DC3000))
Explore Q87UE5 
Go to UniProtKB:  Q87UE5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.162 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.769α = 90
b = 79.769β = 90
c = 96.472γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-03-11
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Refinement description