2FD4

Crystal Structure of AvrPtoB (436-553)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A bacterial inhibitor of host programmed cell death defenses is an E3 ubiquitin ligase.

Janjusevic, R.Abramovitch, R.B.Martin, G.B.Stebbins, C.E.

(2006) Science 311: 222-226

  • DOI: 10.1126/science.1120131
  • Primary Citation of Related Structures:  
    2FD4

  • PubMed Abstract: 
  • The Pseudomonas syringae protein AvrPtoB is translocated into plant cells, where it inhibits immunity-associated programmed cell death (PCD). The structure of a C-terminal domain of AvrPtoB that is essential for anti-PCD activity reveals an unexpected homology to the U-box and RING-finger components of eukaryotic E3 ubiquitin ligases, and we show that AvrPtoB has ubiquitin ligase activity ...

    The Pseudomonas syringae protein AvrPtoB is translocated into plant cells, where it inhibits immunity-associated programmed cell death (PCD). The structure of a C-terminal domain of AvrPtoB that is essential for anti-PCD activity reveals an unexpected homology to the U-box and RING-finger components of eukaryotic E3 ubiquitin ligases, and we show that AvrPtoB has ubiquitin ligase activity. Mutation of conserved residues involved in the binding of E2 ubiquitin-conjugating enzymes abolishes this activity in vitro, as well as anti-PCD activity in tomato leaves, which dramatically decreases virulence. These results show that Pseudomonas syringae uses a mimic of host E3 ubiquitin ligases to inactivate plant defenses.


    Organizational Affiliation

    Laboratory of Structural Microbiology, Rockefeller University, New York, NY 10021, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
avirulence protein AvrptoB A122Pseudomonas syringaeMutation(s): 0 
EC: 2.3.2
Find proteins for Q8RSY1 (Pseudomonas syringae pv. tomato (strain ATCC BAA-871 / DC3000))
Explore Q8RSY1 
Go to UniProtKB:  Q8RSY1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.863α = 90
b = 61.863β = 90
c = 60.419γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
RESOLVEphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-12-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description