3U0J

Crystal structure of ADP-ribosyltransferase HopU1 of Pseudomonas syringae pv. Tomato DC3000


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure function analysis of an ADP-ribosyltransferase type III effector and its RNA-binding target in plant immunity

Jeong, B.-R.Lin, Y.Joe, A.Guo, M.Korneli, C.Yang, H.Wang, P.Yu, M.Cerny, R.L.Staiger, D.Alfano, J.R.Xu, Y.

(2011) J.Biol.Chem. 286: 43272-43281

  • DOI: 10.1074/jbc.M111.290122

  • PubMed Abstract: 
  • The Pseudomonas syringae type III effector HopU1 is a mono-ADP-ribosyltransferase that is injected into plant cells by the type III protein secretion system. Inside the plant cell it suppresses immunity by modifying RNA-binding proteins including the ...

    The Pseudomonas syringae type III effector HopU1 is a mono-ADP-ribosyltransferase that is injected into plant cells by the type III protein secretion system. Inside the plant cell it suppresses immunity by modifying RNA-binding proteins including the glycine-rich RNA-binding protein GRP7. The crystal structure of HopU1 at 2.7-Å resolution reveals two unique protruding loops, L1 and L4, not found in other mono-ADP-ribosyltransferases. Site-directed mutagenesis demonstrates that these loops are essential for substrate recognition and enzymatic activity. HopU1 ADP-ribosylates the conserved arginine 49 of GRP7, and this reduces the ability of GRP7 to bind RNA in vitro. In vivo, expression of GRP7 with Arg-49 replaced with lysine does not complement the reduced immune responses of the Arabidopsis thaliana grp7-1 mutant demonstrating the importance of this residue for GRP7 function. These data provide mechanistic details how HopU1 recognizes this novel type of substrate and highlights the role of GRP7 in plant immunity.


    Organizational Affiliation

    Center for Plant Science Innovation and the Department of Plant Pathology, University of Nebraska, Lincoln, Nebraska 68588-0660, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Type III effector HopU1
B, A
270Pseudomonas syringae pv. tomato (strain DC3000)Gene Names: hopU1
Find proteins for Q88A91 (Pseudomonas syringae pv. tomato (strain DC3000))
Go to UniProtKB:  Q88A91
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.179 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 92.558α = 90.00
b = 92.558β = 90.00
c = 101.626γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2013-07-03
    Type: Database references