3HGK

crystal structure of effect protein AvrptoB complexed with kinase Pto


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.317 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the Complex between Pseudomonas Effector AvrPtoB and the Tomato Pto Kinase Reveals Both a Shared and a Unique Interface Compared with AvrPto-Pto

Dong, J.Xiao, F.Fan, F.Gu, L.Cang, H.Martin, G.B.Chai, J.

(2009) Plant Cell 21: 1846-1859

  • DOI: 10.1105/tpc.109.066878
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Resistance to bacterial speck disease in tomato (Solanum lycopersicum) is activated upon recognition by the host Pto kinase of either one of two sequence-unrelated effector proteins, AvrPto or AvrPtoB, from Pseudomonas syringae pv tomato (Pst). Pto i ...

    Resistance to bacterial speck disease in tomato (Solanum lycopersicum) is activated upon recognition by the host Pto kinase of either one of two sequence-unrelated effector proteins, AvrPto or AvrPtoB, from Pseudomonas syringae pv tomato (Pst). Pto induces Pst immunity by acting in concert with the Prf protein. The recently reported structure of the AvrPto-Pto complex revealed that interaction of AvrPto with Pto appears to relieve an inhibitory effect of Pto, allowing Pto to activate Prf. Here, we present the crystal structure of the Pto binding domain of AvrPtoB (residues 121 to 205) at a resolution of 1.9A and of the AvrPtoB(121-205)-Pto complex at a resolution of 3.3 A. AvrPtoB(121-205) exhibits a tertiary fold that is completely different from that of AvrPto, and its conformation remains largely unchanged upon binding to Pto. In common with AvrPto-Pto, the AvrPtoB-Pto complex relies on two interfaces. One of these interfaces is similar in both complexes, although the primary amino acid sequences from the two effector proteins are very different. Amino acid substitutions in Pto at the other interface disrupt the interaction of AvrPtoB-Pto but not that of AvrPto-Pto. Interestingly, substitutions in Pto affecting this unique interface also cause Pto to induce Prf-dependent host cell death independently of either effector protein.


    Organizational Affiliation

    Institute of Biophysics, Chinese Academy of Sciences, Beijing 100875, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein kinase
A, B, C, D
327Solanum pimpinellifoliumMutation(s): 1 
Gene Names: Pto
Find proteins for Q40234 (Solanum pimpinellifolium)
Go to UniProtKB:  Q40234
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Effector protein hopAB2
E, F, G, H
85Pseudomonas syringae pv. tomato (strain ATCC BAA-871 / DC3000)Mutation(s): 0 
Gene Names: hopAB2 (avrPtoB)
Find proteins for Q8RSY1 (Pseudomonas syringae pv. tomato (strain ATCC BAA-871 / DC3000))
Go to UniProtKB:  Q8RSY1
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B, C, D
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A, B, C, D
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.317 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 61.070α = 90.00
b = 104.470β = 90.00
c = 298.860γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
REFMACrefinement
MOLREPphasing
HKL-2000data collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance