3L3P

Crystal structure of the C-terminal domain of Shigella type III effector IpaH9.8, with a novel domain swap


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.289 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A disulfide driven domain swap switches off the activity of Shigella IpaH9.8 E3 ligase

Seyedarabi, A.Sullivan, J.A.Sasakawa, C.Pickersgill, R.W.

(2010) Febs Lett. 584: 4163-4168

  • DOI: 10.1016/j.febslet.2010.09.006

  • PubMed Abstract: 
  • We show that the monomeric form of Shigella IpaH9.8 E3 ligase catalyses the ubiquitination of human U2AF35 in vitro, providing a molecular mechanism for the observed in vivo effect. We further discover that under non-reducing conditions IpaH9.8 under ...

    We show that the monomeric form of Shigella IpaH9.8 E3 ligase catalyses the ubiquitination of human U2AF35 in vitro, providing a molecular mechanism for the observed in vivo effect. We further discover that under non-reducing conditions IpaH9.8 undergoes a domain swap driven by the formation of a disulfide bridge involving the catalytic cysteine and that this dimer is unable to catalyse the ubiquitination of U2AF35. The crystal structure of the domain-swapped dimer is presented. The redox inactivation of IpaH9.8 could be a mechanism of regulating the activity of the IpaH9.8 E3 ligase in response to cell damage so that the host cell in which the bacteria resides is maintained in a benign state suitable for bacterial survival.


    Organizational Affiliation

    School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom. a.seyedarabi@qmul.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IpaH9.8
A
293Shigella flexneriMutation(s): 0 
Gene Names: ipaH9.8
EC: 2.3.2.27
Find proteins for Q8VSC3 (Shigella flexneri)
Go to UniProtKB:  Q8VSC3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.289 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 92.659α = 90.00
b = 92.659β = 90.00
c = 135.612γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance