4PUF

Complex between the Salmonella T3SS effector SlrP and its human target thioredoxin-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.296 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.272 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of the Slrp-Trx1 complex sheds light on the autoinhibition mechanism of the type III secretion system effectors of the NEL family.

Zouhir, S.Bernal-Bayard, J.Cordero-Alba, M.Cardenal-Munoz, E.Guimaraes, B.Lazar, N.Ramos-Morales, F.Nessler, S.

(2014) Biochem.J. 464: 135-144

  • DOI: 10.1042/BJ20140587

  • PubMed Abstract: 
  • Salmonella infections are a leading cause of bacterial foodborne illness in the U.S.A. and the European Union Antimicrobial therapy is often administered to treat the infection, but increasingly isolates are being detected that demonstrate resistance ...

    Salmonella infections are a leading cause of bacterial foodborne illness in the U.S.A. and the European Union Antimicrobial therapy is often administered to treat the infection, but increasingly isolates are being detected that demonstrate resistance to multiple antibiotics. Salmonella enterica contains two virulence-related T3SS (type III secretion systems): one promotes invasion of the intestine and the other one mediates systemic disease. Both of them secrete the SlrP protein acting as E3 ubiquitin ligase in human host cells where it targets Trx1 (thioredoxin-1). SlrP belongs to the NEL family of bacterial E3 ubiquitin ligases that have been observed in two distinct autoinhibitory conformations. We solved the 3D structure of the SlrP-Trx1 complex and determined the Trx1 ubiquitination site. The description of the substrate-binding mode sheds light on the first step of the activation mechanism of SlrP. Comparison with the available structural data of other NEL effectors allowed us to gain new insights into their autoinhibitory mechanism. We propose a molecular mechanism for the regulation of SlrP in which structural constraints sequestrating the NEL domain would be sequentially released. This work thus constitutes a new milestone in the understanding of how these T3SS effectors influence pathogen virulence. It also provides the fundamental basis for future development of new antimicrobials.


    Organizational Affiliation

    *Laboratoire d'Enzymologie et Biochimie Structurales (LEBS), CNRS UPR 3082, 91198 Gif sur Yvette, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase SlrP
A, B
637Salmonella typhimurium (strain 14028s / SGSC 2262)Mutation(s): 0 
Gene Names: slrP
EC: 2.3.2.27
Find proteins for D0ZRB2 (Salmonella typhimurium (strain 14028s / SGSC 2262))
Go to UniProtKB:  D0ZRB2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin
C, D
117Homo sapiensMutation(s): 0 
Gene Names: TXN (TRDX, TRX, TRX1)
Find proteins for P10599 (Homo sapiens)
Go to Gene View: TXN
Go to UniProtKB:  P10599
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.296 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.272 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 106.290α = 90.00
b = 134.830β = 90.00
c = 154.620γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
PHENIXrefinement
DNAdata collection
SHELXSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2014-11-05
    Type: Database references