4PUF

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.272 
  • R-Value Observed: 0.274 

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
  • Primary Citation of Related Structures:  
    4PUF

  • 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

    †Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Apartado 1095, 41080 Sevilla, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase SlrPAB637Salmonella enterica subsp. enterica serovar Typhimurium str. 14028SMutation(s): 0 
Gene Names: slrPSTM14_928
EC: 6.3.2 (PDB Primary Data), 2.3.2.27 (UniProt)
Find proteins for D0ZRB2 (Salmonella typhimurium (strain 14028s / SGSC 2262))
Explore D0ZRB2 
Go to UniProtKB:  D0ZRB2
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ThioredoxinCD117Homo sapiensMutation(s): 0 
Gene Names: TXNTRDXTRXTRX1
Find proteins for P10599 (Homo sapiens)
Explore P10599 
Go to UniProtKB:  P10599
NIH Common Fund Data Resources
PHAROS  P10599
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.272 
  • R-Value Observed: 0.274 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.29α = 90
b = 134.83β = 90
c = 154.62γ = 90
Software Package:
Software NamePurpose
DNAdata collection
SHELXSphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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