4AIK

Crystal structure of RovA from Yersinia in complex with an invasin promoter fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for Intrinsic Thermosensing by the Master Virulence Regulator Rova of Yersinia.

Quade, N.Mendonca, C.Herbst, K.Heroven, A.K.Ritter, C.Heinz, D.W.Dersch, P.

(2012) J.Biol.Chem. 287: 35796

  • DOI: 10.1074/jbc.M112.379156
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pathogens often rely on thermosensing to adjust virulence gene expression. In yersiniae, important virulence-associated traits are under the control of the master regulator RovA, which uses a built-in thermosensor to control its activity. Thermal ups ...

    Pathogens often rely on thermosensing to adjust virulence gene expression. In yersiniae, important virulence-associated traits are under the control of the master regulator RovA, which uses a built-in thermosensor to control its activity. Thermal upshifts encountered upon host entry induce conformational changes in the RovA dimer that attenuate DNA binding and render the protein more susceptible to proteolysis. Here, we report the crystal structure of RovA in the free and DNA-bound forms and provide evidence that thermo-induced loss of RovA activity is promoted mainly by a thermosensing loop in the dimerization domain and residues in the adjacent C-terminal helix. These determinants allow partial unfolding of the regulator upon an upshift to 37 °C. This structural distortion is transmitted to the flexible DNA-binding domain of RovA. RovA contacts mainly the DNA backbone in a low-affinity binding mode, which allows the immediate release of RovA from its operator sites. We also show that SlyA, a close homolog of RovA from Salmonella with a very similar structure, is not a thermosensor and remains active and stable at 37 °C. Strikingly, changes in only three amino acids, reflecting evolutionary replacements in SlyA, result in a complete loss of the thermosensing properties of RovA and prevent degradation. In conclusion, only minor alterations can transform a thermotolerant regulator into a thermosensor that allows adjustment of virulence and fitness determinants to their thermal environment.


    Organizational Affiliation

    Department of Molecular Structural Biology, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTIONAL REGULATOR SLYA
A, B
151Yersinia pseudotuberculosis serotype O:3 (strain YPIII)Mutation(s): 2 
Gene Names: slyA
Find proteins for B1JJ73 (Yersinia pseudotuberculosis serotype O:3 (strain YPIII))
Go to UniProtKB:  B1JJ73
Entity ID: 2
MoleculeChainsLengthOrganism
ROVA PROMOTER FRAGMENT, 5'-D(*AP*TP*GP*AP*TP*AP*TP*TP *AP*TP**TP*TP*AP*TP*AP*TP*GP*AP*TP*AP*A)-3'C21Yersinia pseudotuberculosis
Entity ID: 3
MoleculeChainsLengthOrganism
ROVA PROMOTER FRAGMENT, 5'-D(*TP*TP*TP*AP*TP*CP*AP*TP *AP*TP*AP*AP*AP*TP*AP*AP*TP*AP*TP*CP*A)-3'D21Yersinia pseudotuberculosis
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 88.678α = 90.00
b = 88.678β = 90.00
c = 67.503γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-12
    Type: Initial release
  • Version 1.1: 2012-10-31
    Type: Database references