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 
  • R-Value Observed: 0.200 

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This is version 1.2 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: https://doi.org/10.1074/jbc.M112.379156
  • Primary Citation of Related Structures:  
    4AIH, 4AIJ, 4AIK

  • 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 upshifts encountered upon host entry induce conformational changes in the RovA dimer that attenuate DNA binding and render the protein more susceptible to proteolysis ...

    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

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSCRIPTIONAL REGULATOR SLYAA, B151Yersinia pseudotuberculosisMutation(s): 2 
UniProt
Find proteins for B1JJ73 (Yersinia pseudotuberculosis serotype O:3 (strain YPIII))
Explore B1JJ73 
Go to UniProtKB:  B1JJ73
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB1JJ73
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
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
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.678α = 90
b = 88.678β = 90
c = 67.503γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-12
    Type: Initial release
  • Version 1.1: 2012-10-31
    Changes: Database references
  • Version 1.2: 2019-08-28
    Changes: Data collection, Experimental preparation