Structure and Function of the Stressosome Signalling Hub

  • Jan Pané-Farré
  • Maureen B. Quin
  • Richard J. Lewis
  • Jon Marles-Wright
Part of the Subcellular Biochemistry book series (SCBI, volume 83)


The stressosome is a multi-protein signal integration and transduction hub found in a wide range of bacterial species. The role that the stressosome plays in regulating the transcription of genes involved in the general stress response has been studied most extensively in the Gram-positive model organism Bacillus subtilis. The stressosome receives and relays the signal(s) that initiate a complex phosphorylation-dependent partner switching cascade, resulting in the activation of the alternative sigma factor σB. This sigma factor controls transcription of more than 150 genes involved in the general stress response. X-ray crystal structures of individual components of the stressosome and single-particle cryo-EM reconstructions of stressosome complexes, coupled with biochemical and single cell analyses, have permitted a detailed understanding of the dynamic signalling behaviour that arises from this multi-protein complex. Furthermore, bioinformatics analyses indicate that genetic modules encoding key stressosome proteins are found in a wide range of bacterial species, indicating an evolutionary advantage afforded by stressosome complexes. Interestingly, the genetic modules are associated with a variety of signalling modules encoding secondary messenger regulation systems, as well as classical two-component signal transduction systems, suggesting a diversification in function. In this chapter we review the current research into stressosome systems and discuss the functional implications of the unique structure of these signalling complexes.


Stressosome Bacillus subtilis Phosphorylation Kinase SigmaB RsbR RsbS YtvA 


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Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  • Jan Pané-Farré
    • 1
  • Maureen B. Quin
    • 2
  • Richard J. Lewis
    • 3
  • Jon Marles-Wright
    • 4
  1. 1.Division of Microbial Physiology and Molecular BiologyUniversity of GreifswaldGreifswaldGermany
  2. 2.Department of Biochemistry, Molecular Biology and BiophysicsUniversity of MinnesotaSt. PaulUSA
  3. 3.Institute for Cell and Molecular Biosciences, Faculty of Medical SciencesUniversity of NewcastleNewcastle upon TyneUK
  4. 4.School of BiologyNewcastle UniversityNewcastle upon TyneUK

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