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Trigger factor chaperone acts as a mechanical foldase

Author

Listed:
  • Shubhasis Haldar

    (Columbia University)

  • Rafael Tapia-Rojo

    (Columbia University)

  • Edward C. Eckels

    (Columbia University)

  • Jessica Valle-Orero

    (Columbia University)

  • Julio M. Fernandez

    (Columbia University)

Abstract

Proteins fold under mechanical forces in a number of biological processes, ranging from muscle contraction to co-translational folding. As force hinders the folding transition, chaperones must play a role in this scenario, although their influence on protein folding under force has not been directly monitored yet. Here, we introduce single-molecule magnetic tweezers to study the folding dynamics of protein L in presence of the prototypical molecular chaperone trigger factor over the range of physiological forces (4–10 pN). Our results show that trigger factor increases prominently the probability of folding against force and accelerates the refolding kinetics. Moreover, we find that trigger factor catalyzes the folding reaction in a force-dependent manner; as the force increases, higher concentrations of trigger factor are needed to rescue folding. We propose that chaperones such as trigger factor can work as foldases under force, a mechanism which could be of relevance for several physiological processes.

Suggested Citation

  • Shubhasis Haldar & Rafael Tapia-Rojo & Edward C. Eckels & Jessica Valle-Orero & Julio M. Fernandez, 2017. "Trigger factor chaperone acts as a mechanical foldase," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00771-6
    DOI: 10.1038/s41467-017-00771-6
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    Cited by:

    1. Florian Franz & Rafael Tapia-Rojo & Sabina Winograd-Katz & Rajaa Boujemaa-Paterski & Wenhong Li & Tamar Unger & Shira Albeck & Camilo Aponte-Santamaria & Sergi Garcia-Manyes & Ohad Medalia & Benjamin , 2023. "Allosteric activation of vinculin by talin," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    2. Daniel A. Nissley & Yang Jiang & Fabio Trovato & Ian Sitarik & Karthik B. Narayan & Philip To & Yingzi Xia & Stephen D. Fried & Edward P. O’Brien, 2022. "Universal protein misfolding intermediates can bypass the proteostasis network and remain soluble and less functional," Nature Communications, Nature, vol. 13(1), pages 1-16, December.

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