1. Biochemistry and Chemical Biology
  2. Cell Biology
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A composition-dependent molecular clutch between T cell signaling condensates and actin

  1. Jonathon A Ditlev
  2. Anthony R Vega
  3. Darius Vasco Köster
  4. Xiaolei Su
  5. Tomomi Tani
  6. Ashley M Lakoduk
  7. Ronald D Vale
  8. Satyajit Mayor  Is a corresponding author
  9. Khuloud Jaqaman  Is a corresponding author
  10. Michael K Rosen  Is a corresponding author
  1. Marine Biological Laboratory, United States
  2. University of Texas Southwestern Medical Center, United States
Research Article
  • Cited 12
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Cite this article as: eLife 2019;8:e42695 doi: 10.7554/eLife.42695

Abstract

During T cell activation, biomolecular condensates form at the immunological synapse (IS) through multivalency-driven phase separation of LAT, Grb2, Sos1, SLP-76, Nck, and WASP. These condensates move radially at the IS, traversing successive radially-oriented and concentric actin networks. To understand this movement, we biochemically reconstituted LAT condensates with actomyosin filaments. We found that basic regions of Nck and N-WASP/WASP promote association and co-movement of LAT condensates with actin, indicating conversion of weak individual affinities to high collective affinity upon phase separation. Condensates lacking these components were propelled differently, without strong actin adhesion. In cells, LAT condensates lost Nck as radial actin transitioned to the concentric network, and engineered condensates constitutively binding actin moved aberrantly. Our data show that Nck and WASP form a clutch between LAT condensates and actin in vitro and suggest that compositional changes may enable condensate movement by distinct actin networks in different regions of the IS.

Article and author information

Author details

  1. Jonathon A Ditlev

    Howard Hughes Medical Institute Summer Institute, Marine Biological Laboratory, Woods Hole, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8287-7700
  2. Anthony R Vega

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-4464-6482
  3. Darius Vasco Köster

    Howard Hughes Medical Institute Summer Institute, Marine Biological Laboratory, Woods Hole, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8530-5476
  4. Xiaolei Su

    Howard Hughes Medical Institute Summer Institute, Marine Biological Laboratory, Woods Hole, United States
    Competing interests
    The authors declare that no competing interests exist.
  5. Tomomi Tani

    Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, Woods Hole, United States
    Competing interests
    The authors declare that no competing interests exist.
  6. Ashley M Lakoduk

    Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, United States
    Competing interests
    The authors declare that no competing interests exist.
  7. Ronald D Vale

    Howard Hughes Medical Institute Summer Institute, Marine Biological Laboratory, Woods Hole, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0003-3460-2758
  8. Satyajit Mayor

    Howard Hughes Medical Institute Summer Institute, Marine Biological Laboratory, Woods Hole, United States
    For correspondence
    mayor@ncbs.res.in
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-9842-6963
  9. Khuloud Jaqaman

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, United States
    For correspondence
    khuloud.jaqaman@utsouthwestern.edu
    Competing interests
    The authors declare that no competing interests exist.
  10. Michael K Rosen

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, United States
    For correspondence
    michael.rosen@utsouthwestern.edu
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-0775-7917

Funding

Howard Hughes Medical Institute

  • Ronald D Vale
  • Michael K Rosen

Cancer Research Institute

  • Xiaolei Su

National Institutes of Health (R35 GM119619)

  • Khuloud Jaqaman

National Institutes of Health (F32 DK101188)

  • Jonathon A Ditlev

Welch Foundation (I-1544)

  • Michael K Rosen

Department of Science and Technology, Government of India (J C Bose Fellowship)

  • Satyajit Mayor

Margadarshi Fellowship from the Wellcome Trust - Department of Biotechnology, India Alliance (IA/M/15/1/502018)

  • Satyajit Mayor

National Institutes of Health (R01 GM100160)

  • Tomomi Tani

UT Southwestern Endowed Scholars Program

  • Khuloud Jaqaman

National Research Service Award F32 (F32 DK101188)

  • Jonathon A Ditlev

CPRIT Training Grant (RP140110 PI: Michael White)

  • Anthony R Vega

AXA Research Fund and the National Centre for Biological Sciences, Tata Institute for Fundamental Research

  • Darius Vasco Köster

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Reviewing Editor

  1. Anthony A Hyman, Max Planck Institute of Molecular Cell Biology and Genetics, Germany

Publication history

  1. Received: October 9, 2018
  2. Accepted: June 14, 2019
  3. Accepted Manuscript published: July 3, 2019 (version 1)
  4. Version of Record published: July 11, 2019 (version 2)

Copyright

© 2019, Ditlev et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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