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Membrane tension controls the assembly of curvature-generating proteins

Author

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  • Mijo Simunovic

    (Institute for Biophysical Dynamics, James Franck Institute and Computation Institute, The University of Chicago)

  • Gregory A. Voth

    (Institute for Biophysical Dynamics, James Franck Institute and Computation Institute, The University of Chicago)

Abstract

Proteins containing a Bin/Amphiphysin/Rvs (BAR) domain regulate membrane curvature in the cell. Recent simulations have revealed that BAR proteins assemble into linear aggregates, strongly affecting membrane curvature and its in-plane stress profile. Here, we explore the opposite question: do mechanical properties of the membrane impact protein association? By using coarse-grained molecular dynamics simulations, we show that increased surface tension significantly impacts the dynamics of protein assembly. While tensionless membranes promote a rapid formation of long-living linear aggregates of N-BAR proteins, increase in tension alters the geometry of protein association. At high tension, protein interactions are strongly inhibited. Increasing surface density of proteins leads to a wider range of protein association geometries, promoting the formation of meshes, which can be broken apart with membrane tension. Our work indicates that surface tension may play a key role in recruiting proteins to membrane-remodelling sites in the cell.

Suggested Citation

  • Mijo Simunovic & Gregory A. Voth, 2015. "Membrane tension controls the assembly of curvature-generating proteins," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8219
    DOI: 10.1038/ncomms8219
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    Cited by:

    1. Anabel-Lise Le Roux & Caterina Tozzi & Nikhil Walani & Xarxa Quiroga & Dobryna Zalvidea & Xavier Trepat & Margarita Staykova & Marino Arroyo & Pere Roca-Cusachs, 2021. "Dynamic mechanochemical feedback between curved membranes and BAR protein self-organization," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    2. Kazuya Tsujita & Reiko Satow & Shinobu Asada & Yoshikazu Nakamura & Luis Arnes & Keisuke Sako & Yasuyuki Fujita & Kiyoko Fukami & Toshiki Itoh, 2021. "Homeostatic membrane tension constrains cancer cell dissemination by counteracting BAR protein assembly," Nature Communications, Nature, vol. 12(1), pages 1-14, December.

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