Abstract
How adherent and contractile systems coordinate to promote cell shape changes is unclear. Here, we define a counterbalanced adhesion/contraction model for cell shape control. Live-cell microscopy data showed a crucial role for a contractile meshwork at the top of the cell, which is composed of actin arcs and myosin IIA filaments. The contractile actin meshwork is organized like muscle sarcomeres, with repeating myosin II filaments separated by the actin bundling protein α-actinin, and is mechanically coupled to noncontractile dorsal actin fibers that run from top to bottom in the cell. When the meshwork contracts, it pulls the dorsal fibers away from the substrate. This pulling force is counterbalanced by the dorsal fibers’ attachment to focal adhesions, causing the fibers to bend downward and flattening the cell. This model is likely to be relevant for understanding how cells configure themselves to complex surfaces, protrude into tight spaces, and generate three-dimensional forces on the growth substrate under both healthy and diseased conditions.
Bibliography
Burnette, D. T., Shao, L., Ott, C., Pasapera, A. M., Fischer, R. S., Baird, M. A., Der Loughian, C., Delanoe-Ayari, H., Paszek, M. J., Davidson, M. W., Betzig, E., & Lippincott-Schwartz, J. (2014). A contractile and counterbalancing adhesion system controls the 3D shape of crawling cells. Journal of Cell Biology, 205(1), 83â96.
Authors
12
- Dylan T. Burnette (first)
- Lin Shao (additional)
- Carolyn Ott (additional)
- Ana M. Pasapera (additional)
- Robert S. Fischer (additional)
- Michelle A. Baird (additional)
- Christelle Der Loughian (additional)
- Helene Delanoe-Ayari (additional)
- Matthew J. Paszek (additional)
- Michael W. Davidson (additional)
- Eric Betzig (additional)
- Jennifer Lippincott-Schwartz (additional)
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Dates
Type | When |
---|---|
Created | 11 years, 4 months ago (April 8, 2014, 1:54 a.m.) |
Deposited | 2 years, 1 month ago (July 23, 2023, 2:35 a.m.) |
Indexed | 1 week, 2 days ago (Aug. 21, 2025, 1:02 p.m.) |
Issued | 11 years, 4 months ago (April 7, 2014) |
Published | 11 years, 4 months ago (April 7, 2014) |
Published Online | 11 years, 4 months ago (April 7, 2014) |
Published Print | 11 years, 4 months ago (April 14, 2014) |
@article{Burnette_2014, title={A contractile and counterbalancing adhesion system controls the 3D shape of crawling cells}, volume={205}, ISSN={0021-9525}, url={http://dx.doi.org/10.1083/jcb.201311104}, DOI={10.1083/jcb.201311104}, number={1}, journal={Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Burnette, Dylan T. and Shao, Lin and Ott, Carolyn and Pasapera, Ana M. and Fischer, Robert S. and Baird, Michelle A. and Der Loughian, Christelle and Delanoe-Ayari, Helene and Paszek, Matthew J. and Davidson, Michael W. and Betzig, Eric and Lippincott-Schwartz, Jennifer}, year={2014}, month=apr, pages={83–96} }