Journal article 775 views 63 downloads
Transport of solid bodies along tubular membrane tethers
PLOS ONE, Volume: 14, Issue: 1, Start page: e0210259
Swansea University Author:
Rob Daniels
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DOI (Published version): 10.1371/journal.pone.0210259
Abstract
We study the crucial role of membrane fluctuations in maintaining a narrow gap between a fluid membrane tube and an enclosed solid particle. Solvent flows can occur in this gap, hence giving rise to a finite particle mobility along the tube. While our study has relevance for how cells are able to tr...
| Published in: | PLOS ONE |
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| ISSN: | 1932-6203 |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa48060 |
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| Abstract: |
We study the crucial role of membrane fluctuations in maintaining a narrow gap between a fluid membrane tube and an enclosed solid particle. Solvent flows can occur in this gap, hence giving rise to a finite particle mobility along the tube. While our study has relevance for how cells are able to transport large organelles or other cargo along connecting membrane tubes, known as tunneling nanotubes, our calculations are also framed so that they can be tested by a specific in vitro experiment: A tubular membrane tether can be pulled from a membrane reservoir, such as an aspirated Giant Unilamellar Vesicle (GUV), e.g. using a conjugated bead that binds to the membrane and is held in a laser trap. We compute the subsequent mobility of colloidal particles trapped in the tube, focusing on the case when the particle is large compared to the equilibrium tube radius. We predict that the particle mobility should scale as ∼ σ−2/3, with σ the membrane tension. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
1 |
| Start Page: |
e0210259 |