Cited by 349Microtubule and mitosis dynamicsCellular transport and secretionCellular Mechanics and Interactions

Tug-of-war between dissimilar teams of microtubule motors regulates transport and fission of endosomes

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Soppina, Virupakshi, Rai, Arpan Kumar, Ramaiya, Avin Jayesh, Barak, Pradeep, Mallik, Roop·2009·Proceedings of the National Academy of Sciences

Abstract

Intracellular transport is interspersed with frequent reversals in direction due to the presence of opposing kinesin and dynein motors on organelles that are carried as cargo. The cause and the mechanism of reversals are unknown, but are a key to understanding how cargos are delivered in a regulated manner to specific cellular locations. Unlike established single-motor biophysical assays, this problem requires understanding of the cooperative behavior of multiple interacting motors. Here we present measurements inside live Dictyostelium cells, in a cell extract and with purified motors to quantify such an ensemble function of motors. We show through precise motion analysis that reversals during endosome motion are caused by a tug-of-war between kinesin and dynein. Further, we use a combination of optical trap-based force measurements and Monte Carlo simulations to make the surprising discovery that endosome transport uses many (approximately four to eight) weak and detachment-prone dyneins in a tug-of-war against a single strong and tenacious kinesin. We elucidate how this clever choice of dissimilar motors and motor teams achieves net transport together with endosome fission, both of which are important in controlling the balance of endocytic sorting. To the best of our knowledge, this is a unique demonstration that dynein and kinesin function differently at the molecular level inside cells and of how this difference is used in a specific cellular process, namely endosome biogenesis. Our work may provide a platform to understand intracellular transport of a variety of organelles in terms of measurable quantities.

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  1. [36]Mallik R, Gross SP. Molecular motors: Strategies to get along. Curr Biol. 2004;14:R971–R982. doi: 10.1016/j.cub.2004.10.046. [DOI] [PubMed] [Google Scholar] · DOI

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Authors
Soppina, V., Rai, A. K., Ramaiya, A. J., Barak, P., & Mallik, R.
Affiliations
Tata Institute of Fundamental Research (IN)
Venue
Proceedings of the National Academy of Sciences
Published
2009-11-17
Volume
106
Issue
46
Pages
19381-19386
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2033859483
Cited by
349
References
38
Citations by year
2026: 4 · 2025: 9 · 2024: 7 · 2023: 21 · 2022: 14 · 2021: 18 · 2020: 23 · 2019: 19 · 2018: 17 · 2017: 26 · 2016: 27 · 2015: 18 · 2014: 30 · 2013: 29 · 2012: 33
FWCI
12.90
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust (WT079214MA)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
microtubule motor proteins, kinesin, dynein, intracellular transport, tug-of-war, Dictyostelium, optical trapping, Monte Carlo simulation, endocytic sorting
MeSH terms
Dictyostelium, Dyneins, Microspheres, Microtubules, Monte Carlo Method, Endosomes, Kinesins

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