Remote control of microtubule plus-end dynamics and function from the minus-end
- ETH Zürich, Switzerland
- SIB Swiss Institute of Bioinformatics and ETH Zürich, Switzerland
- Paul Scherrer Institut, Switzerland
Abstract
In eukaryotes, the organization and function of the microtubule cytoskeleton depend on the allocation of different roles to individual microtubules. For example, many asymmetrically dividing cells differentially specify microtubule behavior at old and new centrosomes. Here we show that yeast spindle pole bodies (SPBs, yeast centrosomes) differentially control the plus-end dynamics and cargoes of their astral microtubules, remotely from the minus-end. The old SPB recruits the kinesin motor protein Kip2, which then translocates to the plus-end of the emanating microtubules, promotes their extension and delivers dynein into the bud. Kip2 recruitment at the SPB depends on Bub2 and Bfa1, and phosphorylation of cytoplasmic Kip2 prevents random lattice binding. Releasing Kip2 of its control by SPBs equalizes its distribution, the length of microtubules and dynein distribution between the mother cell and its bud. These observations reveal that microtubule organizing centers use minus to plus-end directed remote control to individualize microtubule function.
Data availability
All data and code are available in the main text, the supplementary materials, or at https://gitlab.com/csb.ethz/Kip2-SPB-Profile-Manuscript.
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Author details
Funding
SystemsX.ch (RTD Grant #2012/192 TubeX)
- Michel O Steinmetz
- Jörg Stelling
- Yves Barral
Swiss National Science Fundation (31003A-105904)
- Yves Barral
Swiss National Science Fundation (31003A_166608)
- Michel O Steinmetz
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2019, Chen 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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Remote control of microtubule plus-end dynamics and function from the minus-end
eLife 8:e48627.
https://doi.org/10.7554/eLife.48627
