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Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules
The initial kinetochore (KT) encounter with a spindle microtubule (MT; KT capture) is one of the rate-limiting steps in establishing proper KT–MT interaction during mitosis. KT capture is facilitated by multiple factors, such as MT extension in various directions, KT diffusion, and MT pivoting. In a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Rockefeller University Press
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5461016/ https://www.ncbi.nlm.nih.gov/pubmed/28446512 http://dx.doi.org/10.1083/jcb.201608122 |
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author | Vasileva, Vanya Gierlinski, Marek Yue, Zuojun O’Reilly, Nicola Kitamura, Etsushi Tanaka, Tomoyuki U. |
author_facet | Vasileva, Vanya Gierlinski, Marek Yue, Zuojun O’Reilly, Nicola Kitamura, Etsushi Tanaka, Tomoyuki U. |
author_sort | Vasileva, Vanya |
collection | PubMed |
description | The initial kinetochore (KT) encounter with a spindle microtubule (MT; KT capture) is one of the rate-limiting steps in establishing proper KT–MT interaction during mitosis. KT capture is facilitated by multiple factors, such as MT extension in various directions, KT diffusion, and MT pivoting. In addition, KTs generate short MTs, which subsequently interact with a spindle MT. KT-derived MTs may facilitate KT capture, but their contribution is elusive. In this study, we find that Stu1 recruits Stu2 to budding yeast KTs, which promotes MT generation there. By removing Stu2 specifically from KTs, we show that KT-derived MTs shorten the half-life of noncaptured KTs from 48–49 s to 28–34 s. Using computational simulation, we found that multiple factors facilitate KT capture redundantly or synergistically. In particular, KT-derived MTs play important roles both by making a significant contribution on their own and by synergistically enhancing the effects of KT diffusion and MT pivoting. Our study reveals fundamental mechanisms facilitating the initial KT encounter with spindle MTs. |
format | Online Article Text |
id | pubmed-5461016 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-54610162017-06-07 Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules Vasileva, Vanya Gierlinski, Marek Yue, Zuojun O’Reilly, Nicola Kitamura, Etsushi Tanaka, Tomoyuki U. J Cell Biol Research Articles The initial kinetochore (KT) encounter with a spindle microtubule (MT; KT capture) is one of the rate-limiting steps in establishing proper KT–MT interaction during mitosis. KT capture is facilitated by multiple factors, such as MT extension in various directions, KT diffusion, and MT pivoting. In addition, KTs generate short MTs, which subsequently interact with a spindle MT. KT-derived MTs may facilitate KT capture, but their contribution is elusive. In this study, we find that Stu1 recruits Stu2 to budding yeast KTs, which promotes MT generation there. By removing Stu2 specifically from KTs, we show that KT-derived MTs shorten the half-life of noncaptured KTs from 48–49 s to 28–34 s. Using computational simulation, we found that multiple factors facilitate KT capture redundantly or synergistically. In particular, KT-derived MTs play important roles both by making a significant contribution on their own and by synergistically enhancing the effects of KT diffusion and MT pivoting. Our study reveals fundamental mechanisms facilitating the initial KT encounter with spindle MTs. The Rockefeller University Press 2017-06-05 /pmc/articles/PMC5461016/ /pubmed/28446512 http://dx.doi.org/10.1083/jcb.201608122 Text en © 2017 Vasileva et al. https://creativecommons.org/licenses/by/4.0/This article is available under a Creative Commons License (Attribution 4.0 International, as described at https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Research Articles Vasileva, Vanya Gierlinski, Marek Yue, Zuojun O’Reilly, Nicola Kitamura, Etsushi Tanaka, Tomoyuki U. Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title | Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title_full | Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title_fullStr | Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title_full_unstemmed | Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title_short | Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
title_sort | molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5461016/ https://www.ncbi.nlm.nih.gov/pubmed/28446512 http://dx.doi.org/10.1083/jcb.201608122 |
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