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A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint

Recruitment of Mad1–Mad2 complexes to unattached kinetochores is a central event in spindle checkpoint signaling. Despite its importance, the mechanism that recruits Mad1–Mad2 to kinetochores is unclear. In this paper, we show that MAD-1 interacts with BUB-1 in Caenorhabditis elegans. Mutagenesis id...

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Autores principales: Moyle, Mark W., Kim, Taekyung, Hattersley, Neil, Espeut, Julien, Cheerambathur, Dhanya K., Oegema, Karen, Desai, Arshad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Rockefeller University Press 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3941058/
https://www.ncbi.nlm.nih.gov/pubmed/24567362
http://dx.doi.org/10.1083/jcb.201311015
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author Moyle, Mark W.
Kim, Taekyung
Hattersley, Neil
Espeut, Julien
Cheerambathur, Dhanya K.
Oegema, Karen
Desai, Arshad
author_facet Moyle, Mark W.
Kim, Taekyung
Hattersley, Neil
Espeut, Julien
Cheerambathur, Dhanya K.
Oegema, Karen
Desai, Arshad
author_sort Moyle, Mark W.
collection PubMed
description Recruitment of Mad1–Mad2 complexes to unattached kinetochores is a central event in spindle checkpoint signaling. Despite its importance, the mechanism that recruits Mad1–Mad2 to kinetochores is unclear. In this paper, we show that MAD-1 interacts with BUB-1 in Caenorhabditis elegans. Mutagenesis identified specific residues in a segment of the MAD-1 coiled coil that mediate the BUB-1 interaction. In addition to unattached kinetochores, MAD-1 localized between separating meiotic chromosomes and to the nuclear periphery. Mutations in the MAD-1 coiled coil that selectively disrupt interaction with BUB-1 eliminated MAD-1 localization to unattached kinetochores and between meiotic chromosomes, both of which require BUB-1, and abrogated checkpoint signaling. The identified MAD-1 coiled-coil segment interacted with a C-terminal region of BUB-1 that contains its kinase domain, and mutations in this region prevented MAD-1 kinetochore targeting independently of kinase activity. These results delineate an interaction between BUB-1 and MAD-1 that targets MAD-1–MAD-2 complexes to kinetochores and is essential for spindle checkpoint signaling.
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spelling pubmed-39410582014-09-03 A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint Moyle, Mark W. Kim, Taekyung Hattersley, Neil Espeut, Julien Cheerambathur, Dhanya K. Oegema, Karen Desai, Arshad J Cell Biol Research Articles Recruitment of Mad1–Mad2 complexes to unattached kinetochores is a central event in spindle checkpoint signaling. Despite its importance, the mechanism that recruits Mad1–Mad2 to kinetochores is unclear. In this paper, we show that MAD-1 interacts with BUB-1 in Caenorhabditis elegans. Mutagenesis identified specific residues in a segment of the MAD-1 coiled coil that mediate the BUB-1 interaction. In addition to unattached kinetochores, MAD-1 localized between separating meiotic chromosomes and to the nuclear periphery. Mutations in the MAD-1 coiled coil that selectively disrupt interaction with BUB-1 eliminated MAD-1 localization to unattached kinetochores and between meiotic chromosomes, both of which require BUB-1, and abrogated checkpoint signaling. The identified MAD-1 coiled-coil segment interacted with a C-terminal region of BUB-1 that contains its kinase domain, and mutations in this region prevented MAD-1 kinetochore targeting independently of kinase activity. These results delineate an interaction between BUB-1 and MAD-1 that targets MAD-1–MAD-2 complexes to kinetochores and is essential for spindle checkpoint signaling. The Rockefeller University Press 2014-03-03 /pmc/articles/PMC3941058/ /pubmed/24567362 http://dx.doi.org/10.1083/jcb.201311015 Text en © 2014 Moyle et al. This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 3.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/3.0/).
spellingShingle Research Articles
Moyle, Mark W.
Kim, Taekyung
Hattersley, Neil
Espeut, Julien
Cheerambathur, Dhanya K.
Oegema, Karen
Desai, Arshad
A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title_full A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title_fullStr A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title_full_unstemmed A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title_short A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
title_sort bub1–mad1 interaction targets the mad1–mad2 complex to unattached kinetochores to initiate the spindle checkpoint
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3941058/
https://www.ncbi.nlm.nih.gov/pubmed/24567362
http://dx.doi.org/10.1083/jcb.201311015
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