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Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion
During C. elegans oocyte meiosis I cytokinesis and polar body extrusion, cortical actomyosin is locally remodeled to assemble a contractile ring that forms within and remains part of a much larger and actively contractile cortical actomyosin network. This network both mediates contractile ring dynam...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569601/ https://www.ncbi.nlm.nih.gov/pubmed/37782660 http://dx.doi.org/10.1371/journal.pgen.1010984 |
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author | Quiogue, Alyssa R. Sumiyoshi, Eisuke Fries, Adam Chuang, Chien-Hui Bowerman, Bruce |
author_facet | Quiogue, Alyssa R. Sumiyoshi, Eisuke Fries, Adam Chuang, Chien-Hui Bowerman, Bruce |
author_sort | Quiogue, Alyssa R. |
collection | PubMed |
description | During C. elegans oocyte meiosis I cytokinesis and polar body extrusion, cortical actomyosin is locally remodeled to assemble a contractile ring that forms within and remains part of a much larger and actively contractile cortical actomyosin network. This network both mediates contractile ring dynamics and generates shallow ingressions throughout the oocyte cortex during polar body extrusion. Based on our analysis of requirements for CLS-2, a member of the CLASP family of proteins that stabilize microtubules, we recently proposed that a balance of actomyosin-mediated tension and microtubule-mediated stiffness limits membrane ingression throughout the oocyte during meiosis I polar body extrusion. Here, using live cell imaging and fluorescent protein fusions, we show that CLS-2 is part of a group of kinetochore proteins, including the scaffold KNL-1 and the kinase BUB-1, that also co-localize during meiosis I to structures called linear elements, which are present within the assembling oocyte spindle and also are distributed throughout the oocyte in proximity to, but appearing to underlie, the actomyosin cortex. We further show that KNL-1 and BUB-1, like CLS-2, promote the proper organization of sub-cortical microtubules and also limit membrane ingression throughout the oocyte. Moreover, nocodazole or taxol treatment to destabilize or stabilize oocyte microtubules leads to, respectively, excess or decreased membrane ingression throughout the oocyte. Furthermore, taxol treatment, and genetic backgrounds that elevate the levels of cortically associated microtubules, both suppress excess membrane ingression in cls-2 mutant oocytes. We propose that linear elements influence the organization of sub-cortical microtubules to generate a stiffness that limits cortical actomyosin-driven membrane ingression throughout the oocyte during meiosis I polar body extrusion. We discuss the possibility that this regulation of sub-cortical microtubule dynamics facilitates actomyosin contractile ring dynamics during C. elegans oocyte meiosis I cell division. |
format | Online Article Text |
id | pubmed-10569601 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-105696012023-10-13 Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion Quiogue, Alyssa R. Sumiyoshi, Eisuke Fries, Adam Chuang, Chien-Hui Bowerman, Bruce PLoS Genet Research Article During C. elegans oocyte meiosis I cytokinesis and polar body extrusion, cortical actomyosin is locally remodeled to assemble a contractile ring that forms within and remains part of a much larger and actively contractile cortical actomyosin network. This network both mediates contractile ring dynamics and generates shallow ingressions throughout the oocyte cortex during polar body extrusion. Based on our analysis of requirements for CLS-2, a member of the CLASP family of proteins that stabilize microtubules, we recently proposed that a balance of actomyosin-mediated tension and microtubule-mediated stiffness limits membrane ingression throughout the oocyte during meiosis I polar body extrusion. Here, using live cell imaging and fluorescent protein fusions, we show that CLS-2 is part of a group of kinetochore proteins, including the scaffold KNL-1 and the kinase BUB-1, that also co-localize during meiosis I to structures called linear elements, which are present within the assembling oocyte spindle and also are distributed throughout the oocyte in proximity to, but appearing to underlie, the actomyosin cortex. We further show that KNL-1 and BUB-1, like CLS-2, promote the proper organization of sub-cortical microtubules and also limit membrane ingression throughout the oocyte. Moreover, nocodazole or taxol treatment to destabilize or stabilize oocyte microtubules leads to, respectively, excess or decreased membrane ingression throughout the oocyte. Furthermore, taxol treatment, and genetic backgrounds that elevate the levels of cortically associated microtubules, both suppress excess membrane ingression in cls-2 mutant oocytes. We propose that linear elements influence the organization of sub-cortical microtubules to generate a stiffness that limits cortical actomyosin-driven membrane ingression throughout the oocyte during meiosis I polar body extrusion. We discuss the possibility that this regulation of sub-cortical microtubule dynamics facilitates actomyosin contractile ring dynamics during C. elegans oocyte meiosis I cell division. Public Library of Science 2023-10-02 /pmc/articles/PMC10569601/ /pubmed/37782660 http://dx.doi.org/10.1371/journal.pgen.1010984 Text en © 2023 Quiogue et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Quiogue, Alyssa R. Sumiyoshi, Eisuke Fries, Adam Chuang, Chien-Hui Bowerman, Bruce Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title | Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title_full | Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title_fullStr | Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title_full_unstemmed | Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title_short | Microtubules oppose cortical actomyosin-driven membrane ingression during C. elegans meiosis I polar body extrusion |
title_sort | microtubules oppose cortical actomyosin-driven membrane ingression during c. elegans meiosis i polar body extrusion |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569601/ https://www.ncbi.nlm.nih.gov/pubmed/37782660 http://dx.doi.org/10.1371/journal.pgen.1010984 |
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