A dynamic population of prophase CENP-C is required for meiotic chromosome segregation.
The centromere is an epigenetic mark that is a loading site for the kinetochore during meiosis and mitosis. This mark is characterized by the H3 variant CENP-A, known as CID in Drosophila. In Drosophila, CENP-C is critical for maintaining CID at the centromeres and directly recruits outer kinetochor...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2023-11-01
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| Series: | PLoS Genetics |
| Online Access: | https://doi.org/10.1371/journal.pgen.1011066 |
| _version_ | 1797377735626063872 |
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| author | Jessica E Fellmeth Janet K Jang Manisha Persaud Hannah Sturm Neha Changela Aashka Parikh Kim S McKim |
| author_facet | Jessica E Fellmeth Janet K Jang Manisha Persaud Hannah Sturm Neha Changela Aashka Parikh Kim S McKim |
| author_sort | Jessica E Fellmeth |
| collection | DOAJ |
| description | The centromere is an epigenetic mark that is a loading site for the kinetochore during meiosis and mitosis. This mark is characterized by the H3 variant CENP-A, known as CID in Drosophila. In Drosophila, CENP-C is critical for maintaining CID at the centromeres and directly recruits outer kinetochore proteins after nuclear envelope break down. These two functions, however, happen at different times in the cell cycle. Furthermore, in Drosophila and many other metazoan oocytes, centromere maintenance and kinetochore assembly are separated by an extended prophase. We have investigated the dynamics of function of CENP-C during the extended meiotic prophase of Drosophila oocytes and found that maintaining high levels of CENP-C for metaphase I requires expression during prophase. In contrast, CID is relatively stable and does not need to be expressed during prophase to remain at high levels in metaphase I of meiosis. Expression of CID during prophase can even be deleterious, causing ectopic localization to non-centromeric chromatin, abnormal meiosis and sterility. CENP-C prophase loading is required for multiple meiotic functions. In early meiotic prophase, CENP-C loading is required for sister centromere cohesion and centromere clustering. In late meiotic prophase, CENP-C loading is required to recruit kinetochore proteins. CENP-C is one of the few proteins identified in which expression during prophase is required for meiotic chromosome segregation. An implication of these results is that the failure to maintain recruitment of CENP-C during the extended prophase in oocytes would result in chromosome segregation errors in oocytes. |
| first_indexed | 2024-03-08T19:56:52Z |
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| id | doaj.art-1e7e3263e7f1401ca9f5eff0ab0ca6f6 |
| institution | Directory Open Access Journal |
| issn | 1553-7390 1553-7404 |
| language | English |
| last_indexed | 2024-03-08T19:56:52Z |
| publishDate | 2023-11-01 |
| publisher | Public Library of Science (PLoS) |
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| series | PLoS Genetics |
| spelling | doaj.art-1e7e3263e7f1401ca9f5eff0ab0ca6f62023-12-24T05:33:06ZengPublic Library of Science (PLoS)PLoS Genetics1553-73901553-74042023-11-011911e101106610.1371/journal.pgen.1011066A dynamic population of prophase CENP-C is required for meiotic chromosome segregation.Jessica E FellmethJanet K JangManisha PersaudHannah SturmNeha ChangelaAashka ParikhKim S McKimThe centromere is an epigenetic mark that is a loading site for the kinetochore during meiosis and mitosis. This mark is characterized by the H3 variant CENP-A, known as CID in Drosophila. In Drosophila, CENP-C is critical for maintaining CID at the centromeres and directly recruits outer kinetochore proteins after nuclear envelope break down. These two functions, however, happen at different times in the cell cycle. Furthermore, in Drosophila and many other metazoan oocytes, centromere maintenance and kinetochore assembly are separated by an extended prophase. We have investigated the dynamics of function of CENP-C during the extended meiotic prophase of Drosophila oocytes and found that maintaining high levels of CENP-C for metaphase I requires expression during prophase. In contrast, CID is relatively stable and does not need to be expressed during prophase to remain at high levels in metaphase I of meiosis. Expression of CID during prophase can even be deleterious, causing ectopic localization to non-centromeric chromatin, abnormal meiosis and sterility. CENP-C prophase loading is required for multiple meiotic functions. In early meiotic prophase, CENP-C loading is required for sister centromere cohesion and centromere clustering. In late meiotic prophase, CENP-C loading is required to recruit kinetochore proteins. CENP-C is one of the few proteins identified in which expression during prophase is required for meiotic chromosome segregation. An implication of these results is that the failure to maintain recruitment of CENP-C during the extended prophase in oocytes would result in chromosome segregation errors in oocytes.https://doi.org/10.1371/journal.pgen.1011066 |
| spellingShingle | Jessica E Fellmeth Janet K Jang Manisha Persaud Hannah Sturm Neha Changela Aashka Parikh Kim S McKim A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. PLoS Genetics |
| title | A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. |
| title_full | A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. |
| title_fullStr | A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. |
| title_full_unstemmed | A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. |
| title_short | A dynamic population of prophase CENP-C is required for meiotic chromosome segregation. |
| title_sort | dynamic population of prophase cenp c is required for meiotic chromosome segregation |
| url | https://doi.org/10.1371/journal.pgen.1011066 |
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