دورية أكاديمية
CENP-C functions in centromere assembly, the maintenance of CENP-A asymmetry and epigenetic age in Drosophila germline stem cells.
العنوان: | CENP-C functions in centromere assembly, the maintenance of CENP-A asymmetry and epigenetic age in Drosophila germline stem cells. |
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المؤلفون: | Ben L Carty, Anna A Dattoli, Elaine M Dunleavy |
المصدر: | PLoS Genetics, Vol 17, Iss 5, p e1009247 (2021) |
بيانات النشر: | Public Library of Science (PLoS), 2021. |
سنة النشر: | 2021 |
المجموعة: | LCC:Genetics |
مصطلحات موضوعية: | Genetics, QH426-470 |
الوصف: | Germline stem cells divide asymmetrically to produce one new daughter stem cell and one daughter cell that will subsequently undergo meiosis and differentiate to generate the mature gamete. The silent sister hypothesis proposes that in asymmetric divisions, the selective inheritance of sister chromatids carrying specific epigenetic marks between stem and daughter cells impacts cell fate. To facilitate this selective inheritance, the hypothesis specifically proposes that the centromeric region of each sister chromatid is distinct. In Drosophila germ line stem cells (GSCs), it has recently been shown that the centromeric histone CENP-A (called CID in flies)-the epigenetic determinant of centromere identity-is asymmetrically distributed between sister chromatids. In these cells, CID deposition occurs in G2 phase such that sister chromatids destined to end up in the stem cell harbour more CENP-A, assemble more kinetochore proteins and capture more spindle microtubules. These results suggest a potential mechanism of 'mitotic drive' that might bias chromosome segregation. Here we report that the inner kinetochore protein CENP-C, is required for the assembly of CID in G2 phase in GSCs. Moreover, CENP-C is required to maintain a normal asymmetric distribution of CID between stem and daughter cells. In addition, we find that CID is lost from centromeres in aged GSCs and that a reduction in CENP-C accelerates this loss. Finally, we show that CENP-C depletion in GSCs disrupts the balance of stem and daughter cells in the ovary, shifting GSCs toward a self-renewal tendency. Ultimately, we provide evidence that centromere assembly and maintenance via CENP-C is required to sustain asymmetric divisions in female Drosophila GSCs. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1553-7390 1553-7404 |
العلاقة: | https://doaj.org/toc/1553-7390Test; https://doaj.org/toc/1553-7404Test |
DOI: | 10.1371/journal.pgen.1009247 |
الوصول الحر: | https://doaj.org/article/b48b93ee6b984e099fc68be16c91ef82Test |
رقم الانضمام: | edsdoj.b48b93ee6b984e099fc68be16c91ef82 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 15537390 15537404 |
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DOI: | 10.1371/journal.pgen.1009247 |