| Autor: |
Masashi Nambu, Atsuki Kishikawa, Takatomi Yamada, Kento Ichikawa, Yunosuke Kira, Yuta Itabashi, Akira Honda, Kohei Yamada, Hiroshi Murakami, Ayumu Yamamoto |
| Předmět: |
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| Zdroj: |
Journal of Cell Science; Jan2023, Vol. 136 Issue 2, p1-13, 13p |
| Abstrakt: |
Kinetochores drive chromosome segregation by mediating chromosome interactions with the spindle. In higher eukaryotes, sister kinetochores are separately positioned on opposite sides of sister centromeres during mitosis, but associate with each other during meiosis I. Kinetochore association facilitates the attachment of sister chromatids to the same pole, enabling the segregation of homologous chromosomes toward opposite poles. In the fission yeast, Schizosaccharomyces pombe, Rec8-containing meiotic cohesin is suggested to establish kinetochore associations by mediating cohesion of the centromere cores. However, cohesinmediated kinetochore associations on intact chromosomes have never been demonstrated directly. In the present study, we describe a novel method for the direct evaluation of kinetochore associations on intact chromosomes in live S. pombe cells, and demonstrate that sister kinetochores and the centromere cores are positioned separately on mitotic chromosomes but associate with each other on meiosis I chromosomes. Furthermore, we demonstrate that kinetochore association depends on meiotic cohesin and the cohesin regulators Moa1 and Mrc1, and requires mating-pheromone signaling for its establishment. These results confirm cohesinmediated kinetochore association and its regulatory mechanisms, along with the usefulness of the developed method for its analysis. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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