| Title: | Direct evaluation of cohesin-mediated sister kinetochore associations at meiosis I in fission yeast |
| Author(s): | Nambu M; Kishikawa A; Yamada T; Ichikawa K; Kira Y; Itabashi Y; Honda A; Yamada K; Murakami H; Yamamoto A; |
| Address: | "Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan. Department of Biological Sciences, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan. Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan" |
| ISSN/ISBN: | 1477-9137 (Electronic) 0021-9533 (Linking) |
| Abstract: | "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, cohesin-mediated 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 cohesin-mediated kinetochore association and its regulatory mechanisms, along with the usefulness of the developed method for its analysis. This article has an associated First Person interview with the first author of the paper" |
| Keywords: | "Cell Cycle Proteins/genetics Centromere Chromosomal Proteins, Non-Histone Chromosome Segregation/genetics Humans Kinetochores Meiosis Phosphoproteins/genetics *Schizosaccharomyces/genetics *Schizosaccharomyces pombe Proteins/genetics Cohesin Fission yeast;" |
| Notes: | "MedlineNambu, Masashi Kishikawa, Atsuki Yamada, Takatomi Ichikawa, Kento Kira, Yunosuke Itabashi, Yuta Honda, Akira Yamada, Kohei Murakami, Hiroshi Yamamoto, Ayumu eng Research Support, Non-U.S. Gov't England 2021/12/02 J Cell Sci. 2022 Jan 1; 135(1):jcs259102. doi: 10.1242/jcs.259102. Epub 2022 Jan 10" |
