A Taz1- and Microtubule-Dependent Regulatory Relationship between Telomere and Centromere Positions in Bouquet Formation Secures Proper Meiotic Divisions.
During meiotic prophase, telomeres cluster, forming the bouquet chromosome arrangement, and facilitate homologous chromosome pairing. In fission yeast, bouquet formation requires switching of telomere and centromere positions. Centromeres are located at the spindle pole body (SPB) during mitotic interphase, and upon entering meiosis, telomeres cluster at the SPB, followed by centromere detachment from the SPB. Telomere clustering depends on the formation of the microtubule-organizing center at telomeres by the linker of nucleoskeleton and cytoskeleton complex (LINC), while centromere detachment depends on disassembly of kinetochores, which induces meiotic centromere formation. However, how the switching of telomere and centromere positions occurs during bouquet formation is not fully understood. Here, we show that, when impaired telomere interaction with the LINC or microtubule disruption inhibited telomere clustering, kinetochore disassembly-dependent centromere detachment and accompanying meiotic centromere formation were also inhibited. Efficient centromere detachment required telomere clustering-dependent SPB recruitment of a conserved telomere component, Taz1, and microtubules. Furthermore, when artificial SPB recruitment of Taz1 induced centromere detachment in telomere clustering-defective cells, spindle formation was impaired. Thus, detachment of centromeres from the SPB without telomere clustering causes spindle impairment. These findings establish novel regulatory mechanisms, which prevent concurrent detachment of telomeres and centromeres from the SPB during bouquet formation and secure proper meiotic divisions.
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Kazuhiro
K
Katsumata
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Ami
A
Hirayasu
Faculty of Science, Shizuoka University, Shizuoka, Japan.
Junpei
J
Miyoshi
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Eriko
E
Nishi
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Kento
K
Ichikawa
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Kazuki
K
Tateho
Faculty of Science, Shizuoka University, Shizuoka, Japan.
Airi
A
Wakuda
Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan.
Hirotada
H
Matsuhara
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.|Faculty of Science, Shizuoka University, Shizuoka, Japan.|Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan.
Ayumu
A
Yamamoto
D002503:Centromere / Q000235:genetics*; D011418:Prophase; D011485:Protein Binding; D012568:Schizosaccharomyces / Q000235:genetics; D029702:Schizosaccharomyces pombe Proteins / Q000235:genetics / Q000378:metabolism*; D064048:Spindle Pole Bodies / Q000235:genetics / Q000378:metabolism*; D016615:Telomere / Q000235:genetics*; D034501:Telomere-Binding Proteins / Q000235:genetics / Q000378:metabolism*
D029702:Schizosaccharomyces pombe Proteins; D034501:Telomere-Binding Proteins; C104344:taz1 protein, S pombe