Synergistic role of fission yeast Alp16GCP6 and Mzt1MOZART1 in γ-tubulin complex recruitment to mitotic spindle pole bodies and spindle assembly
Molecular Biology of the Cell 27 巻 11 号
1753-1763 頁
2016-06-01 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Synergistic role of fission yeast Alp16GCP6 and Mzt1MOZART1 in γ-tubulin complex recruitment to mitotic spindle pole bodies and spindle assembly
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| 作成者 |
Masuda Hirohisa
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| 収録物名 |
Molecular Biology of the Cell
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| 巻 | 27 |
| 号 | 11 |
| 開始ページ | 1753 |
| 終了ページ | 1763 |
| 抄録 |
In fission yeast, γ-tubulin ring complex (γTuRC)–specific components Gfh1GCP4, Mod21GCP5, and Alp16GCP6 are nonessential for cell growth. Of these deletion mutants, only alp16Δ shows synthetic lethality with temperature-sensitive mutants of Mzt1MOZART1, a component of the γTuRC required for recruitment of the complex to microtubule-organizing centers. γ-Tubulin small complex levels at mitotic spindle pole bodies (SPBs, the centrosome equivalent in fungi) and microtubule levels for preanaphase spindles are significantly reduced in alp16Δ cells but not in gfh1Δ or mod21Δ cells. Furthermore, alp16Δ cells often form monopolar spindles and frequently lose a minichromosome when the spindle assembly checkpoint is inactivated. Alp16GCP6 promotes Mzt1-dependent γTuRC recruitment to mitotic SPBs and enhances spindle microtubule assembly in a manner dependent on its expression levels. Gfh1GCP4 and Mod21GCP5 are not required for Alp16GCP6-dependent γTuRC recruitment. Mzt1 has an additional role in the activation of the γTuRC for spindle microtubule assembly. The ratio of Mzt1 to γTuRC levels for preanaphase spindles is higher than at other stages of the cell cycle. Mzt1 overproduction enhances spindle microtubule assembly without affecting γTuRC levels at mitotic SPBs. We propose that Alp16GCP6 and Mzt1 act synergistically for efficient bipolar spindle assembly to ensure faithful chromosome segregation.
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| 内容記述 |
This work was supported by Cancer Research UK, the Francis Crick Institute, Hiroshima University, and the Japan Society for the Promotion of Science KAKENHI Scientific Research (A) (16H02503) and Challenging Exploratory Research (16K14672) (T.T.).
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
The American Society for Cell Biology
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| 発行日 | 2016-06-01 |
| 権利情報 |
© 2016 Masuda and Toda. This article is distributed by The American Society for Cell Biology under license from the author(s). Two months after publication it is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc -sa/3.0).
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1059-1524
[ISSN] 1939-4586
[DOI] 10.1091/mbc.E15-08-0577
[PMID] 27053664
[DOI] https://doi.org/10.1091/mbc.e15-08-0577
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