Chromatin-induced spindle assembly plays an important role inmetaphase congression of silkworm holocentric chromosomes

Hiroaki Mon, Jae Man Lee, Kazuei Mita, Marian R. Goldsmith, Takahiro Kusakabe

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

The kinetochore plays important roles in cell cycle progression. Interactions between chromosomes and spindle microtubules allow chromosomes to congress to the middle of the cell and to segregate the sister chromatids into daughter cells in mitosis. The chromosome passenger complex (CPC), composed of the Aurora B kinase and its regulatory subunits INCENP, Survivin, and Borealin, plays multiple roles in these chromosomal events. In the genome of the silkworm, Bombyx mori, which has holocentric chromosomes, the CPC components and their molecular interactions were highly conserved. In contrast to monocentric species, however, the silkworm CPC co-localized with the chromatin-driven spindles on the upper side of prometaphase chromosomes without forming bipolar mitotic spindles. Depletion of the CPC by RNAi arrested the cell cycle progression at prometaphase and disrupted the microtubule network of the chromatin-driven spindles. Interestingly, depletion of mitotic centromere-associated kinesin (MCAK) recovered formation of the microtubule network but did not overcome the cell cycle arrest at prometaphase. These results suggest that the CPC modulates the chromatin-induced spindle assembly and metaphase congression of silkworm holocentric chromosomes.

本文言語英語
ページ(範囲)40-50
ページ数11
ジャーナルInsect Biochemistry and Molecular Biology
45
1
DOI
出版ステータス出版済み - 2 2014

All Science Journal Classification (ASJC) codes

  • 生化学
  • 分子生物学
  • 昆虫科学

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