BubR1 localizes to centrosomes and suppresses centrosome amplification via regulating Plk1 activity in interphase cells

H. Izumi, Y. Matsumoto, T. Ikeuchi, H. Saya, T. Kajii, S. Matsuura

研究成果: Article査読

33 被引用数 (Scopus)

抄録

BubR1 is a critical component of the mitotic checkpoint that delays the onset of anaphase until all chromosomes have established bipolar attachment to the microtubules. We previously reported that mutations of the BUB1B gene (encoding BubR1) caused premature chromatid separation (PCS) syndrome, a condition characterized by constitutional aneuploidy and a high risk of childhood cancer. We here report that the cells from PCS syndrome patients have loss of regulation of the centrosome duplication machinery, resulting in centrosome amplification and multipolar mitosis. PCS syndrome cells show increased activity of Polo-like kinase 1 (Plk1), whose knockdown suppresses centrosome amplification. BubR1 localizes to centrosomes, physically interacts with Plk1 and inhibits Plk1 phosphorylation and its kinase activity during interphase. These results unravel a crucial role of BubR1 in preventing centrosome reduplication through negative regulation of Plk1 in interphase cells.

本文言語English
ページ(範囲)2806-2820
ページ数15
ジャーナルOncogene
28
31
DOI
出版ステータスPublished - 06-08-2009
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 遺伝学
  • 癌研究

フィンガープリント

「BubR1 localizes to centrosomes and suppresses centrosome amplification via regulating Plk1 activity in interphase cells」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル