Reconstitution of dynamic microtubules with drosophila XMAP215, EB1, and sentin

Wenjing Li, Takashi Moriwaki, Tomomi Tani, Takashi Watanabe, Kozo Kaibuchi, Gohta Goshima

研究成果: ジャーナルへの寄稿学術論文査読

45 被引用数 (Scopus)

抄録

Dynamic microtubules (MTs) are essential for various intracellular events, such as mitosis. In Drosophila melanogaster S2 cells, three MT tip-localizing proteins, Msps/XMAP215, EB1, and Sentin (an EB1 cargo protein), have been identified as being critical for accelerating MT growth and promoting catastrophe events, thus resulting in the formation of dynamic MTs. However, the molecular activity ofeach protein and the basis of the modulation of MT dynamics by these three factors are unknown. In this paper, we showed in vitro that XMAP215msps had a potent growth-promoting activity at a wide range of tubulin concentrations, whereas Sentin, when recruited by EB1 to the growing MT tip, accelerated growth and also increased catastrophe frequency. When all three factors were combined, the growth ratewas synergistically enhanced, and rescue events were observed most frequently, but frequent catastrophes restrained the lengthening of the MTs. We propose that MT dynamics are promoted by the independent as well as the cooperative action of XMAP215msps polymerase and the EB1-Sentin duo.

本文言語英語
ページ(範囲)849-862
ページ数14
ジャーナルJournal of Cell Biology
199
5
DOI
出版ステータス出版済み - 11-2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • 細胞生物学

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