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A spindle-independent cleavage furrow positioning pathway

机译:不依赖于纺锤的分裂沟定位途径

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摘要

The mitotic spindle determines the cleavage furrow site during metazoan cell division, but whether other mechanisms exist remains unknown. Here we identify a spindle-independent mechanism for cleavage furrow positioning in Drosophila neuroblasts. We show that early and late furrow proteins (Pavarotti, Anillin, and Myosin) are localized to the neuroblast basal cortex at anaphase onset by a Pins cortical polarity pathway, and can induce a basally displaced furrow even in the complete absence of a mitotic spindle. Rotation or displacement of the spindle results in two furrows: an early polarity-induced basal furrow and a later spindle-induced furrow. This spindle-independent cleavage furrow mechanism may be relevant to other highly polarized mitotic cells, such as mammalian neural progenitors.
机译:有丝分裂纺锤体确定后生细胞分裂过程中的裂沟位点,但尚不存在其他机制。在这里,我们确定果蝇神经母细胞分裂沟定位的主轴独立机制。我们显示,早期和晚期犁沟蛋白(Pavarotti,Anillin和Myosin)在后期通过Pins皮质极性途径开始定位于成神经细胞基底皮层,甚至在完全没有有丝分裂纺锤体的情况下也可以诱导基底移位的犁沟。纺锤体的旋转或移位会导致两个犁沟:早期的极性诱导的基沟和后来的纺锤诱导的沟。这种与纺锤无关的分裂犁沟机制可能与其他高度极化的有丝分裂细胞有关,例如哺乳动物的神经祖细胞。

著录项

  • 来源
    《Nature》 |2010年第7311期|P.91-94|共4页
  • 作者单位

    Howard Hughes Medical Institute, University of Oregon, Eugene, Oregon 97403, USA Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403, USA Institute of Neuroscience, University of Oregon, Eugene, Oregon 97403, USA;

    rnInstitute of Molecular Biology, University of Oregon, Eugene, Oregon 97403, USA;

    rnHoward Hughes Medical Institute, University of Oregon, Eugene, Oregon 97403, USA Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403, USA Institute of Neuroscience, University of Oregon, Eugene, Oregon 97403, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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