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Article Dans Une Revue Current Biology - CB Année : 2019

Simultaneous regulation of cytokinetic furrow and nucleus positions by cortical tension contributes to proper DNA segregation during late mitosis

Anne Pacquelet
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Matthieu Jousseaume
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Grégoire Michaux

Résumé

Coordinating mitotic spindle and cytokinetic furrow positioning is essential to ensure proper DNA segregation. Here we present a novel mechanism, which corrects DNA segregation defects due to cytokinetic furrow mispositioningduring the first division ofC. elegansembryos. Correction of DNA segregation defects due to an abnormally anterior cytokinetic furrow relies on the concomitant and opposite displacementsof the furrow and of the anterior nucleus,towards the posterior and anterior polesof the embryo, respectively. It also coincides with cortical blebbing and an anteriorly directed cytoplasmic flow. While microtubules contribute to nuclear displacement, relaxation of an excessive tension at the anterior cortex plays a central role in the correction process and simultaneously regulates cytoplasmic flow as well as nuclear and furrow displacements. This work thus reveals the existence of a so far uncharacterized correction mechanism, which is critical to correct DNA segregation defects due to cytokinetic furrow mispositi
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Dates et versions

hal-03000526 , version 1 (21-12-2020)

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Anne Pacquelet, Matthieu Jousseaume, Jocelyn Etienne, Grégoire Michaux. Simultaneous regulation of cytokinetic furrow and nucleus positions by cortical tension contributes to proper DNA segregation during late mitosis. Current Biology - CB, 2019, 29 (22), pp.3766-3777.e4. ⟨10.1016/j.cub.2019.09.013⟩. ⟨hal-03000526⟩

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