The microtubule catastrophe promoter Sentin delays stable kinetochore-microtubule attachment in oocytes

A Agata Głuszek, C Fiona Cullen, Wenjing Li, Rachel A Battaglia, Sarah J Radford, Mariana F Costa, Kim S McKim, Gohta Goshima, Hiroyuki Ohkura

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The critical step in meiosis is to attach homologous chromosomes to the opposite poles. In mouse oocytes, stable microtubule end-on attachments to kinetochores are not established until hours after spindle assembly, and phosphorylation of kinetochore proteins by Aurora B/C is responsible for the delay. Here we demonstrated that microtubule ends are actively prevented from stable attachment to kinetochores until well after spindle formation in Drosophila melanogaster oocytes. We identified the microtubule catastrophe-promoting complex Sentin-EB1 as a major factor responsible for this delay. Without this activity, microtubule ends precociously form robust attachments to kinetochores in oocytes, leading to a high proportion of homologous kinetochores stably attached to the same pole. Therefore, regulation of microtubule ends provides an alternative novel mechanism to delay stable kinetochore-microtubule attachment in oocytes.

Original languageEnglish
Pages (from-to)1113-20
Number of pages8
JournalJournal of Cell Biology
Volume211
Issue number6
Early online date14 Dec 2015
DOIs
Publication statusPublished - 21 Dec 2015

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