Aurora B controls kinetochore-microtubule attachments by inhibiting Ska complex-KMN network interaction

Chan, Ying Wai and Jeyaprakash, A. Arockia and Nigg, Erich A. and Santamaria, Anna. (2012) Aurora B controls kinetochore-microtubule attachments by inhibiting Ska complex-KMN network interaction. Journal of Cell Biology, 196 (5). pp. 563-571.

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Official URL: http://edoc.unibas.ch/47336/

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The KMN network (named according to the acronym for KNL1, Mis12, and Ndc80) and the more recently identified Ska complex (Ska1-3) have been shown to mediate kinetochore (KT)-microtubule (MT) attachments. How these two complexes cooperate to achieve stable end-on attachments remains unknown. In this paper, we show that Aurora B negatively regulates the localization of the Ska complex to KTs and that recruitment of the Ska complex to KTs depends on the KMN network. We identified interactions between members of the KMN and Ska complexes and demonstrated that these interactions are regulated by Aurora B. Aurora B directly phosphorylated Ska1 and Ska3 in vitro, and expression of phosphomimetic mutants of Ska1 and Ska3 impaired Ska KT recruitment and formation of stable KT-MT fibers (K-fibers), disrupting mitotic progression. We propose that Aurora B phosphorylation antagonizes the interaction between the Ska complex and the KMN network, thereby controlling Ska recruitment to KTs and stabilization of KT-MT attachments.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Cell Biology (Nigg)
UniBasel Contributors:Nigg, Erich A.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Rockefeller University Press
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Dec 2021 14:42
Deposited On:13 Dec 2021 14:42

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