Aurora B kinase cooperates with CENP-E to promote timely anaphase onset

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Maia, AF (Author) Other; Feijao, T (Author) Other; Vromans, MJM (Author) Other; Sunkel, CE (Author) ICBAS; Lens, SMA (Author) Other

Journal

Title: Chromosoma

Vol. 119

Pages: 405-413

ISSN: 0009-5915

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-003-45T

DOI: 10.1007/s00412-010-0265-x

Abstract (EN): Error-free chromosome segregation requires that all chromosomes biorient on the mitotic spindle. The motor protein Centromere-associated protein E (CENP-E) facilitates chromosome congression by mediating the lateral sliding of sister chromatids along existing K-fibers, while the mitotic kinase Aurora B detaches kinetochore-microtubule interactions that are not bioriented. Whether these activities cooperate to promote efficient chromosome biorientation and timely anaphase onset is not known. We here show that the chromosomes that fail to congress after CENP-E depletion displayed high centromeric Aurora B kinase activity. This activity destabilized spindle pole proximal kinetochore-microtubule interactions resulting in a checkpoint-dependent mitotic delay that allowed CENP-E-independent chromosome congression, thus reducing chromosome segregation errors. This shows that Aurora B keeps the mitotic checkpoint active by destabilizing kinetochore fibers of polar chromosomes to permit chromosome congression in CENP-E-compromised cells and implies that this kinase normally prevents pole proximal syntelic attachments to allow CENP-E-mediated congression of mono-oriented chromosomes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9