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Dev Cell. 2002 Sep;3(3):351-65.

Unstable kinetochore-microtubule capture and chromosomal instability following deletion of CENP-E.

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1
Ludwig Institute for Cancer Research, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.

Abstract

A selective disruption of the mouse CENP-E gene was generated to test how this kinetochore-associated, kinesin-like protein contributes to chromosome segregation. The removal of CENP-E in primary cells produced spindles in which some metaphase chromosomes lay juxtaposed to a spindle pole, despite the absence of microtubules stably bound to their kinetochores. Most CENP-E-free chromosomes moved to the spindle equator, but their kinetochores bound only half the normal number of microtubules. Deletion of CENP-E in embryos led to early developmental arrest. Selective deletion of CENP-E in liver revealed that tissue regeneration after chemical damage was accompanied by aberrant mitoses marked by chromosome missegregation. CENP-E is thus essential for the maintenance of chromosomal stability through efficient stabilization of microtubule capture at kinetochores.

PMID:
12361599
[Indexed for MEDLINE]
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