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Borealin

Open access
Gassmann, Reto, Carvalho, Ana, Henzing, Alexander J., Ruchaud, Sandrine, Hudson, Damien F., Honda, Reiko, Nigg, Erich A., Gerloff, Dietlind L., Earnshaw, William C.·2004·The Journal of Cell Biology

Abstract

The chromosomal passenger complex of Aurora B kinase, INCENP, and Survivin has essential regulatory roles at centromeres and the central spindle in mitosis. Here, we describe Borealin, a novel member of the complex. Approximately half of Aurora B in mitotic cells is complexed with INCENP, Borealin, and Survivin; and Borealin binds Survivin and INCENP in vitro. A second complex contains Aurora B and INCENP, but no Borealin or Survivin. Depletion of Borealin by RNA interference delays mitotic progression and results in kinetochore–spindle misattachments and an increase in bipolar spindles associated with ectopic asters. The extra poles, which apparently form after chromosomes achieve a bipolar orientation, severely disrupt the partitioning of chromosomes in anaphase. Borealin depletion has little effect on histone H3 serine10 phosphorylation. These results implicate the chromosomal passenger holocomplex in the maintenance of spindle integrity and suggest that histone H3 serine10 phosphorylation is performed by an Aurora B–INCENP subcomplex.

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Metadata

Authors
Gassmann, R., Carvalho, A., Henzing, A. J., Ruchaud, S., Hudson, D. F., Honda, R., Nigg, E. A., Gerloff, D. L., & Earnshaw, W. C.
Venue
The Journal of Cell Biology
Published
2004-07-12
Volume
166
Issue
2
Pages
179-191
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2002125670
Cited by
440
References
0
FWCI
15.19
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Borealin. https://app.cochat.ai/papers/10.1083/jcb.200404001
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Gassmann, R., Carvalho, A., Henzing, A. J., Ruchaud, S., Hudson, D. F., Honda, R., Nigg, E. A., Gerloff, D. L., & Earnshaw, W. C. (2004). Borealin. The Journal of Cell Biology. https://doi.org/10.1083/jcb.200404001

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