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Centrosomes in spindle organization and chromosome segregation: a mechanistic view

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Abstract

Centrosomes are complex structures, which are embedded into the opposite poles of the mitotic spindle of most animals, acting as microtubule organizing centres. Surprisingly, in several biological systems, such as flies, chicken, or human cells, centrosomes are not essential for cell division. Nonetheless, they ensure faithful chromosome segregation. Moreover, mis-functioning centrosomes can act in a dominant-negative manner, resulting in erroneous mitotic progression. Here, I review the mechanisms by which centrosomes contribute to proper spindle organization and faithful chromosome segregation under physiological conditions and discuss how errors in centrosome function impair transmission of the genomic material in a pathological setting.

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Abbreviations

ASPM:

Abnormal spindle-like microcephaly-associated protein

Cdk5rap2:

Cyclin-dependent kinase 5 regulatory-associated protein 2

CENP:

Centromere-associated protein

CEP:

Centrosomal protein

C-Nap1:

Centrosomal Nek2-associated protein 1

CPAP:

Centrosomal P4.1-associated protein

CRISPR:

Clustered regularly interspaced short palindromic repeats

EGFR:

Epidermal growth factor receptor

Mad2:

Mitotic arrest deficient 2

MCAK:

Mitotic centromere-associated protein

MCPH1:

Microcephaly 1

Nek:

NIMA-related kinase

NuMA:

Nuclear mitotic apparatus protein

Plk:

Polo-like kinase

PTEN:

Phosphatase and tensin homolog

RNAi:

RNA interference

Sas-4:

Spindle assembly abnormal protein 4

VEGF:

Vascular endothelial growth factor

WDR62:

WD40 repeat protein 62

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Acknowledgements

I thank M. Gotta (Univ. of Geneva, Switzerland) and the Meraldi lab members for critical discussions of the manuscript. P.M. is funded by an SNF-project grant and the University of Geneva.

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Correspondence to Patrick Meraldi.

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Responsible Editor: Daniela Cimini and Giulia Guarguaglini

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Meraldi, P. Centrosomes in spindle organization and chromosome segregation: a mechanistic view. Chromosome Res 24, 19–34 (2016). https://doi.org/10.1007/s10577-015-9508-2

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  • DOI: https://doi.org/10.1007/s10577-015-9508-2

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