Cited by 120Microtubule and mitosis dynamicsNeurogenesis and neuroplasticity mechanismsDNA Repair Mechanisms

CDK5RAP2 functions in centrosome to spindle pole attachment and DNA damage response

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Barr, Alexis R., Kilmartin, John V., Gergely, Fanni·2010·Journal of Cell Biology

Abstract

The centrosomal protein, CDK5RAP2, is mutated in primary microcephaly, a neurodevelopmental disorder characterized by reduced brain size. The Drosophila melanogaster homologue of CDK5RAP2, centrosomin (Cnn), maintains the pericentriolar matrix (PCM) around centrioles during mitosis. In this study, we demonstrate a similar role for CDK5RAP2 in vertebrate cells. By disrupting two evolutionarily conserved domains of CDK5RAP2, CNN1 and CNN2, in the avian B cell line DT40, we find that both domains are essential for linking centrosomes to mitotic spindle poles. Although structurally intact, centrosomes lacking the CNN1 domain fail to recruit specific PCM components that mediate attachment to spindle poles. Furthermore, we show that the CNN1 domain enforces cohesion between parental centrioles during interphase and promotes efficient DNA damage–induced G2 cell cycle arrest. Because mitotic spindle positioning, asymmetric centrosome inheritance, and DNA damage signaling have all been implicated in cell fate determination during neurogenesis, our findings provide novel insight into how impaired CDK5RAP2 function could cause premature depletion of neural stem cells and thereby microcephaly.

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  1. Stearns T. 2009 Centrosome duplication and maturation. Annu. Rev. Cell Dev. Biol. 10.1146/annurev.cellbio.042308.113252 · DOI

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Authors
Barr, A. R., Kilmartin, J. V., & Gergely, F.
Affiliations
  • University of Cambridge (GB)
  • MRC Laboratory of Molecular Biology (GB)
Corresponding author
Gergely, Fanni
Venue
Journal of Cell Biology
Published
2010-04-05
Volume
189
Issue
1
Pages
23-39
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2142993158
Cited by
120
References
70
Citations by year
2025: 7 · 2024: 5 · 2023: 8 · 2022: 8 · 2021: 3 · 2020: 9 · 2019: 5 · 2018: 3 · 2017: 9 · 2016: 4 · 2015: 14 · 2014: 14 · 2013: 9 · 2012: 10
FWCI
4.19
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Cell Biology (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • Spiral (Imperial College London) (submittedVersion, cc-by-nc-sa)
Funders
Cancer Research UK
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
CDK5RAP2, centrosome, pericentriolar matrix, centrosomin, DNA damage response, G2 cell cycle arrest, primary microcephaly, neurogenesis, Drosophila melanogaster, DT40 B cells
MeSH terms
Animals, Cell Cycle, Cells, Cultured, Chickens, DNA Damage, HeLa Cells, Humans, Spindle Apparatus, Nerve Tissue Proteins, Centrosome, Cell Cycle Proteins, Antigens, Nuclear, Intracellular Signaling Peptides and Proteins

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