Cited by 231Microtubule and mitosis dynamicsCellular transport and secretionCellular Mechanics and Interactions

Distinct roles of septins in cytokinesis: SEPT9 mediates midbody abscission

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Estey, Mathew P., Di Ciano-Oliveira, Caterina, Froese, Carol D., Bejide, Margaret T., Trimble, William S.·2010·Journal of Cell Biology

Abstract

Septins are a family of GTP-binding proteins implicated in mammalian cell division. Most studies examining the role of septins in this process have treated the family as a whole, thus neglecting the possibility that individual members may have diverse functions. To address this, we individually depleted each septin family member expressed in HeLa cells by siRNA and assayed for defects in cell division by immunofluorescence and time-lapse microscopy. Depletion of SEPT2, SEPT7, and SEPT11 causes defects in the early stages of cytokinesis, ultimately resulting in binucleation. In sharp contrast, SEPT9 is dispensable for the early stages of cell division, but is critical for the final separation of daughter cells. Rescue experiments indicate that SEPT9 isoforms containing the N-terminal region are sufficient to drive cytokinesis. We demonstrate that SEPT9 mediates the localization of the vesicle-tethering exocyst complex to the midbody, providing mechanistic insight into the role of SEPT9 during abscission.

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Research works printed but not linked: 2

  1. Hall P.A. Bruford E. Russell S.E.H. Macara I.G. Pringle J.R. 2008a Mammalian septin nomenclature. The Septins. Hall P.A. Russell S.E.H. Pringle J.R., Wiley-Blackwell, West Sussex, England, UK 351– 354
  2. Hall P.A. Russell S.E.H. Pringle J.R., 2008b The Septins. Wiley-Blackwell, West Sussex, England, UK 370 pp

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Authors
Estey, M. P., Di Ciano-Oliveira, C., Froese, C. D., Bejide, M. T., & Trimble, W. S.
Affiliations
  • University of Toronto (CA)
  • Program in Cell Biology, Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada 1
  • Hospital for Sick Children (CA)
Corresponding author
Trimble, William S.
Venue
Journal of Cell Biology
Published
2010-11-08
Volume
191
Issue
4
Pages
741-749
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2163000142
Cited by
231
References
45
Citations by year
2026: 8 · 2025: 6 · 2024: 9 · 2023: 13 · 2022: 17 · 2021: 17 · 2020: 14 · 2019: 18 · 2018: 20 · 2017: 17 · 2016: 9 · 2015: 13 · 2014: 17 · 2013: 19 · 2012: 18
FWCI
7.28
Type
journal article
Language
en
Open access
Locations
  • The Journal of Cell Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • Natural Sciences and Engineering Research Council of Canada
  • Ontario Ministry of Research and Innovation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
septins, SEPT9, cytokinesis, SEPT2, SEPT7, binucleation, exocyst complex, vesicle tethering, cell division, HeLa cells
MeSH terms
Cell Line, Humans, Protein Isoforms, RNA, Small Interfering, Cytokinesis, Septins, Time-Lapse Imaging

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