Cited by 128Genetic and Kidney Cyst DiseasesCystic Fibrosis Research AdvancesMicrotubule and mitosis dynamics

Septins 2, 7, and 9 and MAP4 co-localize along the axoneme in the primary cilium and control ciliary length

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Ghossoub, Rania, Hu, Qicong, Failler, Marion, Rouyez, Marie-Christine, Spitzbarth, Benjamin, Mostowy, Serge, Wolfrum, Uwe, Saunier, Sophie +3 more·2013·Journal of Cell Science

Abstract

Septins are a large, evolutionarily conserved family of GTPases that form hetero-oligomers and interact with the actin-based cytoskeleton and microtubules. They are involved in scaffolding functions, and form diffusion barriers in budding yeast, the sperm flagellum and the base of primary cilia of kidney epithelial cells. We investigated the role of septins in the primary cilium of retinal pigmented epithelial (RPE) cells, and found that SEPT2 forms a 1:1:1 complex with SEPT7 and SEPT9 and that the three members of this complex colocalize along the length of the axoneme. Similar to observations in kidney epithelial cells, depletion of cilium-localized septins by siRNA-based approaches inhibited ciliogenesis. MAP4, which is a binding partner of SEPT2 and controls the accessibility of septins to microtubules, was also localized to the axoneme where it appeared to negatively regulate ciliary length. Taken together, our data provide new insights into the functions and regulation of septins and MAP4 in the organization of the primary cilium and microtubule-based activities in cells.

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Authors
Ghossoub, R., Hu, Q., Failler, M., Rouyez, M.-C., Spitzbarth, B., Mostowy, S., Wolfrum, U., Saunier, S., Cossart, P., Nelson, W. J., & Benmerah, A.
Affiliations
  • Inserm (FR)
  • Stanford University (US)
  • Institut Cochin (FR)
  • Johannes Gutenberg University Mainz (DE)
  • Institut Pasteur (FR)
  • Hôpital Necker-Enfants Malades (FR)
Venue
Journal of Cell Science
Published
2013-01-01
Volume
126
Issue
Pt 12
Pages
2583-94
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2115649406
Cited by
128
References
52
Citations by year
2026: 8 · 2025: 4 · 2024: 5 · 2023: 4 · 2022: 9 · 2021: 13 · 2020: 9 · 2019: 9 · 2018: 14 · 2017: 9 · 2016: 13 · 2015: 12 · 2014: 10 · 2013: 9
FWCI
9.72
Type
journal article
Language
en
Open access
Locations
  • Journal of Cell Science (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Adobe Systems
  • Wellcome Trust (WT097411MA)
  • National Institute of General Medical Sciences (GM35527, R37GM035527, R01GM035527)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cystic Fibrosis Research Advances
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
septins, SEPT2, SEPT7, SEPT9, MAP4, primary cilia, axoneme, ciliary length, ciliogenesis, retinal pigment epithelial cells, microtubules, protein complex formation, siRNA knockdown
MeSH terms
Actins, Cell Line, Cilia, Epithelial Cells, Humans, Microtubule-Associated Proteins, Retina, Cell Cycle Proteins, Axoneme, Septins

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