Cited by 106Fungal and yeast genetics researchMicrotubule and mitosis dynamicsCellular transport and secretion

Three-dimensional ultrastructure of the septin filament network in Saccharomyces cerevisiae

Open access
Bertin, Aurélie, McMurray, Michael A., Pierson, Jason, Thai, Luong, McDonald, Kent L., Zehr, Elena A., García, Galo, Peters, Peter +2 more·2012·Molecular Biology of the Cell

Abstract

Septins are conserved GTP-binding proteins involved in membrane compartmentalization and remodeling. In budding yeast, five mitotic septins localize at the bud neck, where the plasma membrane is enriched in phosphatidylinositol-4,5-bisphosphate (PtdIns4,5P(2)). We previously established the subunit organization within purified yeast septin complexes and how these hetero-octamers polymerize into filaments in solution and on PtdIns4,5P(2)-containing lipid monolayers. How septin ultrastructure in vitro relates to the septin-containing filaments observed at the neck in fixed cells by thin-section electron microscopy was unclear. A morphological description of these filaments in the crowded space of the cell is challenging, given their small cross section. To examine septin organization in situ, sections of dividing yeast cells were analyzed by electron tomography of freeze-substituted cells, as well as by cryo-electron tomography. We found networks of filaments both perpendicular and parallel to the mother-bud axis that resemble septin arrays on lipid monolayers, displaying a repeat pattern that mirrors the molecular dimensions of the corresponding septin preparations in vitro. Thus these in situ structures most likely represent septin filaments. In viable mutants lacking a single septin, in situ filaments are still present, although more disordered, consistent with other evidence that the in vivo function of septins requires filament formation.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1091/mbc.e11-10-0850

Cites

65 of 65 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Bertin, A., McMurray, M. A., Pierson, J., Thai, L., McDonald, K. L., Zehr, E. A., García, G., Peters, P., Thorner, J., & Nogales, E.
Affiliations
  • University of California, Berkeley (US)
  • The Netherlands Cancer Institute (NL)
  • Howard Hughes Medical Institute (US)
Corresponding author
Nogales, Eva
Venue
Molecular Biology of the Cell
Published
2012-02
Volume
23
Issue
3
Pages
423-432
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2013196716
Cited by
106
References
64
Citations by year
2026: 5 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 5 · 2021: 10 · 2020: 8 · 2019: 3 · 2018: 8 · 2017: 4 · 2016: 14 · 2015: 12 · 2014: 9 · 2013: 7 · 2012: 6
FWCI
2.85
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of General Medical Sciences (R00GM086603, K99 GM86603, R01GM21841, R01GM101314, K99GM086603, R01GM021841)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • 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
Keywords
septins, Saccharomyces cerevisiae, bud neck, membrane compartmentalization, electron tomography, cryo-electron tomography, thin section electron microscopy, filament polymerization
MeSH terms
Cytoskeleton, Mutation, Saccharomyces cerevisiae, Imaging, Three-Dimensional, Saccharomyces cerevisiae Proteins, Septins

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review