Cited by 64Fungal and yeast genetics researchMicrotubule and mitosis dynamicsCellular Mechanics and Interactions

The rho-GAP encoded by BEM2 regulates cytoskeletal structure in budding yeast.

Open access
Wang, T, Bretscher, A·1995·Molecular Biology of the Cell

Abstract

Microfilaments are required for polarized growth and morphogenesis in Saccharomyces cerevisiae. To accomplish this, actin cables and patches are redistributed during the cell cycle to direct secretory components to appropriate sites for cell growth. A major component of actin cables is tropomyosin I, encoded by TPM1, that determines or stabilizes these structures. Disruption of TPM1 is not lethal but results in the loss of actin cables and confers a partial defect in polarized secretion. Using a synthetic lethal screen, we have identified seven mutations residing in six genes whose products are required in the absence of Tpm1p. Each mutant exhibited a morphological defect, suggesting a functional link to the actin cytoskeleton. Complementation cloning of one mutation revealed that it lies in BEM2, which encodes a GTPase-activating protein for the RHO1 product. bem2 mutations also show synthetic lethality with rho1 and mutations in certain other cytoskeletal genes (ACT1, MYO1, MYO2, and SAC6) but not with mutations in several noncytoskeletal genes. These data therefore provide a genetic link between the GAP encoded by BEM2 and the functional organization of microfilaments. In addition, we show that bem2 mutations confer benomyl sensitivity and have abnormal microtubule arrays, suggesting that the BEM2 product may also be involved directly or indirectly in regulating microtubule function.

Integrity signals

Registry

Crossref · 10.1091/mbc.6.8.1011

Cites

74 of 74 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • Bem2 in S. cerevisiae acts as a GAP for Rho1 and is implicated in antifungal sensitivity, actin cytoskeleton organization, and bud emergence.

    “Bem2 in S. cerevisiae acts as a GAP for Rho1 and is implicated in antifungal sensitivity (assumed to be due to increased permeability of the cell surface), actin cytoskeleton organization, and bud emergence (35,36).”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Wang, T., & Bretscher, A.
Affiliations
Cornell University (US)
Venue
Molecular Biology of the Cell
Published
1995-08
Volume
6
Issue
8
Pages
1011-1024
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2169811658
Cited by
64
References
73
Citations by year
2025: 1 · 2022: 1 · 2021: 1 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 2
FWCI
2.73
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Massachusetts Institute of Technology
  • National Institutes of Health (1f32gm017018-01)
  • National Institute of General Medical Sciences (GM-39066, 1F32GM-17018, R01GM039066)
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 Mechanics and Interactions
Keywords
RhoGAP, Rho1, actin cytoskeleton, F-actin, actin cables, TPM1, polarized secretion, cell morphogenesis, synthetic lethality, benomyl sensitivity, microtubules, Saccharomyces cerevisiae
MeSH terms
Actins, Benomyl, Cytoskeleton, Fungal Proteins, Genes, Fungal, Genes, Lethal, Genetic Complementation Test, Actin Cytoskeleton, Microtubules, Mutation, Proteins, Saccharomyces cerevisiae, Temperature, Tropomyosin, Signal Transduction, GTP-Binding Proteins, GTPase-Activating Proteins, rho GTP-Binding Proteins, Saccharomyces cerevisiae Proteins

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