Cited by 295Developmental Biology and Gene RegulationCellular Mechanics and InteractionsHippo pathway signaling and YAP/TAZ

The positioning and segregation of apical cues during epithelial polarity establishment in Drosophila

Open access
Harris, Tony J.C., Peifer, Mark·2005·The Journal of Cell Biology

Abstract

Cell polarity is critical for epithelial structure and function. Adherens junctions (AJs) often direct this polarity, but we previously found that Bazooka (Baz) acts upstream of AJs as epithelial polarity is first established in Drosophila. This prompted us to ask how Baz is positioned and how downstream polarity is elaborated. Surprisingly, we found that Baz localizes to an apical domain below its typical binding partners atypical protein kinase C (aPKC) and partitioning defective (PAR)-6 as the Drosophila epithelium first forms. In fact, Baz positioning is independent of aPKC and PAR-6 relying instead on cytoskeletal cues, including an apical scaffold and dynein-mediated basal-to-apical transport. AJ assembly is closely coupled to Baz positioning, whereas aPKC and PAR-6 are positioned separately. This forms a stratified apical domain with Baz and AJs localizing basal to aPKC and PAR-6, and we identify specific mechanisms that keep these proteins apart. These results reveal key steps in the assembly of the apical domain in Drosophila.

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 · 10.1083/jcb.200505127

Cites

44 of 44 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?

  • The dynein-dependent transport of the Drosophila Par3 homolog Bazooka is required for the segregation of apically localized proteins during the establishment of epithelial polarity.

    “The dynein-dependent transport of the Drosophila Par3 homolog Bazooka is required for the segregation of apically localized proteins during the establishment of epithelial polarity (Harris and Peifer, 2005).”

    From Rassf5 and Ndr kinases act in a novel pathway regulating neuronal polarity through Par3 phosphorylation (2014) · cites this paper as Harris and Peifer, 2005

    The Results section ‘Baz positioning also requires dynein-mediated basal-to-apical transport’ supports dynein’s role in positioning Baz during cellularization. But ‘aPKC and PAR-6 positioning is dynein independent’ reports that apical and basal proteins still segregate in dynein mutants during gastrulation, contrary to the claim that dynein-dependent Baz transport is required for their segregation. (LLM, conf=0.87)

    Checked by a reasoning model — may be wrong.

    Experimental — accuracy not yet measured

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
Harris, T. J. C., & Peifer, M.
Affiliations
University of North Carolina at Chapel Hill (US)
Corresponding author
Peifer, Mark
Venue
The Journal of Cell Biology
Published
2005-08-29
Volume
170
Issue
5
Pages
813-823
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2089839677
Cited by
295
References
44
Citations by year
2026: 5 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 13 · 2021: 12 · 2020: 13 · 2019: 16 · 2018: 12 · 2017: 20 · 2016: 13 · 2015: 16 · 2014: 10 · 2013: 13 · 2012: 24
FWCI
6.80
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Cell Biology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Institutes of Health
  • Canadian Institutes of Health Research
  • Natural Sciences and Engineering Research Council of Canada
  • National Institute of General Medical Sciences (GM-47857, R01GM047857)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
epithelial polarity, Bazooka, adherens junctions, apical domain, atypical protein kinase C, Par6, protein segregation
MeSH terms
Actins, Animals, Cytoskeleton, Drosophila melanogaster, Dyneins, Epithelial Cells, Membrane Proteins, Microtubules, Protein Kinase C, Proteins, Recombinant Fusion Proteins, Body Patterning, Protein Transport, Adherens Junctions, Drosophila Proteins, Intracellular Signaling Peptides and 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