Cited by 716Developmental Biology and Gene RegulationHippo pathway signaling and YAP/TAZCellular Mechanics and Interactions

Localization of apical epithelial determinants by the basolateral PDZ protein Scribble

Bilder, David, Perrimon, Norbert·2000·Nature

Abstract

The generation of membrane domains with distinct protein constituents is a hallmark of cell polarization. In epithelia, segregation of membrane proteins into apical and basolateral compartments is critical for cell morphology, tissue physiology and cell signalling. Drosophila proteins that confer apical membrane identity have been found, but the mechanisms that restrict these determinants to the apical cell surface are unknown. Here we show that a laterally localized protein is required for the apical confinement of polarity determinants. Mutations in Drosophila scribble (scrib), which encodes a multi-PDZ (PSD-95, Discs-large and ZO-1) and leucine-rich-repeat protein, cause aberrant cell shapes and loss of the monolayer organization of embryonic epithelia. Scrib is localized to the epithelial septate junction, the analogue of the vertebrate tight junction, at the boundary of the apical and basolateral cell surfaces. Loss of scrib function results in the misdistribution of apical proteins and adherens junctions to the basolateral cell surface, but basolateral protein localization remains intact. These phenotypes can be accounted for by mislocalization of the apical determinant Crumbs. Our results show that the lateral domain of epithelia, particularly the septate junction, functions in restricting apical membrane identity and correctly placing adherens junctions.

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Crossref · 10.1038/35001108

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Authors
Bilder, D., & Perrimon, N.
Affiliations
  • Harvard University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Bilder, David
Venue
Nature
Published
2000-02
Volume
403
Issue
6770
Pages
676-680
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1521774859
Cited by
716
References
31
Citations by year
2026: 10 · 2025: 13 · 2024: 15 · 2023: 14 · 2022: 25 · 2021: 21 · 2020: 24 · 2019: 31 · 2018: 22 · 2017: 30 · 2016: 26 · 2015: 24 · 2014: 35 · 2013: 34 · 2012: 30
FWCI
16.02
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
Scribble, cell polarity, epithelial polarity, PDZ domain proteins, septate junctions, tight junctions, Crumbs, adherens junctions, Drosophila, cell shape
MeSH terms
Amino Acid Sequence, Animals, Cloning, Molecular, Drosophila, Epithelial Cells, Intercellular Junctions, Membrane Proteins, Molecular Sequence Data, Mutation, Tissue Distribution, Open Reading Frames, Cell Polarity, Protein Structure, Tertiary, Drosophila Proteins

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