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Cdc42 antagonizes Rho1 activity at adherens junctions to limit epithelial cell apical tension

Journal Article · · Journal of Cell Biology
 [1];  [2]
  1. Washington Univ., St. Louis, MO (United States). Dept. of Medicine; Washington Univ., St. Louis, MO (United States). Dept. of Medicine and Department of Cell Biology and Physiology; DOE/OSTI
  2. Washington Univ., St. Louis, MO (United States). Dept. of Medicine; Washington Univ., St. Louis, MO (United States). Dept. of Medicine and Department of Cell Biology and Physiology
In epithelia, cells are arranged in an orderly pattern with a defined orientation and shape. Cadherin containing apical adherens junctions (AJs) and the associated actomyosin cytoskeleton likely contribute to epithelial cell shape by providing apical tension. The Rho guanosine triphosphatases are well known regulators of cell junction formation, maintenance, and function. Specifically, Rho promotes actomyosin activity and cell contractility; however, what controls and localizes this Rho activity as epithelia remodel is unresolved. Using mosaic clonal analysis in the Drosophila melanogaster pupal eye, we find that Cdc42 is critical for limiting apical cell tension by antagonizing Rho activity at AJs. Cdc42 localizes Par6–atypical protein kinase C (aPKC) to AJs, where this complex limits Rho1 activity and thus actomyosin contractility, independent of its effects on Wiskott-Aldrich syndrome protein and p21-activated kinase. Thus, in addition to its role in the establishment and maintenance of apical–basal polarity in forming epithelia, the Cdc42–Par6–aPKC polarity complex is required to limit Rho activity at AJs and thus modulate apical tension so as to shape the final epithelium.
Research Organization:
Washington Univ., St. Louis, MO (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
OSTI ID:
1625155
Journal Information:
Journal of Cell Biology, Journal Name: Journal of Cell Biology Journal Issue: 1 Vol. 187; ISSN 0021-9525
Publisher:
Rockefeller University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Morphogenesis: Multitalented GTPases Seeking New Jobs journal November 2009
The Cdc42/Par6/aPKC Polarity Complex Regulates Apoptosis-Induced Compensatory Proliferation in Epithelia journal April 2010
Interplay between the Dividing Cell and Its Neighbors Regulates Adherens Junction Formation during Cytokinesis in Epithelial Tissue journal February 2013
Dynamics of adherens junctions in epithelial establishment, maintenance, and remodeling journal March 2011
Rap1 and Canoe/afadin are essential for establishment of apical–basal polarity in the Drosophila embryo journal April 2013
Rho1 regulates adherens junction remodeling by promoting recycling endosome formation through activation of myosin II journal October 2014
A novel interplay between GEFs orchestrates Cdc42 activity during cell polarity and cytokinesis posted_content January 2019
Thyroid bud morphogenesis requires CDC42- and SHROOM3-dependent apical constriction journal January 2016
Mechanosensitive Adaptation of E-Cadherin Turnover across adherens Junctions journal June 2015
Disruption of the Cdc42/Par6/aPKC or Dlg/Scrib/Lgl Polarity Complex Promotes Epithelial Proliferation via Overlapping Mechanisms journal July 2016
Rab11 Helps Maintain Apical Crumbs and Adherens Junctions in the Drosophila Embryonic Ectoderm text January 2009
Epithelial junctions and Rho family GTPases: the zonular signalosome journal October 2014
The interdependence of the Rho GTPases and apicobasal cell polarity journal April 2014
Willin and Par3 cooperatively regulate epithelial apical constriction through aPKC-mediated ROCK phosphorylation journal June 2011
Adherens junctions: from molecules to morphogenesis journal July 2010
Cellular contractility coordinates cytoskeletal dynamics and cell behaviour during Drosophila abdominal morphogenesis posted_content January 2019
Adherens Junctions on the Move—Membrane Trafficking of E-Cadherin journal January 2017
A novel interplay between GEFs orchestrates Cdc42 activity during cell polarity and cytokinesis in fission yeast journal November 2019
Crossroads of integrins and cadherins in epithelia and stroma remodeling journal May 2012

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