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Beati, H., Peek, I., Hordowska, P., Honemann-Capito, M., Glashauser, J., Renschler, F.A., Kakanj, P., Ramrath, A., Leptin, M., Luschnig, S., Wiesner, S., Wodarz, A. (2018). The adherens junction-associated LIM domain protein Smallish regulates epithelial morphogenesis.  J. Cell Biol. 217(3): 1079--1095.
FlyBase ID
FBrf0241176
Publication Type
Research paper
Abstract

In epithelia, cells adhere to each other in a dynamic fashion, allowing the cells to change their shape and move along each other during morphogenesis. The regulation of adhesion occurs at the belt-shaped adherens junction, the zonula adherens (ZA). Formation of the ZA depends on components of the Par-atypical PKC (Par-aPKC) complex of polarity regulators. We have identified the Lin11, Isl-1, Mec-3 (LIM) protein Smallish (Smash), the orthologue of vertebrate LMO7, as a binding partner of Bazooka/Par-3 (Baz), a core component of the Par-aPKC complex. Smash also binds to Canoe/Afadin and the tyrosine kinase Src42A and localizes to the ZA in a planar polarized fashion. Animals lacking Smash show loss of planar cell polarity (PCP) in the embryonic epidermis and reduced cell bond tension, leading to severe defects during embryonic morphogenesis of epithelial tissues and organs. Overexpression of Smash causes apical constriction of epithelial cells. We propose that Smash is a key regulator of morphogenesis coordinating PCP and actomyosin contractility at the ZA.

PubMed ID
PubMed Central ID
PMC5839775 (PMC) (EuropePMC)
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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    J. Cell Biol.
    Title
    Journal of Cell Biology
    Publication Year
    1966-
    ISBN/ISSN
    0021-9525
    Data From Reference
    Aberrations (2)
    Alleles (22)
    Genes (7)
    Physical Interactions (5)
    Cell Lines (1)
    Natural transposons (2)
    Insertions (14)
    Experimental Tools (3)
    Transgenic Constructs (18)