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Diversin regulates heart formation and gastrulation movements in development

Item Type:Article
Title:Diversin regulates heart formation and gastrulation movements in development
Creators Name:Moeller, H. and Jenny, A. and Schaeffer, H.J. and Schwarz-Romond, T. and Mlodzik, M. and Hammerschmidt, M. and Birchmeier, W.
Abstract:Canonical and noncanonical Wnt signaling regulate crucial events in the development of vertebrates and invertebrates. In this work we show that vertebrate Diversin, a potential orthologue of Drosophila Diego, controls fusion of heart precursors and gastrulation movements in zebrafish embryogenesis. These events are regulated by noncanonical Wnt signaling, which is independent of beta-catenin. We found that Diversin directly interacts with Dishevelled and that this interaction is necessary and sufficient to mediate signals of the noncanonical Wnt pathway to downstream effectors like Rho family GTPases and Jun N-terminal kinase. The ankyrin repeats of Diversin are required for the interaction with Dishevelled, for the activation of noncanonical Wnt signaling, and for the biological responses. The mutation K446M in the DEP domain of vertebrate Dishevelled, which mimics a classical Drosophila loss of function mutation, prevents functional interaction with Diversin's ankyrin repeats. Diversin also affects planar cell polarity in Drosophila, which is controlled by the noncanonical Wnt signaling pathway. Our data thus demonstrate that Diversin and Dishevelled function together in a mutually dependent fashion in zebrafish gastrulation and organ formation.
Keywords:Convergence and Extension, Dishevelled, Embryogenesis, Noncanonical Wnt Signaling, Rho Family GTPases, Animals, Drosophila melanogaster, Zebrafish
Source:Proceedings of the National Academy of Sciences of the United States of America
Publisher:National Academy of Sciences
Page Range:15900-15905
Date:24 October 2006
Official Publication:https://doi.org/10.1073/pnas.0603808103
PubMed:View item in PubMed

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