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Renfranz, P.J. et al.

Molecular and phylogenetic characterization of Zyx102, a Drosophila orthologue of the zyxin family that interacts with Drosophila Enabled.

Adherens junctions, which are cadherin-mediated junctions between cells, and focal adhesions, which are integrin-mediated junctions between cells and the extracellular matrix, are protein complexes that link the actin cytoskeleton to the plasma membrane and, in turn, to the extracellular environment. Zyxin is a LIM domain protein that is found in vertebrate adherens junctions and focal adhesions. Zyxin's molecular architecture and binding partner repertoire suggest roles in actin assembly and dynamics, cell motility, and nuclear-cytoplasmic communication. In order to study the function of zyxin in development, we have identified a zyxin orthologue in Drosophila melanogaster that we have termed Zyx102. Like its vertebrate counterparts, Zyx102 displays three carboxy-terminal LIM domains, a potential nuclear export signal, and three proline-rich motifs, one of which matches the consensus for mediating an interaction with Ena/VASP (Drosophila Enabled/Vasodilator-stimulated phosphoprotein) proteins. Here we show that Zyx102 and Enabled (Ena), the Drosophila member of the Ena/VASP family, can interact specifically in vitro and that this interaction does not occur when a particular mutant form of Ena, encoded by the lethal ena210 allele, is used. Lastly, we show that the zyx102 gene and Drosophila Ena are co-expressed during oogenesis and early embryogenesis, indicating that the two proteins may be able to interact during the development of the Drosophila egg chamber and early embryo.[1]

References

Molecular and phylogenetic characterization of Zyx102, a Drosophila orthologue of the zyxin family that interacts with Drosophila Enabled. Renfranz, P.J., Siegrist, S.E., Stronach, B.E., Macalma, T., Beckerle, M.C. Gene (2003) [Pubmed]

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