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Journal Article

Requirement for Drosophila 14-3-3 zeta in Raf-dependent photoreceptor development.

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Vorbrüggen,  G.
Research Group of Molecular Cell Dynamics, MPI for biophysical chemistry, Max Planck Society;

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Jäckle,  H.
Department of Molecular Developmental Biology, MPI for biophysical chemistry, Max Planck Society;

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Citation

Kockel, L., Vorbrüggen, G., Jäckle, H., Mlodzik, M., & Bohmann, D. (1997). Requirement for Drosophila 14-3-3 zeta in Raf-dependent photoreceptor development. Genes and Development, 11(9), 1140-1147. doi:10.1101/gad.11.9.1140.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-2967-F
Abstract
Based on biochemical and functional data obtained with tissue culture cells and yeast, 14-3-3 proteins have been implicated in a number of different signal transduction processes, in particular in the signal-dependent activation of protein kinases. We performed a functional analysis of 14-3-3 in a multicellular organism, initiated by the cloning of a 14-3-3 zeta homolog of Drosophila melanogaster, termed D14-3-3 zeta. D14-3-3 zeta transcripts are strongly enriched in the developing central nervous system. In addition, they are predominantly expressed in the region posterior to the morphogenetic furrow of the eye imaginal disc where cells differentiate as photoreceptors. In these cells D14-3-3 zeta is localized apically. Both the expression pattern and the subcellular localization are consistent with the proposed function of 14-3-3 proteins in Ras/Raf/MAPK signaling. D14-3-3 zeta mutant analysis combined with rescue experiments involving gain-of-function alleles of Raf and Ras indicate that D14-3-3 zeta is an essential component of the Raf/Ras signaling pathway and necessary for photoreceptor differentiation. It acts upstream of Raf and downstream of Ras.