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2005 ; ä (ä): 1-12
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TGF-beta signaling
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Savage-Dunn C
WormBook
2005[Sep]; ä (ä): 1-12
PMID18050404
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TGF-beta superfamily ligands play fundamental roles in the development and
physiology of diverse animal species. Genetic and genomic analyses in the model
organism Caenorhabditis elegans have contributed to the understanding of
TGF-beta-related signal transduction mechanisms. In this chapter, I describe the
currently characterized TGF-beta-related signals and signal transduction
cassettes in C. elegans. Homology searches of the genome identify five
TGF-beta-related genes, for which functions have been identified for three. Two
of the TGF-beta-related genes, daf-7 and dbl-1, function through conventional
signaling pathways. These signaling pathways are comprised of ser/thr kinase
receptors, Smads, and transcription co-factors. A third TGF-beta-related gene,
unc-129, functions in axonal guidance using novel signaling mechanisms. Thus,
TGF-beta-related signaling in C. elegans proceeds via both conserved and novel
paradigms that can inform studies in other animal systems.