Reference Report

Reference
Citation	Ricos, M.G., Harden, N., Sem, K.P., Lim, L., Chia, W. (1999). Dcdc42 acts in TGF-beta signaling during Drosophila morphogenesis: Distinct roles for the Drac1/JNK and Dcdc42/TGF-beta cascades in cytoskeletal regulation. J. Cell Sci. 112(8): 1225--1235. (Export to RIS)
FlyBase ID	FBrf0108393
Publication Type	Research paper
PubMed ID	10085257
PubMed Abstract	During Drosophila embryogenesis the two halves of the lateral epidermis migrate dorsally over a surface of flattened cells, the amnioserosa, and meet at the dorsal midline in order to form the continuous sheet of the larval epidermis. During this process of epithelial migration, known as dorsal closure, signaling from a Jun-amino-terminal-kinase cascade causes the production of the secreted transforming-growth-factor-beta-like ligand, Decapentaplegic. Binding of Decapentaplegic to the putative transforming-growth-factor-beta-like receptors Thickveins and Punt activates a transforming-growth-factor-beta-like pathway that is also required for dorsal closure. Mutations in genes involved in either the Jun-amino-terminal-kinase cascade or the transforming-growth-factor-beta-like signaling pathway can disrupt dorsal closure. Our findings show that although these pathways are linked they are not equivalent in function. Signaling by the Jun-amino-terminal-kinase cascade may be initiated by the small Ras-like GTPase Drac1 and acts to assemble the cytoskeleton and specify the identity of the first row of cells of the epidermis prior to the onset of dorsal closure. Signaling in the transforming-growth-factor-beta-like pathway is mediated by Dcdc42, and acts during the closure process to control the mechanics of the migration process, most likely via its putative effector kinase DPAK.
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Language of Publication	English
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Publication Type	Journal
Abbreviation	J. Cell Sci.
Title	Journal of Cell Science
Publication Year	1966-
ISBN/ISSN	0021-9533
Data from Reference
Aberrations (1)
	Df(2L)flp147E
Alleles (13)
	bsk^flp147E Cdc42^N17.Scer\UAS Cdc42^V12.Scer\UAS Jra^IA109 kay¹ pnr¹ put¹³⁵ Rac1^N17.Scer\UAS Scer\GAL4^hs.PB Scer\GAL4^ptc-559.1 shn¹ tkv⁷ tkv^TAJ3
Constructs (4)
	P{GAL4-Hsp70.PB} P{UAS-Cdc42.N17} P{UAS-Cdc42.V12} P{UAS-Rac1.N17}
Genes (12)
	bsk Cdc42 Jra kay Pak pnr put Rac1 Scer\GAL4 shn tkv zip
Insertions (2)
	P{GawB}ptc^559.1 P{UAS-tkv}TAJ3