Reference Report

Reference
Citation	Adler, P., Charlton, J., Liu, J. (1998). Mutations in the cadherin superfamily member gene dachsous cause a tissue polarity phenotype by altering frizzled signaling. Development 125(5): 959--968. (Export to RIS)
FlyBase ID	FBrf0101864
Publication Type	Research paper
PubMed ID	9449678
PubMed Abstract	The adult cuticular wing of Drosophila is covered by an array of distally pointing hairs that reveals the planar polarity of the wing. We report here that mutations in dachsous disrupt this regular pattern, and do so by affecting frizzled signaling. dachsous encodes a large membrane protein that contains many cadherin domains and dachsous mutations cause deformed body parts. We found that mutations in dachsous also result in a tissue polarity phenotype that at the cellular level is similar to frizzled, dishevelled and prickle, as many cells form a single hair of abnormal polarity. Although their cellular phenotype is similar to frizzled, dishevelled and prickle, dachsous mutant wings display a unique and distinctive abnormal hair polarity pattern including regions of reversed polarity. The development of this pattern requires the function of frizzled pathway genes suggesting that in a dachsous mutant the frizzled pathway is functioning - but in an abnormal way. Genetic experiments indicated that dachsous was not required for the intracellular transduction of the frizzled signal. However, we found that dachsous clones disrupted the polarity of neighboring wild-type cells suggesting the possibility that dachsous affected the intercellular signaling function of frizzled. Consistent with this hypothesis we found that frizzled clones in a dachsous mutant background displayed enhanced domineering non-autonomy, and that the anatomical direction of this domineering non-autonomy was altered in regions of dachsous wings that have abnormal hair polarity. The direction of this domineering nonautonomy was coincident with the direction of the abnormal hair polarity. We conclude that dachsous causes a tissue polarity phenotype because it alters the direction of frizzled signaling.
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Language of Publication	English
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Publication Type	Journal
Abbreviation	Development
Title	Development
Publication Year	1987-
ISBN/ISSN	0950-1991
Data from Reference
Aberrations (5)
	Df(2L)al Df(2L)ast2 Df(2L)S3 Df(3L)fz-D21 In(2LR)bw^V1
Alleles (20)
	ds¹ ds^33k ds^UAO71 ds^YAC41 ds^YM31 dsh¹ fy¹ fy⁶ fz²³ fz²⁴ fz²⁵ fz³⁰ fz^HD21 fz^I.hs fz^unspecified in^HC31 in^IH56 in^II53 mwh³ pk¹
Constructs (1)
	P{hsfzI}
Genes (8)
	arm ds dsh fy fz in mwh pk