Notch receptor encodes two structurally separable functions in Drosophila:: A genetic analysis

被引:21
作者
Langdon, T
Hayward, P
Brennan, K
Wirtz-Peitz, F
Sanders, P
Zecchini, V
Friday, A
Balayo, T
Arias, AM
机构
[1] Univ Cambridge, Dept Genet, Cambridge CB2 3EH, England
[2] Univ Manchester, Sch Biol Sci, Manchester, Lancs, England
[3] Univ Cambridge, Dept Zool, Cambridge, England
基金
英国惠康基金;
关键词
Notch; signalling; pattern formation; Drosophila;
D O I
10.1002/dvdy.20735
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
The Notch gene of Drosophila encodes a single transmembrane receptor that plays a central role in the process of lateral inhibition. This process results in the selection of individual mesodermal and neural precurors during the development of the muscular and nervous systems. The activation of Notch during lateral inhibition is mediated by the transmembrane ligand Delta (DI) and effected by the transcription factor Suppressor of Hairless (Su(H)). The same functional cassette plays a role in other processes, in particular, the development and patterning of the wing. Genetic analysis has suggested that, in addition to the Su(H)-dependent pathway, Notch can signal in an Su(H)-independent manner. This process seems to be tightly associated with signalling by Wingless, a member of the Wnt family of signalling molecules. Here, we have analyzed further the possibility that the Notch protein encodes two different functions. To do so, we have studied the activities and genetic properties of different Notch receptors bearing deletions of specific regions of the intracellular and the extracellular domains in different developmental processes, and have sought to correlate the activity of these mutant proteins with those of existing mutants in Notch. Our results support the existence of at least two different activities of Notch each of which can be associated with specific structural domains.
引用
收藏
页码:998 / 1013
页数:16
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