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. 1998 Dec 15;17(24):7351–7360. doi: 10.1093/emboj/17.24.7351

Notchless encodes a novel WD40-repeat-containing protein that modulates Notch signaling activity.

J Royet 1, T Bouwmeester 1, S M Cohen 1
PMCID: PMC1171080  PMID: 9857191

Abstract

Signaling by Notch family receptors is involved in many cell-fate decisions during development. Several modifiers of Notch activity have been identified, suggesting that regulation of Notch signaling is complex. In a genetic screen for modifiers of Notch activity, we identified a gene encoding a novel WD40-repeat protein. The gene is called Notchless, because loss-of-function mutant alleles dominantly suppress the wing notching caused by certain Notch alleles. Reducing Notchless activity increases Notch activity. Overexpression of Notchless in Xenopus or Drosophila appears to have a dominant-negative effect in that it also increases Notch activity. Biochemical studies show that Notchless binds to the cytoplasmic domain of Notch, suggesting that it serves as a direct regulator of Notch signaling activity.

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Selected References

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