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- W2947925034 abstract "Notch signaling plays a pleiotropic role in a variety of cellular processes, including cell fate determination, differentiation, proliferation and apoptosis. The increasingly complex regulatory mechanisms of Notch signaling account for the many functions of Notch during development. Using a yeast two-hybrid screen, we identified the Drosophila DNA-binding protein Hat-trick (Htk) to be an interacting partner of Notch-intracellular domain (Notch-ICD); their physical interaction was further validated by co-immunoprecipitation experiments. htk genetically interacts with Notch pathway components in trans-heterozygous combinations. Loss of htk function in htk mutant somatic clones resulted in the downregulation of Notch targets, whereas its overexpression caused ectopic expression of Notch targets, without affecting the level of the Notch protein. In the present study, immunocytochemical analyses demonstrate that Htk and overexpressed Notch-ICD colocalize in the same nuclear compartment. Here, we also show that Htk cooperates with Notch-ICD and Suppressor of Hairless to form an activation complex and binds to the regulatory sequences of Notch downstream targets such as Enhancer of Split complex genes, to direct their expression. Together, our results suggest a novel mode of regulation of Notch signaling by the chromatin-modeling protein Htk." @default.
- W2947925034 created "2019-06-07" @default.
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- W2947925034 date "2019-01-01" @default.
- W2947925034 modified "2023-10-02" @default.
- W2947925034 title "Regulation of notch signaling by a chromatin modeling protein Hat-trick" @default.
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- W2947925034 doi "https://doi.org/10.1242/dev.170837" @default.
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