The silent information regulator 1 (Sirt1) is a positive regulator of the Notch pathway in Drosophila

0465215 - BC 2017 RIV GB eng J - Článek v odborném periodiku
Horváth, Matěj - Mihajlović, Zorana - Slaninová, Věra - Perez-Gomez, Raquel - Moshkin, Y. - Krejčí, Alena
The silent information regulator 1 (Sirt1) is a positive regulator of the Notch pathway in Drosophila.
Biochemical Journal. Roč. 473, č. 22 (2016), s. 4129-4143. ISSN 0264-6021. E-ISSN 1470-8728
Grant CEP: GA ČR(CZ) GA14-08583S
Institucionální podpora: RVO:60077344
Klíčová slova: Drosophila * silent information regulator 1 * Notch pathway
Kód oboru RIV: EB - Genetika a molekulární biologie
Impakt faktor: 3.797, rok: 2016
https://portlandpress.com/biochemj/article/473/22/4129/49289/The-silent-information-regulator-1-Sirt1-is-a

The silent information regulator 1 (Sirt1) has previously been shown to have negative effects on the Notch pathway in several contexts. We bring evidence that Sirt1 has a positive effect on Notch activation in Drosophila, in the context of sensory organ precursor specification and during wing development. The phenotype of Sirt1 mutant resembles weak Notch loss of function phenotypes and genetic interactions of Sirt1 with the components of the Notch pathway also suggest a positive role of Sirt1 in Notch signalling. Sirt1 is necessary for the efficient activation of E(spl) genes by Notch in S2N cells. Additionally, the Notch dependent response of several E(spl) genes is sensitive to metabolic stress caused by 2-deoxyglucose treatment, in a Sirt1 dependent manner. We found Sirt1 associated with several proteins involved in Notch repression as well as activation, including the cofactor exchange factor ebi (TBL1), the RLAF/LAF histone chaperon complex and the Tip60 acetylation complex. Moreover, Sirt1 participates in the deacetylation of the CSL transcription factor Su(H). The role of Sirt1 in Notch signalling is therefore more complex than previously recognised and its diverse effects may be explained by a plethora of Sirt1 substrates involved in the regulation of Notch signalling.

Trvalý link: http://hdl.handle.net/11104/0269156