Functional analysis of murine CBF1 during Drosophila development
Article first published online: 5 JAN 2006
Copyright © 2006 Wiley-Liss, Inc.
Special Issue: Campos-Ortega Special Focus
Volume 235, Issue 4, pages 918–927, April 2006
How to Cite
Kaspar, M. and Klein, T. (2006), Functional analysis of murine CBF1 during Drosophila development. Dev. Dyn., 235: 918–927. doi: 10.1002/dvdy.20667
- Issue published online: 10 MAR 2006
- Article first published online: 5 JAN 2006
- Manuscript Accepted: 14 NOV 2005
- Deutsche Forschungs-Gemeinschaft. Grant Number: SFB 572
- Drosophila development;
- CBF1 function;
- Notch-independent CBF1 activity
Transcription factors of the CSL family are the main mediators of the Notch signalling pathway. The CSL factor in Drosophila is called Suppressor of Hairless (Su(H)) and it has been shown that it acts as a transcriptional repressor in the absence of a Notch signal and as a transcriptional activator in its presence in several developmental contexts. Furthermore, recent data suggest that Su(H) can also activate and maintain transcription of some target genes in a Notch-independent manner. However, although it has been shown that the mammalian CSL ortholog, CBF1, acts as a repressor of transcription in cell culture experiments, so far in vivo evidence for such a function has been lacking. Moreover, it is not known whether CBF1 can activate transcription in a Notch-independent manner, just like Su(H). Here we have investigated these questions by introducing murine CBF1 (mCBF1) and asked whether it can functionally replace Su(H) during Drosophila development. We found that this is indeed the case. We show that mCBF1 can act as a repressor of transcription and can activate and maintain the expression of some target genes in a Notch-independent manner. Our results, therefore, indicate that CBF1 can exert these functions also in its normal context, that is during mammalian development. Developmental Dynamics 235:918–927, 2006. © 2006 Wiley-Liss, Inc.