A minimal Bcl-x promoter is activated by Brn-3a and repressed by p53
Sugars, Katherine L., Budhram-Mahadeo, Vishwanie, Packham, Graham and Latchman, David S. (2001) A minimal Bcl-x promoter is activated by Brn-3a and repressed by p53. Nucleic Acids Research, 29, (22), 4530-4540. (doi:10.1093/nar/29.22.4530).
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The Brn-3a transcription factor stimulates the expression of the anti-apoptotic Bcl-2 and Bcl-x proteins and protects neuronal cells from apoptosis. Here we show that a minimal Bcl-x promoter is activated by Brn-3a and that this stimulation is prevented by the pro-apoptotic p53 protein. Both these effects are mediated via Bcl-x promoter sequences, which are indistinguishable from those required for minimal basal promoter activity. A newly described upstream Bcl-x promoter is also activated by Brn-3a with this activation being prevented by p53. Hence, Brn-3a-mediated activation of two distinct Bcl-x promoters and of the Bcl-2 promoter is blocked by p53 whereas this is not observed for Brn-3a activated promoters derived from genes not involved in inhibiting apoptosis. p53 therefore appears to specifically target the activation by Brn-3a of promoters derived from genes with an anti-apoptotic effect and this may be involved in the pro-apoptotic activity of p53.
|Subjects:||R Medicine > R Medicine (General)
Q Science > QH Natural history > QH426 Genetics
|Divisions:||University Structure - Pre August 2011 > School of Medicine > Cancer Sciences
|Date Deposited:||24 Apr 2006|
|Last Modified:||06 Aug 2015 02:27|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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