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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), pp. 4530-4540. (doi:10.1093/nar/29.22.4530).

Record type: Article


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.

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Published date: 2001


Local EPrints ID: 26630
ISSN: 0305-1048
PURE UUID: 32848078-bad7-48ab-9011-9d35119b0e2a

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Date deposited: 24 Apr 2006
Last modified: 17 Jul 2017 16:06

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Author: Katherine L. Sugars
Author: Vishwanie Budhram-Mahadeo
Author: Graham Packham
Author: David S. Latchman

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