Transcriptional potential of the promyelocytic leukaemia nuclear body.
Published: 2006
Language: eng
Number of pages: 60
ISBN-13: 9780494210185
Description: The promyelocytic leukemia nuclear body (PML NB) is a multi-functional protein based nuclear sub-compartment. The contribution of the PML NB to transcriptional regulation is not clearly defined. Here I have demonstrated that plasmid DNA artificially tethered to PML or the targeting domain of Sp100 became localised to PML NBs in the nuclei of SK-N-SH cells. Targeting SV40 promoter driven reporter constructs to PML NBs resulted in repression of transgene activity whereas CMV promoter driven reporters were upregulated. A minimal eukaryotic promoter was unaffected when targeted to PML NBs. Alteration of the local concentration of PML NB components, including Sp 100 and isoforms of the PML protein, resulted in changes in gene expression of targeted reporters. Moreover, the herpes simplex virus trans-activator, ICP0, increased efficiency of transgene activation of plasmid DNA when tethered to the PML NB. 1 conclude that the PML NB affects gene regulation in a promoter dependent fashion.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1493.

Thesis (M.Sc.)--University of Toronto, 2006.

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