NDLI: Activating-transcription-factor (ATF) regulates human 7S L RNA transcription by RNA polymerase III in vivo and in vitro.

Content Provider	PubMed Central
Author	Bredow, S. Sürig, D. Müller, J. Kleinert, H. Benecke, B. J.
Abstract	The gene-external part of the human 7S L promoter was analyzed by transcription in vitro and in vivo. Compared to the wild type promoter (-178), a -66 5'deletion mutant revealed full activity in vitro but was inefficiently transcribed in vivo. Further deletion to -37 reduced template activity to 50% in vitro and to basal level expression in vivo (below 5%). A DNase I footprint observed around position -50 protected an ATF-like binding site ('TGACGT'). With respect to 7S L transcription regulation, the functionality of this ATF-like binding site was confirmed in competition experiments and by mutation analysis. Furthermore, S100 extracts of cells pretreated with forskolin in vivo to induce the cAMP system, revealed significantly increased transcription of 7S L RNA in vitro, with no effect on a 7S K RNA gene, lacking such an ATF binding site. Thus, the 7S L RNA gene too is controlled by a regulatory element originally defined in class II promoters and represents another rare example where a specific type of transcription regulation in vivo can be mimicked with cell-free extracts in vitro.
Starting Page	6779
File Format	PDF
ISSN	13624962
e-ISSN	13624962
Journal	Nucleic Acids Research
Issue Number	23
Volume Number	18
Language	English
Publisher Date	1990-12-11
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics

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Activating-transcription-factor (ATF) regulates human 7S L RNA transcription by RNA polymerase III in vivo and in vitro.