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Transcriptionally promiscuous "blurry" promoters in Tc1/mariner transposons allow transcription in distantly related genomes.


ABSTRACT: Background:We have recently described a peculiar feature of the promoters in two Drosophila Tc1-like elements, Bari1 and Bari3. The AT-richness and the presence of weak core-promoter motifs make these promoters, that we have defined "blurry", able to activate transcription of a reporter gene in cellular systems as diverse as fly, human, yeast and bacteria. In order to clarify whether the blurry promoter is a specific feature of the Bari transposon family, we have extended this study to promoters isolated from three additional DNA transposon and from two additional LTR retrotransposons. Results:Here we show that the blurry promoter is also a feature of two vertebrate transposable elements, Sleeping Beauty and Hsmar1, belonging to the Tc1/mariner superfamily. In contrast, this feature is not shared by the promoter of the hobo transposon, which belongs to the hAT superfamily, nor by LTR retrotransposon-derived promoters, which, in general, do not activate transcription when introduced into non-related genomes. Conclusions:Our results suggest that the blurry promoter could be a shared feature of the members of the Tc1/mariner superfamily with possible evolutionary and biotechnological implications.

SUBMITTER: Palazzo A 

PROVIDER: S-EPMC6446368 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Transcriptionally promiscuous "blurry" promoters in Tc1/<i>mariner</i> transposons allow transcription in distantly related genomes.

Palazzo Antonio A   Lorusso Patrizio P   Miskey Csaba C   Walisko Oliver O   Gerbino Andrea A   Marobbio Carlo Marya Thomas CMT   Ivics Zoltán Z   Marsano René Massimiliano RM  

Mobile DNA 20190403


<h4>Background</h4>We have recently described a peculiar feature of the promoters in two <i>Drosophila Tc1</i>-like elements, <i>Bari1</i> and <i>Bari3</i>. The AT-richness and the presence of weak core-promoter motifs make these promoters, that we have defined "blurry", able to activate transcription of a reporter gene in cellular systems as diverse as fly, human, yeast and bacteria. In order to clarify whether the blurry promoter is a specific feature of the <i>Bari</i> transposon family, we h  ...[more]

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