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Trends Genet. 2005 Jun;21(6):339-45.

Transcriptional interference--a crash course.

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School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia 5005.


The term "transcriptional interference" (TI) is widely used but poorly defined in the literature. There are a variety of methods by which one can interfere with the process or the product of transcription but the term TI usually refers to the direct negative impact of one transcriptional activity on a second transcriptional activity in cis. Two recent studies, one examining Saccharomyces cerevisiae and the other Escherichia coli, clearly show TI at one promoter caused by the arrival of a transcribing complex initiating at a distant promoter. TI is potentially widespread throughout biology; therefore, it is timely to assess exactly its nature, significance and operative mechanisms. In this article, we will address the following questions: what is TI, how important and widespread is it, how does it work and where should we focus our future research efforts?

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