A transcriptional terminator is a novel element of the promoter of the mouse ribosomal RNA gene

Sheryl Henderson, Barbara Sollner-Webb

Research output: Contribution to journalArticle

Abstract

Sequences flanking residue -168 of the mouse rRNA gene are essential to direct efficient transcription in transfected cells and are stimulatory in vitro on closed circular templates. This promoter domain evidently functions by the unprecedented mechanism of terminating polymerase I-directed transcripts. It inhibits transcripts from reading into the initiation region, acting cotranscriptionally to end these RNAs at residue -182 and release them from the template. Most likely, polymerases on tandem ǵenomic rRNA genes are not released upon completing each 40-47S transcript, but traverse the entire spacer to the next promoter-terminator, where they are made available and positioned to favor reinitiation. Through such polymerase recycling, plus the binding of free polymerase, the rDNA promoters could achieve their characteristically high level of transcription.

Original languageEnglish (US)
Pages (from-to)891-900
Number of pages10
JournalCell
Volume47
Issue number6
DOIs
StatePublished - Dec 26 1986

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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