RNA polymerase I: a multifunctional molecular machine.
basic_science · Level V
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Abstract
In this issue, Kuhn et al. (2007) report the complete structure of the 14-subunit yeast RNA polymerase (Pol) I enzyme at 12 A resolution using cryo-electron microscopy (cryo-EM). Their study reveals that three subunits of Pol I perform functions in transcription elongation that are outsourced to the transcription factors TFIIF and TFIIS in the analogous Pol II transcription system.
Medical subject headings
- DNA Polymerase I
- RNA Processing, Post-Transcriptional
- RNA, Ribosomal
- Saccharomyces cerevisiae
- Saccharomyces cerevisiae Proteins
- Transcription, Genetic