FEBS letters, 2019-02, Vol.593 (3), p.361-368
2019
Details
- Autor(en) / Beteiligte
- Titel
- Dual role of the σ factor in primer RNA synthesis by bacterial RNA polymerase
- Ist Teil von
- FEBS letters, 2019-02, Vol.593 (3), p.361-368
- Ort / Verlag
- England
- Erscheinungsjahr
- 2019
- Link zum Volltext
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Bacterial RNA polymerase (RNAP) serves as a primase during replication of single‐stranded plasmids and filamentous phages. Primer RNA (prRNA) synthesis from the origin regions of these replicons depends on the σ factor that normally participates in promoter recognition. However, it was proposed that σ may not be required for origin recognition but is rather involved in RNA extension by RNAP. Here, by analyzing the natural replication origin of bacteriophage M13 and synthetic ssDNA templates, we show that interactions of σ with promoter‐like motifs stabilize priming complexes and can control prRNA synthesis by trapping RNAP on the template. Thus, the σ factor is involved in both DNA recognition and RNA priming, unifying its functions in transcription initiation from double‐ and single‐stranded templates.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0014-5793eISSN: 1873-3468DOI: 10.1002/1873-3468.13312Titel-ID: cdi_proquest_miscellaneous_2155154164
- Format
- –
- Schlagworte
- aptamers, Bacteriophage M13 - chemistry, Bacteriophage M13 - metabolism, DNA, Single-Stranded - chemistry, DNA, Single-Stranded - metabolism, DNA, Viral - chemistry, DNA, Viral - metabolism, DNA-Directed RNA Polymerases - chemistry, DNA-Directed RNA Polymerases - metabolism, Escherichia coli - enzymology, Escherichia coli Proteins - chemistry, Escherichia coli Proteins - metabolism, oriM13, promoter recognition, Promoter Regions, Genetic, replication priming, RNA - biosynthesis, RNA - chemistry, RNA polymerase, RNA, Bacterial - biosynthesis, Sigma Factor - chemistry, Sigma Factor - metabolism, single‐stranded templates