Rate of transcription elongation and sequence-specific pausing by RNA polymerase I directly influence rRNA processing.
Rate of transcription elongation and sequence-specific pausing by RNA polymerase I directly influence rRNA processing.
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DOI:
10.1016/j.jbc.2022.102730
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发表时间:
2022-12
影响因子:
4.8
通讯作者:
Schneider, David A.
中科院分区:
文献类型:
--
作者:
Huffines, Abigail K.;Engel, Krysta L.;French, Sarah L.;Zhang, Yinfeng;Viktorovskaya, Olga V.;Schneider, David A.
One of the first steps in ribosome biogenesis is transcription of the ribosomal DNA by RNA polymerase I (Pol I). Processing of the resultant rRNA begins cotranscriptionally, and perturbation of Pol I transcription elongation results in defective rRNA processing. Mechanistic insight regarding the link between transcription elongation and ribosome assembly is lacking because of limited in vivo methods to assay Pol I transcription. Here, we use native elongating transcript sequencing (NET-Seq) with a strain of Saccharomyces cerevisiae containing a point mutation in Pol I, rpa190-F1205H, which results in impaired rRNA processing and ribosome assembly. We previously demonstrated that this mutation caused a mild reduction in the transcription elongation rate of Pol I in vitro; however, transcription elongation by the mutant has not been characterized in vivo. Here, our findings demonstrate that the mutant Pol I has an increased pause propensity during processive transcription elongation both in vitro and in vivo. NET-Seq reveals that rpa190-F1205H Pol I displays alternative pause site preferences in vivo. Specifically, the mutant is sensitized to A/G residues in the RNA:DNA hybrid and at the last incorporated nucleotide position. Furthermore, both NET-Seq and EM analysis of Miller chromatin spreads reveal pileups of rpa190-F1205H Pol I throughout the ribosomal DNA, particularly at the 5′ end of the 35S gene. This combination of in vitro and in vivo analyses of a Pol I mutant provides novel insights into Pol I elongation properties and indicates how these properties are crucial for efficient cotranscriptional rRNA processing and ribosome assembly.
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影响因子:
10.5
作者:
MOUGEY, EB;OREILLY, M;SOLLNERWEBB, B
通讯作者:
SOLLNERWEBB, B
DOI:
10.1126/science.1251871
发表时间:
2014-05-30
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
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通讯作者:
Weissman JS
DOI:
10.1073/pnas.96.17.9545
发表时间:
1999-08-17
影响因子:
11.1
作者:
Pan, T;Artsimovitch, I;Sosnick, TR
通讯作者:
Sosnick, TR
DOI:
10.1083/jcb.201006040
发表时间:
2011-01-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Albert B;Léger-Silvestre I;Normand C;Ostermaier MK;Pérez-Fernández J;Panov KI;Zomerdijk JC;Schultz P;Gadal O
通讯作者:
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影响因子:
16
作者:
Kos M;Tollervey D
通讯作者:
Tollervey D