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Sen1 and Rrm3 ensure permissive topological conditions for replication termination

ABSTRACT: Sen1 and Rrm3 ensure permissive topological conditions for replication termination

PROVIDER: PRJNA887757 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21826819_1.fastq.gz	Fastqsanger.gz
	SRR21826819_2.fastq.gz	Fastqsanger.gz
	SRR21826820_1.fastq.gz	Fastqsanger.gz
	SRR21826820_2.fastq.gz	Fastqsanger.gz
	SRR21826821_1.fastq.gz	Fastqsanger.gz

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Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-seq]

Project description:Replication forks terminate at TERs and telomeres. Forks that converge or encounter transcription generate topological stress. Combining genetic, genomic and imaging approaches we found that Rrm3hPif1 and Sen1hSenataxin helicases assist termination at TERs, Sen1 at telomeres. rrm3 and sen1 are synthetic lethal, fail to terminate replication exhibiting lagging chromosomes and fragility at TERs and telomeres. sen1 rrm3 build up RNA-DNA hybrids at TERs, sen1 accumulates RNPII at TERs and telomeres. Double mutants exhibit X-shaped gapped or reversed converging forks. Rrm3 and Sen1 restrain Top1 and Top2 activities, preventing toxic accumulation of positive supercoil at TERs and telomeres. We suggest that Rrm3 and Sen1 coordinate the activities of fork-associated Top1 and Top2 with those of gene loop-associated Top1 and Top2 by preventing DNA and RNA polymerases slowing down when forks encounter transcription head-on or codirectionally, respectively. Hence Rrm3 and Sen1 are essential to generate permissive topological conditions for replication termination.

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Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-chip]

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Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-chip]

Project description:Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-chip]

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Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-seq]

Project description:Sen1 and Rrm3 ensure permissive topological conditions for replication termination [ChIP-seq]

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Sen1 and Rrm3 ensure permissive topological conditions for replication termination

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-10-11 | GSE214930 | GEO

Sen1 is required for robust RNA Polymerase III transcription termination

Project description:R-loop disassembly by the human helicase Senataxin contributes to genome stability and to proper transcription termination at a subset of RNA polymerase II genes. Whether Senataxin-mediated R-loop disassembly also contributes to transcription termination at other classes of genes has remained unclear. Here we show that Sen1, one of two fission yeast homologues of Senataxin, promotes efficient termination of RNA Polymerase III (RNAP3) transcription in vivo. In the absence of Sen1, RNAP3 accumulates downstream of the primary terminator at RNAP3-transcribed genes and produces long exosome-sensitive 3’-extended transcripts. Importantly, neither of these defects was affected by the removal of R-loops. The finding that Sen1 acts as an ancillary factor for RNAP3 transcription termination in vivo challenges the pre-existing view that RNAP3 terminates transcription autonomously. We propose that Sen1 is a cofactor for transcription termination that has been co-opted by different RNA polymerases in the course of evolution.

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The Sen1 Helicase Prevents Spurious Transcription by Controlling Genome-Wide Transcription Termination by RNAPII

Project description:RNA Polymerase II (RNAPII) termination for transcripts containing a polyadenylation signal (PAS) is thought to differ mechanistically from termination for PAS-independent RNAPII transcripts such as sn(o)RNAs. In a screen for factors required for PAS-dependent termination, we identified Sen1, a putative helicase known primarily for its role in PAS-independent termination. We show that Sen1 is required for termination on hundreds of protein-coding genes and suppresses cryptic transcription from nucleosome-free regions on a genomic scale. These effects often overlap with but are also often distinct from those caused by Nrd1 depletion, which also impacts termination of protein-coding and cryptic transcripts, including many genic antisense transcripts. Sen1 controls termination through its helicase activity and stimulates recruitment of factors previously implicated in both PAS-dependent (Rna14, Rat1) and PAS-independent (Nrd1) termination. Thus, RNAPII termination for both protein-coding genes and cryptic transcripts is dependent on multiple pathways. The 2 RNAPII datasets were produced in duplicates and the Sen1 and Nrd1 datasets in triplicates (all IP/Input).

2011-06-01 | E-GEOD-19015 | biostudies-arrayexpress

The Sen1 Helicase Prevents Genome-Wide Spurious Transcription by Controlling Transcription Termination by RNAPII

Project description:It is currently believed that termination by RNAPII occurs differently depending whether a transcript contains or lacks a polyadenylation signal (PAS). By screening for factors deficient for PAS-dependent termination in an in vivo reporter assay, we identified Sen1, a putative helicase mainly known for its role in PAS-independent termination of snoRNAs. We show for the first time that Sen1 regulates transcription termination at protein-encoding genes genome-wide. As well, we show that Sen1 suppresses cryptic transcription genome-wide, besides being required for termination of most snoRNAs. We provide evidence that Sen1 controls termination through its helicase activity and by effectively recruiting to chromatin, factors implicated in PAS-dependent (Rna14 and Rat1) or PAS-independent termination (Nrd1). Importantly, we demonstrate that the effect on transcription termination of Sen1 and Nrd1, although similar, differ quantitatively and qualitatively. Our results suggest that in yeast, termination by RNAPII at protein encoding-genes makes use of redundant pathways.

2010-01-01 | GSE17559 | GEO

The Sen1 Helicase Prevents Spurious Transcription by Controlling Genome-Wide Transcription Termination by RNAPII

2011-06-01 | GSE19015 | GEO

Transcriptome-Wide Binding Sites for Components of the Saccharomyces cerevisiae Non-poly(A) termination Pathway: Nrd1, Nab3 and Sen1

Project description:We report here the transcriptome-wide distribution of yeast Rpb2, Sen1, Nrd1 and Nab3 binding sites. These data sets provide highresolution definition of non-poly(A) terminators, identify novel genes regulated by attenuation of nascent transcripts close to the promoter, and demonstrate the widespread occurrence of Nrd1-bound 3'-antisense transcripts on genes that are poorly expressed. In addition, we show that Sen1 does not cross-link to many expected ncRNAs but surprisingly binds to pre-mRNA transcripts suggesting a role in 3' end formation and/or termination. Six samples by adaptation of PAR-ClIP procedure

2011-09-08 | E-GEOD-31764 | biostudies-arrayexpress

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