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Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [RIF-seq]

ABSTRACT: Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [RIF-seq]

PROVIDER: PRJNA979187 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24806900.fastq.gz	Fastqsanger.gz
	SRR24807000.fastq.gz	Fastqsanger.gz
	SRR24806901.fastq.gz	Fastqsanger.gz
	SRR24807001.fastq.gz	Fastqsanger.gz
	SRR24806902.fastq.gz	Fastqsanger.gz

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Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [RIF-seq]

Project description:RNA decay is a crucial mechanism for regulating gene expression in response to environmental stresses. In bacteria, RNA-binding proteins (RBPs) are known to be involved in post-transcriptional regulation, but their global impact on RNA half-lives has not been extensively studied. To shed light on the role of the major RBPs ProQ and CspC/E in maintaining RNA stability, we performed RNA sequencing of Salmonella enterica over a time course following treatment with the transcription initiation inhibitor rifampicin (RIF-seq) in the presence and absence of these RBPs. We developed a hierarchical Bayesian model that corrects for confounding factors in rifampicin RNA stability assays and enables us to identify differentially decaying transcripts transcriptome-wide. Our analysis revealed that the median RNA half-life in Salmonella in early stationary phase is less than 1 minute, a third of previous estimates. We found that over half of the 500 most long-lived transcripts are bound by at least one major RBP, suggesting a general role for RBPs in shaping the transcriptome. Integrating differential stability estimates with CLIP-seq revealed that approximately 30% of transcripts with ProQ binding sites and more than 40% with CspC/E binding sites in coding or 3' untranslated regions decay differentially in the absence of the respective RBP. Analysis of differentially destabilized transcripts identified a role for both proteins in the control of respiration, and for ProQ in the oxidative stress response. Our findings provide new insights into post-transcriptional regulation by ProQ and CspC/E, and the importance of RBPs in regulating gene expression.

2024-03-26 | GSE234009 | GEO

Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [CLIP-seq]

2024-03-26 | GSE234007 | GEO

Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [CLIP-seq]

Project description:Improved RNA stability estimation through Bayesian modeling reveals most bacterial transcripts have sub-minute half-lives [CLIP-seq]

| PRJNA979180 | ENA

Improved RNA stability estimation through Bayesian modeling reveals most Salmonella transcripts have subminute half-lives

Project description:Improved RNA stability estimation through Bayesian modeling reveals most Salmonella transcripts have subminute half-lives

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Improved RNA stability estimation through Bayesian modeling reveals most Salmonella transcripts have subminute half-lives

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

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Global RNA half lives in cyanobacteria

Project description:We calculated global RNA half lives for all genes in the cyanobacteria Synechococcus sp. strain PCC 7002. Samples from three replicates of the WT strain were taken before and following the addition of the antibiotic rifampicin to stop nascent transcription. RNA spike-ins were added for normalization and using the number of RNA-sequencing reads we were able to calculate half lives for genes, transcripts, and for each position on the genome.

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Global RNA half lives in cyanobacteria

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analysis of the C. albicans mRNA half-lives

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2011-10-01 | E-TABM-1179 | biostudies-arrayexpress

Improved RNA stability estimation through Bayesian modeling reveals most <i>Salmonella</i> transcripts have subminute half-lives.

Project description:RNA decay is a crucial mechanism for regulating gene expression in response to environmental stresses. In bacteria, RNA-binding proteins (RBPs) are known to be involved in posttranscriptional regulation, but their global impact on RNA half-lives has not been extensively studied. To shed light on the role of the major RBPs ProQ and CspC/E in maintaining RNA stability, we performed RNA sequencing of Salmonella enterica over a time course following treatment with the transcription initiation inhibitor rifampicin (RIF-seq) in the presence and absence of these RBPs. We developed a hierarchical Bayesian model that corrects for confounding factors in rifampicin RNA stability assays and enables us to identify differentially decaying transcripts transcriptome-wide. Our analysis revealed that the median RNA half-life in Salmonella in early stationary phase is less than 1 min, a third of previous estimates. We found that over half of the 500 most long-lived transcripts are bound by at least one major RBP, suggesting a general role for RBPs in shaping the transcriptome. Integrating differential stability estimates with cross-linking and immunoprecipitation followed by RNA sequencing (CLIP-seq) revealed that approximately 30% of transcripts with ProQ binding sites and more than 40% with CspC/E binding sites in coding or 3' untranslated regions decay differentially in the absence of the respective RBP. Analysis of differentially destabilized transcripts identified a role for ProQ in the oxidative stress response. Our findings provide insights into posttranscriptional regulation by ProQ and CspC/E, and the importance of RBPs in regulating gene expression.

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Global analysis of mRNA isoform half-lives: identification of stabilizing and destabilizing elements in yeast

Project description:We measured half-lives of 21,248 mRNA 3’ isoforms in yeast by rapidly depleting RNA polymerase II from the nucleus and performing direct RNA sequencing throughout the decay process. Interestingly, the half-lives of mRNA isoforms from the same gene, including nearly identical isoforms, often vary widely. Based on clusters of isoforms with different half-lives, we identify hundreds of sequences conferring stabilization or destabilization upon mRNAs terminating downstream. One class of stabilizing element is a polyU sequence that can interact with poly(A) tails, inhibit the association of poly(A) binding protein, and confer increased stability upon introduction into ectopic transcripts. More generally, destabilization and stabilization elements are linked to the degree to which the poly(A) tail can engage in double-stranded structures. Isoforms engineered to fold into 3’ stem-loop structures not involving the poly(A) tail exhibit even longer half-lives. We suggest that double-stranded structures at the 3’ ends are a major determinant of mRNA stability. Half-lives of 21,248 mRNA 3’ isoforms in yeast were measured by rapidly depleting RNA polymerase II from the nucleus and performing direct RNA sequencing throughout the decay process.

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