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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Human gammaherpesvirus 8 Homo sapiens

PROVIDER: GSE201046 | GEO | 2022/11/19

REPOSITORIES: GEO

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [eCLIP]

Project description:Control of RNA Polymerase II (pol II) elongation is a critical component of gene expression in mammalian cells. The PNUTS-protein phosphatase 1 (PP1) complex controls elongation rates, slowing pol II after polyadenylation sites to promote termination. The Kaposi's sarcoma-associated herpesvirus (KSHV) co-opts pol II to express its genes, but little is known about its regulation of pol II elongation. We identified PNUTS as a suppressor of a KSHV reporter gene in a genome-wide CRISPR screen. PNUTS depletion also enhances global KSHV gene expression and overall viral replication. Reflecting its host gene activities, PNUTS binds viral RNAs downstream of polyadenylation sites, restricts transcription readthrough of viral genes, and requires PP1 interaction. Surprisingly, PNUTS represses the KSHV reporter by decreasing productive elongation at the 5´-end of the gene. From these data, we conclude that PNUTS' activity forms an intrinsic barrier to KSHV replication likely by suppressing pol II elongation at promoter-proximal regions.

2022-11-19 | GSE201045 | GEO

The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [CRISPR]

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [RNA-seq]

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [ChIP-seq]

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [ChIP-Seq II]

Project description:In this study, we found that the host protein PNUTS suppressed Kaposi's sarcoma-associated herpesvirus (KSHV) gene expression during lytic reactivation and from heterologous viral reporters. To gain insights into the mechanism, we performed ChIP-seq of the pol II subunit RPB3 in cells with an integrated reporter containing the KSHV ORF59 gene. Our results were consistent with previous reports showing that depletion of PNUTS leads to global loss of pol II slow down and termination after polyadenylation sites. In contrast, PNUTS depletion appeared to decrease promoter-proximal pausing on our integrated reporter suggesting a distinct mode of gene regulation on viral genes.

2022-11-22 | GSE215345 | GEO

The PNUTS-PP1 complex acts as an intrinsic barrier to herpesvirus KSHV gene expression and replication.

Project description:Control of RNA Polymerase II (pol II) elongation is a critical component of gene expression in mammalian cells. The PNUTS-PP1 complex controls elongation rates, slowing pol II after polyadenylation sites to promote termination. The Kaposi's sarcoma-associated herpesvirus (KSHV) co-opts pol II to express its genes, but little is known about its regulation of pol II elongation. We identified PNUTS as a suppressor of a KSHV reporter gene in a genome-wide CRISPR screen. PNUTS depletion enhances global KSHV gene expression and overall viral replication. Mechanistically, PNUTS requires PP1 interaction, binds viral RNAs downstream of polyadenylation sites, and restricts transcription readthrough of viral genes. Surprisingly, PNUTS also represses productive elongation at the 5´ ends of the KSHV reporter and the KSHV T1.4 RNA. From these data, we conclude that PNUTS' activity constitutes an intrinsic barrier to KSHV replication likely by suppressing pol II elongation at promoter-proximal regions.

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication

Project description:The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [eCLIP]

Project description:The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [eCLIP]

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [CRISPR]

Project description:The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [CRISPR]

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The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [ChIP-seq]

Project description:The PNUTS-protein phosphatase 1 complex acts as an intrinsic barrier to KSHV replication [ChIP-seq]