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Gene expression in csr-1 mutants and sequencing of sRNAs from CSR-1 IP complexes and csr-1 and ego-1 mutants

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

OTHER RELATED OMICS DATASETS IN: PRJNA123485PRJNA119517PRJNA123481

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE18167 | GEO | 2009/10/02

SECONDARY ACCESSION(S): PRJNA119517

REPOSITORIES: GEO

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Gene expression in csr-1 mutants and sequencing of sRNAs from CSR-1 IP complexes and csr-1 and ego-1 mutants

Project description:Gene expression in csr-1 mutants and sequencing of sRNAs from CSR-1 IP complexes and csr-1 and ego-1 mutants

| PRJNA119517 | ENA

High-throughput pyrosequencing of endogenous small RNAs from CSR-1 IP complexes and csr-1(tm892) and ego-1(om97) mutants

Project description:High-throughput pyrosequencing of endogenous small RNAs from CSR-1 IP complexes and csr-1(tm892) and ego-1(om97) mutants with corresponding controls. RNAi-related pathways regulate diverse processes, from developmental timing to transposon silencing. Here, we show that in C. elegans the Argonaute CSR-1, the RNA-dependent RNA polymerase EGO-1, the Dicer-related helicase DRH-3, and the Tudor-domain protein EKL-1 localize to chromosomes and are required for proper chromosome segregation. In the absence of these factors chromosomes fail to align at the metaphase plate and kinetochores do not orient to opposing spindle poles. Surprisingly, the CSR-1 interacting small RNAs (22G-RNAs) are antisense to thousands of germline-expressed protein-coding genes. Nematodes assemble holocentric chromosomes in which continuous kinetochores must span the expressed domains of the genome. We show that CSR-1 interacts with chromatin at target loci, but does not down-regulate target mRNA or protein levels. Instead, our findings support a model in which CSR-1 complexes target protein-coding domains to promote their proper organization within the holocentric chromosomes of C. elegans.

2009-10-02 | GSE18165 | GEO

High-throughput pyrosequencing of endogenous small RNAs from CSR-1 IP complexes and csr-1(tm892) and ego-1(om97) mutants

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Dynamic and intricate regulation by the Csr sRNAs in the Arctic Pseudoalteromonas fuliginea.

Project description:The Csr (Carbon Storage Regulator) system is pivotal in controlling various cellular functions in most bacteria, primarily through the CsrA protein and its antagonistic sRNAs. However, riboregulatory networks are less explored in non-model organisms, particularly those in extreme environments. In this study, we discovered two new sRNAs of the Csr system, Pf2 and Pf3, in the Arctic bacterium Pseudoalteromonas fuliginea BSW20308, along with the previously known Pf1. By studying the impact of these Pf sRNAs on CsrA targetomes and physiological processes, we found a significant influence on various cellular functions and a collective effect on the interaction dynamics between CsrA and RNAs. Furthermore, we identified additional sRNAs that can interact with CsrA and mRNAs. Overall, our results emphasize the growing influence of the Csr system on cellular physiology through intricate sRNA regulation of CsrA, revealing riboregulatory network complexity and significance in non-model organisms.

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Phytophthora infestans Ago1 binds miRNA and sRNAs from effector genes and transposable elements

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

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EGO-1, an essential C. elegans RdRP, modulates gene expression through the mRNA-templated production of short antisense effector RNAs

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