Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

RNA sequencing of DDX23 knockdown by siRNA in ovarian cancer cells

ABSTRACT: DDX23 belongs to DEAD-box family of RNA helicases and plays crucial roles in spliceosome formation and pre-mRNA splicing. In this study, DDX23 was first identified as a key DEAD-box RNA helicase in ovarian cancer, and its overexpressed was associated with poor clinical outcomes. High expression of DDX23 was involved in the malignant proliferation and aggressiveness of ovarian cancer.

ORGANISM(S): Homo sapiens

PROVIDER: GSE181078 | GEO | 2021/07/31

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

Transcriptional profile analysis of uninfected or VSV-infected scrambled siRNA (siControl) and DDX23 knockdown (siDDX23) A549 cells

Project description:DExD/H-box helicases play essential roles in RNA metabolism, and emerging data suggest that they have additional functions in antiviral immunity across species. However, little is known about this evolutionarily conserved family in antiviral responses in lower species. Here, by isolation of poly(I:C)-binding proteins in amphioxus, an extant basal chordate, we found that DExD/H-box helicases DHX9, DHX15 and DDX23 to be responsible for cytoplasmic dsRNA detection in amphioxus. Since the antiviral roles of DDX23 have not been characterized in mammals, we performed further poly(I:C) pull down assays and found human DDX23 bind to LMW poly(I:C) through its N-terminal region, suggesting that DDX23 is an evolutionarily conserved dsRNA sensor. Knockdown of human DDX23 enhanced replication of VSV and reduced activation of the NF-κB and IRF3. Moreover, when stimulated with poly(I:C) or VSV, human DDX23 translocated from nucleus to cytoplasm and formed complexes with TRIF or MAVS to initiate downstream signaling. Collectively, this comparative immunological study not only defined DDX23 as an emerging nuclear pattern recognition receptor (PRR) for innate sensing of RNA virus, but also extended the essential role of the DExD/H helicase family in viral RNA sensing from mammals to basal chordate.

2019-06-18 | GSE132847 | GEO

MicroRNA profiling of wild type and p72 knock-out mice embryos

Project description:To examine the effect of DEAD-box RNA helicase subunits on the primary miRNAs processing by Drosha complex, we made knockout mice of p72, DEAD-box RNA helicase, a component of Drosha complex. And we compare the miRNA expression profiles derived from whole mice embryo between wild-type and p72 KO mice.

2007-04-12 | E-MEXP-1052 | biostudies-arrayexpress

MLLT10 gene recombinations in pediatric T-Acute Lymphoblastic Leukemia

Project description:MLLT10, a 24 exons gene at 10p12, is known in leukemogenesis as partner of MLL or PICALM and recently NAP1L1. We identified HNRNPH1 and DDX3X, genes involved in RNA processing, as new MLLT10 partners in 2 cases of pediatric NOTCH1 positive T-ALL. HNRNPH1/5q35 encodes for a member of the ubiquitously expressed heterogeneous nuclear ribonucleoprotein (hnRNP) subfamily of RNA binding protein. DDX3X/Xp11.3, belongs to the big family of RNA helicases with a DEAD box domain.

2013-07-03 | GSE42765 | GEO

Analysis of RIP-seq of Ded1 and eIF4A(Tif1) with and without glucose depletion

Project description:The aim of this experiment was to look at RNAs which associate with DEAD-box RNA helicases with and without 10 minutes of glucose starvation.

2021-09-30 | E-MTAB-9095 | biostudies-arrayexpress

RNA helicase HEL-1 promotes longevity by specifically activating DAF-16/FOXO transcription factor signaling in Caenorhabditis elegans

Project description:The homeostatic maintenance of the genomic DNA is crucial for regulating aging processes. However, the role of RNA homeostasis in aging processes remains unknown. RNA helicases are a large family of enzymes that regulate the biogenesis and homeostasis of RNA. However, the functional significance of RNA helicases in aging has not been explored. Here, we report that a large fraction of RNA helicases regulate the lifespan ofCaenorhabditis elegans. In particular, we show that a DEAD-box RNA helicase, helicase 1 (HEL-1), promotes longevity by specifically activating the DAF-16/forkhead box O (FOXO) transcription factor signaling pathway. We find that HEL-1 is required for the longevity conferred by reduced insulin/insulin-like growth factor 1 (IGF-1) signaling (IIS) and is sufficient for extending lifespan. We further show that the expression of HEL-1 in the intestine and neurons contributes to longevity. HEL-1 enhances the induction of a large fraction of DAF-16 target genes. Thus, the RNA helicase HEL-1 appears to promote longevity in response to decreased IIS as a transcription coregulator of DAF-16. Because HEL-1 and IIS are evolutionarily well conserved, a similar mechanism for longevity regulation via an RNA helicase-dependent regulation of FOXO signaling may operate in mammals, including humans.

2023-10-04 | GSE244493 | GEO

The Thermus thermophilus DEAD-box protein Hera is a general RNA chaperone and plays a key role in tRNA metabolism

Project description:RNA helicases catalyze the ATP-dependent destabilization of RNA duplexes. DEAD-box helicases share a helicase core that mediates ATP binding and hydrolysis, RNA binding and unwinding. Most members of this family contain domains flanking the core that can confer RNA substrate specificity and guide the helicase to a specific RNA. However, the in vivo RNA substrates of most helicase are currently not defined. The DEAD-box helicase Hera from Thermus thermophilus contains a helicase core, followed by a dimerization domain (DD) and an RNA binding domain (RBD) that folds into an RNA recognition motif (RRM). The RRM mediates high affinity binding to an RNA hairpin, and an adjacent duplex is then unwound by the helicase core. Hera is a cold-shock protein, and has been suggested to act as an RNA chaperone under cold-shock conditions. Using immunoprecipitation of Hera-RNA complexes and RNA-Seq, we show that Hera binds to a large fraction of T. thermophilus RNAs under normal-growth and cold-shock conditions without a strong sequence preference, in agreement with a structure-specific recognition of RNAs and a general function in RNA metabolism. Under cold-shock conditions, Hera is recruited to RNAs with high propensities to form stable secondary structures. We show that selected RNAs identified, including a set of tRNAs, bind to Hera in vitro, and activate the Hera helicase core. Gene ontology analysis reveals an enrichment of genes related to translation, including mRNAs of ribosomal proteins, tRNAs, tRNA ligases, and tRNA-modifying enzymes, consistent with a key role of Hera in ribosome assembly and tRNA metabolism.

2020-10-22 | GSE135435 | GEO

Genome-wide Identification of DEAD-box RNA Helicase Targets Reveals Roles for RNA Secondary Structure Remodeling in mRNA Processing (Structure-seq)

Project description:Accurate gene expression requires the coordination of RNA processing with assembly of messenger RNA-protein (mRNP) complex. RNA helicases are a class of enzymes that unwind RNA duplexes in vitro and have been are proposed to remodel RNA structure in vivo. Herein, we provide evidence that the DEAD-box protein Dbp2 remodels RNA structure to facilitate efficient pre-mRNA processing in S. cerevisiae. First, we find that Dbp2 associates with the 3’ ends and 3’ splice-sites of mRNAs genome-wide. Using structure-seq to map RNA secondary structure, we find altered secondary structures in dbp2∆ cells that overlap polyadenylation elements and correlate with inefficient termination. We also identify a role for Dbp2 in pre-mRNA splicing and show that both splicing and termination require Dbp2 helicase activity. This reveals that DEAD-box RNA helicases unwind structure in vivo and that structural alteration of pre-mRNA is essential for proper gene expression.

2019-05-01 | GSE106478 | GEO

Genome-wide Identification of DEAD-box RNA Helicase Targets Reveals Roles for RNA Secondary Structure Remodeling in mRNA Processing (iCLIP-seq)

2019-05-01 | GSE106477 | GEO

RNA helicase DDX21 coordinates transcription and noncoding RNA processing of the ribosomal pathway

Project description:DEAD-box RNA helicases are vital for the regulation of various aspects of the RNA life cycle, but the molecular underpinnings of their involvement, particularly in mammalian cells, remain poorly understood. Here we show that the DEAD-box RNA helicase DDX21 can sense transcriptional status of both RNA Pol I and Pol II to control transcriptional and post-transcriptional steps of ribosome biogenesis in human cells. We demonstrate that DDX21 widely associates with Pol I- and Pol II-transcribed genes and with diverse species of protein-coding and noncoding RNAs. Although broad, these molecular interactions, both at the chromatin and at the RNA level, exhibit a remarkable specificity for the ribosomal pathway. In the nucleolus, DDX21 occupies the transcribed rDNA locus, directly contacts both rRNA and snoRNAs and, as a functional component of the snoRNA ribonucleoprotein (snoRNP) complex, promotes modification of rRNA. In the nucleoplasm, DDX21 is incorporated into the 7SK snRNP complex, which facilitates DDX21 association with promoters of Pol II-transcribed genes encoding ribosomal proteins and snoRNAs. Promoter-bound DDX21 facilitates the release of P-TEFb from the 7SK snRNP, enhancing productive Pol II elongation. Altogether, we present a unifying mechanism for the coordinated regulation of ribosomal genes across nuclear compartments, and provide first evidence implicating a mammalian RNA helicase in RNA modification and Pol II elongation control. Examination of DDX21 chromatin association and DDX21 RNA interacting partners in HEK293 cells

2014-11-17 | E-GEOD-56802 | biostudies-arrayexpress

Genome-wide maps of double strand breaks after siRNA knockdown of DDX41 in HCT116 cells

Project description:We report the first genome-wide mapping of fragility hotspots after siRNA-mediated knockdown of the DEAD-box helicase DDX41 in HCT116 cells using sBLISS. DDX41 defficient cells display elevated levels of genomic instability. sBLISS analysis revealed that hotspots for genomic instability in the absence of DDX41 are located around the transcription start site of transcribed genes.

2021-11-17 | GSE183147 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data