Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA351889 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR4734800.fastq.gz | Fastqsanger.gz | |||
| SRR4734801.fastq.gz | Fastqsanger.gz | |||
| SRR4734802.fastq.gz | Fastqsanger.gz | |||
| SRR4734799.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 4 of 4 |
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Project description:The cellular response to genotoxic stress is a well-characterized network of DNA surveillance pathways. The contribution of posttranscriptional gene regulatory networks to the DNA damage response (DDR) has not been extensively studied. Here, we systematically identified RNA-binding proteins differentially interacting with polyadenylated transcripts upon exposure of human breast carcinoma cells to ionizing irradiation (IR). Interestingly, more than 260 proteins showed increased binding to poly(A) RNA in IR-exposed cells and were comprised of many nucleolar proteins. The functional analysis of DDX54, a candidate genotoxic stress responsive RNA helicase, revealed that DDX54 is an immediate-to-early DDR regulator required for the splicing efficacy of its target IR-induced pre-mRNAs. Upon IR exposure, DDX54 acts by increased interaction with a well defined class of pre-mRNAs which harbor introns with weak acceptor splice sites, as well as by protein-protein contacts within components of U2 snRNP and spliceosomal B complex, resulting in lower intron retention and higher processing rates of its target transcripts. Since DDX54 promotes survival after exposure to IR its expression and/or mutation rate may impact DDR-related pathologies. Our work indicates the relevance of many uncharacterized RBPs potentially involved in the DDR.
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