Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Functional screen for mediators of onco-mRNA translation specificity [II]

ABSTRACT: Oncogenic protein dosage is tightly regulated to enable cancer cells to adapt and survive. Whether this is regulated at the level of translational control and the key factors in cis and trans remain unknown. The Myc oncogene is a central paradigm of an exquisitely regulated oncogene and a major driver of pancreatic ductal adenocarcinoma (PDAC). Using a genome-wide 5’UTR CRISPRi screen in PDAC cells, we identified activators of selective MYC translation and validated four RNA binding proteins (RBPs), including epitranscriptome modifiers. Among these RBPs, RBM42 was our top hit, which is highly expressed in PDAC and predicts poor survival. Combining polysome sequencing and CLIP-seq analyses, we find that RBM42 binds and selectively regulates the translation of MYC and a precise, yet vital suite of pro-oncogenic transcripts, including JUN and EGFR. Mechanistically, employing IP-mass spectrometry analysis, we find that RMB42 is a novel ribosome-associated protein (RAP). Using DMS-Seq and mutagenesis analysis, we show that RBM42 directly binds and remodels the MYC 5’UTR RNA structure, facilitating the formation of the translation pre-initiation complex. Importantly, RBM42 is necessary for human PDAC cell growth and fitness and PDAC tumorigenesis in xenograft mouse models in a Myc-dependent manner in vivo. In PDAC patient samples, RBM42 expression is correlated with Myc protein levels and transcriptional activity. This work transforms our understanding of the translational code in cancer and offers a new therapeutic opening to target the expression of oncogenes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE279023 | GEO | 2024/11/29

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Functional screen for mediators of onco-mRNA translation specificity [DMS-seq]

Project description:Oncogenic protein dosage is tightly regulated to enable cancer cells to adapt and survive. Whether this is regulated at the level of translational control and the key factors in cis and trans remain unknown. The Myc oncogene is a central paradigm of an exquisitely regulated oncogene and a major driver of pancreatic ductal adenocarcinoma (PDAC). Using a genome-wide 5’UTR CRISPRi screen in PDAC cells, we identified activators of selective MYC translation and validated four RNA binding proteins (RBPs), including epitranscriptome modifiers. Among these RBPs, RBM42 was our top hit, which is highly expressed in PDAC and predicts poor survival. Combining polysome sequencing and CLIP-seq analyses, we find that RBM42 binds and selectively regulates the translation of MYC and a precise, yet vital suite of pro-oncogenic transcripts, including JUN and EGFR. Mechanistically, employing IP-mass spectrometry analysis, we find that RMB42 is a novel ribosome-associated protein (RAP). Using DMS-Seq and mutagenesis analysis, we show that RBM42 directly binds and remodels the MYC 5’UTR RNA structure, facilitating the formation of the translation pre-initiation complex. Importantly, RBM42 is necessary for human PDAC cell growth and fitness and PDAC tumorigenesis in xenograft mouse models in a Myc-dependent manner in vivo. In PDAC patient samples, RBM42 expression is correlated with Myc protein levels and transcriptional activity. This work transforms our understanding of the translational code in cancer and offers a new therapeutic opening to target the expression of oncogenes.

2024-11-29 | GSE255740 | GEO

Functional screen for mediators of onco-mRNA translation specificity [CLIP-seq]

2024-11-29 | GSE255703 | GEO

Functional screen for mediators of onco-mRNA translation specificity [polysome-seq]

2024-11-29 | GSE255702 | GEO

Functional screen for mediators of onco-mRNA translation specificity

2024-11-29 | GSE255533 | GEO

MYC dependent mRNA translation shapes gene expression and cell biology

Project description:We report that MYC controls the translation of specific mRNAs in a sequence and RNA binding protein dependent manner. Specifically, using transcriptome-scale ribosome footprinting we identify 882 mRNAs whose translation depends on MYC. These mRNAs are highly significantly enriched for specific 5ÕUTR sequence motifs that bind the SRSF1/RBM42/HNRNPK complex. For example, MYC and SRFSF1/RBM42 dependent transcripts include many components of the electron transport chain and directly affect cellular respiration. Our results provide an integrated map of MYC driven gene expression programs that includes MYCÕs ability to control mRNA translation.

2019-04-30 | GSE79864 | GEO

A super-enhancer regulated RNA-binding protein cascade drives pancreatic cancer

Project description:Pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy in need of new therapeutic options. Using an unbiased analysis of super-enhancers (SEs) as sentinels of core genes involved in cell-specific function, we uncover a druggable SE-mediated RNA-binding protein (RBP) cascade that supports PDAC growth through enhanced mRNA translation. This cascade is driven by a SE associated with the RBP heterogeneous nuclear ribonucleoprotein F, which stabilizes protein arginine methyltransferase 1 (PRMT1) to, in turn, control the translational mediator ubiquitin-associated protein 2-like. All three of these genes and the regulatory SE are essential for PDAC growth and coordinately regulated by the Myc oncogene. In line with this, modulation of the RBP network by PRMT1 inhibition reveals a unique vulnerability in Myc-high PDAC patient organoids and markedly reduces tumor growth in vivo. Our study highlights a functional link between epigenetic regulation and mRNA translation and identifies components that comprise unexpected therapeutic targets for PDAC.

2023-06-15 | PXD030423 | Pride

Global analysis of RNA-binding proteins identifies a positive feedback loop between LARP1 and MYC that promotes tumorigenesis

Project description:In addition to genomic alterations, aberrant changes in post-transcriptional regulation can modify gene function and drive cancer development. RNA-binding proteins (RBPs) are a large class of post-transcriptional regulators that have been increasingly implicated in carcinogenesis. By integrating multi-omics data, we identify LARP1 as one of the most upregulated RBPs in colorectal cancer (CRC), and demonstrate its oncogenic properties. We perform LARP1:RNA interactome profiling and unveil a previously unexplored role for LARP1 in targeting the 3′UTR of oncogenes in CRC. Notably, we identify the proto-oncogenic transcription factor MYC as a key LARP1-regulated target. Our data show that LARP1 positively modulates MYC expression by associating with its 3′UTR. In addition, antisense oligonucleotide-mediated blocking of the interaction between LARP1 and the MYC 3′UTR reduces MYC expression and in vitro CRC growth. Furthermore, a systematic analysis of LARP1:protein interactions reveals IGF2BP3 and YBX1 as LARP1-interacting proteins that also regulate MYC expression and CRC development. Finally, we demonstrate that MYC reciprocally modulates LARP1 expression by targeting its enhancer. In summary, our data reveal a critical, previously uncharacterized role of LARP1 in promoting CRC tumorigenesis, validate its direct regulation of the proto-oncogene MYC, and delineate a model of the positive feedback loop between MYC and LARP1 that promotes CRC growth and development.

2022-03-10 | PXD030215 | Pride

Sequential regulation of maternal mRNAs through a conserved cis-acting element in their 3’UTRs [I]

Project description:Maternal mRNAs are synthesized during oogenesis to initiate the development of future generations. Some maternal mRNAs are determinants of somatic or germline fate and must be translationally repressed until embryogenesis. However, the translational repressors themselves are also temporally regulated. We use polar granule component (pgc), a Drosophila maternal mRNA, as a model system to ask how maternal mRNAs are repressed while the regulatory landscape is continually shifting. pgc, a potent transcriptional silencer and germline determinant, is translationally regulated throughout oogenesis. We find that the 3’UTR of pgc mRNA contains a conserved ten-nucleotide sequence that is bound by different conserved RNA binding proteins (RBPs) at different stages of oogenesis to continuously repress translation except for a brief expression in the stem cell daughter. Pumilio (Pum) binds to this sequence in undifferentiated and early differentiating oocytes and recruits other temporally restricted translational regulators to block pgc translation. After differentiation, Pum levels diminish and Bruno (Bru) levels increase, allowing Bru to bind the same 3’UTR sequence and take over translational repression of pgc mRNA. We have identified a class of maternal mRNAs regulated during oogenesis by both Pum and Bru, including Zelda, activator of the zygotic genome, which contain this core 10-nt regulatory sequence. Our data suggests that this hand off mechanism is more generally utilized to inhibit translation of maternal mRNAs during oogenesis.

2018-09-05 | GSE119456 | GEO

Sequential regulation of maternal mRNAs through a conserved cis-acting element in their 3’UTRs [II]

2018-09-05 | GSE119457 | GEO

A dual role of RBM42 in modulating splicing and translation of CDKN1A/p21 during DNA damage response

Project description:p53-mediated cell cycle arrest during DNA damage is dependent on the induction of p21 protein, encoded by the CDKN1A gene. p21 inhibits cyclin-dependent kinases required for cell cycle progression to guarantee accurate repair of DNA lesions. Hence, fine-tuning of p21 levels is crucial to preserve genomic stability. Currently, the multilayered regulation of p21 levels during DNA damage is not fully understood. Herein, we identified the human RNA binding motif protein 42 (RBM42) as a novel regulator of p21 levels during DNA damage. Genome-wide transcriptome and interactome analysis revealed that RBM42 alters the expression of p53-regulated genes during DNA damage. Specifically, we demonstrated that RBM42 facilitates CDKN1A splicing by counteracting the splicing inhibitory effect of RBM4 protein. Unexpectedly, we also show that RBM42, underpins translation of various splicing targets, including CDKN1A. Concordantly, transcriptome-wide mapping of RBM42-RNA interactions using eCLIP further substantiates the dual function of RBM42 in regulating splicing and translation of its target genes, including CDKN1A. Collectively, our data show that RBM42 couples splicing and translation machineries to fine-tune gene expression during DNA damage response.

2023-11-03 | GSE245744 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

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