P62/SQSTM1 iCLIP in Human Huh-7 cells
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ABSTRACT:
PROVIDER: PRJEB19002 | ENA |
REPOSITORIES: ENA
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Project description:These are the results of the iCLIP experiment for p62/SQSTM1 in Human Huh-7 cells treated with DMSO. We used iCLIP method to identify the RNA targets of p62 and nucleotide positions of the p62 interaction on RNA. We used 2 replicates and 2 different antibodies against endogenous p62 to enrich protein/RNA complexes. cDNAs were tagged with iCLIP composite barcodes (e.g. NNNTTGTNN) which contain 4 sample-encoding bases (e.g. TTGT) and and 5 random bases (noted with N in NNNTTGTNN example) which serve as unique molecular identifiers to post-filter PCR duplicates. These composite barcodes are found in the read headers (after last colon ':' character) of submitted fastq files.
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Project description:p62/SQSTM1 is a ubiquitin-binding autophagy receptor and signaling protein that accumulates in premalignant liver diseases and most hepatocellular carcinomas (HCC). Although p62 was proposed to participate in formation of benign adenomas in autophagy-deficient livers, its role in HCC initiation was not explored. Here we show that p62 is necessary and sufficient for HCC induction in mice and that its high expression level in non-tumor human liver predicts rapid HCC recurrence after curative ablation. High p62 expression is needed for activation of NRF2 and mTORC1, c-Myc induction and protection of HCC-initiating cells from oxidative stress-induced death.
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Project description:p62/SQSTM1 was identified as a modulator of metastatic genes selectively enriched in melanoma in autophagy independent manner. iTRAQ quantitative proteomic approach was performed in melanoma cell lines (SK-Mel-103 and UACC-62) deficient for p62 to identify downstream effectors of p62. Similar studies were performed for ATG5, a core component of autophagy, as a reference for autophagy-associated changes in protein abundance. Additionally, melanoma cells were subjected to affinity purification (AP-MS) to identify the interactors of p62. Overall, these studies underscore a novel unexpected role of p62 regulating the stability of prometastatic factors via the interaction with RNA Binding Proteins, thus leading to the inhibition of protein translation.
2022-02-28 | PXD006650 | Pride
Project description:Transcriptional profiling of human hepatocarcinoma comparing Huh-7 and SNU-739. Two-condition experiment, normalized ratio represented by Huh-7/SNU-739. Biological replicates: 2 Huh-7 replicates, 2 SNU-739 replicates.
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Project description:Metastasis is a common cancer hallmark which however, may be acquired by tumor-type specific mechanisms. Here we identify p62/SQSTM1 as a modulator of metastatic genes selectively enriched in melanoma. Loss- and gain-of-function analyses of p62 effectors revealed FERMT2 as an indicator of poor patient prognosis. Analyses in tumor cells, clinical biopsies and genetically-engineered mice (to compare p62 vs. ATG5) demonstrated that known p62 roles in autophagy and stress responses were not essential in melanomas. Instead, a genome-wide transcriptomic/proteomic/interactomic approach demonstrated that p62 controls FERMT2 and yet additional pro-metastatic genes by modulating transcript stability. This function of p62 was exerted by recruiting RNA-binding proteins, here exemplified by IGF2BP1. These data illustrate how genetically altered cancers can coordinately fuel pro-metastatic signatures.
2018-07-05 | GSE99831 | GEO
Project description:Metastasis is a common cancer hallmark which however, may be acquired by tumor-type specific mechanisms. Here we identify p62/SQSTM1 as a modulator of metastatic genes selectively enriched in melanoma. Loss- and gain-of-function analyses of p62 effectors revealed FERMT2 as an indicator of poor patient prognosis. Analyses in tumor cells, clinical biopsies and genetically-engineered mice (to compare p62 vs. ATG5) demonstrated that known p62 roles in autophagy and stress responses were not essential in melanomas. Instead, a genome-wide transcriptomic/proteomic/interactomic approach demonstrated that p62 controls FERMT2 and yet additional pro-metastatic genes by modulating transcript stability. This function of p62 was exerted by recruiting RNA-binding proteins, here exemplified by IGF2BP1. These data illustrate how genetically altered cancers can coordinately fuel pro-metastatic signatures.
2018-07-05 | GSE99830 | GEO
Project description:Metastasis is a common cancer hallmark which however, may be acquired by tumor-type specific mechanisms. Here we identify p62/SQSTM1 as a modulator of metastatic genes selectively enriched in melanoma. Loss- and gain-of-function analyses of p62 effectors revealed FERMT2 as an indicator of poor patient prognosis. Analyses in tumor cells, clinical biopsies and genetically-engineered mice (to compare p62 vs. ATG5) demonstrated that known p62 roles in autophagy and stress responses were not essential in melanomas. Instead, a genome-wide transcriptomic/proteomic/interactomic approach demonstrated that p62 controls FERMT2 and yet additional pro-metastatic genes by modulating transcript stability. This function of p62 was exerted by recruiting RNA-binding proteins, here exemplified by IGF2BP1. These data illustrate how genetically altered cancers can coordinately fuel pro-metastatic signatures.
2018-07-05 | GSE99829 | GEO
Project description:Metastasis is a common cancer hallmark which however, may be acquired by tumor-type specific mechanisms. Here we identify p62/SQSTM1 as a modulator of metastatic genes selectively enriched in melanoma. Loss- and gain-of-function analyses of p62 effectors revealed FERMT2 as an indicator of poor patient prognosis. Analyses in tumor cells, clinical biopsies and genetically-engineered mice (to compare p62 vs. ATG5) demonstrated that known p62 roles in autophagy and stress responses were not essential in melanomas. Instead, a genome-wide transcriptomic/proteomic/interactomic approach demonstrated that p62 controls FERMT2 and yet additional pro-metastatic genes by modulating transcript stability. This function of p62 was exerted by recruiting RNA-binding proteins, here exemplified by IGF2BP1. These data illustrate how genetically altered cancers can coordinately fuel pro-metastatic signatures.
2018-07-05 | GSE99832 | GEO
Project description:Transcriptional profiling of human hepatocarcinoma comparing Huh-7 and SNU-739.
2014-04-29 | GSE57106 | GEO