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Transcriptome-wide identification of transcripts regulated by PHF5A in colorectal cancer cells

ABSTRACT: Transcriptome-wide identification of transcripts regulated by PHF5A in colorectal cancer cells

PROVIDER: PRJNA746339 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15127666_1.fastq.gz	Fastqsanger.gz
	SRR15127666_2.fastq.gz	Fastqsanger.gz
	SRR15127667_1.fastq.gz	Fastqsanger.gz
	SRR15127667_2.fastq.gz	Fastqsanger.gz
	SRR15127668_1.fastq.gz	Fastqsanger.gz

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Transcriptome-wide identification of transcripts regulated by PHF5A in colorectal cancer cells

Project description:Dysregulated alternative splicing (AS) plays critical roles in driving cancer progression, and the underlying mechanisms remain largely unknown. Here we demonstrated that PHF5A, a component of U2 snRNPs, was frequently upregulated in colorectal cancer (CRC) samples and associated with poor prognosis. PHF5A promoted proliferation and metastasis of CRC cells in vitro and in vivo. Transcriptomic analysis identified PHF5A-regulated AS targets and pathways. Particularly, PHF5A induced TEAD2 exon 2 inclusion to activate YAP signaling, and interference of TEAD2-L partially reversed the PHF5A-mediated tumor progression. Pharmacological inhibition of PHF5A using pladienolide B had potent antitumor activity. Collectively, these data revealed the oncogenic role of PHF5A in CRC through regulating AS, and established PHF5A as potential therapeutic target.

2021-07-16 | GSE180042 | GEO

Acetylation of spliceosome protein PHF5A modulates stress responses and colorectal carcinogenesis through alternative splicing mediated upregulation of KDM3A

Project description:The process utilized by cancer cells for adapting to cellular stress is a key point for carcinogenesis. Alternative pre-mRNA splicing induced post-transcriptional gene expression regulation is one of the pathways for tumors maintaining proliferation rates accompanying the malignant phenotype under stress. However, the protein post-translational modification, especially protein acetylation on pre-mRNA splicing processes under stress is unknown. Here, we uncovered a list of hyperacetylated proteins in the context of acutely reduced Acetyl-CoA levels under nutrient starvation. PHD finger-like domain-containing protein 5A (PHF5A/SF3b14b), a component of U2 snRNPs, can be acetylated at lysine 29 in response to multiple cellular stresses. P300 and HDAC6 regulate PHF5A acetylation levels. PHF5A acetylation strengthens the interaction among U2 snRNPs, and affects global pre-mRNA splicing pattern and extensive gene expression. PHF5A hyperacetylation induced alternative splicing stabilizes KDM3A mRNA and promotes its protein expression. Pathologically, PHF5A K29 hyperacetylation and KDM3A upregulation axis are correlated with poor prognosis of colon cancer patients. Our findings uncovered a novel mechanism of anti-stress pathway that acetylation on PHF5A promotes the cancer cells capacity for stress resistance and consequently contributes to colon carcinogenesis.

2018-11-22 | GSE122761 | GEO

Nascent transript profiling upon in mouse embryonic stem cells under control conditions or Phf5a knockdown

Project description:Phf5a regulates transcription elongation in mouse embryonic stem cells (ESCs), through regulation of the Paf1 complex. In this study we assayed nascent RNA profiling using global run-on sequncing in mouse ESCs under conditions of self-renewal, differentiation and Phf5a knockdown. These results revealed that genes positively regulated by Paf1 in ESCs exibit RNA elongation pausing on their promoters. We used conditions of self-renewal, differentiation, Phf5a knockdown and Paf1 knockdown to monitor nascent transcript expression changes during Phf5a depletion using global run-on RNA sequencing (GRO-seq). These results revealed that Phf5a through the control of Paf1 complex regulates pause release and elongation of pluripoency-associated genes in embryonic stem cells.

2016-08-31 | GSE73441 | GEO

PHF5A coordinates p300 for epigenetic regulation of lipogenesis to promote hepatocellular carcinoma progression

Project description:PHD-finger protein 5A (PHF5A) is a component of U2snRNP, which plays a critical role in mRNA splicing for recognizing the branch site. However, whether it also plays other functions independent of RNA splicing remains elusive. Here, we find that expression levels of PHF5A are significantly upregulated in hepatocellular carcinoma (HCC). Down-regulation of PHF5A restrains liver cancer cell proliferation in vitro and in vivo. RNA-sequencing analysis reveals that fatty-acid biosynthetic enzymes are major downstream targets of PHF5A in HCC. Through metabolomics analysis, we find that inhibition of PHF5A reduces free fatty acid and phospholipid synthesis, further suppressing plasma membrane function. Mechanistically, PHF5A acts as a transcription co-factor of the p300 acetyltransferase for the H3K27 acetylation (Ac) and promotes H3K27Ac-dependent lipogenic genes expression. Our findings demonstrated a surprising splicing-independent role of PHF5A in transcriptional regulation of lipid metabolism for HCC progression and provided a new strategy for HCC therapy by blocking the interaction of PHF5A and p300.

2021-10-01 | GSE167023 | GEO

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Project description:AHR regulated genes in Colorectal Cancer

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Project description:TSS identification of Rap1-regulated transcripts by 5' end RNA sequencing

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Project description:Phf5a regulates transcription elongation in mouse embryonic stem cells (ESCs), through regulation of the Paf1 complex. In this study we assayed gene expression profiling using RNA-sequncing in mouse ESCs under conditions of self-renewal, Phf5a knockdown and Paf1 knockdown. These results revealed that Phf5a and Paf1 regulate similar gene expression signatures in mouse ESCs.

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