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The E3 ubiquitin ligase RNF112 inhibits bladder cancer progression by attenuating lipid synthesis through the degradation of c-Myc

ABSTRACT: The E3 ubiquitin ligase RNF112 inhibits bladder cancer progression by attenuating lipid synthesis through the degradation of c-Myc

PROVIDER: PRJNA1125326 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29452535_1.fastq.gz	Fastqsanger.gz
	SRR29452535_2.fastq.gz	Fastqsanger.gz
	SRR29452536_1.fastq.gz	Fastqsanger.gz
	SRR29452536_2.fastq.gz	Fastqsanger.gz
	SRR29452537_1.fastq.gz	Fastqsanger.gz

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The E3 ubiquitin ligase RNF112 inhibits bladder cancer progression by attenuating lipid synthesis through the degradation of c-Myc

Project description:The E3 ubiquitin ligase RNF112 exhibits significant downregulation in bladder cancer, correlating with disease progression and unfavorable prognosis. Experimental evidence from in vitro and in vivo studies indicates that RNF112 suppresses bladder cancer proliferation, migration, and lipid synthesis. Mechanistically, RNF112 interacts directly with the MBII domain of MYC through its N-terminal zinc finger motif. The catalytic site C97 of RNF112 facilitates K48-linked polyubiquitination of the K389 residue on the c-Myc protein, accelerating its degradation. The restoration of c-Myc expression has been shown to mitigate the inhibitory impacts of RNF112 on the growth, migration, and lipid synthesis of bladder cancer cells. Additionally, our research validates the interaction of c-Myc with the ACLY promoter, leading to an enhancement of its transcriptional activity. RNF112 exerts its inhibitory effects on lipid synthesis in bladder cancer through the regulation of c-Myc. In conclusion, RNF112 suppresses the proliferation, migration, and lipid synthesis of bladder cancer cells by facilitating the ubiquitin-mediated degradation of c-Myc.

2025-04-01 | GSE270143 | GEO

Regulation of metablism by mitochondrial MUL1 E3 ubiquitin ligase

Project description:Regulation of metablism by mitochondrial MUL1 E3 ubiquitin ligase

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The E3 Ubiquitin Ligase AFF1 targets ARF19 to the proteasome

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E3 ubiquitin ligase Rfwd2 inactivation effect on embryonic lung development

Project description:Transcriptome analysis by RNA-seq of lungs from control and Rfwd2 epithelial-specific conditional knockout mice at embryonic 13.5 day age. RFWD2, is an E3 ubiquitin ligase that modifies specific target proteins, priming their degradation via the ubiquitin proteasome system. Rfwd2 deficiency led to a striking halt in branching morphogenesis shortly after secondary branch formation. In the mutant lung, two ETS transcript factors essential for normal lung branching, ETV4 and ETV5, were upregulated at the protein, but not transcript level. Introduction of Etv loss-of-function alleles into the Rfwd2 mutant background attenuated the branching phenotype, suggesting that RFWD2 functions at least in part through degrading ETV proteins. As a number of E3 ligases are known to target factors important for lung development, our findings provides a preview of a protein-level regulatory network essential for lung branching morphogenesis.

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The E3 ubiquitin ligase Siah1 regulates adrenal gland organization and hyperaldosteronism

Project description:Primary and secondary hypertension are major risk factors for cardiovascular disease. Elevated secretion of aldosterone resulting from primary aldosteronism (PA) is a key driver of secondary hypertension. Here, we identify an unexpected role for the ubiquitin ligase Siah1 in adrenal gland development and PA. Siah1a-/- mice exhibit altered adrenal gland morphology, as reflected by dysregulated zonation of the glomerulosa, increased aldosterone levels and aldosterone target gene expression, and reduced plasma potassium levels. Genes involved in catecholamine biosynthesis and cAMP signaling are upregulated in the adrenal glands of Siah1a-/- mice, while genes related to retinoic acid signaling and cholesterol biosynthesis are downregulated. Loss of Siah1 leads to increased expression of PIAS1, an E3 SUMO-protein ligase implicated in the suppression of LXR. Notably, SIAH1 sequence variants which impaired SIAH1 ubiquitin ligase activity, resulting in elevated PIAS1 expression, were identified in patients with PA. The involvement of Siah1–PIAS1 in adrenal gland organization and function points to a possible new therapeutic target for hyperaldosteronism.

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EGFR is a target of the tumor suppressor E3-ligase FBXW7

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The E3 ubiquitin ligase Siah2 contributes to castration-resistant prostate cancer by regulation of androgen receptor transcriptional activity

Project description:Analysis of gene expression altered upon knockdown of Siah2 in prosate cancer cells. The objective is to elucidate which signaling pathways or transcription factors are regulated by the E3 ubiquitin ligase Siah2 in human prostate cancer cells. CWR22Rv1 cells were in fected with pLKO.1 control or Siah2 shRNA, and selected with 1ug/ml of puromycin to get stable transfectants. Total RNA was extracted for micorarray analysis to compare the diffentially expressed genes between pLKO.1 control and Siah2 knockdown cells.

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The E3 ubiquitin ligase Siah2 contributes to castration-resistant prostate cancer by regulation of androgen receptor transcriptional activity

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Merlin/NF2 Suppresses Tumorigenesis by Inhibiting the E3 Ubiquitin Ligase CRL4DCAF1 in the Nucleus

Project description:Current models imply that the FERM domain protein Merlin, encoded by the tumor suppressor NF2, inhibits mitogenic signaling at or near the plasma membrane. Here, we show that the closed, growth inhibitory form of Merlin accumulates in the nucleus, binds to the E3 ubiquitin ligase CRL4DCAF1, and suppresses its activity. Depletion of DCAF1 blocks the promitogenic effect of inactivation of Merlin. Conversely, enforced expression of a Merlin-insensitive mutant of DCAF1 counteracts the antimitogenic effect of Merlin. Re-expression of Merlin and silencing of DCAF1 induce a similar, tumor-suppressive program of gene expression. Tumor-derived mutations invariably disrupt Merlinâs ability to interact with or inhibit CRL4DCAF1. Finally, depletion of DCAF1 inhibits the hyperproliferation of Schwannoma cells from NF2 patients and suppresses the oncogenic potential of Merlin-deficient tumor cell lines. We propose that Merlin suppresses tumorigenesis by translocating to the nucleus to inhibit CRL4DCAF1. To examine if Merlin controls gene expression through inhibition of CRL4DCAF1, and define the general function of this ligase, we compared the gene expression program activated by expression of Merlin or by depletion of DCAF1 in Merlin-null FC-1801 mouse Schwannoma cells

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