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The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis

ABSTRACT: We found that Keap1-Nrf2 signaling pathway mediates UBR7 to regulate HK2 expression through the modification of histone H2BK120 monoubiquitination, thereby inhibiting glycolysis and HCC tumorigenesis.

ORGANISM(S): Mus musculus

PROVIDER: GSE173454 | GEO | 2022/12/09

REPOSITORIES: GEO

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The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis [RNA-seq]

Project description:We found that Keap1-Nrf2 signaling pathway mediates UBR7 to regulate HK2 expression through the modification of histone H2BK120 monoubiquitination, thereby inhibiting glycolysis and HCC tumorigenesis.

2022-12-09 | GSE173501 | GEO

The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis

Project description:The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis

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The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis [RNA-seq]

Project description:The Keap1-Nrf2-Bach1 signaling mediates UBR7 negative regulation of HK2 to inhibit glycolysis and HCC tumorigenesis [RNA-seq]

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UBR7 is a novel E3 ubiquitin ligase for H2BK120 and acts as a tumor-suppressor in breast cancer [RNA-Seq]

Project description:Plant Homeo Domain (PHD) is a versatile chromatin reader/effector module which recognizes methylated, acetylated or unmodified histone substrates and regulates cellular gene expression programs. Although PHD domains shows selective epigenetic recognition of methylated, acetylated and unmodified histone substrates, there has been no previous report on its catalytic function regulating malignant transformation of cells. Here we report that PHD finger of UBR7 (Ubiquitin Protein Ligase E3 Component N-Recognin 7 (Putative)), in isolation or in context of full length protein, harbors E3 ubiquitin ligase activity towards monoubiquitination of histone H2B at lysine 120 . Knockdown of UBR7 in MCF10a and breast cancer cells decreased H2BK120ub both at the global levels and on specific genes. Conversely, overexpression of wild type, but not catalytic mutant, rescued H2BK120ub levels. Low UBR7 expression was associated with basal-like and triple negative breast cancers as well as showed poor expression in metastatic tumors. Consistently, UBR7 loss resulted in invasion properties, induced epithelial-to-mesenchymal transition and promoted metastasis. Conversely, ectopic expression of UBR7 reduced cell growth, invasion and tumor growth in mouse fat pad. Mechanistically, UBR7 reduced H2BK120ub gene body of cell-adhesion related genes as well as gene expression including on CDH4 gene. Importantly, rebuilding CDH4 levels rescued invasion phenotypes seen in UBR7-low cells. Collectively, our results establish that UBR7 PHD has novel H2B ubiquitin ligase activity and it suppresses tumor growth in basal-like breast cancers.

2019-02-08 | GSE93758 | GEO

UBR7 is a novel E3 ubiquitin ligase for H2BK120 and acts as a tumor-suppressor in breast cancer [ChIP-Seq]

2019-02-08 | GSE93757 | GEO

UBR7 Acts as a Chaperone for Post-Nucleosomal Histone H3

Project description:Histone chaperones modulate the stability of histones beginning from histone synthesis, through incorporation into DNA, and during recycling during transcription and replication. Following histone removal from DNA, chaperones regulate histone storage and degradation. Here we characterize UBR7 as a histone H3.1 chaperone that modulates the supply of pre-existing post-nucleosomal histone complexes. UBR7 is a largely nuclear soluble protein. We demonstrate that UBR7 binds to post-nucleosomal H3K4me3 and H3K9me3 histones via its UBR box and PHD. UBR7 binds to the non-nucleosomal histone chaperone NASP. The pool of NASP-bound post-nucleosomal histones accumulate and chromatin is depleted of H3K4me3 nucleosomes in the absence of UBR7. We propose that the interaction of UBR7, NASP, and histones opposes the histone storage functions of NASP as UBR7 promotes reincorporation of post-nucleosomal H3 complexes.

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UBR7 an E3 ligase targets Sp110 via modulating IFN beta signalling in HBV-induced hepatic carcinoma

Project description:UBR7 is an E3 ubiquitin ligase. We identified that Sp110 is a novel substrate for UBR7 which promotes HBV persistence. UBR7 ubiquitinates Sp110 which leads to downregulation of type I interferon response pathway genes. Our study reports that UBR7 ubiquitinates Sp110 thereby promoting viral persistence and HBV- induced HCC.

2023-12-31 | GSE229339 | GEO

Expression profiling of E14 cells overexpressing Hk2/Pkm2

Project description:Purpose: In this study, we compared transcriptome profiling (RNA-seq) between normal mouse embryonic stem cell (E14) and Hexokinase2 (Hk2)/ Pyruvate Kinase M2 (Pkm2) overexpressed E14 cell. Result: Using an optimized data analysis workflow, we mapped over 4 billion sequence reads per sample to the mouse genome (build mm9) and identified 28698 transcripts in 5 samples. Conclusion: Our study represents the first detailed analysis of Hk2/ Pkm2 overexpressed E14 cell transcriptomes, generated by RNA-seq technology We compared transcriptome profiling (RNA-Seq) between normal mouse embryonic stem cell (E14) and E14 cells over-expressing Hexokinase2 (Hk2)/Pyruvate Kinase M2 (Pkm2)

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Chemical Modulation of Glycolysis Regulates the KEAP1-NRF2 Pathway Through a Metabolite-Induced Posttranslational Modification

Project description:Glycolysis is a master regulator of cellular energy, synthesis and redox regulation, however the mechanisms that underlie the responses to and regulation of changing glucose metabolism are incompletely understood. The NRF2-antioxidant response element (ARE) pathway serves as a central regulator of cellular stress by sensing and eliminating 2 chemically reactive species in the cell. A phenotypic high-throughput chemical screen for novel activators of NRF2 signaling identified an inhibitor of the glycolytic enzyme PGK1. Metabolomic and proteomic profiling experiments revealed that inhibition of PGK1 results in the accumulation of central glycolytic intermediates, as well as the reactive dicarbonyl metabolite methylglyoxal (MGx). MGx selectively modifies reactive residues on KEAP1, resulting in the formation of a covalent KEAP1 homodimer, accumulation of NRF2 and activation of the NRF2 transcriptional program. Proteomic and NMR experiments verified that KEAP1 homodimerization is mediated by a novel post-translational modification, termed MICA, formed by the reaction of methylglyoxal with proximal cysteine and arginine residues. The identified PGK1 inhibitor series was found to be efficacious in a NRF2-dependent mouse model of UV-damage, demonstrating that activation of KEAP1- NRF2 signaling through this mechanism is physiologically relevant. Together, these results demonstrate the existence of direct inter-pathway communication between glycolysis and the KEAP1-NRF2 transcriptional program, which is mediated by a reactive metaboliteinduced post-translational modification (rmPTM). In addition, they provide new insight into metabolic regulation of cell stress response, and a potential therapeutic axis for controlling the cytoprotective antioxidant response in numerous human diseases.

2018-10-22 | GSE116642 | GEO

Keap1-dependent gene expression determined in the liver using conditional Keap1 knockout mice vs. genetic control mice

Project description:To compare hepatic gene expression in conditional Keap1 knockout (Alb-Cre:Keap1(flox/-)) and genetic control mice. Disruption of Keap1-mediated repression of Nrf2 signaling was expected to result in increased expression of Nrf2-regulated genes. Keywords: comparative expression profiling

2008-05-01 | GSE11287 | GEO

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