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Seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

ABSTRACT: Seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

PROVIDER: PRJNA836567 | ENA |

REPOSITORIES: ENA

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ATAC-seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

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RNA-seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

Project description:RNA-seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

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RNA-seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

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ATAC-seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

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Seq datasets from differentiating iHA-Foxk1 and Foxk1 KO mESCs in mesodermal conditions

Project description:This SuperSeries is composed of the SubSeries listed below.

2023-05-08 | GSE202563 | GEO

Comparative transcriptomic analysis of WT, FOXK1/2 KO, DKO cells and FOXK1 KO cells with reconstitution of several FOXK1 mutants

Project description:The goal of this study was to apply Next Generation Sequencing analyses to identify genes and pathways regulated by the FOXK1 and FOXK2 transcription factor in HeLa cells and to see whether reconstitution of FOXK1 WT and mutants can rescue the altered gene regulation in FOXK1 KO cells. Gene Ontology (GO) analysis did not uncover any dysregulated DNA damage–related pathways upon FOXKs KO. We found that cells reconstituted with any of the three FOXK1 mutants could largely rescue dysregulated gene expression in FOXK1 KO cells, similar to cells reconstituted with WT FOXK1. These suggesting that FOXK1's role in DNA damage response is not by direct transcriptional regulation of DNA damage related pathways and all the three FOXK1 mutants could not affect transcription.

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O-GlcNAcylation of FOXK1 orchestrates the E2F pathway

Project description:Gene transcription is a highly regulated process, and deregulation of transcription factors activity underlie numerous pathologies including cancer. FOXK1 and FOXK2 (FOXK1/2) transcription factors have recently emerged as important regulators of cell metabolism, autophagy and cell differentiation. While FOXK1/2 possesses many overlapping functions in normal biology, their specific functions as well as deregulation of their transcriptional activity in cancer is less clear and often contradictory. FOXK1, but less FOXK2, is known to have oncogenic properties as higher expression levels of FOXK1 has been observed in several cancers and is correlated with tumor progression, invasion, and metastasis. However, the molecular mechanism by which FOXK1 exert its oncogenic properties in caner remains unknown. Here we show that elevated expression of FOXK1, but not FOXK2, in normal human fibroblasts promotes transcription of E2F target genes associated with increased proliferation and delayed senescence entry. Fibroblasts overexpressing FOXK1 are also more prone to cellular transformation with minimal oncogenic combinations, suggesting important oncogenic proprieties of FOXK1. Mechanistically, we found that FOXK1, but not FOXK2, is specifically modified by O-GlcNAcylation. FOXK1 O-GlcNAcylation is modulated during the cell cycle and its highest levels coincides with the G1/S phase transition. Moreover, FOXK1 O-GlcNAcylation is increased following cell transformation and loss of this modification leads to decreased FOXK1 ability to promote cellular transformation and tumor growth. Cells overexpressing FOXK1 O-GlcNAcylation-defective mutants have lower E2F1 expression, cell proliferation, and tumour growth. Our results define a distinct role of FOXK1 via O-GlcNAcylation in controlling the cell cycle through the orchestration of the E2F pathway.

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Project description:Autophagy is the primary catabolic process triggered in response to starvation. Although autophagic regulation within the cytosolic compartment is well established, it is becoming clear that nuclear events also regulate the induction or repression of autophagy. Nevertheless, a thorough understanding of the mechanisms by which sequence-specific transcription factors modulate expression of genes required for autophagy is lacking. Here, we identify Foxk proteins (Foxk1 and Foxk2) as transcriptional repressors of autophagy in muscle cells and fibroblasts. Interestingly, Foxk1/2 serve to counter-balance another forkhead transcription factor, Foxo3, which induces an overlapping set of autophagic and atrophic targets in muscle. Foxk1/2 specifically recruits Sin3A-HDAC complexes to restrict acetylation of histone H4 and expression of critical autophagy genes. Remarkably, mTOR promotes the transcriptional activity of Foxk1 by facilitating nuclear entry to specifically limit basal levels of autophagy in nutrient-rich conditions. Our study highlights an ancient, conserved mechanism whereby nutritional status is interpreted by mTOR to restrict autophagy by repressing essential autophagy genes via Foxk-Sin3-mediated transcriptional control. Examination of (1) chromatin binding of Foxk1 and Sin3A in non-starved myoblasts and (2) gene expression profiling upon either starvation or siRNA-mediated depletion of Foxk1 relative to a non-starved control.

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Expression data from lateral and paraxial mesodermal cells differentiated from mouse Embryonic Stem Cells

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2021-07-07 | GSE156238 | GEO

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