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Calcineurin promotes myogenic gene expression

ABSTRACT: Calcineurin promotes myogenic gene expression

PROVIDER: PRJNA517941 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8508280.fastq.gz	Fastqsanger.gz
	SRR8508290.fastq.gz	Fastqsanger.gz
	SRR8508300.fastq.gz	Fastqsanger.gz
	SRR8508310.fastq.gz	Fastqsanger.gz
	SRR8508281.fastq.gz	Fastqsanger.gz

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Calcineurin promotes myogenic gene expression

Project description:We identified four major temporal patterns of Calcineurin (Cn)-dependent gene expression in differentiating myoblasts and determined that Cn is broadly required for the activation of the myogenic gene expression program. Cn promotes gene expression through direct binding to myogenic promoter sequences and facilitating the binding of BRG1 and other SWI/SNF subunit proteins as well as the binding of MyoD, a critical lineage determinant for skeletal muscle differentiation. We conclude that the Cn phosphatase directly impacts the expression of myogenic genes by promoting ATP-dependent chromatin remodeling and formation of transcription-competent promoters.

2019-08-06 | GSE125914 | GEO

Dynamics of calcineurin-regulated gene expression in S. cerevisiae

Project description:Gene expression was quantified in crz1 delete S. cerevisae cells over a time course following calcineurin activation by CaCl2. Cells were pretreated with buffer or the calcineurin inhibitor FK506 to allow the identification of calcineurin-regulated genes. A strain with a calcineurin-resistant mutation in the transcription factor Hcm1 was also examined. We show that calcineurin activation leads to downregulation of a many clusters of cell cycle-regulated genes, including those expressed at the G1/S and G2/M transitions.

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Ca2+/calcineurin/CRZ1 dependent gene expression in Magnaporthe oryzae

Project description:The Ca2+/calcineurin signaling pathway is a central conduit regulating growth, development, and virulence of fungal pathogens infecting plants and human. We have analyzed global gene expression profiles during Ca2+ treatment in the rice blast fungus, Magnaporthe oryzae. An immunosuppressive drug, FK506, and the knock-out mutant of a transcription factor, MoCRZ1, were included to analyze calcineurin- and/or CRZ1-dependent gene expression, respectively. About 1,400 genes were up or down regulated by Ca2+ treatment, while about 200 genes seemed to be up-regulated in a calcineurin/CRZ1-dependent manner.

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Project description:Gene expression was quantified in crz1 hog1 delete S. cerevisae cells over a time course following calcineurin activation by CaCl2. Cells were pretreated with buffer or the calcineurin inhibitor FK506 to allow the identification of calcineurin-regulated genes. We show that calcineurin-dependent downregulation of G1/S genes is partly dependent on the osmostress-activated kinase Hog1.

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RNA-seq profiling of rexinoid responsive gene expression during early myogenic differentiation

Project description:While skeletal myogenesis is tightly coordinated by myogenic regulatory factors including MyoD and myogenin, chromatin modifications have emerged as vital mechanisms of myogenic regulation. We have previously established that bexarotene, a clinically approved agonist of retinoid X receptor, promotes the specification and differentiation of skeletal muscle lineage. Here, we examine a genome-wide impact of rexinoids on myogenic differentiation through integral RNA-seq and ChIP-seq analyses. We found that bexarotene promotes myoblast differentiation through the coordination of exit from the cell cycle and the activation of muscle-related genes. We uncovered a new mechanism of rexinoid action which is mediated by the nuclear receptor and largely reconciled through a direct regulation of MyoD gene expression. In addition, we determined a rexinoid-responsive residue-specific histone acetylation at a distinct chromatin state associated to MyoD and myogenin. Thus, we provide novel molecular insights into the interplay between retinoid X receptor signaling and chromatin states pertinent to myogenic programs in early myoblast differentiation.

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Project description:In Saccharomyces cerevisiae, the Ca2+/calmodulin-dependent protein phosphatase, calcineurin, is activated by specific environmental conditions, including exposure to Ca2+ and Na+, and induces gene expression by regulating the Crz1p/Tcn1p transcription factor. We used DNA microarrays to perform a comprehensive analysis of calcineurin/Crz1p-dependent gene expression following addition of Ca2+ (200 mM) or Na+ (0.8 M) to yeast. 163 genes exhibited increased expression that was reduced 50% or more by calcineurin inhibition. These calcineurin dependent genes function in signaling pathways, ion/small molecule transport, cell wall maintenance, vesicular transport, and include many open reading frames of heretofore-unknown function. Three distinct gene classes were defined: 28 genes displayed calcineurin-dependent induction in response to Ca2+ and Na+, 125 showed calcineurin-dependent expression following Ca2+ but not Na+ addition, and 10 were regulated by calcineurin in response to Na+ but not Ca2+. Analysis of crz1D cells established Crz1p as the major effecter of calcineurin-regulated gene expression in yeast. We identified the Crz1p binding site as 5-GNGGC(G/T)CA-3 by in vitro site selection. A similar sequence, 5-GAGGCTG-3, was identified as a common sequence motif in the upstream regions of calcineurin/Crz1p-dependent genes. This finding is consistent with direct regulation of these genes by Crz1p. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set

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Identification of calcineurin-dependent, Crz1-independent gene expression changes in response to chronic CaCl2 stress

Project description:Gene expression was quantified in S. cerevisae cells over a time course of three days of CaCl2 treatment to activate calcineurin. crz1 and crz1 cnb1 mutant strains were compared to allow the identification of calcineurin-dependent gene expression changes that are independent of the downstream transcription factor Crz1. We show that mitochondrial genes are downregulated in both geneotypes over time. Additionally, genes that promote glutathione biosynthesis are upregulated in cells that express calcineurin.

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