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BET inhibitors suppress lytic DNA replication [Akata-Zta DNA-seq]

ABSTRACT: BET inhibitors suppress lytic DNA replication [Akata-Zta DNA-seq]

OTHER RELATED OMICS DATASETS IN: GSE84209GSE84212GSE84213GSE84210GSE84214GSE84211GSE98772GSE98773

PROVIDER: PRJNA328410 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR3822450.fastq.gz	Fastqsanger.gz
	SRR3822460.fastq.gz	Fastqsanger.gz
	SRR3822470.fastq.gz	Fastqsanger.gz
	SRR3822451.fastq.gz	Fastqsanger.gz
	SRR3822461.fastq.gz	Fastqsanger.gz

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BET inhibitors suppress lytic DNA replication [Akata-Zta RNA-seq]

Project description:BET inhibitors suppress lytic DNA replication [Akata-Zta RNA-seq]

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BET inhibitors suppress lytic DNA replication [Akata-Zta DNA-seq]

Project description:Lytic infection by the Epstein-Barr virus (EBV) poses numerous health risks, such as infectious mononucleosis and lymphoproliferative disorder. We demonstrate that JQ1 and other BET inhibitors block two different steps in the sequential cascade of the EBV life cycle: expression of the immediate-early gene BZLF1 and lytic genome replication. This represents a novel mode of action for antiviral drugs that may increase efficacy and decrease emergence of resistance. The sequenced total DNA data below show that JQ1 and I-BET cause a decrease in EBV genome replication after induction.

2017-06-30 | GSE84212 | GEO

BET inhibitors suppress lytic DNA replication [Akata-Zta RNA-seq]

Project description:Lytic infection by the Epstein-Barr virus (EBV) poses numerous health risks, such as infectious mononucleosis and lymphoproliferative disorder. We demonstrate that JQ1 and other BET inhibitors block two different steps in the sequential cascade of the EBV life cycle: expression of the immediate-early gene BZLF1 and lytic genome replication. This represents a novel mode of action for antiviral drugs that may increase efficacy and decrease emergence of resistance. The RNA-seq data below show that the second block causes a decrease in expression of late but not early lytic genes.

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JQ1 prevents BRD4 recruitment to the lytic origins of replication [Akata-Zta DNA-seq]

Project description:JQ1 prevents BRD4 recruitment to the lytic origins of replication [Akata-Zta DNA-seq]

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JQ1 prevents BRD4 recruitment to the lytic origins of replication [Akata-Zta Brd4 ChIP-seq]

Project description:JQ1 prevents BRD4 recruitment to the lytic origins of replication [Akata-Zta Brd4 ChIP-seq]

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JQ1 prevents BRD4 recruitment to the lytic origins of replication [Akata-Zta DNA-seq]

Project description:Lytic infection by the Epstein-Barr virus (EBV) poses numerous health risks, such as infectious mononucleosis and lymphoproliferative disorder. We demonstrate that JQ1 and other BET inhibitors block two different steps in the sequential cascade of the EBV life cycle: expression of the immediate-early gene BZLF1 and lytic genome replication. This represents a novel mode of action for antiviral drugs that may increase efficacy and decrease emergence of resistance. The ChIP-seq data below show that the BET proteins bind to both EBV lytic origins of replication.

2017-06-30 | GSE98772 | GEO

¬¬Identifying the cellular interactome of Epstein-Barr virus lytic regulator Zta reveals cellular targets contributing to viral replication.

Project description:The human gamma herpesvirus Epstein-Barr virus, infects most adults and is an important contributor to the development of many types of cancer. Essential contributions of viral genes to replication are known but the potential contributions of cell genes to viral replication are less well delineated. A key player is the viral protein Zta (BZLF1, ZEBRA, Z). This sequence-specific DNA-binding protein can disrupt viral latency by driving the transcription of target genes and by interacting with the EBV lytic origin of replication. Here we used an unbiased approach to identify the Zta-interactome in cells derived from a Burkitt’s lymphoma. Isolating Zta and associated proteins from Burkitt’s lymphoma cells undergoing EBV replication, followed by Tandem Mass Tag (TMT) mass spectrometry resulted in the identification of forty-four viral and cellular proteins in the Zta interactome. Of these two were known targets of Zta. The association of Zta with Hsc70 and the contribution that Hsc70 plays to EBV replication mirrors a contribution from HSP70 family members to the replication of other herpesviruses. Conversely, the association of Zta with NFATc2 has no known parallels for other herpesviruses. Zta attenuates the activity of an NFAT-dependent promoter, which shows a potential for dampening the expression of genes regulated by calcium-dependent signal transduction. Indeed, Zta has the ability to affect a feed-back loop limiting its own expression, which would aid viral replication by preventing the toxic effects of Zta overexpression.

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Binding site identification for the Epstein-Barr virus transcription factor Zta in epithelial cells

Project description:Epstein-Barr virus (EBV) is present in a state of latency in infected memory B-cells and EBV-associated lymphoid and epithelial cancers. Cell stimulation or differentiation of infected B-cells and epithelial cells induces reactivation to the lytic replication cycle. In each cell type, the EBV transcription and replication factor Zta (BZLF1, EB1) plays a role in mediating the lytic cycle of EBV. Zta is a transcription factor that interacts directly with Zta response elements (ZREs) within viral and cellular genomes. Here we undertake chromatin-precipitation coupled to DNA-sequencing (ChIP-Seq) of Zta-associated DNA from cancer-derived epithelial cells. The analysis identified over 14,000 Zta-binding sites in the cellular genome. We assessed the impact of lytic cycle reactivation on changes in gene expression for a panel of Zta-associated cellular genes. Finally, we compared the Zta-binding sites identified in this study with those previously identified in B-cells and reveal substantial conservation in genes associated with Zta-binding sites.

2021-02-20 | GSE83354 | GEO

Replacing C189 in the bZIP domain of Zta to S, T, V, and A changes DNA binding specificity to four types of double-stranded DNA (mC)

Project description:Zta is a bZIP transcription factor (TF) in the Epstein-Barr virus that binds unmethylated and methylated DNA sequences. Substitution of cysteine 189 of Zta to serine (Zta(C189S)) results in a virus that is unable to execute the lytic cycle which was attributed to a change in binding to methylated DNA sequences. To learn more about the role of this position in defining sequence-specific DNA binding, we mutated cysteine 189 to four other amino acids producing Zta(C189S), Zta(C189T), Zta(C189A), and Zta(C189V) mutants. Zta and mutants were used in protein binding microarray (PBM) experiments to evaluate sequence-specific DNA binding to four types of double-stranded DNA (dsDNA): 1) with cytosine in both strands (DNA(C|C)), 2) with 5-methylcytosine (5mC) in one strand and cytosine in the second strand (DNA(5mC|C)), 3) with 5-hydroxymethylcytosine (5hmC) in one strand and cytosine in the second strand (DNA(5hmC|C)), and 4) with both cytosines in all CG dinucleotides containing 5mC (DNA(5mCG)). Zta(C189S) and Zta(C189T) bound the TRE (AP-1) motif (TGAG/CTCA) more strongly than wild-type Zta, while binding to other sequences, including the C/EBP half site GCAA was reduced. Binding of Zta(C189S) and Zta(C189T) to DNA containing modified cytosines (DNA(5mC|C), DNA(5hmC|C), and DNA(5mCG)) was reduced compared to Zta. Zta(C189A) and Zta(C189V) had higher non-specific binding to all four types of DNA. Our data suggests that position C189 in Zta impacts sequence-specific binding to DNA containing modified and unmodified cytosine.

2018-05-14 | GSE108272 | GEO

Replacing C189 in the bZIP domain of Zta to S, T, V, and A changes DNA binding specificity to four types of double-stranded DNA (mCG)

2018-05-14 | GSE108273 | GEO