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• W2938215178 endingPage "e0215394" @default.
• W2938215178 startingPage "e0215394" @default.
• W2938215178 abstract "The oncogenic Kaposi’s sarcoma-associated herpesvirus (KSHV) has two distinct life cycles with lifelong latent/non-productive and a sporadic lytic-reactivating/productive phases in the infected immune compromised human hosts. The virus reactivates from latency in response to various chemical or environmental stimuli, which triggers the lytic cascade and leads to the expression of immediate early gene, i.e. Replication and Transcription Activator (K-RTA). K-RTA, the latent-to-lytic switch protein, activates the expression of early (E) and late (L) lytic genes by transactivating multiple viral promoters. Expression of K-RTA is shown to be sufficient and essential to switch the latent virus to enter into the lytic phase of infection. Similarly, the virus-encoded bZIP family of protein, K8 also plays an important role in viral lytic DNA replication. Although, both K-RTA and K8 are found to be the ori-Lyt binding proteins and are required for lytic DNA replication, the detailed DNA-binding profile of these proteins in the KSHV and host genomes remains uncharacterized. In this study, using chromatin immunoprecipitation combined with high-throughput sequencing (ChIP-seq) assay, we performed a comprehensive analysis of K-RTA and K8 binding sites in the KSHV and human genomes in order to identify specific DNA binding sequences/motifs. We identified two novel K-RTA binding motifs, (i.e. AGAGAGAGGA/motif RB and AGAAAAATTC/motif RV) and one K8 binding motif (i.e. AAAATGAAAA/motif KB), respectively. The binding of K-RTA/K8 proteins with these motifs and resulting transcriptional modulation of downstream genes was further confirmed by DNA electrophoretic gel mobility shift assay (EMSA), reporter promoter assay, Chromatin Immunoprecipitation (ChIP) assay and mRNA quantitation assay. Our data conclusively shows that K-RTA/K8 proteins specifically bind to these motifs on the host/viral genomes to modulate transcription of host/viral genes during KSHV lytic reactivation." @default.
• W2938215178 created "2019-04-25" @default.
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• W2938215178 date "2019-04-18" @default.
• W2938215178 modified "2023-09-23" @default.
• W2938215178 title "KSHV lytic proteins K-RTA and K8 bind to cellular and viral chromatin to modulate gene expression" @default.
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• W2938215178 doi "https://doi.org/10.1371/journal.pone.0215394" @default.
• W2938215178 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6472759" @default.
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