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- W3195573721 abstract "Abstract MicroRNAs (miRNAs) are small regulatory RNAs involved in virtually all biological processes. Although many of them are co-expressed from clusters, little is known regarding the impact of this organization on the regulation of their accumulation. In this study, we set to decipher a regulatory mechanism controlling the expression of the ten clustered pre-miRNAs from Kaposi's sarcoma associated herpesvirus (KSHV). We measured in vitro the efficiency of cleavage of each individual pre-miRNA by the Microprocessor and found that pre-miR-K1 and -K3 were the most efficiently cleaved pre-miRNAs. A mutational analysis showed that, in addition to producing mature miRNAs, they are also important for the optimal expression of the whole set of miRNAs. We showed that this feature depends on the presence of a canonical pre-miRNA at this location since we could functionally replace pre-miR-K1 by a heterologous pre-miRNA. Further in vitro processing analysis suggests that the two stem-loops act in cis and that the cluster is cleaved in a sequential manner. Finally, we exploited this characteristic of the cluster to inhibit the expression of the whole set of miRNAs by targeting the pre-miR-K1 with LNA-based antisense oligonucleotides in cells either expressing a synthetic construct or latently infected with KSHV." @default.
- W3195573721 created "2021-08-30" @default.
- W3195573721 creator A5014936467 @default.
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- W3195573721 date "2021-08-20" @default.
- W3195573721 modified "2023-10-16" @default.
- W3195573721 title "<i>Cis</i> regulation within a cluster of viral microRNAs" @default.
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- W3195573721 doi "https://doi.org/10.1093/nar/gkab731" @default.
- W3195573721 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8464075" @default.
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- W3195573721 hasPublicationYear "2021" @default.
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