Down-regulation of a host microRNA by a Herpesvirus saimiri noncoding RNA.
Down-regulation of a host microRNA by a Herpesvirus saimiri noncoding RNA.
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DOI:
10.1126/science.1187197
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发表时间:
2010-06-18
期刊:
影响因子:
--
通讯作者:
Steitz JA
中科院分区:
文献类型:
--
作者:
Cazalla D;Yario T;Steitz JA
T cells transformed by Herpesvirus saimiri express seven viral U-rich noncoding RNAs of unknown function called HSURs. We noted that conserved sequences in HSURs 1 and 2 constitute potential binding sites for three host-cell microRNAs (miRNAs). Coimmunoprecipitation experiments confirmed that HSURs 1 and 2 interact with the predicted miRNAs in virally transformed T cells. The abundance of one of these miRNAs, miR-27, is dramatically lowered in transformed cells, with consequent effects on the expression of miR-27 target genes. Transient knockdown and ectopic expression of HSUR 1 demonstrate that it directs degradation of mature miR-27 in a sequence-specific and binding-dependent manner. This viral strategy illustrates use of a ncRNA to manipulate host-cell gene expression via the miRNA pathway.
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