| Literature DB >> 20385090 |
Han Wu1, Shuying Sun, Kang Tu, Yuan Gao, Bin Xie, Adrian R Krainer, Jun Zhu.
Abstract
Both splicing factors and microRNAs are important regulatory molecules that play key roles in posttranscriptional gene regulation. By miRNA deep sequencing, we identified 40 miRNAs that are differentially expressed upon ectopic overexpression of the splicing factor SF2/ASF. Here we show that SF2/ASF and one of its upregulated microRNAs (miR-7) can form a negative feedback loop: SF2/ASF promotes miR-7 maturation, and mature miR-7 in turn targets the 3'UTR of SF2/ASF to repress its translation. Enhanced microRNA expression is mediated by direct interaction between SF2/ASF and the primary miR-7 transcript to facilitate Drosha cleavage and is independent of SF2/ASF's function in splicing. Other miRNAs, including miR-221 and miR-222, may also be regulated by SF2/ASF through a similar mechanism. These results underscore a function of SF2/ASF in pri-miRNA processing and highlight the potential coordination between splicing control and miRNA-mediated gene repression in gene regulatory networks. 2010 Elsevier Inc. All rights reserved.Entities:
Mesh:
Substances:
Year: 2010 PMID: 20385090 PMCID: PMC3395997 DOI: 10.1016/j.molcel.2010.02.021
Source DB: PubMed Journal: Mol Cell ISSN: 1097-2765 Impact factor: 17.970