Tethering KSRP, a decay-promoting AU-rich element-binding protein, to mRNAs elicits mRNA decay

Chu Fang Chou, Alok Mulky, Sushmit Maitra, Wei Jye Lin, Roberto Gherzi, John Kappes, Ching Yi Chen

Research output: Contribution to journalArticle


Inherently unstable mRNAs contain AU-rich elements (AREs) in their 3′ untranslated regions that act as mRNA stability determinants by interacting with ARE-binding proteins (ARE-BPs). We have destabilized two mRNAs by fusing sequence-specific RNA-binding proteins to KSRP, a decay-promoting ARE-BP, in a tethering assay. These results support a model that KSRP recruits mRNA decay machinery/factors to elicit decay. The ability of tethered KSRP to elicit mRNA decay depends on functions of known mRNA decay enzymes. By targeting the Rev response element of human immunodeficiency virus type 1 by using Rev-KSRP fusion protein, we degraded viral mRNA, resulting in a dramatic reduction of viral replication. These results provide a foundation for the development of novel therapeutic strategies to inhibit specific gene expression in patients with acquired or hereditary diseases.

Original languageEnglish
Pages (from-to)3695-3706
Number of pages12
JournalMolecular and Cellular Biology
Issue number10
Publication statusPublished - May 2006


ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cell Biology

Cite this