Abstract
Double-stranded RNA (dsRNA) can suppress gene expression by inducing mRNA degradation of the homologous gene, known as RNA interference (RNAi). First, an RNase III-like dsRNA-specific endonuclease, Dicer, cleaves long dsRNA into 21- to 23-nucleotide (nt) small, interfering RNAs (siRNAs). Second, each resulting siRNA is incorporated into an RNA-induced silencing complex (RISC), which consists of eIF2C1, eIF2C2, Gemin3 (an RNA helicase), Gemin4 and other proteins. The siRNA guides the RISC to the homologous mRNA. Finally, the endoribonuclease in the RISC cleaves the targeted mRNA at the vicinity of the binding site, followed by further degradation of the mRNA by an exoribonuclease. As a result, gene silencing is established.
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Acknowledgments
The authors are grateful to Dr. Sidney Altman for providing the U6 promoter plasmid pmU6. We thank our colleagues in the Shi lab for helpful discussion. We also thank Dr. Nathan R. Wall for critically reading the manuscript and Dr. Peter Mulligan for working out the “three-fragment” ligation. G.C.S is supported by a Viral Oncology Training Grant from the NIH (T32CA09031). This work was supported by a grant from the NIH (GM53874) to YS.
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Sui, G., Shi, Y. (2005). Gene Silencing by a DNA Vector-Based RNAi Technology. In: Carmichael, G.G. (eds) RNA Silencing. Methods in Molecular Biology™, vol 309. Humana Press. https://doi.org/10.1385/1-59259-935-4:205
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DOI: https://doi.org/10.1385/1-59259-935-4:205
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