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In Vitro Analysis of ARGONAUTE-Mediated Target Cleavage and Translational Repression in Plants

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Plant Argonaute Proteins

Part of the book series: Methods in Molecular Biology ((MIMB,volume 1640))

Abstract

MicroRNAs (miRNAs) are endogenous small RNAs, which negatively regulate expression of complementary target genes at the post-transcriptional level. In plants, miRNAs are mainly loaded onto ARGONAUTE1 to form RNA-induced silencing complexes (RISCs), which mediate target mRNA cleavage as well as translational repression. The cell-free system derived from tobacco BY-2 protoplasts has become a powerful tool not only for the analysis of RISC assembly mechanism but also for mechanistic dissection of plant RISC functions. Here we describe the detailed protocols for the preparation of BY-2 cell lysate and the procedure to analyze the dual function of plant RISC—target cleavage and translational repression—in vitro.

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Acknowledgments

We are grateful to the members of Tomari laboratory for comments on this manuscript. This work was supported in part by Grants-in-Aid for Scientific Research on Innovative Areas (“Nascent-chain Biology”) 26116003 (to H.I.) and (“Non-coding RNA neo-taxonomy”) 26113007 (to Y.T.), Grant-in-Aid for Young Scientists (A) 16H06159 (to H.I.), and Grant-in-Aid for Challenging Exploratory Research 15K14444 (to H.I.).

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Correspondence to Hiro-oki Iwakawa .

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Tomari, Y., Iwakawa, Ho. (2017). In Vitro Analysis of ARGONAUTE-Mediated Target Cleavage and Translational Repression in Plants. In: Carbonell, A. (eds) Plant Argonaute Proteins. Methods in Molecular Biology, vol 1640. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7165-7_4

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  • DOI: https://doi.org/10.1007/978-1-4939-7165-7_4

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  • Publisher Name: Humana Press, New York, NY

  • Print ISBN: 978-1-4939-7164-0

  • Online ISBN: 978-1-4939-7165-7

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