Abstract
Besides genome editing, the CRISPR-Cas9-based platform provides a new way of engineering artificial transcription factors (ATFs). Multiplex of guide RNA (gRNA) expression cassettes holds a great promise for many useful applications of CRISPR-Cas9. In this chapter, we provide a detailed protocol for building advanced multiplexed CRISPR-dCas9-Activator/repressor T-DNA vectors for carrying out transcriptional activation or repression experiments in plants. We specifically describe the assembly of multiplex T-DNA vectors that can express multiple gRNAs to activate a silenced gene, or to repress two independent miRNA genes simultaneously in Arabidopsis. We then describe a “higher-order” vector assembly method for increased multiplexing capacity. This higher-order assembly method in principle allows swift stacking of gRNAs cassettes that are only limited by the loading capacity of a cloning or expression vector.
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Acknowledgments
This work is supported by a Collaborative Funding Grant from North Carolina Biotechnology Center and Syngenta (2016-CFG-8003) to Y.Q.
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Lowder, L.G., Malzahn, A., Qi, Y. (2018). Plant Gene Regulation Using Multiplex CRISPR-dCas9 Artificial Transcription Factors. In: Lagrimini, L. (eds) Maize. Methods in Molecular Biology, vol 1676. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7315-6_12
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DOI: https://doi.org/10.1007/978-1-4939-7315-6_12
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