CRISPR directed evolution of the spliceosome for resistance to splicing inhibitors

Haroon Butt, Ayman Eid, Afaque Ahmad Imtiyaz Momin, Jeremie Bazin, Martin Crespi, Stefan T. Arold, Magdy M. Mahfouz

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97 Scopus citations


Increasing genetic diversity via directed evolution holds great promise to accelerate trait development and crop improvement. We developed a CRISPR/Cas-based directed evolution platform in plants to evolve the rice (Oryza sativa) SF3B1 spliceosomal protein for resistance to splicing inhibitors. SF3B1 mutant variants, termed SF3B1-GEX1A-Resistant (SGR), confer variable levels of resistance to splicing inhibitors. Studies of the structural basis of the splicing inhibitor binding to SGRs corroborate the resistance phenotype. This directed evolution platform can be used to interrogate and evolve the molecular functions of key biomolecules and to engineer crop traits for improved performance and adaptation under climate change conditions.
Original languageEnglish (US)
JournalGenome biology
Issue number1
StatePublished - Apr 30 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Acknowledgements: We would like to thank members of the genome engineering and synthetic biology laboratory at KAUST for their critical discussion and technical help in this work. Funding: This work is funded by KAUST-baseline funding to Magdy Mahfouz and Stefan Arold.


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