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Lieberman SE, Gueorguieva G, Gill BK, Litvak L, Gallegos Cruz A, Lyons JB, Cho M, Karavolias N. Transporter editing in cassava indicates local production of cyanogenic glucosides in, and export from, cassava roots. Plant Biotechnol J 2024; 22:790-792. [PMID: 38073233 PMCID: PMC10955482 DOI: 10.1111/pbi.14257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/20/2023] [Accepted: 11/20/2023] [Indexed: 03/22/2024]
Affiliation(s)
| | | | - Baljeet K. Gill
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
| | - Lillian Litvak
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
| | - Ana Gallegos Cruz
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
| | - Jessica B. Lyons
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
- Department of Molecular & Cell BiologyUniversity of California, BerkeleyBerkeleyCAUSA
| | - Myeong‐Je Cho
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
| | - Nicholas Karavolias
- Innovative Genomics InstituteUniversity of California, BerkeleyBerkeleyCAUSA
- Plant and Microbial BiologyUniversity of California, BerkeleyBerkeleyCAUSA
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Gomez MA, Berkoff KC, Gill BK, Iavarone AT, Lieberman SE, Ma JM, Schultink A, Karavolias NG, Wyman SK, Chauhan RD, Taylor NJ, Staskawicz BJ, Cho MJ, Rokhsar DS, Lyons JB. CRISPR-Cas9-mediated knockout of CYP79D1 and CYP79D2 in cassava attenuates toxic cyanogen production. Front Plant Sci 2023; 13:1079254. [PMID: 37007603 PMCID: PMC10064795 DOI: 10.3389/fpls.2022.1079254] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/21/2022] [Indexed: 05/31/2023]
Abstract
Cassava (Manihot esculenta) is a starchy root crop that supports over a billion people in tropical and subtropical regions of the world. This staple, however, produces the neurotoxin cyanide and requires processing for safe consumption. Excessive consumption of insufficiently processed cassava, in combination with protein-poor diets, can have neurodegenerative impacts. This problem is further exacerbated by drought conditions which increase this toxin in the plant. To reduce cyanide levels in cassava, we used CRISPR-mediated mutagenesis to disrupt the cytochrome P450 genes CYP79D1 and CYP79D2 whose protein products catalyze the first step in cyanogenic glucoside biosynthesis. Knockout of both genes eliminated cyanide in leaves and storage roots of cassava accession 60444; the West African, farmer-preferred cultivar TME 419; and the improved variety TMS 91/02324. Although knockout of CYP79D2 alone resulted in significant reduction of cyanide, mutagenesis of CYP79D1 did not, indicating these paralogs have diverged in their function. The congruence of results across accessions indicates that our approach could readily be extended to other preferred or improved cultivars. This work demonstrates cassava genome editing for enhanced food safety and reduced processing burden, against the backdrop of a changing climate.
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Affiliation(s)
- Michael A. Gomez
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Kodiak C. Berkoff
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Baljeet K. Gill
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Anthony T. Iavarone
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, United States
| | - Samantha E. Lieberman
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Jessica M. Ma
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Alex Schultink
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Nicholas G. Karavolias
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Stacia K. Wyman
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | | | - Nigel J. Taylor
- Donald Danforth Plant Science Center, St. Louis, MO, United States
| | - Brian J. Staskawicz
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Myeong-Je Cho
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Daniel S. Rokhsar
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
- Chan-Zuckerberg BioHub, San Francisco, CA, United States
| | - Jessica B. Lyons
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
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