Optimized plant CRISPR/CPF1 systems

Patent metadata

Field	Value
Publication number	US-12098374-B2
Application number	US-201916961303-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Jan 11, 2018
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

The present invention relates to optimized systems for the genome editing of eukaryotic cells, preferably plant cells. Also provided is a plant delivery system comprising at least one Cpf1 enzyme, or a plant optimized construct encoding the same, to be synergistically combined with a Cpf1 guide RNA system. Further provided is a Cpf1 guide RNA system being flanked by a Hammerhead ribozyme sequence at the 5′ end and by a plant-derived Hepatitis Delta Vims (HDV)-like ribozyme sequence at the 3′ end, or being embedded within a coding or non-coding region, of a sequence encoding a frame sequence. Novel plant-derived HDV-like ribozyme sequences are also provided. Further provided are methods for improved genome editing, and the use of the various systems provided herein to obtain transformed plants, plant cells, tissues, organs, or a progeny thereof, or a plant material, modified in a targeted way even at difficult to access target sites.

First claim

The invention claimed is:

1. A plant delivery system, the delivery system comprising
(a) at least one Cpf1 enzyme or an active fragment thereof, or a nucleic acid sequence encoding the same, wherein the at least one nucleic acid sequence encoding the Cpf1 enzyme or an active fragment thereof is codon-optimized for the expression in the plant or part of the plant; and
(b) at least one Cpf1 guide RNA system, or a nucleic acid sequence encoding the same, the at least one Cpf1 guide RNA system comprising at least one Cpf1 guide RNA specific for a genomic target sequence of interest in a plant or part of a plant;

wherein the at least one Cpf1 guide RNA, or the nucleic acid sequence encoding the same, is
(i) flanked by a Hammerhead ribozyme sequence at the 5′-end and by a plant-derived Hepatitis Delta Virus (HDV)-like ribozyme sequence at the 3′-end, wherein the plant-derived HDV-like ribozyme sequence, or a sequence encoding the same, is selected from any one of SEQ ID NOs: 19, 21, 25, and sequences having at least 95% identity over the whole length of any one of SEQ ID NOs: 19, 21, or 25; and is
(ii) embedded within a 3′ untranslated region (UTR) of a sequence encoding a frame sequence.

2. The plant delivery system of claim 1 , wherein the plant delivery system comprises a first nucleotide molecule comprising a nucleic acid sequence encoding the at least one Cpf1 enzyme or an active fragment thereof, and a second nucleotide molecule comprising a nucleic acid sequence encoding the at least one Cpf1 guide RNA system, wherein the first and the second molecule are provided on separate constructs.

3. The plant delivery system according to claim 2 , wherein the first nucleotide molecule and the second nucleotide molecule are delivered in a ratio selected from the group consisting of: 1.0 to 0.5; 1.0 to 01.0; 1.0 to 1.5; 1.0 to 2.0; 1.0 to 2.5; 1.0 to 3.0; 1.0 to 3.5; 1.0 to 4.0; 1.0 to 4.5; 1.0 to 5.0; 1.0 to 5.5; 1.0 to 6.0; 1.0 to 6.5; 1.0 to 7.0; 1.0 to 7.5; and 1.0 to 8.0.

4. The plant delivery system of claim 3 , wherein the at least one nucleic acid sequence encoding the Cpf1 enzyme or an active fragment thereof, and the nucleic acid sequence encoding at least one Cpf1 guide RNA system each comprise at least one promoter functional in a plant selected from SEQ ID NOs: 1 to 10, 67, and any combination thereof, and sequences having at least 95% identity when compared over the whole length of the respective sequence of any one of SEQ ID NOs: 1 to 10 or 67.

5. The plant delivery system of claim 1 , wherein the first construct comprising the first nucleotide molecule and the second construct comprising the second nucleotide molecule comprise at least one terminator functional in a plant or part of a plant.

6. The plant delivery system of claim 5 , wherein the at least one terminator is selected from SEQ ID NO: 11, SEQ ID NO: 12, and any combination thereof, and a sequence having at least 95% identity when compared over the whole length of the respective sequence of any one of SEQ ID NOs: 11 or 12.

7. The plant delivery system of claim 1 , wherein the nucleic acid sequence encoding the Cpf1 enzyme or an active fragment thereof is selected from SEQ ID NOs: 13 and 14, and sequences having at least 95% identity over the whole length of the respective sequence of SEQ ID NOs: 13 or 14.

8. The plant delivery system of claim 1 , wherein the Hammerhead ribozyme sequence, or a sequence encoding the same, is selected from SEQ ID NO: 17 and 18, and sequences having at least 95% identity over the whole length of any one of SEQ ID NOs: 17 or 18.

9. The plant delivery system of claim 1 , wherein the at least one Cpf1 guide RNA, or the nucleotide sequence encoding the same
further comprises a scaffold RNA sequence, or a sequence encoding the same, at the 5′-end
or at the 5′ and 3′ ends.

10. The plant delivery system of claim 8 , wherein the scaffold RNA sequence, or a sequence encoding the same, is selected from SEQ ID NO: 29 and 30, and sequences having at least 95% identity over the whole length of SEQ ID NO: 29 or 30.

11. The plant delivery system of claim 1 , wherein the at least one Cpf1 enzyme or an active fragment thereof, or a nucleic acid sequence encoding the same, is selected from any one of SEQ ID NOs: 13 to 16, 38 to 41, 72 to 76, and 152 to 158, and sequences having at least 95% or more sequence identity over the whole length of the respective nucleic acid sequence of SEQ ID NOs: 13, 14, 38, 39, 72, 73, 74, 75, 76, 157, or 158, and sequences having at least 95% identity over the whole length of the respective amino acid sequence of SEQ ID NOs: 15, 16, 40, 41, 152, 153, 154, 155, or 156, respectively.

12. The plant delivery system of claim 1 , wherein the at least one Cpf1 enzyme, or an active fragment thereof, or a nucleic acid sequence encoding the same, comprises at least one mutation in comparison to a wild-type sequence resulting in an altered PAM recognition, wherein the at least mutation is selected from G532R/K595R, or G532R/K538V/Y542R in comparison to the sequence of SEQ ID NO: 16.

13. The plant delivery system of claim 1 , wherein the at least one Cpf1 enzyme, or an active fragment thereof, or a nucleic acid sequence encoding the same, comprises at least one mutation in comparison to a wild-type sequence resulting in an altered PAM recognition, wherein the altered PAM recognition is a recognition of a TYCV or of a TATV PAM sequence.

14. The plant delivery system of claim 1 , wherein the at least one Cpf1 enzyme or an active fragment thereof, or a nucleic acid sequence encoding the same, and/or the at least one Cpf1 guide RNA system, or a nucleic acid sequence encoding the same, are provided as at least one vector construct, or are provided as at least one linear construct.

15. The plant delivery system of claim 1 , wherein the at least one Cpf1 guide RNA system comprises at least two guide RNAs, wherein the at least two guide RNAs are separated by a nucleotide sequence comprising direct repeats.

16. The plant delivery system of claim 1 , wherein the sequence encoding a frame sequence is selected from a sequence comprising a marker gene, including an antibiotic marker or a fluorescent marker, and a gene encoding a structural protein.

17. The plant delivery system of claim 16 , wherein the sequence encoding a frame sequence is selected from any one of SEQ ID NOs: 13 14 31, 32, 38, 39, 72, 73, 74, 75, 76, 157, and 158, and sequences having at least 95% identity over the whole length of the respective sequence of SEQ ID NOs: 13 14 31, 32, 38, 39, 72, 73, 74, 75, 76, 157, or 158.

18. A host cell comprising the plant delivery system of claim 1 .

19. A plant, or a plant cell, tissue, organ or material, or a derivative or progeny thereof, comprising the plant delivery system of claim 1 .

20. A method for modifying a genomic target sequence of interest in a plant or part of a plant, wherein the method comprises the steps of:
(a) providing at least one Cpf1 enzyme or an active fragment thereof, or a nucleic acid sequence encoding the same, wherein the at least one nucleic acid sequence encoding the Cpf1 enzyme or an active fragment thereof is codon-optimized for the expression in the plant or part of the plant; and
(b) providing at least one Cpf1 guide RNA system, or a nucleic acid sequence encoding the same, the at least one Cpf1 guide RNA system comprising at least one Cpf1 guide RNA specific for a genomic target sequence of interest in the plant or part of the plant;
wherein
(i) the at least one Cpf1 guide RNA, or the nucle

Assignees

• Kws Saat Se & Co Kgaa

Inventors

• Hummel Aaron
• Vaghchhipawala Zarir

Classifications

• C12N9/22

  Ribonucleases {[RNase]; Deoxyribonucleases [DNase]} · CPC title

• C12N2310/20

  involving clustered regularly interspaced short palindromic repeats [CRISPR] · CPC title

• A01H6/024

  Beta vulgaris [beet] · CPC title

• A01H6/4684

  Zea mays [maize] · CPC title

• C12N15/8218

  Antisense, co-suppression, viral induced gene silencing [VIGS], post-transcriptional induced gene silencing [PTGS] · CPC title