FAD2 performance loci and corresponding target site specific binding proteins capable of inducing targeted breaks

• US 10,577,616 B2
• Filed: 04/02/2018
• Issued: 03/03/2020
• Est. Priority Date: 09/07/2012
• Status: Active Grant

• Current Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Cogan, Noel, Forster, John, Hayden, Matthew, Sawbridge, Tim, Spangenberg, German, Webb, Steven R., Gupta, Manju, Ainley, W. Michael, Henry, Matthew J., Miller, Jeffrey C., Guschin, Dmitry Y.
• Primary Examiner(s): Keogh, Matthew R
• Application Number:
  US15/943,106
• Publication Number:
  US 20180223297A1
• Time in Patent Office: 701 Days
• Field of Search: None
• CPC Class Codes: A01H 5/10 Seeds
• CPC Class Codes: A01H 6/542 Glycine max [soybean]
• CPC Class Codes: C12N 15/102 Mutagenizing nucleic acids
• CPC Class Codes: C12N 15/8216 Methods for controlling, regulating or enhancing expression of transgenes in plant cells
• CPC Class Codes: C12N 15/8247 involving modified lipid metabolism, e.g. seed oil composition
• CPC Class Codes: C12N 15/902 using homologous recombination
• CPC Class Codes: C12N 9/22 Ribonucleases RNAses, DNAses catalytic nucleic acids C12N15/113
• CPC Class Codes: C12Y 301/00 Hydrolases acting on ester bonds (3.1)
• CPC Class Codes: Y02A 40/146 Genetically Modified [GMO] plants, e.g. transgenic plants

Abstract

A method of gene editing or gene stacking within a FAD2 loci by cleaving, in a site directed manner, a location in a FAD2 gene in a cell, to generate a break in the FAD2 gene and then ligating into the break a nucleic acid molecule associated with one or more traits of interest is disclosed.

Claims

1. A method of cleaving a FAD2 loci in a Brassica spp plant cell, the method comprising:

introducing a nuclease comprising a DNA-binding domain and a cleavage domain or cleavage half-domain into the cell, wherein the DNA-binding domain binds to a target site within any of SEQ ID Nos;

17-26, 28-33 or 35-38 in the FAD2 loci and the nuclease cleaves the FAD2 loci.

2. The method according to claim 1, further comprising integrating a nucleic acid of interest into the cleaved FAD2 loci.

3. The method according to claim 1, wherein the FAD2 loci is a FAD2A, FAD2A′

, FAD2C and/or FAD2C′

gene.

4. The method according to claim 1, wherein the DNA-binding domain is selected from the group consisting of a meganuclease DNA-binding domain, a leucine zipper DNA-binding domain, a transcription activator-like (TAL) DNA-binding domain, a RNA-guided CRISPR-Cas9, a recombinase, a zinc finger protein DNA-binding domain, and chimeric combinations of any of the foregoing.

5. The method according to claim 1, wherein the cleavage domain or cleavage half-domain is selected from the group consisting of a cleavage half-domain from a type IIS restriction endonuclease, a cleavage half-domain from FokI endonuclease, a cleavage half-domain from StsI endonuclease, and a homing endonuclease.

6. The method according to claim 1, wherein the nuclease is a zinc finger nuclease.

7. The method according to claim 6, wherein the zinc finger nuclease comprises five or six zinc finger domains ordered finger 1 to finger 5 or finger 1 to finger 6, each zinc finger domain comprising a recognition helix region, wherein the zinc finger protein comprises the recognition helix regions ordered and shown in a single row of Table 4.

8. The method according to claim 1, wherein the cleaving is specific for some but not all copies FAD2A, FAD2A′

, FAD2C and/or FAD2C′

.

9. The method according to claim 1, wherein the plant cell is a monocot plant cell or a dicot plant cell.

10. The method according to claim 1, wherein the plant cell is from Brassica rapa;

Brassica juencea;

Brassica oleracea;

or Brassica nigra.

11. The method according to claim 1, wherein the cleavage is a double strand break.

12. The method according to claim 2, wherein the nucleic acid of interest encodes a protein.

13. The method according to claim 12, wherein the nucleic acid sequence of interest is selected from the group consisting of insecticidal resistance genes, herbicide tolerance genes, nitrogen use efficiency genes, water use efficiency genes, nutritional quality genes, DNA binding genes, and selectable marker genes.

14. The method according to claim 2, wherein the nucleic acid of interest comprises a DNA-binding domain binding site.

15. The method according to claim 1, wherein the nuclease is introduced into the cell as a polynucleotide encoding the nuclease.