IP Library › Granted Patent US 12,305,179
Granted Patent B2
US 12,305,179 · App. 17/596,110 · Granted May 20, 2025

Transgenic land plants that express a polyhydroxyalkanoate synthase seed specifically with cytosolic localization

Inventors: Meghna Malik (Saskatoon, CA); Nii Patterson (Saskatoon, CA); Jihong Tang (West Roxbury, MA); Matthew Martino (Cortland, NY); Nirmala Sharma (Saskatoon, CA); Oliver P. Peoples (Arlington, MA); Kristi D. Snell (Belmont, MA); Frank Anthony Skraly (Woburn, MA)
Assignee: NUSEED NUTRITIONAL US INC.
C12N15/8243C12N9/1029C12N15/8234C12N15/8257C07K2319/03
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Quick Facts
Patent No.
US 12,305,179
App. No.
17/596,110
Granted
May 20, 2025
Kind
B2
Abstract

A transgenic land plant that expresses a polyhydroxy alkanoate synthase seed specifically, with cytosolic localization is disclosed. The plant includes a nucleic acid encoding the polyhydroxy alkanoate synthase and a seed-specific promoter operably linked to the nucleic acid. The seed-specific promoter drives expression of the polyhydroxy alkanoate synthase in cytosol of cells of seeds of the plant. The polyhydroxy alkanoate synthase includes a catalytic domain. The polyhydroxy alkanoate synthase does not include any sequence positioned to mediate translocation of the catalytic domain across any membrane of the cells, thereby resulting in the polyhydroxy alkanoate synthase being expressed seed specifically, with cytosolic localization.

Claims (39)

1. A transgenic land plant that expresses a polyhydroxyalkanoate synthase seed specifically, with cytosolic localization, comprising:

(a) a nucleic acid encoding the polyhydroxyalkanoate synthase; and

(b) a seed-specific promoter operably linked to the nucleic acid,

wherein:

(i) the seed-specific promoter drives expression of the polyhydroxyalkanoate synthase in cytosol of cells of seeds of the transgenic land plant;

(ii) the polyhydroxyalkanoate synthase comprises a catalytic domain; and

(iii) the polyhydroxyalkanoate synthase does not comprise any sequence positioned to mediate translocation of the catalytic domain across any membrane of the cells, thereby resulting in the polyhydroxyalkanoate synthase being expressed seed specifically, with cytosolic localization; and

(iv) the polyhydroxyalkanoate synthase further comprises an endoplasmic reticulum targeting signal, the endoplasmic reticulum targeting signal being positioned to anchor the polyhydroxyalkanoate synthase to a membrane of endoplasmic reticulum of the cells with the catalytic domain remaining in the cytosol, thereby maintaining cytosolic localization of the polyhydroxyalkanoate synthase.

2. The transgenic land plant according to claim 1 , wherein the seed-specific promoter comprises one or more of a promoter from soybean oleosin isoform A gene or a promoter from soybean glycinin gene.

3. The transgenic land plant according to claim 1 , wherein the seed-specific promoter comprises one or more of a promoter from the soybean oleosin isoform A gene of SEQ ID NO: 5 or a promoter from soybean glycinin gene of SEQ ID NO: 4.

4. The transgenic land plant according to claim 1 , wherein the catalytic domain comprises a G/S-X-C-X-G-G (SEQ ID NO: 59) PhaC box consensus sequence at positions 317-322, aspartate at position 480, and histidine at position 508, with numbering of the positions relative to PhaC of Cupriavidus necator of SEQ ID NO: 32.

5. The transgenic land plant according to claim 4 , wherein:

(a) the catalytic domain further comprises proline at position 239, aspartate at position 254, serine at position 260, tryptophan at position 425, aspartate at position 428, asparagine at position 448, and glycine at position 507, with numbering of the positions relative to PhaC of Cupriavidus necator of SEQ ID NO: 32; and

(b) the catalytic domain has at least 80% or higher sequence identity to one or more of the following:

(i) Class I PhaC Cupriavidus necator of SEQ ID NO: 32 residues 201-589, Chromobacterium violaceum of SEQ ID NO: 33 residues 174-568 , Delftia acidovorans of SEQ ID NO: 34 residues 204-630, Aeromonas caviae of SEQ ID NO: 35 residues 201-594, Caulobacter vibrioides of SEQ ID NO: 36 residues 203-587, Zoogloea ramigera of SEQ ID NO: 37 residues 190-576 , Azohydromonas latus of SEQ ID NO: 38 residues 148-536, Acinetobacter sp. RA3849 of SEQ ID NO: 39 residues 206-590, Burkholderia sp. DSMZ 9242 of SEQ ID NO: 40 residues 236-625, Nocardia corallina of SEQ ID NO: 41 residues 178-561, Rhodococcus ruber of SEQ ID NO: 42 residues 176-562, or Rhodospirillum rubrum of SEQ ID NO: 43 residues 291-673;

(ii) Class II PhaC of Pseudomonas oleovorans of SEQ ID NO: 44 residues 179-559, Pseudomonas putida of SEQ ID NO: 45 residues 179-560, or Pseudomonas sp. 61-3 of SEQ ID NO: 46 residues 183-567;

(iii) Class III PhaC of Allochromatium vinosum of SEQ ID NO: 47 residues 33-355 , Thiocapsa pfennigii of SEQ ID NO: 48 residues 35-357 , Arthrospira sp. PCC 8005 of SEQ ID NO: 49 residues 46-373 , Cyanothece sp. PCC 7425 of SEQ ID NO: 50 residues 35-366, or Synechocystis sp. PCC6803 of SEQ ID NO: 51 residues 48-378; or

(iv) Class IV PhaC of Bacillus cereus of SEQ ID NO: 52 residues 35-361, Bacillus megaterium of SEQ ID NO: 53 residues 31-357, or Bacillus bataviensis of SEQ ID NO: 54 residues 31-355.

6. The transgenic land plant according to claim 1 , wherein the polyhydroxyalkanoate synthase comprises one or more of the following:

(i) Class I PhaC of Cupriavidus necator of SEQ ID NO: 32 , Chromobacterium violaceum of SEQ ID NO: 33 , Delftia acidovorans of SEQ ID NO: 34, Aeromonas caviae of SEQ ID NO: 35, Caulobacter vibrioides of SEQ ID NO: 36, Zoogloea ramigera of SEQ ID NO: 37 , Azohydromonas latus of SEQ ID NO: 38, Acinetobacter sp. RA3849 of SEQ ID NO: 39, Burkholderia sp. DSMZ 9242 of SEQ ID NO: 40, Nocardia corallina of SEQ ID NO: 41, Rhodococcus ruber of SEQ ID NO: 42, or Rhodospirillum rubrum of SEQ ID NO: 43;

(ii) Class II PhaC of Pseudomonas oleovorans of SEQ ID NO: 44, Pseudomonas putida of SEQ ID NO: 45, or Pseudomonas sp. 61-3 of SEQ ID NO: 46;

(iii) Class III PhaC of Allochromatium vinosum of SEQ ID NO: 47 , Thiocapsa pfennigii of SEQ ID NO: 48 , Arthrospira sp. PCC 8005 of SEQ ID NO: 49 , Cyanothece sp. PCC 7425 of SEQ ID NO: 50, or Synechocystis sp. PCC6803 of SEQ ID NO: 51; or

(iv) Class IV PhaC of Bacillus cereus of SEQ ID NO: 52, Bacillus megaterium of SEQ ID NO: 53, or Bacillus bataviensis of SEQ ID NO: 54.

7. The transgenic land plant according to claim 1 , wherein the polyhydroxyalkanoate synthase comprises a hybrid PhaC of Pseudomonas oleovarans/Zoogloea ramigera of SEQ ID NO: 55.

8. The transgenic land plant according to claim 1 , wherein the endoplasmic reticulum targeting signal is positioned C-terminally with respect to the catalytic domain.

9. The transgenic land plant according to claim 1 , wherein the endoplasmic reticulum targeting signal comprises an endoplasmic reticulum targeting signal of a cytochrome B5 isoform D protein.

10. The transgenic land plant according to claim 1 , wherein the endoplasmic reticulum targeting signal comprises amino acids 108-140 of cytochrome B5 isoform D protein of Arabidopsis thaliana of SEQ ID NO: 58.

11. The transgenic land plant according to claim 1 , wherein the transgenic land plant further comprises one or more of a PhaA beta-ketothiolase or an NphT7 acetoacetyl-CoA synthetase.

12. The transgenic land plant according to claim 1 , wherein the transgenic land plant further comprises a PhaB acetoacetyl-CoA reductase.

13. The transgenic land plant according to claim 1 , wherein the transgenic land plant is one or more of a Brassica species, Brassica napus, Brassica rapa, Brassica carinata, Brassica juncea, Camelina sativa , a Crambe species, a Jatropha species, pennycress, Ricinus communis , a Calendula species, a Cuphea species, Arabidopsis thaliana , maize, soybean, a Gossypium species, sunflower, palm, coconut, safflower, peanut, Sinapis alba , sugarcane, flax, or tobacco.

14. The transgenic land plant according to claim 1 , wherein the transgenic land plant further comprises seeds, and the seeds comprise the polyhydroxyalkanoate synthase and a polyhydroxyalkanoate polymerized by the polyhydroxyalkanoate synthase.

15. The transgenic land plant according to claim 14 , wherein greater than 80% of the polyhydroxyalkanoate synthase expressed in the transgenic land plant is expressed in the seeds of the transgenic land plant.

16. The transgenic land plant according to claim 14 , wherein greater than 80% of the polyhydroxyalkanoate synthase expressed in the seeds of the transgenic land plant is localized in the cytosol of the cells of the seeds.

17. The transgenic land plant according to claim 14 , wherein greater than 80% of the polyhydroxyalkanoate polymerized by the polyhydroxyalkanoate synthase is localized in the cytosol of the cells of the seeds.

18. The transgenic land plant according to claim 14 , wherein the transgenic land plant produces the polyhydroxyalkanoate in the seeds to 2.0 to 20.0% of dry seed weight.

19. The transgenic land plant according to claim 14 , wherein the polyhydroxyalkanoate comprises one or more of 3-hydroxybutyrate monomers, 4-hydroxybutyrate monomers, 3-hydroxyvalerate monomers, 3-hydroxyhexanoate monomers, 5-hydroxyvalerate monomers, or saturated 3-hydroxyacid monomers with even-numbered carbon chains ranging from C6-C16.

20. The transgenic land plant according to claim 14 , wherein the polyhydroxyalkanoate comprises 3-hydroxybutyrate monomers.

21. The transgenic land plant according to claim 14 , wherein the polyhydroxyalkanoate comprises one or more of poly-3-hydroxybutyrate, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), poly(3-hydroxybutyrate-co-3-hydroxyvalerate), poly(3-hydroxybutyrate-co-3-hydroxhexanoate) and poly(3-hydroxybutyrate-co-5-hydroxyvalerate).

22. The transgenic land plant according to claim 14 , wherein the polyhydroxyalkanoate comprises poly-3-hydroxybutyrate.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 7, 2025
From: YIELD10 BIOSCIENCE, INC.
To: NUSEED NUTRITIONAL US INC.
Reel/Frame 070757/0010 →
SECURITY INTEREST Recorded Sep 17, 2024
From: YIELD10 BIOSCIENCE, INC.
To: NUSEED NUTRITIONAL US INC.
Reel/Frame 068614/0579 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 3, 2021
From: MALIK, MEGHNA; PATTERSON, NII; TANG, JIHONG; MARTINO, MATTHEW; SHARMA, NIRMALA; PEOPLES, OLIVER P.; SNELL, KRISTI D.; SKRALY, FRANK ANTHONY
To: YIELD10 BIOSCIENCE, INC.
Reel/Frame 058300/0239 →
Continuity (2)
Provisional Application 62859244 · Jun 10, 2019
Related Publication 20220235365A1 · Jul 28, 2022
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