A CHLOROPLAST OR ACCUMULATED LIPID PARTICLE ENRICHED WITH AN OIL-BODY PROTEIN FUSION POLYPEPTIDE AND METHOD FOR PRODUCING THE SAME IN ALGAE
First Claim
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1. A method of producing a recombinant polypeptide in an algal cell, the method comprising:
- growing algal cells comprising a recombinant polypeptide under homeostatic conditions to target the recombinant polypeptide to the algal chloroplast;
wherein the recombinant polypeptide is a fusion polypeptide comprising an oleosin protein or fragment thereof and a protein of interest;
and isolating the recombinant protein.
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Abstract
The present invention relates to recombinant protein production in algal cells. In particular, the present invention provides methods for making recombinant polypeptides in association with accumulated lipid particles or chloroplasts. The methods involve producing the recombinant polypeptide as a fusion polypeptide with an oil body protein and the growth of the algal cells under non-homeostatic conditions to form accumulated lipid particles within the algal cells, wherein the algal lipid particles contain the fusion polypeptide.
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Citations
42 Claims
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1. A method of producing a recombinant polypeptide in an algal cell, the method comprising:
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growing algal cells comprising a recombinant polypeptide under homeostatic conditions to target the recombinant polypeptide to the algal chloroplast;
wherein the recombinant polypeptide is a fusion polypeptide comprising an oleosin protein or fragment thereof and a protein of interest;and isolating the recombinant protein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 15, 16)
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9-10. -10. (canceled)
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12-14. -14. (canceled)
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17. (canceled)
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18. A method of producing algal chloroplasts enriched for recombinant polypeptide, the method comprising:
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(a) introducing a nucleic acid into algal cells, the nucleic acid comprising as operably linked components (i) a nucleic acid encoding a fusion polypeptide comprising an oleosin protein or fragment thereof to provide targeting to the algal chloroplast and a polypeptide of interest; and (ii) a nucleic acid sequence capable of controlling expression in an algal cell; (b) subjecting the algal cells in a growth medium to homeostatic conditions to target the fusion polypeptide to the algal chloroplast; and (c) optionally isolating the algal chloroplasts.
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19-30. -30. (canceled)
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31. A method for producing accumulated lipid particles, the method comprising:
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(a) introducing a nucleic acid into algal cells, the nucleic acid comprising as operably linked components a nucleic acid encoding a fusion polypeptide comprising an oleosin protein or fragment thereof to provide targeting to the algal chloroplast and a polypeptide of interest; and a nucleic acid sequence capable of controlling expression in an algal cell; (b) subjecting the algal cell to non-homeostatic conditions to form accumulated lipid particles within the algal cell and optionally isolating the accumulated lipid particles. - View Dependent Claims (32, 33, 36, 37, 38, 40, 41)
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34-35. -35. (canceled)
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39. (canceled)
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42-47. -47. (canceled)
Specification