Chimaeric gene coding for a transit peptide and a heterologous peptide
First Claim
1. A process for achieving expression of a protein or polypeptide of interest in cells of a plant, said protein or polypeptide of interest being different from a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, said process comprising the step of:
- (1) introducing into the nuclear genome of the said plant a chimaeric DNA sequence comprising;
a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising, in sequence, a transit peptide of a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and said protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide,b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant for control of transcription of said nucleic acid sequence in said cells;
wherein said nucleic acid sequence is expressed in cells of said plant under control of said promoter, and the protein or polypeptide of interest is translocated into chloroplasts of cells of said plant.
1 Assignment
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Accused Products
Abstract
Chimaeric DNA sequence which encodes: 1) a transit peptide of a cytoplasmic precursor of a chloroplast protein or polypeptide of a plant and 2) a protein or polypeptide that is heterologous to the transit peptide. The chimaeric DNA sequence can be used as a vector for transforming a plant cell so that a chimaeric precursor of the heterologous protein or polypeptide is produced in the cytoplasm of the cell and the chimaeric precursor then transports the heterologous protein or polypeptide in vivo into a chloroplast of the cell.
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Citations
87 Claims
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1. A process for achieving expression of a protein or polypeptide of interest in cells of a plant, said protein or polypeptide of interest being different from a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, said process comprising the step of:
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(1) introducing into the nuclear genome of the said plant a chimaeric DNA sequence comprising; a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising, in sequence, a transit peptide of a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and said protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide, b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant for control of transcription of said nucleic acid sequence in said cells; wherein said nucleic acid sequence is expressed in cells of said plant under control of said promoter, and the protein or polypeptide of interest is translocated into chloroplasts of cells of said plant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 41)
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14. A process to produce a plant comprising a protein of polypeptide of interest which is part of a fusion protein and which is translocated into chloroplasts of cells of said plant, said process comprising the step of introducing into the nuclear genome of said plant a chimaeric DNA sequence comprising:
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a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising in sequence; 1) a transit peptide included in a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and, 2) a fusion protein comprising in sequence; 2.1) the N-terminal part of a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, and, 2.2) a protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide and, b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant, wherein the chimaeric DNA sequence is expressed in cells of said plant under control of said promoter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 42)
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26. A process to produce a plant comprising a protein or polypeptide of interest which is part of a fusion protein and which is translocated into chloroplasts of cells of said plant, said process comprising the step of introducing into the nuclear genome of said plant a chimaeric DNA sequence comprising:
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a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising in sequence; 1) a transit peptide included in a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and, 2) a fusion protein comprising in sequence; 2.1) a N-terminal part including no more than the first 22 N-terminal amino acids of a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, and 2.2) a protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide and, b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant, wherein the chimaeric DNA sequence is expressed in cells of said plant under control of said promoter. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 43)
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44. A process for achieving expression of a protein or polypeptide of interest in cells of a plant, said protein or polypeptide of interest being different from a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, said process comprising the step of:
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producing a plant comprising in its nuclear genome a chimaeric DNA sequence comprising; a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising, in sequence, a transit peptide of a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and said protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide, b) a promoter upstream of said nucleic acid sequence for control of transcription of said nucleic acid sequence in said cells, wherein said nucleic acid sequence is expressed in cells of said plant under control of said promoter and the protein of polypeptide of interest is translocated into chloroplasts of cells of said plant. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 85)
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57. A process to produce a plant comprising a protein or polypeptide of interest which is part of a fusion protein and which is translocated into chloroplasts of cells of said plant, said process comprising the step of producing a plant comprising in its nuclear genome a chimeric DNA sequence comprising:
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a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising in sequence; 1) a transit peptide included in a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and, 2) a fusion protein comprising in sequence; 2.1) the N-terminal part of a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, and, 2.2) a protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide and, b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant, wherein the chimaeric DNA sequence is expressed in cells of said plant under control of said promoter. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 86)
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69. A process to produce a plant comprising a protein or polypeptide of interest which is part of a fusion protein and which is translocated into chloroplasts of cells of said plant, said process comprising the step of producing a plant comprising in its nuclear genome a chimaeric DNA sequence comprising:
a) a nucleic acid sequence coding for a chimaeric protein or polypeptide comprising in sequence; 1) a transit peptide included in a cytoplasmic precursor of a chloroplast protein or chloroplast polypeptide of a plant species, and, 2) a fusion protein comprising in sequence; 2.1) a N-terminal part including no more than the first 22 N-terminal amino acids of a mature chloroplast protein or chloroplast polypeptide derived from a natural cytoplasmic precursor thereof, and - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 87)
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70. 2) a protein or polypeptide of interest which is different from said mature chloroplast protein or chloroplast polypeptide and,
b) a promoter upstream of said nucleic acid sequence recognized by polymerases endogenous to said plant, wherein the chimaeric DNA sequence is expressed in cells of said plant under control of said promoter.
Specification