Elements for improved expression of bovine somatotropin
First Claim
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1. A nucleic acid sequence comprising SEQ ID NO:
- 106 operably linked to a native bovine somatotropin (bST) cDNA sequence.
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Abstract
The invention allows improved expression of heterologous polypeptides such as bovine somatotropin (bST). Novel compositions and methods are provided for production of bST from a native bST cDNA in transformed host cells such as E. coli. In particular, DNA segments comprising novel ribosome binding sites and adjacent sequences are provided, which in conjunction with a promoter sequence direct high level expression of bST from its native cDNA. The invention also provides expression constructs comprising the ribosome binding sites and methods for the use of such constructs.
1 Citation
29 Claims
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1. A nucleic acid sequence comprising SEQ ID NO:
- 106 operably linked to a native bovine somatotropin (bST) cDNA sequence.
- View Dependent Claims (2)
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3. A nucleic acid sequence comprising SEQ ID NO:
- 8 operably linked to a native bST cDNA sequence.
- View Dependent Claims (4, 23, 24, 25)
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5. A recombinant construct comprising a ribosome binding site sequence operably linked to a native bST cDNA sequence, wherein
(i) the ribosome binding site sequence contains the subsequence DDAGGDD, (ii) the central G of the subsequence is located 10 to 13 nucleotides 5′ - of the ATG start codon of the cDNA sequence, and
(iii) the 6 to 9 nucleotides between the subsequence and the ATG start codon comprise at least four nucleotides that are adenine or thymine. - View Dependent Claims (6, 7, 8, 26, 27, 28)
- of the ATG start codon of the cDNA sequence, and
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9. A recombinant construct comprising a ribosome binding site sequence at least 80% identical to SEQ ID NO:
- 106 and operably linked to a native bST cDNA sequence, wherein the last eight nucleotides at the 3′
-end of the ribosome binding site sequence comprise at least seven nucleotides that are adenine or thymine.
- 106 and operably linked to a native bST cDNA sequence, wherein the last eight nucleotides at the 3′
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10. A recombinant construct comprising a ribosome binding site sequence at least 80% identical to SEQ ID NO:
- 106 and operably linked to a native bST cDNA sequence.
- View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 29)
Specification