Recombinant obese (ob) proteins
First Claim
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1. An expression vector comprising:
- a) a promoter sequence, andb) a DNA sequence encoding a fusion protein, which fusion protein comprises the murine ob protein of SEQ ID NO;
3 or the human ob protein of SEQ ID NO;
6, and the signal peptide for the outer membrane protein A of E. coli,which expression vector is capable of expressing the fusion protein in Escherichia coli host cells.
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Abstract
Proteins which modulate body weight of animals and humans for the treatment, prevention and control of obesity and associated diseases or conditions, and the recombinant expression of these biologically active proteins in purified and homogeneous forms.
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Citations
7 Claims
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1. An expression vector comprising:
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a) a promoter sequence, and b) a DNA sequence encoding a fusion protein, which fusion protein comprises the murine ob protein of SEQ ID NO;
3 or the human ob protein of SEQ ID NO;
6, and the signal peptide for the outer membrane protein A of E. coli,which expression vector is capable of expressing the fusion protein in Escherichia coli host cells. - View Dependent Claims (2, 6)
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3. A DNA sequence comprising a first and second part, wherein:
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(a) the first part is the sOmpA gene sequence of SEQ ID NO;
7 encoding the sOmpA peptide; and(b) the second part is the nucleotide sequence encoding the murine ob protein or the nucleotide sequence encoding the human ob protein. - View Dependent Claims (4, 5)
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7. A method of producing biologically active recombinant human or murine obese protein free of other mammalian proteins comprising the steps of:
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a) constructing an expression vector having a promoter sequence, and a DNA sequence encoding a fusion protein, which fusion protein comprises SEQ ID NO;
3 or SEQ ID NO;
6, and the signal peptide for the outer membrane protein A of E. coli;b) inserting the expression vector into an E. coli host cell to transform the E. coli host cell; c) expressing the fusion protein in the E. coli host cell; and d) treating the E. coli host cell with cold osmotic shock buffer to liberate the murine or human ob protein free of other mammalian proteins and free of the signal peptide.
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Specification