C - Chemistry – Metallurgy – 12 – N
Patent
C - Chemistry, Metallurgy
12
N
C12N 15/11 (2006.01) C07K 14/54 (2006.01) C12N 15/10 (2006.01) C12N 15/19 (2006.01) C12P 21/06 (2006.01)
Patent
CA 2145384
A process for the recombinant preparation in a bacterial host of the mature form of a mammalian protein or peptide of formula X-Pro-Z, which is subject to processing by endogenous bacterial aminopeptidases is provided. In the formula X-Pro-Z, X is a single N-terminal amino acid other than proline, and Z is the remaining sequence of amino acid residues of the protein or peptide. The process comprises inserting into a cell of the bacterial host an appropriate vector containing DNA coding for Met-Y-X-Pro-Z, in which Y is a natural amino acid that is specifically cleavable in vitro from X-Pro-Z by aminopeptidase and that imparts resistance to in vivo processing by endogenous bacterial aminopeptidases. The cell is then induced to express the expression product Met-Y-X-Pro-Z which is then treated with an appropriate aminopeptidase to cleave off Met and Y.
Heitzmann Markus
Movva Rao
Ramage Paul
Kirby Eades Gale Baker
Novartis Ag
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