Methods and dna expression systems for over-expression of...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/62 (2006.01) C07K 14/00 (2006.01) C07K 14/495 (2006.01) C12N 9/90 (2006.01) C12N 15/67 (2006.01) C12N 15/70 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2159079

Disclosed are recombinant DNA vectors and methods for high levels of expression of proteins in bacterial host cells. The vectors contain a first gene encoding a protein product of interest, optionally as a fusion protein with ubiquitin, and a second gene encoding a cytoplasmic peptidyl-prolyl cis-trans isomerase. Co-expression of the two genes affords high levels of expression of the protein of interest, in some cases also increasing the degreee of solubility of the protein product.

L'invention concerne des vecteurs d'ADN recombiné et des méthodes pour l'expression à des niveaux élevés de protéines dans des cellules bactériennes hôtes. Les vecteurs contiennent un premier gêne codant un produit protéique d'intérêt, éventuellement une protéine de fusion contenant de l'ubiquitine, et un deuxième gène codant une isomérase peptilyl-prolyl cis-trans cytoplasmique. La co-expression des deux gènes permet l'expression à des niveaux élevés de la protéine d'intérêt, et, dans certains cas, augmente le degré de solubilité du produit protéique.

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