Method to increase protein production in culture

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/00 (2006.01) C12N 15/00 (2006.01) C12N 15/63 (2006.01) C12P 21/06 (2006.01) C12Q 1/68 (2006.01) G01N 33/567 (2006.01)

Patent

CA 2528418

A new recombinant protein production methodology has been discovered for expression of genes of interest. This should be useful for low or poorly expressing genes and in cellular production of high levels of proteins when such high levels may be detrimental or stressful to cells. Isolated polynucleotides encoding a spliced form XBP-l, ATF6, and eIF2.alpha. S51A are disclosed. Expression vectors comprising these polynucleotides are useful in increasing the specific cellular productivity in a cell expressing a polypeptide of interest by augmenting the unfolded protein response in a cell. Finally, methods to increase specific cellular productivity in mammalian cells using the above mentioned polynucleotides are also disclosed.

L'invention porte: sur une nouvelle méthode de production de protéines par recombinaison en vue de l'expression de gènes d'intérêt, utile pour l'obtention de gènes à basse ou faible expression, et pour la production, dans des cellules, de niveaux élevés de protéines alors que de tels niveaux sont néfastes ou générateurs de stress pour les cellules; et sur des polynucléotides isolés codant pour une forme épicée du XBP-l, ATF6, et du eIF2a S51A. Les vecteurs d'expression comprenant ces polynucléotides servent à accroître la production spécifique de cellules par une cellule exprimant un polypeptide d'intérêt en augmentant la réponse des protéines non pliées dans une cellule. L'invention porte finalement sur des procédés d'accroissement de la production de cellules spécifiques chez les mammifères recourant aux susdits polynucléotides.

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