Method to increase protein production in culture

摘要

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-1, ATF6, and eIF2alpha 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.