Hcv e2 construct compositions and methods

C - Chemistry – Metallurgy – 12 – N

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C12N 15/85 (2006.01) A61K 39/29 (2006.01) A61P 37/04 (2006.01) C07K 14/18 (2006.01) C07K 16/10 (2006.01) C12N 15/00 (2006.01) G01N 33/564 (2006.01)

Patent

CA 2722423

A construct comprising the ectodomain of the Hepatitis C Virus (HCV) E2 sequence and a mammalian expression system therefor is disclosed. The construct comprises a CMV promoter, prolactin signal sequence, the ectodomain of HCV E2 se-quence truncated at aa 664, a thrombin cleavage site and a human Fc domain. The method also relates to an expression system for the construct, which is stably expressed in human embryonic kidney cells 293T. Continuous protein expression in a bioreactor al-lows for 4 mg of purified protein per liter of cell supernatant.

L'invention porte sur un produit de construction qui comporte l'ectodomaine de la séquence E2 du virus de l'Hépatite C (VHC) et sur un système d'expression de mammifère pour le produit de construction. Plus particulièrement, l'invention porte sur un produit de construction qui comporte le promoteur du CMV, une séquence signal de la prolactine, l'ectodomaine de la séquence E2 du VHC tronquée au niveau de l'acide aminé 664, un site de clivage de la thrombine et le domaine Fc humain. L'invention porte également sur un système d'expression pour le produit de construction, qui est exprimé de façon stable dans des cellules de rein embryonnaires humaines 293T. L'expression continue de protéine dans un bioréacteur permet 4 mg de protéine purifiée par litre de surnageant cellulaire.

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