Fusion proteins containing the c-terminal of tetanus toxin...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/62 (2006.01) A61K 39/02 (2006.01) C12N 9/10 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2168459

The invention provides a DNA construct comprising a DNA sequence encoding a fusion protein of the formula TetC-(Z)a-Het, wherein: TetC is the C fragment of tetanus toxin, or a protein comprising the epitopes thereof; Het is a heterologous protein, Z is an amino acid, and is zero or a positive integer, provided that (Z)a does not include the sequence Gly-Pro. The invention also provides replicable expression vectors containing the constructs, bacteria transformed with the constructs, the fusion proteins per se and vaccine compositions formed from the fusion proteins or attenuated bacteria expressing the fusion proteins.

L'invention concerne un produit de combinaison d'ADN qui comprend une séquence d'ADN codant une protéine de fusion de formule: TetC-(Z)a-Het, où TetC représente le fragment C de la toxine du tétanos ou une protéine comprenant ses épitopes; Het représente une protéine hétérologue, Z un acide aminé et a &cir& _ zéro ou un nombre entier positif, à condition que (Z)a ne comporte pas de séquence Gly-Pro. L'invention concerne aussi des vecteurs d'expression réplicables qui contiennent de tels produits de recombinaison, des bactéries transformées avec lesdits produits, les protéines de fusion per se et des compositions vaccinales formées à partir de ces protéines de fusion ou de bactéries atténuées exprimant ces protéines de fusion.

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