Production of foreign polypeptides in plants as viral coat...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/62 (2006.01) A01H 5/00 (2006.01) A61K 39/00 (2006.01) C07H 21/00 (2006.01) C07K 14/08 (2006.01) C07K 14/445 (2006.01) C12N 5/14 (2006.01) C12N 7/01 (2006.01) C12N 15/40 (2006.01) C12N 15/82 (2006.01) C12N 15/83 (2006.01)

Patent

CA 2402302

The present invention relates to foreign peptide sequences fused to the amino- terminal of plant viral structural proteins and a method of their production. Fusion proteins are economically synthesized in plants at high levels by biologically contained tobamoviruses. The foreign peptide sequences can be cleaved from the fusion proteins by proteolytic enzymes or chemical reagents. The foreign peptide sequences of the invention have many uses. Such uses include use as antigens for inducing the production of antibodies having desired binding properties, e.g., protective antibodies, for use as vaccine antigens for the induction of protective immunity, including immunity against parasitic infections, for use as a protein involved in hormonal activity, or for use as a protein involved in immunoregulatory activity.

L'invention concerne des séquences peptidiques étrangères hybridées avec la fraction N-terminale de protéines structurales de plantes, ainsi qu'un procédé permettant de produire ces hybrides. Ces protéines hybrides sont synthétisées dans des plantes de manière économique et en grandes quantités, par des tobamovirus dans des enceintes de confinement biologique. Les séquences peptidiques étrangères peuvent être séparées par clivage des protéines hybrides par des enzymes protéolytiques ou des réactifs chimiques. Ces séquences peptidiques étrangères ont de nombreuses applications. Elle peuvent notamment être utilisées en tant qu'antigènes pour stimuler la production d'anticorps présentant des caractéristiques de liaison recherchées, p. ex. des anticorps protecteurs, en tant qu'antigènes vaccinaux permettant d'induire une immunité protectrice, notamment une immunité contre des infections parasitaires, en tant que protéine intervenant dans l'activité hormonale ou en tant que protéine intervenant dans l'activité immunorégulatrice.

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