Trans-sialidases obtained from trypanosoma congolense

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/54 (2006.01) A23L 1/29 (2006.01) A61K 35/00 (2006.01) A61K 38/45 (2006.01) A61K 39/005 (2006.01) A61K 48/00 (2006.01) A61P 29/00 (2006.01) A61P 31/00 (2006.01) A61P 33/00 (2006.01) A61P 37/02 (2006.01) C07H 21/00 (2006.01) C12N 1/21 (2006.01) C12N 5/00 (2006.01) C12N 5/10 (2006.01) C12N 9/10 (2006.01) C12N 15/09 (2006.01) C12N 15/63 (2006.01) C12P 19/00 (2006.01) C12P 21/00 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2509070

The invention relates to novel enzymes, which transfer sialic acid from a donor molecule onto an acceptor molecule (trans-sialidases). The enzymes are isolated from the protozoan Trypanosoma congolense. The invention also relates to functional equivalents of said enzymes, to the nucleic acid sequences and amino acid sequences that code for the enzymes and their functional equivalents, to expression constructs and vectors that contain said sequences, to recombinant microorganisms that carry the inventive coding nucleic-acid sequences, to a method for the recombinant production of the inventive enzymes, to a method for isolating said enzyme from Trypanosoma congolense, to a method for the enzymatic sialization of acceptor molecules using the inventive enzymes, to effectors of the inventive trans-sialidases, to the use of the nucleic acid sequences, amino acid sequences, enzymes, effectors or sialization products for producing vaccines, medicaments, foodstuffs or food additives, in addition to the latter products obtained by the inventive method.

L'invention se rapporte à de nouvelles enzymes qui transfèrent des acides sialiques, d'une molécule donneuse sur une molécule réceptrice (trans-sialidases). Ces enzymes sont isolées dans le protozoaire Trypanosoma congolense. Cette invention concerne en outre : des équivalents fonctionnels de ces enzymes ; les séquences d'acides nucléiques et les séquences d'acides aminés codant ces enzymes et leurs équivalents fonctionnels ; des constructions d'expression et des vecteurs contenant ces séquences ; des micro-organimes recombinés comportant une séquence d'acides nucléiques de codage selon l'invention ; un procédé de production des enzymes selon l'invention, par recombinaison ; un procédé pour isoler les enzymes selon l'invention dans le protozoaire Trypanosoma congolense ; un procédé de sialylation enzymatique de molécules réceptrices, au moyen des enzymes selon l'invention ; des effecteurs des trans-sialidases selon l'invention ; l'utilisation des séquences d'acides nucléiques, séquences d'acides aminés, enzymes, effecteurs ou produits de sialylation selon l'invention pour produire des vaccins, médicaments, produits alimentaires ou compléments alimentaires ; ainsi que les agents produits selon l'invention.

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