Mobilization of viral genomes from t-dna using site-specific...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/83 (2006.01) A01H 4/00 (2006.01) C12N 5/10 (2006.01) C12N 9/00 (2006.01) C12N 15/63 (2006.01) C12N 15/82 (2006.01) C12N 15/84 (2006.01) C12N 15/90 (2006.01)

Patent

CA 2306053

The invention relates to methods and compositions for site-specific recombinase-mediated mobilization of viral replicons and associated DNAs of interest from T-DNA. The methods of the invention comprise Agrobacterium- mediated transfer recombinase. The nucleic acids of the invention may additionally contain expression cassettes encoding the cognate site-specific recombinase for the target sites flanking the viral genome. The compositions of the invention further comprise Agrobacterium containing the nucleic acids of the invention. The compositions and methods of the invention have use in increasing the efficiency of agroinfection, providing high copy numbers of a DNA of interest for transient expression or for integration into a plant chromosome, and in simplifying the construction and stable maintenance of vectors for agroinfection and transformation.

L'invention concerne des procédés et des compositions permettant le transfert par recombinase à partir de l'ADN-T vers un site spécifique de réplicons viraux et des AND recherchés qui leur sont associés. Les procédés selon l'invention utilisent une recombinase de transfert induite par Agrobacterium. Les acides nucléiques selon l'invention peuvent, en outre, contenir des cassettes d'expression codant la recombinase correspondante dirigée sur un site spécifique pour les sites cibles bordant le génome viral. Les compositions selon l'invention comprennent également un Agrobacterium contenant les acides nucléiques selon l'invention. Les compositions et procédés selon l'invention sont utiles pour augmenter l'efficacité de l'infection par Agrobacterium, en fournissant un nombre élevé de copies d'un AND recherché pour l'expression transitoire ou pour l'intégration dans un chromosome de plante, et pour simplifier la construction et la stabilité des vecteurs destinés à l'infection par Agrobacterium et la transformation.

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