Novel dna cloning method

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/09 (2006.01) C12N 15/10 (2006.01) C12N 15/63 (2006.01) C12N 15/66 (2006.01) C12N 15/90 (2006.01)

Patent

CA 2312474

The invention refers to a novel method for cloning DNA molecules using a homologous recombination mechanism between at least two DNA molecules comprising: a) providing a host cell capable of performing homologous recombination, b) contacting in said host cell a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule comprising at least two regions of sequence homology to regions on the first DNA molecule, under conditions which favour homologous recombination between said first and second DNA molecules and c) selecting a host cell in which homologous recombination between said first and second DNA molecules has occurred. In particular, it relies on the use of the E. coli RecE and RecT proteins, the bacteriophage Red-alpha and Red-beta proteins, or the phage P22 recombination system. The beneficial effects of concomitant expression of the RecBC inhibitor genes (e.g. Red-Gamma) is also examplified.

Cette invention concerne un nouveau procédé de clonage de molécules d'ADN qui fait appel à un mécanisme de recombinaison homologue entre au moins deux molécules d'ADN et qui consiste à: a) obtenir une cellule hôte capable d'assurer une recombinaison homologue; b) mettre en contact dans cette cellule hôte une première cellule d'ADN pouvant être répliquée dans ladite cellule hôte avec une seconde molécule d'ADN qui renferme au moins deux régions d'homologie de séquence par rapport à des régions de la première molécule, ceci dans des conditions qui favorisent une recombinaison homologue entre lesdites première et seconde molécules d'ADN et; c) sélectionner une cellule hôte dans laquelle s'est produite une recombinaison homologue entre les première et seconde molécules d'ADN.

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