Method for making recombinant yeast artificial chromosomes

C - Chemistry – Metallurgy – 12 – N

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C12N 15/10 (2006.01) C12N 15/04 (2006.01) C12N 15/65 (2006.01) C12N 15/81 (2006.01)

Patent

CA 2204359

The present invention provides methods for construction of recombinant Yeast Articifial Chromosomes ("YAC") by homologous recombination between YACs during meiosis. In particular, conditions are provided for the step of mating haploid cells and for the step of spore analysis that increase the frequency of spores containing the desired recombinant YAC. The methods find particular use in constructing recombinant YACs between YACs that are incompatible when co- propagated in a diploid and/or that share homology regions of less than about 50 kilobases. Linking YACs, methods of their construction, and methods of their use are provided that allow facile construction of a YAC containing two or more discontinuous regions of DNA.

L'invention concerne des procédés de construction de chromosomes artificiels de levure ("YAC") de recombinaison par recombinaison homologue entre les chromosomes artificiels de levure pendant la méliose. En particulier, des conditions sont établies pour l'étape d'union de cellules haploïdes et pour l'étape d'analyse des spores afin d'augmenter la fréquence des spores contenant le chromosome artificiel de levure de recombinaison désiré. Les procédés s'appliquent en particulier à la construction de chromosomes artificiels de levure de recombinaison entre des chromosomes artificiels de levure qui sont incompatibles lorsqu'ils sont copropagés dans une diploïde et/ou qui partagent des régions d'homologie inférieures à environ 50 kilobases. La liaison des chromosomes artificiels de levure, des procédés pour leur construction, et des procédés d'utilisation de ces chromosomes sont décrits afin de construire facilement un chromosome artificiel de levure contenant au moins deux régions discontinues d'ADN.

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