Cloning host organisms

Details Cloning host organisms Cloning host organisms

C - Chemistry, Metallurgy

12

N

195/1.12

C12N 15/63 (2006.01) C07K 14/245 (2006.01) C12N 1/00 (2006.01) C12N 15/10 (2006.01)

Patent

CA 2033355

Methods and materials fox the cloning of DNA, in particular, for the cloning of "unclonable" DNA using genetically engineered host cells. Host cell organisms have been discovered that stabilize and inhibit rearrangement of DNA molecules capable of forming non-standard secondary and tertiary structures. Organisms are engineered to contain at least one mutation which inactivates homologous recombination and at least one mutation in a DNA repair pathway. Examples of such DNA pathways include Uv repair pathway, the SOS repair pathway, the mismatch repair pathway, the adaptive response pathway, the heat shock response pathway, the osmotic shock response pathway, the repair pathway of alkylation damage, the repair pathway of uracil incorporation into DNA and pathways involved in maintaining DNA superhelicity. The host organisms of this invention are suitable for cloning DNA capable of forming non-standard and tertiary structures such as found in eukaryotic DNA.

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