Homologous recombination-based DNA cloning compositions
First Claim
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1. A kit for use in cloning a donor DNA molecule into an acceptor vector at a predetermined location, the kit consisting essentially of:
- (1) a composition comprising;
a) an enzyme cocktail consisting essentially of an exonuclease having only 3′
- or 5′
-exonucleolytic single-strand degradation activity, and a single-stranded DNA binding protein; and
b) a reaction buffer;
(2) instructions on using the composition in the cloning, and(3) a competent cell for use in the cloning.
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Abstract
Methods and compositions for cloning a donor DNA molecule into an acceptor vector at a predetermined location are described. The methods are based on homologous recombination mediated by in vitro treatment of the donor DNA and the acceptor vector with an enzyme cocktail containing an exonuclease and a single-stranded DNA binding protein.
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Citations
8 Claims
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1. A kit for use in cloning a donor DNA molecule into an acceptor vector at a predetermined location, the kit consisting essentially of:
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(1) a composition comprising; a) an enzyme cocktail consisting essentially of an exonuclease having only 3′
- or 5′
-exonucleolytic single-strand degradation activity, and a single-stranded DNA binding protein; andb) a reaction buffer; (2) instructions on using the composition in the cloning, and (3) a competent cell for use in the cloning. - View Dependent Claims (3, 4, 5)
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2. A system for use in cloning a donor DNA molecule into an acceptor vector at a predetermined location, the system comprising:
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a) the acceptor vector; b) an extended donor DNA molecule comprising a first sequence and a second sequence at the 5′
-end and the 3′
-end of the donor DNA molecule, respectively, wherein each of the first and second sequences, independently, is at least 12 nucleotides in length and is at least 90% identical to a first region and a second region of the acceptor vector, respectively;c) a composition comprising a reaction buffer and an enzyme cocktail consisting essentially of an exonuclease having only 3′
- or 5′
- exonucleolytic single-strand degradation activity, and a single-stranded DNA binding protein; andd) a cell transformable with an intermediate product formed after incubating a reaction mixture comprising (a), (b) and (c), whereby the transformed cell produces a recombinant DNA molecule that comprises the donor DNA located between the first and the second regions. - View Dependent Claims (6, 7, 8)
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Specification