METHOD FOR GENOME EDITING
First Claim
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1. A method for editing a chromosomal sequence, the method comprising:
- a. introducing into a non-human embryo comprising the chromosomal sequence at least one nucleic acid encoding a zinc finger nuclease, the embryo being other than a zebrafish or fruit fly embryo, the zinc finger nuclease being able to bind a target sequence in the chromosomal sequence and to cleave a cleavage site in the chromosomal sequence, and, optionally,(i) at least one donor polynucleotide comprising a donor sequence for integration, an upstream sequence, and a downstream sequence, wherein the donor sequence is flanked by the upstream sequence and the downstream sequence, and wherein the upstream sequence and the downstream sequence share substantial sequence identity with either side of the cleavage site, or(ii) at least one exchange polynucleotide comprising an exchange sequence that is substantially identical to a portion of the chromosomal sequence at the cleavage site and further comprising at least one nucleotide change; and
b. culturing the embryo to allow expression of the zinc finger nuclease such that the zinc finger nuclease introduces a double-stranded break into the chromosomal sequence at the cleavage site, and wherein the double-stranded break is repaired by either(i) a non-homologous end-joining repair process such that a mutation is introduced into the chromosomal sequence, or(ii) a homology-directed repair process such that the donor sequence is integrated into the chromosomal sequence or the exchange sequence is exchanged with the portion of the chromosomal sequence.
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Abstract
The present invention encompasses a method for creating an animal or cell with at least one chromosomal edit. In particular, the invention relates to the use of targeted zinc finger nucleases to edit chromosomal sequences. The invention further encompasses an animal or a cell created by a method of the invention.
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Citations
21 Claims
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1. A method for editing a chromosomal sequence, the method comprising:
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a. introducing into a non-human embryo comprising the chromosomal sequence at least one nucleic acid encoding a zinc finger nuclease, the embryo being other than a zebrafish or fruit fly embryo, the zinc finger nuclease being able to bind a target sequence in the chromosomal sequence and to cleave a cleavage site in the chromosomal sequence, and, optionally, (i) at least one donor polynucleotide comprising a donor sequence for integration, an upstream sequence, and a downstream sequence, wherein the donor sequence is flanked by the upstream sequence and the downstream sequence, and wherein the upstream sequence and the downstream sequence share substantial sequence identity with either side of the cleavage site, or (ii) at least one exchange polynucleotide comprising an exchange sequence that is substantially identical to a portion of the chromosomal sequence at the cleavage site and further comprising at least one nucleotide change; and b. culturing the embryo to allow expression of the zinc finger nuclease such that the zinc finger nuclease introduces a double-stranded break into the chromosomal sequence at the cleavage site, and wherein the double-stranded break is repaired by either (i) a non-homologous end-joining repair process such that a mutation is introduced into the chromosomal sequence, or (ii) a homology-directed repair process such that the donor sequence is integrated into the chromosomal sequence or the exchange sequence is exchanged with the portion of the chromosomal sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 18)
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9-10. -10. (canceled)
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16-17. -17. (canceled)
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19. A non-human embryo, the embryo being other than a zebrafish or fruit fly embryo and comprising at least one nucleic acid encoding a zinc finger nuclease that is able to bind a target sequence in the chromosomal sequence and cleave a cleavage site in the chromosomal sequence, and, optionally,
(i) at least one donor polynucleotide comprising a donor sequence for integration, an upstream sequence, and a downstream sequence, wherein the donor sequence is flanked by the upstream sequence and the downstream sequence, and wherein the upstream sequence and the downstream sequence share substantial sequence identity with either side of the cleavage site, or (ii) at least one exchange polynucleotide comprising an exchange sequence that is substantially identical to a portion of the chromosomal sequence at the cleavage site and which further comprises at least one nucleotide change.
Specification