Methods and compositions for targeted cleavage and recombination
First Claim
1. A method for cleaving cellular chromatin in a region of interest, the method comprising:
- (a) selecting the region of interest;
(b) engineering a first zinc finger binding domain to bind to a first nucleotide sequence in the region of interest;
(c) providing a second zinc finger binding domain which binds to a second nucleotide sequence in the region of interest, wherein the second sequence is located between 2 and 50 nucleotides from the first sequence;
(d) expressing a first fusion protein in the cell, the first fusion protein comprising the first zinc finger binding domain and a first cleavage half-domain; and
(e) expressing a second fusion protein in the cell, the second fusion protein comprising the second zinc finger binding domain and a second cleavage half domain;
wherein (i) the first fusion protein binds to the first nucleotide sequence, (ii) the second fusion protein binds to the second nucleotide sequence, (iii) said binding of the first and second fusion proteins positions the cleavage half-domains such that the cellular chromatin is cleaved in the region of interest, and (iv) in at least one of the first or second fusion proteins, the cleavage half-domain is closer to the N-terminus and the zinc finger binding domain is closer to the C-terminus.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed herein are methods and compositions for targeted cleavage of a genomic sequence, targeted alteration of a genomic sequence, and targeted recombination between a genomic region and an exogenous polynucleotide homologous to the genomic region. The compositions include fusion proteins comprising a cleavage domain (or cleavage half-domain) and an engineered zinc finger domain, as well as polynucleotides encoding same. Fusion proteins comprising cleavage half-domains are used in pairs, to reconstitute a functional cleavage domain. In these fusion proteins, the zinc finger domain can be N-terminal to the cleavage half-domain, or the cleavage half-domain can be N-terminal to the zinc finger domain. The availability of fusion endonucleases having these different polarities allows targeting (and thereby binding) of zinc finger endonucleases either to opposite strands of the DNA target or to the same strand of the DNA target, thereby increasing the number of possible sequences which can be targeted and cleaved by the fusion proteins.
-
Citations
14 Claims
-
1. A method for cleaving cellular chromatin in a region of interest, the method comprising:
-
(a) selecting the region of interest;
(b) engineering a first zinc finger binding domain to bind to a first nucleotide sequence in the region of interest;
(c) providing a second zinc finger binding domain which binds to a second nucleotide sequence in the region of interest, wherein the second sequence is located between 2 and 50 nucleotides from the first sequence;
(d) expressing a first fusion protein in the cell, the first fusion protein comprising the first zinc finger binding domain and a first cleavage half-domain; and
(e) expressing a second fusion protein in the cell, the second fusion protein comprising the second zinc finger binding domain and a second cleavage half domain;
wherein (i) the first fusion protein binds to the first nucleotide sequence, (ii) the second fusion protein binds to the second nucleotide sequence, (iii) said binding of the first and second fusion proteins positions the cleavage half-domains such that the cellular chromatin is cleaved in the region of interest, and (iv) in at least one of the first or second fusion proteins, the cleavage half-domain is closer to the N-terminus and the zinc finger binding domain is closer to the C-terminus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification