Abstract：
:Zinc-finger nucleases (ZFNs) drive efficient genome editing by introducing a double-strand break into the targeted gene. Cleavage is induced when two custom-designed ZFNs heterodimerize upon binding DNA to form a catalytically active nuclease complex. The importance of this dimerization event for subsequent cleavage activity has stimulated efforts to engineer the nuclease interface to prevent undesired homodimerization. Here we report the development and application of a yeast-based selection system designed to functionally interrogate the ZFN dimer interface. We identified critical residues involved in dimerization through the isolation of cold-sensitive nuclease domains. We used these residues to engineer ZFNs that have superior cleavage activity while suppressing homodimerization. The improvements were portable to orthogonal domains, allowing the concomitant and independent cleavage of two loci using two different ZFN pairs. These ZFN architectures provide a general means for obtaining highly efficient and specific genome modification.
journal_name
Nat Methodsjournal_title
Nature methodsauthors
Doyon Y,Vo TD,Mendel MC,Greenberg SG,Wang J,Xia DF,Miller JC,Urnov FD,Gregory PD,Holmes MCdoi
10.1038/nmeth.1539subject
Has Abstractpub_date
2011-01-01 00:00:00pages
74-9issue
1eissn
1548-7091issn
1548-7105pii
nmeth.1539journal_volume
8pub_type
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