| abstract |
The present invention relates to a polynucleotide encoding a monomer of an I-CreI variant said monomer comprising mutations in the amino acid sequence of SEQ ID NO: 34, wherein said mutations include: (i) at least one and up to eleven amino acid substitutions from residue S22 to Q44 said substitutions selected from the group consisting of substitutions at positions I24, Q26, K28, N30, S32, Y33, Q38, S40 and T42; and (ii) at least one and up to six amino acid substitutions from residue Y66 to I77 said substitutions selected from the group consisting of substitutions at positions Y66, R68, R70, V73 and I77; and wherein said monomer when in dimeric form binds and cleaves DNA. |