Modular dna-binding domains and methods of use

Abstract

The present invention refers to methods for selectively recognizing a base pair in a DNA sequence by a polypeptide, to modified polypeptides which specifically recognize one or more base pairs in a DNA sequence and, to DNA which is modified so that it can be specifically recognized by a polypeptide and to uses of the polypeptide and DNA in specific DNA targeting as well as to methods of modulating expression of target genes in a cell.

1 . A method of modulating expression of a target gene in a cell, the method comprising introducing into the cell a non-naturally occurring fusion protein comprising an artificial transcription activator-like (TAL) effector repeat domain of contiguous repeat units 33 to 35 amino acids in length, wherein the repeat domain is engineered for recognition of a predetermined nucleotide sequence, wherein the repeat domain is contained in a polypeptide controlling the transcription of a gene, and wherein the fusion protein recognizes the predetermined nucleotide sequence. 
     
     
         2 . The method of  claim 1 , wherein the cell is a eukaryotic cell. 
     
     
         3 . The method of  claim 1 , wherein the cell is an animal cell. 
     
     
         4 . The method of  claim 1 , wherein the cell is a mammalian cell. 
     
     
         5 . The method of  claim 1 , wherein the cell is a human cell. 
     
     
         6 . The method of  claim 1 , wherein the cell is a plant cell. 
     
     
         7 . The method of  claim 1 , wherein the cell is a prokaryotic cell.