UAS regulatory sequences drive expression of Ecol\hsdR sequence isolated from the Escherichia coli B strain (CGCS#2507), mutated to carry the K477R amino acid replacement (mutation in the ATPase domain, rendering the subunit deficient in both endonuclease and translocation functions). The coding sequence is tagged at the N-terminal end with the Tag:Mito(kdn) mitochondrial targeting sequence.