T4 endonuclease V protects the DNA strand opposite a thymine dimer from cleavage by the footprinting reagents DNase I and 1,10-phenanthroline-copper.


The glycosylase/abasic lyase T4 endonuclease V initiates the repair of ultraviolet light-induced pyrimidine dimers. This enzyme forms an imino intermediate between its N-terminal alpha-NH2 group and C-1' of the 5'-residue within the dimer. Sodium borohydride was used to covalently trap endonuclease V to a 49-base pair oligodeoxynucleotide containing a site… (More)


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