An unusual mechanism for the major human apurinic/apyrimidinic (AP) endonuclease involving 5' cleavage of DNA containing a benzene-derived exocyclic adduct in the absence of an AP site.

@article{Hang1996AnUM,
  title={An unusual mechanism for the major human apurinic/apyrimidinic (AP) endonuclease involving 5' cleavage of DNA containing a benzene-derived exocyclic adduct in the absence of an AP site.},
  author={B. H. Hang and Ang{\'e}lica Chenna and H. L. Fraenkelconrat and B C Singer},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1996},
  volume={93 24},
  pages={
          13737-41
        }
}
The major human apurinic/apyrimidinic (AP) endonuclease (class II) is known to cleave DNA 5' adjacent to an AP site, which is probably the most common DNA damage produced hydrolytically or by glycosylase-mediated removal of modified bases. p-Benzoquinone (pBQ), one of the major benzene metabolites, reacts with DNA to form bulky exocyclic adducts. Herein we report that the human AP endonuclease directly catalyzes incision in a defined oligonucleotide containing 3,N4-benzetheno-2'-deoxycytidine… CONTINUE READING
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