Mechanism of DNA damage by chromium carcinogens
Abstract
Oxochromimum(V) centers initiate DNA cleavage through a chromium(V)-phosphate diester intermediate by hydrogen abstraction from the C1′ position of the ribose sugar, leading to the formation of 5-methylene-2-furanone, 3′-phosphate terminus and DNA bases; by contrast a plasmid DNA (pUC19)is only nicked.