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Mechanism of double-strand DNA cleavage effected by iron-bleomycin
T Kobayashi1, L L Guo, Y Nishida
1Institute for Molecular Science, Myodaijimachi, Okazaki, Japan.
Zeitschrift Fur Naturforschung. C, Journal of Biosciences
|January 9, 1999
Abstract:
We have observed that in the absence of hydrogen peroxide the Fe(III)-bleomycin (BLM) complex exhibits high DNA cleavage efficiency, converting supercoiled Form I DNA (pBR322 or phix174) to Form II (nicked, relaxed circular); the present study may give an important clue to elucidate the fact that iron-bleomycin mediated double-strand DNA cleavage requires at least one molecule of oxygen (O2) over the amount required to form 'activated bleomycin."