Analysis of products formed during bleomycin-mediated DNA degradation.
By the use of DNA, copolymers of defined nucleotide composition, and a synthetic dodecanucleotide having putative bleomycin cleavage sites in proximity to the 5'- and 3'-termini, the products formed concomitant with DNA strand scission have been isolated and subjected to structural identification and quantitation via direct comparison with authentic synthetic samples. The products of DNA strand scission by Fe(II)-bleomycin include oligonucleotides having each of the four possible nucleoside 3'-(phosphoro-2''-O-glycolates) at their 3'-termini, as well as the four possible base propenals. At least for 3-(adenin-9'-yl)propenal and 3-(thymin-1'-yl)propenal, the products formed were exclusively of the trans configuration.
N
N
Murugesan
C
C
Xu
G M
GM
Ehrenfeld
H
H
Sugiyama
R E
RE
Kilkuskie
L O
LO
Rodriguez
L H
LH
Chang
S M
SM
Hecht
D001483:Base Sequence; D001761:Bleomycin; D055598:Chemical Phenomena; D002621:Chemistry; D002851:Chromatography, High Pressure Liquid; D004269:DNA, Bacterial; D006016:Glycolates / Q000138:chemical synthesis*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008315:Malondialdehyde; D013058:Mass Spectrometry; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis*
D004269:DNA, Bacterial; D006016:Glycolates; D007202:Indicators and Reagents; D009838:Oligodeoxyribonucleotides; D001761:Bleomycin; D008315:Malondialdehyde