A novel DNA structure induced by the anticancer bisplatinum compound crosslinked to a GpC site in DNA.
Yang, D., van Boom, S.S., Reedijk, J., van Boom, J.H., Farrell, N., Wang, A.H.(1995) Nat Struct Biol 2: 577-586
- PubMed: 7664126 
- DOI: https://doi.org/10.1038/nsb0795-577
- Primary Citation of Related Structures:  
1AU6 - PubMed Abstract: 
The bifunctional platinum compound, [(trans-PtCI(NH)3)2)2(H2N(CH2)4NH2)]2+, forms a stable adduct with the self-complementary DNA oligomer CATGCATG, with the two platinum atoms coordinated at the N7 positions of the two symmetrical G4 nucleotides. The NMR-derived structure shows that the DNA octamer forms a novel hairpin structure with the platinated G4 residue adopting a syn conformation and the guanine base in the minor groove. Two such hairpins stack end-over-end and are linked together by the butanediamine tether to form a dumbbell structure. Such unusual structural distortion is different from that of the anticancer drug cisplatin-DNA adduct and may provide clues to explain the distinct biological activities of the two compounds.
Organizational Affiliation: 
Biophysics Division, University of Illinois at Urbana-Champaign 61801, USA.