5lfs
From Proteopedia
Lambda-[Ru(bpy)2(dppz)]2+ bound to brominated DNA
Structural highlights
Publication Abstract from PubMedX-ray crystal structures of three Lambda-[Ru(L)2 dppz]2+ complexes (dppz=dipyridophenazine; L=1,10-phenanthroline (phen), 2,2'-bipyridine (bpy)) bound to d((5BrC)GGC/GCCG) showed the compounds intercalated at a 5'-CG-3' step. The compounds bind through canted intercalation, with the binding angle determined by the guanine NH2 group, in contrast to symmetrical intercalation previously observed at 5'-TA-3' sites. This result suggests that canted intercalation is preferred at 5'-CG-3' sites even though the site itself is symmetrical, and we hypothesise that symmetrical intercalation in a 5'-CG-3' step could give rise to a longer luminescence lifetime than canted intercalation. Guanine Can Direct Binding Specificity of Ru-dipyridophenazine (dppz) Complexes to DNA through Steric Effects.,Hall JP, Gurung SP, Henle J, Poidl P, Andersson J, Lincoln P, Winter G, Sorensen T, Cardin DJ, Brazier JA, Cardin CJ Chemistry. 2017 Jan 19. doi: 10.1002/chem.201605508. PMID:28105682[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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