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  • Hall, James P., et al. (author)
  • Guanine Can Direct Binding Specificity of Ru-dipyridophenazine (dppz) Complexes to DNA through Steric Effects
  • 2017
  • In: Chemistry - A European Journal. - : Wiley-VCH Verlagsgesellschaft. - 0947-6539 .- 1521-3765. ; 23:21, s. 4981-4985
  • Journal article (peer-reviewed)abstract
    • X-ray crystal structures of three -[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.
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