Structural studies reveal the enantiospecific recognition of a DNA G-quadruplex by a ruthenium polypyridyl complexMcQuaid, K., Abell, H., Gurung, S. P., Allan, D. R., Winter, G., Sorensen, T., Cardin, D. J., Brazier, J. A. ORCID: https://orcid.org/0000-0002-4952-584X, Cardin, C. J. ORCID: https://orcid.org/0000-0002-2556-9995 and Hall, J. P. ORCID: https://orcid.org/0000-0003-3716-4378 (2019) Structural studies reveal the enantiospecific recognition of a DNA G-quadruplex by a ruthenium polypyridyl complex. Angewandte Chemie International Edition, 58 (29). pp. 9881-9885. ISSN 1433-7851
It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1002/anie.201814502 Abstract/SummaryUsing X-ray crystallography, we show an enantiospecificity in DNA G-quadruplex binding, using the complexes Λ/∆-[Ru(TAP)2(dppz-11-CN)]2+ (TAP=1,4,5,8-tetraazaphenanthrene) containing the dppz (dipyridophenazine) ligand, paralleling the specificity of the complexes with duplex DNA. The Λ complex crystallises with the normally parallel stranded d(TAGGGTTA) tetraplex to give the first such antiparallel strand assembly in which syn-guanosine is adjacent to the complex at the 5’ end of the quadruplex core. SRCD measurements confirm that the same conformational switch occurs in solution. The Δ enantiomer, by contrast, is present in the structure but stacked at the ends of the assembly. In addition, we report the structure of Λ-[Ru(phen)2(11-CN-dppz)]2+ bound to d(TCGGCGCCGA), a duplex forming sequence, and use both structural models to aid in the elucidation of the motif-specific luminescence response of the isostructural phen analogue enantiomers. Download Statistics DownloadsDownloads per month over past year Altmetric Funded Project Deposit Details University Staff: Request a correction | Centaur Editors: Update this record |