Accessibility navigation

Controlled dehydration of a ruthenium complex-DNA crystal induces reversible DNA kinking

Hall, J. P. ORCID:, Sanchez-Weatherby, J., Alberti, C., Hurtado Quimper, C., O'Sullivan, K., Brazier, J. A. ORCID:, Winter, G., Sorensen, T., Kelly, J. M., Cardin, D. J. and Cardin, C. J. ORCID: (2014) Controlled dehydration of a ruthenium complex-DNA crystal induces reversible DNA kinking. Journal of the American Chemical Society, 136 (50). pp. 17505-17512. ISSN 0002-7863

Text - Accepted Version
· Please see our End User Agreement before downloading.


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: 10.1021/ja508745x


Hydration-dependent DNA deformation has been known since Rosalind Franklin recognised that the relative humidity of the sample had to be maintained to observe a single conformation in DNA fibre diffraction. We now report for the first time the crystal structure, at the atomic level, of a dehydrated form of a DNA duplex and demonstrate the reversible interconversion to the hydrated form at room temperature. This system, containing d(TCGGCGCCGA) in the presence of Λ-[Ru(TAP)2(dppz)]2+ (TAP = 1,4,5,8-tetraazaphenanthrene, dppz = dipyridophenazine), undergoes a partial transition from an A/B hybrid to the A-DNA conformation, at 84-79% relative humidity. This is accompanied by an increase in kink at the central step from 22° to 51°, with a large movement of the terminal bases forming the intercalation site. This transition is reversible on rehydration. Seven datasets, collected from one crystal at room temperature, show the consequences of dehydration at near-atomic resolution. This result highlights that crystals, traditionally thought of as static systems, are still dynamic and therefore can be the subject of further experimentation.

Item Type:Article
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Xray (CAF)
ID Code:40118
Publisher:American Chemical Society


Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation