30 research outputs found
A Comparative Study of Stabilities and Coordination Modes of β-Alaninephosphonic Acid in Copper(II) Heteroligand Complexes with Ethylenediamine, Diethylenetriamine or N,N,Nâ˛,Nâ˛,Nâł-Pentamethyldiethylene Triamine in Aqueous Solution
Stabilities and Coordination Modes of Îą-Alaninephosphonic Acid in Copper(II) Heteroligand Complexes with Ethylenediamine, Diethylenetriamine or N,N,Nâ˛,Nâ˛,Nâł-Pentamethyldiethylene Triamine in Aqueous Solution
INVESTIGATION OF THE SOLUTION STRUCTURE OF Cu(II) MIXED-LIGAND COMPLEXES OF ADENOSINE 5â˛-MONOPHOSPHATE AND CYTIDINE 5â˛-MONOPHOSPHATE AND POLYAMINES
Complexes of cadmium(II) and mercury(II) ions with cytidine or cytidine-5â˛-monophosphate in ternary systems including tetramines
Interactions of cadmium(II) ions with adenosine as well as adenosine-5â˛-monophosphate and diamine or triamines in the ternary systems
COMPLEX FORMATION IN COPPER(II) TERNARY SYSTEMS INVOLVING POLYAMINES AND DIAMINOCARBOXYLATES STUDIED BY POTENTIOMETRIC AND SPECTROSCOPIC TECHNIQUES
Equilibrium and spectroscopic studies of ternary cadmium(II) and mercury(II) complexes with CMP and triamines
High resolution crystal structure of Z DNA in complex with Cr3 cations
This work is part of our project aimed at characterizing metal-binding properties of left-handed Z-DNA helices. The three Cr(3+) cations found in the asymmetric unit of the d(CGCGCG)(2)âCr(3+) crystal structure do not form direct coordination bonds with atoms of the Z-DNA molecule. Instead, the hydrated Cr(3+) ions are engaged in outer-sphere interactions with phosphate groups and O6 and N7 guanine atoms of the DNA. The Cr(3+)(1) and Cr(3+)(2) ions have disordered coordination spheres occupied by six water molecules each. These partial-occupancy chromium cations are 2.354(15)Â Ă
apart and are bridged by three water molecules from their hydration spheres. The Cr(3+)(3) cation has distorted square pyramidal geometry. In addition to the high degree of disorder of the DNA backbone, alternate conformations are also observed for the deoxyribose and base moieties of the G2 nucleotide. Our work illuminates the question of conformational flexibility of Z-DNA and its interaction mode with transition-metal cations. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00775-015-1247-5) contains supplementary material, which is available to authorized users