The interaction of Schiff Base complexes of nickel(II) and zinc(II) with duplex and G-quadruplex DNA

Bonsignore, Riccardo ORCID: https://orcid.org/0000-0003-2699-4384, Russo, Fabrizia, Terenzi, Alessio, Spinello, Angelo, Lauria, Antonino, Gennaro, Giuseppe, Almerico, Anna Maria, Keppler, Bernhard K. and Barone, Giampaolo 2018. The interaction of Schiff Base complexes of nickel(II) and zinc(II) with duplex and G-quadruplex DNA. Journal of Inorganic Biochemistry 178 , pp. 106-114. 10.1016/j.jinorgbio.2017.10.010

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Abstract

The duplex and G-quadruplex DNA-binding of six nickel(II) and zinc(II) complexes of three salphen-like ligands (salphen = N,N′-bis-salicylidene-1,2-phenylenediaminato) was investigated by UV–visible absorption and circular dichroism spectroscopy. The results obtained, in particular the values of the DNA-binding constants, Kb, point out that the nickel(II) complexes show a higher affinity toward both duplex and G-quadruplex DNA, compared to the analogous zinc(II) complexes. Interestingly, the zinc(II) complexes possess high selectivity toward G-quadruplex DNA, being negligible their binding with duplex DNA. Molecular dynamics (MD) simulations provided atomistic models for the interpretation of the binding of the zinc(II) complexes with G-quadruplex DNA, allowing a structural comparison of the three salphen-like ligands, due to the presence of different substituents (H, F, CF3) on the position 4 of the phenyl ring on the N,N′ bridge.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	Elsevier
ISSN:	0162-0134
Date of Acceptance:	25 October 2017
Last Modified:	07 Nov 2022 09:19
URI:	https://orca.cardiff.ac.uk/id/eprint/128679

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