A computational study on the redox properties and binding affinities of iron complexes of hydroxypyridinones

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Coimbra, JTS (Autor) Outra; Natercia F Bras (Autor) FCUP; Pedro A Fernandes (Autor) FCUP; Maria Rangel (Autor) ICBAS; Ramos, MJ (Autor) FCUP

Revista

Título: Journal Of Molecular Modeling

Vol. 25

Página Final: 172

ISSN: 1610-2940

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-00Q-MVH

DOI: 10.1007/s00894-019-4037-0

Abstract (EN): The potential of hydroxypyridinones for in vivo iron sequestration, in both biological and medical contexts, has been extensively discussed in the literature. Different chelators can be designed, with distinct lipophilicities that should alter their cell permeability, distribution, and rates of metabolism. However, for effective iron scavenging in biological systems, the redox potential and binding affinity of iron must fall within a proper range. Our objective was to assess the impact of different hydroxypyridinone chelators in 3:1 iron(III) complexes through comparison of these thermodynamic properties. For that purpose, we employed a cluster-continuum approach using density functional theory, on a dataset of 25 iron complexes. Whenever possible, our results were compared with experimental stability constants (log ) and with electrode potentials. We observed a good qualitative agreement between computed free energies of binding and log values. In addition, we described which substitutions to the 3-hydroxypyridin-4-one ring should not markedly affect the redox properties and metal ion affinity considering iron.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8