The new heterodinuclear complex [Fe(III)Zn(II)(BPBPMP)(OAc)(2)]ClO(4) (1) with the unsymmetrical N(5)O(2) donor ligand 2-bis[((2-pyridylmethyl)-aminomethyl)-6-[(2-hydroxybenzyl)(2-pyridylmethyl)]-aminomethyl]-4-methylphenol (H(2)BPBPMP) has been synthesized and characterized by X-ray crystallography, which reveals that the complex cation has an Fe(III)Zn(II)(mu-phenoxo)-bis(mu-carboxylato) core. Solution studies of 1 indicate that a pH-induced change of the bridging acetate occurs, and the formation of an active [(OH)Fe(III)Zn(II)(OH(2))] species as a highly efficient catalyst under weakly acidic conditions for phosphate diesters hydrolysis is proposed.
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http://dx.doi.org/10.1021/ic025892d | DOI Listing |
J Inorg Biochem
January 2022
Centro de Biologia Molecular Estrutural, Departamento de Bioquímica, Universidade Federal de Santa Catarina, Florianópolis 88040-970, Brazil. Electronic address:
The investigation of compounds capable of strongly and selectively interacting with DNA comprises a field of research in constant development. In this work, we demonstrate that a trinuclear coordination complex based on a dinuclear Fe(III)Zn(II) core designed for biomimicry of the hydrolytic enzyme kidney bean purple acid phosphatase, containing an additional pendant arm coordinating a Pd(II) ion, has the ability to interact with DNA and to promote its hydrolytic cleavage. These results were found through analysis of plasmid DNA interaction and cleavage by the trinuclear complex 1 and its derivatives 2 and 3, in addition to the analysis of alteration in the DNA structure in the presence of the complexes through circular dichroism and DNA footprinting techniques.
View Article and Find Full Text PDFInorg Chem
September 2020
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China.
The bimetallic system is an important strategy for the catalytic hydrolysis of phosphodiester. The purple acid phosphatase (PAPs) enzyme is a typical bimetallic catalyst in this field. Mechanistic details for the hydrolysis cleavage of the DNA dinucleotide analogue BNPP (BNPP = bis(-nitrophenyl) phosphate) by hetero-binuclear [Fe(μ-OH)ZnL] complexes (L = 2-[-bis(2-pyridylmethyl)-aminomethyl]-4-methyl-6-['-(2-pyridylmethyl)(2-hydroxybenzyl) aminomethyl] phenol) were investigated using density functional theory calculations.
View Article and Find Full Text PDFJ Biol Inorg Chem
August 2019
Laboratório de Bioirorgânica e Cristalografia, Departmento de Química, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
In this paper, the catalytic effects of aminoguanidine and aminopurine groups in the second sphere of a FeZn complex that mimics the active site of the metallohydrolase purple acid phosphatase (PAP) are investigated, with a particular view on DNA as substrate. The ligand 3-(((3-((bis(2-(pyridin-2-yl)ethyl)amino)methyl)-2-hydroxy-5-methylbenzyl)(pyridin-2-ylmethyl)amino)meth-yl)-2 hydroxy-5-methylbenzaldehyde-(HLbpea) was synthesized and its complex [(OH)Fe(μ-OH)Zn(HO)(Lbpea)](ClO) was used as a base for comparison with similar complexes previously published in the literature. Subsequent modifications were conducted in the aldehyde group, where aminoguanidine (amig) and aminopurine (apur) were used as side chain derivatives.
View Article and Find Full Text PDFEur J Med Chem
September 2018
The University of Queensland, School of Chemistry and Molecular Biosciences, Brisbane, QLD 4072, Australia. Electronic address:
Purple acid phosphatases (PAPs) are metalloenzymes that catalyse the hydrolysis of phosphate esters under acidic conditions. Their active site contains a Fe(III)Fe(II) metal centre in mammals and a Fe(III)Zn(II) or Fe(III)Mn(II) metal centre in plants. In humans, elevated PAP levels in serum strongly correlate with the progression of osteoporosis and metabolic bone malignancies, which make PAP a target suitable for the development of chemotherapeutics to combat bone ailments.
View Article and Find Full Text PDFInorg Chem
January 2018
School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia.
Herein, we report the synthesis and characterization of two dinuclear FeZn complexes [FeZnLP1] (1) and [FeZnLP2] (2), in which LP1 and LP2 are conjugated systems containing one and two pyrene groups, respectively, connected via the diamine -HN(CH)NH- spacer to the well-known NO-donor HL ligand (HL = 2-bis{[(2-pyridylmethyl)aminomethyl]-6-[(2-hydroxybenzyl)(2-pyridylmethyl)]aminomethyl}-4-methylphenol). The complex [FeZnL1] (3), in which HL was modified to HL1, with a carbonyl group attached to the terminal phenol group, was included in this study for comparison purposes. Both complexes 1 and 2 were satisfactorily characterized in the solid state and in solution.
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