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VO2+ complexation by bioligands showing keto-enol tautomerism: a potentiometric, spectroscopic, and computational study.
Inorg Chem
October 2011
Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy.
The interaction of VO(2+) ion with ligands of biological interest that are present in important metabolic pathways--2-oxopropanoic acid (pyruvic acid, pyrH), 3-hydroxy-2-oxopropanoic acid (3-hydroxypyruvic acid, hydpyrH), oxobutanedioic acid (oxalacetic acid, oxalH(2)), (S)-hydroxybutanedioic acid (l-malic acid, malH(2)), and 2,3-dihydroxy-(E)-butanedioic acid (dihydroxyfumaric acid, dhfH(2))--was described. Their complexing capability was compared with that of similar ligands: 3-hydroxy-2-butanone (hydbut) and 3,4-dihydroxy-3-cyclobutene-1,2-dione (squaric acid, squarH(2)). All of these ligands (except l-malic acid) exhibit keto-enol tautomerism, and the presence of a metal ion can influence such an equilibrium.
View Article and Find Full Text PDFThe intracellular location of oxalacetate keto-enol-tautomerase (oxaloacetate keto-enolisomerase) (EC 5.3.2.
View Article and Find Full Text PDFConsiderations of oxalacetic acid keto--enol equilibria in various solvents.
Arch Biochem Biophys
November 1972
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