NADPH-dependent flavoreductases are important drug targets. During their enzymatic cycle thiolates and selenolates that have high affinity for transition metals are generated. Auranofin (AF), a gold-containing compound, is classified by the World Health Organization as an antirheumatic agent and it is indicated as the scaffold for the development of new anticancer and antiparasitic drugs. AF inhibits selenocysteine-containing flavoreductases (thioredoxin reductase and thioredoxin glutathione reductase) more effectively than non Se-containing ones (glutathione reductase); this preference has been ascribed to the high affinity of selenium for gold. We solved the 3D structure of the Se-containing Thioredoxin Glutathione Reductase from the human parasite Schistosoma mansoni complexed with Au and our results challenge this view: we believe that the relative velocity of the reaction rather than the relative affinity, depends on the presence of Sec residues, which appear to dictate AF selectivity. (c) 2011 Elsevier Inc. All rights reserved.

On the mechanism and rate of gold incorporation into thiol-dependent flavoreductases / Saccoccia, Fulvio; Angelucci, Francesco; Boumis, Giovanna; Brunori, Maurizio; Miele, Adriana Erica; David L., Williams; Bellelli, Andrea. - In: JOURNAL OF INORGANIC BIOCHEMISTRY. - ISSN 0162-0134. - 108:(2012), pp. 105-111. [10.1016/j.jinorgbio.2011.11.005]

On the mechanism and rate of gold incorporation into thiol-dependent flavoreductases

SACCOCCIA, FULVIO;ANGELUCCI, Francesco;BOUMIS, Giovanna;BRUNORI, Maurizio;MIELE, Adriana Erica;BELLELLI, Andrea
2012

Abstract

NADPH-dependent flavoreductases are important drug targets. During their enzymatic cycle thiolates and selenolates that have high affinity for transition metals are generated. Auranofin (AF), a gold-containing compound, is classified by the World Health Organization as an antirheumatic agent and it is indicated as the scaffold for the development of new anticancer and antiparasitic drugs. AF inhibits selenocysteine-containing flavoreductases (thioredoxin reductase and thioredoxin glutathione reductase) more effectively than non Se-containing ones (glutathione reductase); this preference has been ascribed to the high affinity of selenium for gold. We solved the 3D structure of the Se-containing Thioredoxin Glutathione Reductase from the human parasite Schistosoma mansoni complexed with Au and our results challenge this view: we believe that the relative velocity of the reaction rather than the relative affinity, depends on the presence of Sec residues, which appear to dictate AF selectivity. (c) 2011 Elsevier Inc. All rights reserved.
2012
thioredoxin glutathione reductase; gold–cysteine complex; gold-selenocysteine complex; gold–selenocysteine complex; gold-cysteine complex; auranofin
01 Pubblicazione su rivista::01a Articolo in rivista
On the mechanism and rate of gold incorporation into thiol-dependent flavoreductases / Saccoccia, Fulvio; Angelucci, Francesco; Boumis, Giovanna; Brunori, Maurizio; Miele, Adriana Erica; David L., Williams; Bellelli, Andrea. - In: JOURNAL OF INORGANIC BIOCHEMISTRY. - ISSN 0162-0134. - 108:(2012), pp. 105-111. [10.1016/j.jinorgbio.2011.11.005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/434335
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