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Meneghello M, Uzel A, Broc M, Manuel RR, Magalon A, Léger C, Pereira IAC, Walburger A, Fourmond V. Electrochemical Kinetics Support a Second Coordination Sphere Mechanism in Metal-Based Formate Dehydrogenase. Angew Chem Int Ed Engl 2023; 62:e202212224. [PMID: 36465058 PMCID: PMC10107981 DOI: 10.1002/anie.202212224] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/28/2022] [Accepted: 12/02/2022] [Indexed: 12/07/2022]
Abstract
Metal-based formate dehydrogenases are molybdenum or tungsten-dependent enzymes that catalyze the interconversion between formate and CO2 . According to the current consensus, the metal ion of the catalytic center in its active form is coordinated by 6 S (or 5 S and 1 Se) atoms, leaving no free coordination sites to which formate could bind to the metal. Some authors have proposed that one of the active site ligands decoordinates during turnover to allow formate binding. Another proposal is that the oxidation of formate takes place in the second coordination sphere of the metal. Here, we have used electrochemical steady-state kinetics to elucidate the order of the steps in the catalytic cycle of two formate dehydrogenases. Our results strongly support the "second coordination sphere" hypothesis.
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Affiliation(s)
- Marta Meneghello
- CNRS, Aix Marseille Université, BIP, IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Alexandre Uzel
- CNRS, Aix Marseille Université, BIP, IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France.,Aix Marseille Université, CNRS, Laboratoire de Chimie Bactérienne (UMR7283), IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Marianne Broc
- Aix Marseille Université, CNRS, Laboratoire de Chimie Bactérienne (UMR7283), IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Rita R Manuel
- Instituto de Tecnologia Quimica e Biologica Antonio Xavier (ITQB NOVA), Universidade Nova de Lisboa, Oeiras, Portugal
| | - Axel Magalon
- Aix Marseille Université, CNRS, Laboratoire de Chimie Bactérienne (UMR7283), IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Christophe Léger
- CNRS, Aix Marseille Université, BIP, IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Inês A C Pereira
- Instituto de Tecnologia Quimica e Biologica Antonio Xavier (ITQB NOVA), Universidade Nova de Lisboa, Oeiras, Portugal
| | - Anne Walburger
- Aix Marseille Université, CNRS, Laboratoire de Chimie Bactérienne (UMR7283), IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
| | - Vincent Fourmond
- CNRS, Aix Marseille Université, BIP, IMM, IM2B, 31 Chemin J. Aiguier, 13009, Marseille, France
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Meneghello M, Léger C, Fourmond V. Electrochemical Studies of CO 2 -Reducing Metalloenzymes. Chemistry 2021; 27:17542-17553. [PMID: 34506631 DOI: 10.1002/chem.202102702] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Indexed: 11/07/2022]
Abstract
Only two enzymes are capable of directly reducing CO2 : CO dehydrogenase, which produces CO at a [NiFe4 S4 ] active site, and formate dehydrogenase, which produces formate at a mononuclear W or Mo active site. Both metalloenzymes are very rapid, energy-efficient and specific in terms of product. They have been connected to electrodes with two different objectives. A series of studies used protein film electrochemistry to learn about different aspects of the mechanism of these enzymes (reactivity with substrates, inhibitors…). Another series focused on taking advantage of the catalytic performance of these enzymes to build biotechnological devices, from CO2 -reducing electrodes to full photochemical devices performing artificial photosynthesis. Here, we review all these works.
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Affiliation(s)
- Marta Meneghello
- CNRS, Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, UMR 7281, Institut de Microbiologie de la Méditerranée, and, Institut Microbiologie, Bioénergies et Biotechnologie, 31 chemin J. Aiguier, 13402, Marseille Cedex 20, France
| | - Christophe Léger
- CNRS, Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, UMR 7281, Institut de Microbiologie de la Méditerranée, and, Institut Microbiologie, Bioénergies et Biotechnologie, 31 chemin J. Aiguier, 13402, Marseille Cedex 20, France
| | - Vincent Fourmond
- CNRS, Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, UMR 7281, Institut de Microbiologie de la Méditerranée, and, Institut Microbiologie, Bioénergies et Biotechnologie, 31 chemin J. Aiguier, 13402, Marseille Cedex 20, France
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