Optimized oxidoreductases for medium and large scale industrial biotransformations
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Project Secretariat
Dr Marta Pérez-Boada
E-mail: MPBoada@cib.csic.es
Consejo Superior de Investigaciones Científicas (CSIC)
Biological Research Centre (CIB)
Calle Ramiro de Maeztu 9, E-28040 Madrid, Spain
Phone: 34 918373112
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publications
Total records: 113
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[ 2017 ] Acebes S, Ruiz-Dueñas FJ, Toubes M, Saez-Jimenez V, Pérez-Boada M, Lucas F, Martínez AT, Guallar V Mapping the Long-Range Electron Transfer Route in Ligninolytic Peroxidases J. Phys. Chem. B, 121: 3946-3954
[ 2017 ] Alcalde M When directed evolution met ancestral enzyme resurrection Microbial Biotechnol., 10: 22-24
[ 2017 ] Ayuso-Fernández I, Martínez AT, Ruiz-Dueñas FJ Experimental recreation of the evolution of lignin-degrading enzymes from the Jurassic to date Biotechnol. Biofuels, 10: 67
[ 2017 ] Carro J, Martínez A, Medina M, Martínez AT, Ferreira P Protein dynamics promote hydride tunnelling in substrate oxidation by aryl-alcohol oxidase Phys. Chem. Chem. Phys., doi: 10.1039/C7CP05904C
[ 2017 ] González-Pérez D, Alcalde M The making of versatile peroxidase by directed evolution Biocatalysis and Biotransformation, doi: 10.1080/10242422.2017.1363190
[ 2017 ] Gygli G, Lucas F, Guallar V, van Berkel WJ The ins and outs of vanillyl alcohol oxidase: Identification of ligand migration paths PLoS Comput. Biol., 13
year2017
Protein dynamics promote hydride tunnelling in substrate oxidation by aryl-alcohol oxidase
Carro J, Martínez A, Medina M, Martínez AT, Ferreira P
Phys. Chem. Chem. Phys., doi: 10.1039/C7CP05904C

The temperature dependence of hydride transfer from the substrate to the N5 of the FAD cofactor during the reductive half-reaction of Pleurotus eryngii aryl-alcohol oxidase (AAO) is assessed here. Kinetic isotope effects on both the pre-steady state reduction of the enzyme and its steady-state kinetics, with differently deuterated substrates, suggest an environmentally-coupled quantum-mechanical tunnelling process. Moreover, those kinetic data, along with the crystallographic structure of the enzyme in complex with a substrate analogue, indicate that AAO shows a pre-organized active site that would only require the approaching of the hydride donor and acceptor for the tunnelled transfer to take place. Modification of the enzyme’s active-site architecture by replacement of Tyr92, a residue establishing hydrophobic interactions with the substrate analogue in the crystal structure, in the Y92F, Y92L and Y92W variants resulted in different temperature dependence patterns that indicated a role of this residue in modulating the transfer reaction.

Official webpage of indox [ industrialoxidoreductases ]. Optimized oxidoreductases for medium and large scale industrial biotransformations. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under Grant Agreement nº: FP7-KBBE-2013-7-613549. © indox 2013. Developed by garcíarincón