Convergence of Theory and Experiment on the Role of Preorganization, Quantum Tunneling, and Enzyme Motions into Flavoenzyme-Catalyzed Hydride Transfer
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Otros documentos de la autoría: Delgado, Manuel; Görlich, Stefan; Scrutton, Nigel; Hay, Sam; Moliner, Vicent; Tuñón, Iñaki
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http://dx.doi.org/10.1021/acscatal.7b00201 |
Metadatos
Título
Convergence of Theory and Experiment on the Role of Preorganization, Quantum Tunneling, and Enzyme Motions into Flavoenzyme-Catalyzed Hydride TransferFecha de publicación
2017Editor
American Chemical SocietyISSN
2155-5435Cita bibliográfica
DELGADO, Manuel, et al. Convergence of Theory and Experiment on the Role of Preorganization, Quantum Tunneling, and Enzyme Motions into Flavoenzyme-Catalyzed Hydride Transfer. ACS Catalysis, 2017, vol. 7, no 5, p. 3190-3198.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/acscatal.7b00201Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Hydride transfer is one of the most common reactions catalyzed by enzymatic systems, and it has become an object of study because of possible significant quantum tunneling effects. In the present work, we provide a ... [+]
Hydride transfer is one of the most common reactions catalyzed by enzymatic systems, and it has become an object of study because of possible significant quantum tunneling effects. In the present work, we provide a combination of theoretical QM/MM simulations and experimental measurements of the rate constants and kinetic isotopic effects (KIEs) for the hydride transfer reaction catalyzed by morphinone reductase, MR. Quantum mechanical tunneling coefficients, computed in the framework of variational transition-state theory, play a significant role in this reaction, reaching values of 23.8 ± 5.5 for the lightest isotopologue—one of the largest values reported for enzymatic systems. This prediction is supported by the agreement between the theoretically predicted rate constants and the corresponding experimental values. Simulations indicate that the role of protein motions can be satisfactorily described as equilibrium fluctuations along the reaction coordinate, in line with a high degree of preorganization displayed by this enzyme. [-]
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ACS Catalysis, 2017, vol. 7, no 5Proyecto de investigación
Spanish Ministerio de Economia y Competitividad / CTQ2015-66223-C2); Universitat Jaume I / project P1·1B2014-26; Generalitat Valenciana / PROMETEOII/2014/022; U.K. Biotechnology and Biological Sciences Research Council / BBSRC; BB/ M007065/1 and BB/H021523/1); N.S.S is an Engineering and Physical Sciences Research Council (EPSRC) Established Career Research Fellow / EP/J020192/1Derechos de acceso
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