Dependence of enzyme reaction mechanism on protonation state of titratable residues and QM level description: lactate dehydrogenase

Abstract

We have studied the dependence of the chemical reaction mechanism of L-lactate dehydrogenase (LDH) on the protonation state of titratable residues and on the level of the quantum mechanical (QM) description by means of hybrid quantum-mechanical/molecular-mechanical (QM/MM) methods; this methodology has allowed clarification of the timing of the hydride transfer and proton transfer components that hitherto had not been possible to state definitively.Ferrer Castillo, Silvia, [email protected], Silla Santos, Estanislao, [email protected] ; Tuñon Garcia de Vicuña, Ignacio Nilo, [email protected]