title: Mechanisms for control of biological electron transfer reactions.
abstract: Electron transfer (ET) through and between proteins is a fundamental biological process. The rates and mechanisms of these ET reactions are controlled by the proteins in which the redox centers that donate and accept electrons reside. The protein influences the magnitudes of the ET parameters, the electronic coupling and reorganization energy that are associated with the ET reaction. The protein can regulate the rates of the ET reaction by requiring reaction steps to optimize the system for ET, leading to kinetic mechanisms of gated or coupled ET. Amino acid residues in the segment of the protein through which long range ET occurs can also modulate the ET rate by serving as staging points for hopping mechanisms of ET. Specific examples are presented to illustrate these mechanisms by which proteins control rates of ET reactions.
authors.affiliation: Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, United States.
authors.forename: Heather R
authors.initials: HR
authors.lastname: Williamson
authors.affiliation: Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, United States.
authors.forename: Brian A
authors.initials: BA
authors.lastname: Dow
authors.affiliation: Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, United States. Electronic address: victor.davidson@ucf.edu.
authors.forename: Victor L
authors.initials: VL
authors.lastname: Davidson
mesh_terms: D000818:Animals; D004579:Electron Transport; D004583:Electrons; D006801:Humans; D007700:Kinetics; D008958:Models, Molecular; D011506:Proteins / Q000737:chemistry / Q000378:metabolism*
chemical_list: D011506:Proteins
keywords: Amicyanin; Coupled electron transfer; Electronic coupling; Gated electron transfer; Hole hopping; MauG; Quinoprotein; Reorganization energy
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