Encyclopedia of Biophysics

Living Edition
| Editors: Gordon Roberts, Anthony Watts, European Biophysical Societies

Gated Electron Transfer

  • Victor L. Davidson
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-35943-9_15-1

Synonyms

Definition

Gated electron transfer is a process in which a relatively slow nonelectron transfer reaction is required to activate the system for a much faster true electron transfer reaction.

Basic Characteristics

Gated electron transfer occurs when a relatively slow adiabatic (nonelectron transfer) reaction precedes a faster nonadiabatic (true electron transfer) reaction, and the slower reaction is required to activate the system for electron transfer. If the rates of these two sequential reactions cannot be kinetically distinguished, then the observed rate constant ( k obs) for the redox reaction will not be the true electron transfer rate constant ( k ET). Instead it will be the rate constant for the preceding slower reaction step. Gated electron transfer could occur in a bimolecular electron transfer reaction in which some rearrangement of reactants must occur after initial binding to optimize the system for electron transfer (Eq. 1), or it could occur during...
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References

  1. Baddam S, Bowler BE (2005) Confermationally gated electron transfer in iso-1-cytochrome c: engineering a rate of a conformational switch. J Am Chem Soc 127:9702–9703CrossRefPubMedGoogle Scholar
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Copyright information

© European Biophysical Societies' Association (EBSA) 2018

Authors and Affiliations

  1. 1.Burnett School of Biomedical Sciences, College of MedicineUniversity of Central FloridaOrlandoUSA