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Superexchange coupling and electron transfer in globular proteins via polaron excitations.

Authors
Type
Published Article
Journal
Journal of biological physics
Publication Date
Volume
26
Issue
2
Pages
173–184
Identifiers
DOI: 10.1023/A:1005242707291
PMID: 23345719
Source
Medline
Keywords
License
Unknown

Abstract

The polaron approach is used to treat long-range electron transfersbetween globular proteins. A rate expression for the polaron transfer model is given along with a description of appropriate conditions forits use. Assuming that electrons transfer via a superexchange couplingdue to a polaron excitation, we have estimated the distance dependenceof the rate constant for the self-exchange reactions between globularproteins in solutions. The distance dependence of the polaron coupling andsolvent reorganization energy are provided as a basis forunderstanding and interpreting a long-range electron transfer experiment.The difficulties and problems of the polaron treatment of long-rangeelectron transfers are discussed, and suggestions for new experimentsare made.

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