A simple approach to the solvent reorganisation Gibbs free energy in electron transfer reactions of redox metalloproteins

Jens Ulstrup

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We discuss a simple model for the environmental reorganisation Gibbs free energy, E-r, in electron transfer between a metalloprotein and a small reaction partner. The protein is represented as a dielectric globule with low dielectric constant, the metal centres as conducting spheres, all embedded in a continuous solvent with high dielectric constant. This model has previously reproduced thermodynamic metalloprotein properties. E-r takes an analytic form expressed by a continuous image charge distribution, and depends weakly on the globular radius, indicating that repolarisation at the globule/solvent interface contributes less to these effects than to the work terms and driving force. (C) 1999 Elsevier Science B.V. All rights reserved.
Original languageEnglish
JournalChemical Physics Letters
Volume303
Issue number3-4
Pages (from-to)320-324
ISSN0009-2614
DOIs
Publication statusPublished - 1999

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