Photosynthetic diode: Electron transport rectification by wetting the quinone cofactor

Daniel R. Martin, Dmitry Matyushov

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We report 11 μs of molecular dynamics simulations of the electron-transfer reaction between primary and secondary quinone cofactors in the bacterial reaction center. The main question addressed here is the mechanistic reason for unidirectional electron transfer between chemically identical cofactors. We find that electron is trapped at the secondary quinone by wetting of the protein pocket following electron transfer on the time-scale shorter than the backward transition. This mechanism provides effective rectification of the electron transport, making the reaction center a molecular diode operating by cyclic charge-induced electrowetting.

Original languageEnglish (US)
Pages (from-to)22523-22528
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume17
Issue number35
DOIs
StatePublished - Jul 6 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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