Early Bacteriopheophytin Reduction in Charge Separation in Reaction Centers of Rhodobacter sphaeroides

J. Zhu, I.H.M. van Stokkum, L. Paparelli, M.R. Jones, M.L. Groot

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

A question at the forefront of biophysical sciences is, to what extent do quantum effects and protein conformational changes play a role in processes such as biological sensing and energy conversion? At the heart of photosynthetic energy transduction lie processes involving ultrafast energy and electron transfers among a small number of tetrapyrrole pigments embedded in the interior of a protein. In the purple bacterial reaction center (RC), a highly efficient ultrafast charge separation takes place between a pair of bacteriochlorophylls: an accessory bacteriochlorophyll (B) and bacteriopheophytin (H). In this work, we applied ultrafast spectroscopy in the visible and near-infrared spectral region to Rhodobacter sphaeroides RCs to accurately track the timing of the electron on B
Original languageEnglish
Pages (from-to)2493-2502
JournalBiophysical Journal
Volume104
Issue number11
DOIs
Publication statusPublished - 2013

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