Charge Separation is Virtually Irreversible in Photosystem II Core Complexes with Oxidized Primary Quinone Acceptor

C.D. van der Weij-de Wit, J.P. Dekker, R. van Grondelle, I.H.M. van Stokkum

Research output: Contribution to JournalArticle

Abstract

X-ray structures of the Photosystem II (PSII) core revealed relatively large interpigment distances between the CP43 and CP47 antenna complexes and the reaction center (RC) with respect to the interpigment distances in a single unit. This finding questions the possibility of fast energy equilibration among the antenna and the RC, which has been the basic explanation for the measured PSII fluorescence kinetics for more than two decades. In this study, we present time-resolved fluorescence measurements obtained with a streak-camera setup on PSII core complexes from Thermosynechococcus elongatus at room temperature (RT) and at 77 K. Kinetic modeling of the RT data obtained with oxidized quinone acceptor Q
Original languageEnglish
Pages (from-to)3947-3956
Number of pages10
JournalJournal of Physical Chemistry A
Volume115
Issue number16
DOIs
Publication statusPublished - 2011

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