A new pathway for transmembrane electron transfer in photosyntetic reaction centers of Rhodobacter sphaeroides not involving the excited special pair.

M.E. van Brederode, M.R. Jones, F. van Mourik, I.H.M. van Stokkum, R. van Grondelle

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

It is generally accepted that electron transfer in bacterial photosynthesis is driven by the first singlet excited state of a special pair of bacteriochlorophylls (P*). We have examined the first steps of electron transfer in a mutant of the Rhodobacter sphaeroides reaction center in which charge separation from P* is dramatically slowed down. The results provide for the first time clear evidence that excitation of the monomeric bacteriochlorophyll in the active branch of the reaction center (B(A)) drives ultrafast transmembrane electron transfer without the involvement of P*, demonstrating a new and efficient mechanism for solar energy transduction in photosynthesis. The most abundant charge-separated intermediate state probably is P
Original languageEnglish
Pages (from-to)6855-6861
JournalBiochemistry
Volume36
DOIs
Publication statusPublished - 1997

Fingerprint

Dive into the research topics of 'A new pathway for transmembrane electron transfer in photosyntetic reaction centers of Rhodobacter sphaeroides not involving the excited special pair.'. Together they form a unique fingerprint.

Cite this