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Tuning electron transfer by ester‐group of chlorophylls in bacterial photosynthetic reaction center
Author(s) -
Ishikita Hiroshi,
Loll Bernhard,
Biesiadka Jacek,
Galstyan Artur,
Saenger Wolfram,
Knapp Ernst-Walter
Publication year - 2005
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2004.12.049
Subject(s) - photosynthetic reaction centre , redox , electron transfer , chemistry , photosynthesis , chlorophyll a , electron transport chain , photochemistry , chlorophyll , electron donor , center (category theory) , crystallography , biochemistry , organic chemistry , catalysis
Accessory chlorophylls (B A/B ) in bacterial photosynthetic reaction center play a key role in charge‐separation. Although light‐exposed and dark‐adapted bRC crystal structures are virtually identical, the calculated B A redox potentials for one‐electron reduction differ. This can be traced back to different orientations of the B A ester‐group. This tuning ability of chlorophyll redox potentials modulates the electron transfer from SP* to B A .