PMID: 15937492 , Related PDB ids: 2BNP, 2BNS

Authors:

Katona G, Snijder A, Gourdon P, Andreasson U, Hansson O, Andreasson LE, Neutze R

Title:

Conformational regulation of charge recombination reactions in a photosynthetic bacterial reaction center.

Journal:

Nat Struct Mol Biol. 2005 Jul;12(7):630-1. Epub 2005 Jun 5.

Abstract:

In bright light the photosynthetic reaction center (RC) of Rhodobacter sphaeroides stabilizes the P(+)(870).Q(-)(A) charge-separated state and thereby minimizes the potentially harmful effects of light saturation. Using X-ray diffraction we report a conformational change that occurs within the cytoplasmic domain of this RC in response to prolonged illumination with bright light. Our observations suggest a novel structural mechanism for the regulation of electron transfer reactions in photosynthesis.