Spectroscopic Properties and Electron Transfer Dynamics of Reaction Centers

1988 ◽  
pp. 309-317 ◽  
Author(s):  
W. Parson ◽  
A. Warshel ◽  
S. Creighton ◽  
J. Norris
Keyword(s):  
Electron Transfer ◽  
Spectroscopic Properties ◽  
Reaction Centers

Reduction of the oxidized bacteriochlorophyll dimer in reaction centers by ferrocene is dependent upon the driving force

2007 ◽  
Vol 11 (03) ◽  
pp. 205-211 ◽  
Author(s):  
László Kálmán ◽  
Arlene L. M. Haffa ◽  
JoAnn C. Williams ◽  
Neal W. Woodbury ◽  
James P. Allen
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Ph Dependence ◽  
Photosynthetic Bacterium ◽  
Energy Difference ◽  
Reaction Centers ◽  
Free Energy Difference ◽  
Midpoint Potential ◽  
Bacteriochlorophyll Dimer ◽  
Purple Photosynthetic Bacterium

The rates of electron transfer from ferrocene to the oxidized bacteriochlorophyll dimer, P , in reaction centers from the purple photosynthetic bacterium Rhodobacter sphaeroides, were measured for a series of mutants in which the P / P + midpoint potentials range from 410 to 765 mV (Lin et al. Proc. Natl. Acad. Sci. USA 1994; 91: 10265-10269). The observed rate constant for each mutant was found to be linearly dependent upon the ferrocene concentration up to 50 μM. The electron transfer is described as a second order reaction with rate constants increasing from 1.5 to 35 × 106 M -1. s -1 with increasing P / P + midpoint potential. This dependence was tested for three additional mutants, each of which exhibits a pH dependence of the P / P + midpoint potential due to an electrostatic interaction with an introduced carboxylic group (Williams et al. Biochemistry 2001; 40: 15403-15407). For these mutants, the pH dependence of the bimolecular rate constants followed a sigmoidal pattern that could be described with a Henderson-Hasselbalch equation, attributable to the change of the free energy difference for the reaction due to deprotonation of the introduced carboxylic side chains.

Mechanism of photoinduced electron transfer in photosystem II reaction centers

BIOPHYSICS ◽  
2007 ◽  
Vol 52 (1) ◽  
pp. 40-45 ◽  
Author(s):  
I. B. Klenina ◽  
W. O. Feikema ◽  
P. Gast ◽  
M. G. Zvereva ◽  
I. I. Proskuryakov
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Photoinduced Electron Transfer ◽  
Reaction Centers

Analysis of Kinetics of Electron Transfer in the Reaction Centers of Photosynthetic Bacteria Using the Rips—Jortner Model

2005 ◽  
Vol 405 (1-6) ◽  
pp. 461-464 ◽  
Author(s):  
A. I. Kotel'nikov ◽  
N. S. Goryachev ◽  
A. Yu. Rubtsov ◽  
B. L. Psikha ◽  
J. M. Ortega
Keyword(s):  
Electron Transfer ◽  
Photosynthetic Bacteria ◽  
Reaction Centers ◽  
Kinetics Of

scholarly journals Species differences in unlocking B-side electron transfer in bacterial reaction centers

FEBS Letters ◽  
2016 ◽  
Vol 590 (16) ◽  
pp. 2515-2526 ◽  
Author(s):  
Nicholas P. Dylla ◽  
Kaitlyn M. Faries ◽  
Ryan M. Wyllie ◽  
Angela M. Swenson ◽  
Deborah K. Hanson ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Species Differences ◽  
Reaction Centers ◽  
Bacterial Reaction Centers
Sign in / Sign up

Export Citation Format

Share Document