ENDOR and pulsed EPR studies of photosynthetic reaction centers: Protein-cofactor interactions

1996 ◽  
Vol 100 (12) ◽  
pp. 2036-2040 ◽  
Author(s):  
F. Lendzian ◽  
J. Rautter ◽  
H. Käß ◽  
A. Gardine ◽  
W. Lubitz
Keyword(s):  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Pulsed Epr

scholarly journals Local water sensing: water exchange in bacterial photosynthetic reaction centers embedded in a trehalose glass studied using multiresonance EPR

2017 ◽  
Vol 19 (41) ◽  
pp. 28388-28400 ◽  
Author(s):  
Anna Nalepa ◽  
Marco Malferrari ◽  
Wolfgang Lubitz ◽  
Giovanni Venturoli ◽  
Klaus Möbius ◽  
...  
Keyword(s):  
Reaction Center ◽  
Water Exchange ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Bacterial Reaction Center ◽  
Pulsed Epr ◽  
Local Water ◽  
Water Sensing

Pulsed EPR spectroscopies and isotope labeled water are applied to detect and quantify the local water in a bacterial reaction center embedded into a trehalose glass.

Pulsed EPR detection of light-generated nuclear coherences in photosynthetic reaction centers

1998 ◽  
Vol 283 (1-2) ◽  
pp. 51-60 ◽  
Author(s):  
Gerd Kothe ◽  
Michael Bechtold ◽  
Gerhard Link ◽  
Ernst Ohmes ◽  
Jörg-Ulrich Weidner
Keyword(s):  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Pulsed Epr

scholarly journals Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yin Song ◽  
Riley Sechrist ◽  
Hoang H. Nguyen ◽  
William Johnson ◽  
Darius Abramavicius ◽  
...  
Keyword(s):  
Reaction Center ◽  
Charge Separation ◽  
Electronic Spectroscopy ◽  
Spectroscopic Studies ◽  
Primary Electron ◽  
Reaction Centers ◽  
Separation Mechanism ◽  
Photosynthetic Reaction Centers ◽  
Density Analysis ◽  
Function Relationship

AbstractPhotochemical reaction centers are the engines that drive photosynthesis. The reaction center from heliobacteria (HbRC) has been proposed to most closely resemble the common ancestor of photosynthetic reaction centers, motivating a detailed understanding of its structure-function relationship. The recent elucidation of the HbRC crystal structure motivates advanced spectroscopic studies of its excitonic structure and charge separation mechanism. We perform multispectral two-dimensional electronic spectroscopy of the HbRC and corresponding numerical simulations, resolving the electronic structure and testing and refining recent excitonic models. Through extensive examination of the kinetic data by lifetime density analysis and global target analysis, we reveal that charge separation proceeds via a single pathway in which the distinct A0 chlorophyll a pigment is the primary electron acceptor. In addition, we find strong delocalization of the charge separation intermediate. Our findings have general implications for the understanding of photosynthetic charge separation mechanisms, and how they might be tuned to achieve different functional goals.

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