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Evidence of Simultaneous Spectral Hole Burning Involving Two Tiers of the Protein Energy Landscape in Cytochrome b6f.

Author(s): Shafiei G, Levenberg A, Lujan MA, Picorel R, Zazubovich V

J Phys Chem B. 2019 Dec 12;: Authors: Shafiei G, Levenberg A, Lujan MA, Picorel R, Zazubovich V

Article GUID: 31763829
Parameters of the protein energy landscapes of several light-harvesting complexes probed via spectral hole growth kinetics measurements.

Author(s): Herascu N, Najafi M, Amunts A, Pieper J, Irrgang KD, Picorel R, Seibert M, Zazubovich V

J Phys Chem B. 2011 Mar 31;115(12):2737-47 Authors: Herascu N, Najafi M, Amunts A, Pieper J, Irrgang KD, Picorel R, Seibert M, Zazubovich V

Article GUID: 21391534
Effects of the distributions of energy or charge transfer rates on spectral hole burning in pigment-protein complexes at low temperatures.

Author(s): Herascu N, Ahmouda S, Picorel R, Seibert M, Jankowiak R, Zazubovich V

J Phys Chem B. 2011 Dec 22;115(50):15098-109 Authors: Herascu N, Ahmouda S, Picorel R, Seibert M, Jankowiak R, Zazubovich V

Article GUID: 22046956
Spectral hole burning, recovery, and thermocycling in chlorophyll-protein complexes: distributions of barriers on the protein energy landscape.

Author(s): Najafi M, Herascu N, Seibert M, Picorel R, Jankowiak R, Zazubovich V

J Phys Chem B. 2012 Sep 27;116(38):11780-90 Authors: Najafi M, Herascu N, Seibert M, Picorel R, Jankowiak R, Zazubovich V

Article GUID: 22957798
Conformational Changes in Pigment-Protein Complexes at Low Temperatures-Spectral Memory and a Possibility of Cooperative Effects.

Author(s): Najafi M, Herascu N, Shafiei G, Picorel R, Zazubovich V

J Phys Chem B. 2015 Jun 11;119(23):6930-40 Authors: Najafi M, Herascu N, Shafiei G, Picorel R, Zazubovich V

Article GUID: 25985255
A simple and efficient method to prepare pure dimers and monomers of the cytochrome b 6 f complex from spinach.

Author(s): Luján MA, Lorente P, Zazubovich V, Picorel R

Photosynth Res. 2017 Jun;132(3):305-309 Authors: Luján MA, Lorente P, Zazubovich V, Picorel R

Article GUID: 28374305
Probing Energy Landscapes of Cytochrome b6f with Spectral Hole Burning: Effects of Deuterated Solvent and Detergent.

Author(s): Levenberg A, Shafiei G, Lujan MA, Giannacopoulos S, Picorel R, Zazubovich V

J Phys Chem B. 2017 10 26;121(42):9848-9858 Authors: Levenberg A, Shafiei G, Lujan MA, Giannacopoulos S, Picorel R, Zazubovich V

Article GUID: 28956922
Title:Effects of the distributions of energy or charge transfer rates on spectral hole burning in pigment-protein complexes at low temperatures.
Authors:Herascu N,  Ahmouda S,  Picorel R,  Seibert M,  Jankowiak R,  Zazubovich V
Link:https://www.ncbi.nlm.nih.gov/pubmed/22046956?dopt=Abstract
Category:J Phys Chem B
PMID:22046956
Dept Affiliation: PHYSICS
1 Department of Physics, Concordia University, Montreal, Quebec, Canada.

Description:

Effects of the distributions of energy or charge transfer rates on spectral hole burning in pigment-protein complexes at low temperatures.

J Phys Chem B. 2011 Dec 22;115(50):15098-109

Authors: Herascu N, Ahmouda S, Picorel R, Seibert M, Jankowiak R, Zazubovich V

Abstract

Effects of the distributions of excitation energy transfer (EET) rates (homogeneous line widths) on the nonphotochemical (resonant) spectral hole burning (SHB) processes in photosynthetic chlorophyll-protein complexes (reaction center [RC] and CP43 antenna of Photosystem II from spinach) are considered. It is demonstrated that inclusion of such a distribution results in somewhat more dispersive hole burning kinetics. More importantly, however, inclusion of the EET rate distributions strongly affects the dependence of the hole width on the fractional hole depth. Different types of line width distributions have been explored, including those resulting from Förster type EET between weakly interacting pigments as well as Gaussian ones, which may be a reasonable approximation for those resulting, for instance, from so-called extended Förster models. For Gaussian line width distributions, it is possible to determine the parameters of both line width and tunneling parameter distributions from SHB data without a priori knowledge of any of them. Concerning more realistic asymmetric distributions, we demonstrate, using the simple example of CP43 antenna, that one can use SHB modeling to estimate electrostatic couplings between pigments and support or exclude assignment of certain pigment(s) to a particular state.

PMID: 22046956 [PubMed - indexed for MEDLINE]