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Low-temperature protein dynamics of the B800 molecules in the LH2 light-harvesting complex: spectral hole burning study and comparison with single photosynthetic complex spectroscopy.

Author(s): Grozdanov D, Herascu N, Reinot T, Jankowiak R, Zazubovich V

J Phys Chem B. 2010 Mar 18;114(10):3426-38 Authors: Grozdanov D, Herascu N, Reinot T, Jankowiak R, Zazubovich V

Article GUID: 20166717
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
Modeling of various optical spectra in the presence of slow excitation energy transfer in dimers and trimers with weak interpigment coupling: FMO as an example.

Author(s): Herascu N, Kell A, Acharya K, Jankowiak R, Blankenship RE, Zazubovich V

J Phys Chem B. 2014 Feb 27;118(8):2032-40 Authors: Herascu N, Kell A, Acharya K, Jankowiak R, Blankenship RE, Zazubovich V

Article GUID: 24506338
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
Spectral Hole Burning in Cyanobacterial Photosystem I with P700 in Oxidized and Neutral States.

Author(s): Herascu N, Hunter MS, Shafiei G, Najafi M, Johnson TW, Fromme P, Zazubovich V

J Phys Chem B. 2016;120(40):10483-10495 Authors: Herascu N, Hunter MS, Shafiei G, Najafi M, Johnson TW, Fromme P, Zazubovich V

Article GUID: 27661089
Title:Modeling of various optical spectra in the presence of slow excitation energy transfer in dimers and trimers with weak interpigment coupling: FMO as an example.
Authors:Herascu N,  Kell A,  Acharya K,  Jankowiak R,  Blankenship RE,  Zazubovich V
Link:https://www.ncbi.nlm.nih.gov/pubmed/24506338?dopt=Abstract
Category:J Phys Chem B
PMID:24506338
Dept Affiliation: PHYSICS
1 Department of Physics, Concordia University , Montreal, H4B 1R6 Quebec, Canada.

Description:

Modeling of various optical spectra in the presence of slow excitation energy transfer in dimers and trimers with weak interpigment coupling: FMO as an example.

J Phys Chem B. 2014 Feb 27;118(8):2032-40

Authors: Herascu N, Kell A, Acharya K, Jankowiak R, Blankenship RE, Zazubovich V

Abstract

We present an improved simulation methodology to describe nonphotochemical hole-burned (NPHB) spectra. The model, which includes both frequency-dependent excitation energy transfer (EET) rate distributions and burning following EET, provides reasonable fits of various optical spectra including resonant and nonresonant holes in the case of FMO complex. A qualitative description of the NPHB process in light of a very complex protein energy landscape is briefly discussed. As an example, we show that both resonant and nonresonant HB spectra obtained for the 825 nm band of the trimeric FMO of C. tepidum are consistent with the presence of a relatively slow EET between the lowest energy states of the monomers of the trimer (mostly localized on BChl a 3), with a weak (~1 cm(-1)) coupling between these states revealed via calculated emission spectra. We argue that the nature of the so-called 825 nm absorption band of the FMO trimer, contrary to the presently accepted consensus, cannot be explained by a single transition.

PMID: 24506338 [PubMed - indexed for MEDLINE]