Frequency-domain spectroscopic study of the photosystem I supercomplexes, isolated isia monomers, and the intact isia ring

T Reinot, A Khmelnitskiy, V Zazubovich… - The Journal of …, 2022 - ACS Publications
The PSI3–IsiA18 supercomplex is one of the largest and most complicated assemblies in
photosynthesis. The IsiA ring, composed of 18 IsiA monomers (IsiA18) surrounding the PSI …

Identification of Residues Potentially Involved in Optical Shifts in the Water-Soluble Chlorophyll a-Binding Protein through Molecular Dynamics Simulations

M Mai, V Zazubovich, RA Mansbach - The Journal of Physical …, 2024 - ACS Publications
Reversible light and thermally induced spectral shifts are universally observed in a wide
variety of pigment–protein complexes at temperatures ranging from cryogenic to ambient. In …

Spectral hole burning in cyanobacterial photosystem I with P700 in oxidized and neutral states

N Herascu, MS Hunter, G Shafiei, M Najafi… - The Journal of …, 2016 - ACS Publications
We explored the rich satellite hole structures emerging as a result of spectral hole burning in
cyanobacterial photosystem I (PSI) and demonstrated that hole burning properties of PSI …

Monte Carlo Modeling of Spectral Diffusion Employing Multiwell Protein Energy Landscapes: Application to Pigment–Protein Complexes Involved in Photosynthesis

M Najafi, V Zazubovich - The Journal of Physical Chemistry B, 2015 - ACS Publications
We are reporting development and initial applications of the light-induced and thermally
induced spectral diffusion modeling software, covering nonphotochemical spectral hole …

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

G Shafiei, A Levenberg, MA Lujan… - The Journal of …, 2019 - ACS Publications
Cytochrome b 6 f, with one chlorophyll molecule per protein monomer, is a simple model
system whose studies can help achieve a better understanding of nonphotochemical …

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

A Levenberg, G Shafiei, MA Lujan… - The Journal of …, 2017 - ACS Publications
In non-photochemical spectral hole burning (NPHB) and spectral hole recovery
experiments, cytochrome b 6 f protein exhibits behavior that is almost independent of the …

Effects of chlorophyll triplet states on the kinetics of spectral hole growth

A Trempe, A Levenberg, ADG Ortega… - The Journal of …, 2021 - ACS Publications
Spectral hole burning has been employed for decades to study various amorphous solids
and proteins. Triplet states and respective transient holes were incorporated into theoretical …

Molecular Dynamics Simulations of the Water-Soluble Chlorophyll-binding Protein: Identifying Structural Features Responsible for Spectral Dynamics

M Mai - 2023 - spectrum.library.concordia.ca
Photosynthesis is the process responsible for nearly all life on Earth. Pigment-protein
complexes, fundamental components of photosynthesis, are the subject of many studies to …

How Well Does the Hole-Burning Action Spectrum Represent the Site-Distribution Function of the Lowest-Energy State in Photosynthetic Pigment–Protein Complexes …

V Zazubovich, R Jankowiak - The Journal of Physical Chemistry B, 2019 - ACS Publications
For the first time, we combined Monte Carlo and nonphotochemical hole burning (NPHB)
master equation approaches to allow for ultrahigh-resolution (< 0.005 cm–1, smaller than …

A simple and efficient method to prepare pure dimers and monomers of the cytochrome b 6 f complex from spinach

MA Luján, P Lorente, V Zazubovich, R Picorel - Photosynthesis Research, 2017 - Springer
Using a single size-exclusion chromatography we were able to isolate highly pure dimers
and monomers of the Cyt b 6 f complex from spinach from a bulk preparation of that protein …