Reorganization energies of the electron transfer reactions involving quinones in the reaction center of Rhodobacter sphaeroides

Photosynthesis Research
Vasily V Ptushenko, Lev I Krishtalik

Abstract

In framework of the continuum electrostatics theory, the reorganization energies of the electron transfers QA--QB (fast phase), Bph--QA, P+-QA-, and P+-QB- in the photosynthetic bacterial reaction center have been calculated. The calculations were based on the static dielectric permittivity spatial distribution derived from the data on the electrogenesis, with the corresponding characteristic times relatively close to the reaction times of QA--QB (fast phase) and Bph--QA but much shorter than those times of the latter two recombination reactions. The calculated reorganization energies were reasonably close to the experimental estimates for QA--QB (fast phase) and Bph--QA but substantially lower than those of P+-QA- and P+-QB-. A higher effective dielectric permittivity contributes to this effect, but the dominant contribution is most probably made by a non-dielectric relaxation, especially for the P+-QB- recombination influenced by the proton transfer. This situation calls for reconsidering of the current electron transfer rate estimates.

References

Jan 1, 1992·Annual Review of Biochemistry·M Y Okamura, G Feher
Mar 1, 1991·Biophysical Journal·T SimonsonA T Brünger
Sep 1, 1988·Protein Engineering·H NakamuraA Wada
Nov 1, 1986·Biopolymers·M K Gilson, B H Honig
Dec 1, 1980·Biochimica Et Biophysica Acta·J Jortner
Feb 14, 1995·Proceedings of the National Academy of Sciences of the United States of America·T Simonson, D Perahia
Sep 30, 1998·Proceedings of the National Academy of Sciences of the United States of America·M S GraigeM Y Okamura
Feb 19, 2000·Proceedings of the National Academy of Sciences of the United States of America·E L Mertz, L I Krishtalik
Feb 10, 2004·Frontiers in Bioscience : a Journal and Virtual Library·Colin A Wraight
May 17, 2008·Photosynthesis Research·Vasily V PtushenkoAlexey Yu Semenov
Jan 25, 2011·Physical Chemistry Chemical Physics : PCCP·Raffaele Borrelli, Andrea Peluso
Jul 23, 2011·Biochimica Et Biophysica Acta·Lev I Krishtalik

❮ Previous
Next ❯

Citations

Jul 16, 2019·Photosynthesis Research·Vasily V PtushenkoMikhail P Kirpichnikov
Oct 14, 2020·Biochemistry. Biokhimii︠a︡·V V Ptushenko
Nov 25, 2020·The Journal of Physical Chemistry. B·Bryan KudischGregory D Scholes

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
electron paramagnetic resonance

Software Mentioned

PARSE
DelPhi
HBUILD

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.