The exciton origin of the visible circular dichroism spectrum of bacteriorhodopsin

The Journal of Physical Chemistry. B
Gennaro Pescitelli, Robert W Woody

Abstract

The visible CD spectrum of bacteriorhodpsin (bR) in purple membrane has a negative CD band at ~600 nm and a positive band at ~530 nm and has been variously interpreted as resulting from exciton coupling within the bR trimer, heterogeneity in protein conformation, or the presence of two distinct low-energy electronic transitions in bR. We have performed time-dependent density functional theory (TDDFT) calculations on the protonated Schiff base of retinal (retPSB) in bR to predict the intrinsic CD. The resulting spectroscopic parameters have been used to predict the long-wavelength CD spectrum of retPSB trimers. TDDFT, exciton theory, and classical polarizability (DeVoe) predict a strong negative couplet centered near 570 nm, with a magnitude in good agreement with experiment. Coupling of the retPSB chromophore with aromatic and peptide chromophores has been considered by means of perturbation theory and is responsible for the net positive CD of the 570 nm band. The visible CD spectrum of bR is dominated by exciton interactions.

References

Apr 25, 1977·Biochemical and Biophysical Research Communications·M YoshidaY Kagawa
May 25, 1977·Journal of Molecular Biology·T G EbreyB Honig
Jul 1, 1976·Proceedings of the National Academy of Sciences of the United States of America·R Mathies, L Stryer
Mar 8, 1976·Biochemical and Biophysical Research Communications·B Becher, T G Ebrey
Apr 22, 1976·Nature·A LewisG J Perreault
Aug 17, 1973·European Journal of Biochemistry·D Oesterhelt, B Hess
Dec 1, 1981·Proceedings of the National Academy of Sciences of the United States of America·M A El-SayedJ M Fukumoto
Aug 1, 1980·Proceedings of the National Academy of Sciences of the United States of America·G I KingB P Schoenborn
Apr 1, 1982·Biophysical Journal·R E Godfrey
Feb 9, 1993·Biochemistry·G J TurnerR M Stroud
Sep 15, 1988·Physical Review A: General Physics·A D Becke
Aug 24, 1999·Journal of Molecular Biology·H LueckeJ K Lanyi
Aug 26, 2004·Journal of Molecular Biology·Tetsuji OkadaVolker Buss
Dec 18, 2004·Proceedings of the National Academy of Sciences of the United States of America·Tadeusz AndruniówMassimo Olivucci
May 18, 2005·Journal of Photochemistry and Photobiology. B, Biology·Hiroto Tachikawa, Hiroshi Kawabata
Nov 8, 2005·Journal of Computational Chemistry·Carlos Silva LópezAngel R de Lera
Nov 10, 2005·Chemical Reviews·Andreas Dreuw, Martin Head-Gordon
Feb 16, 2006·Amino Acids·E KarnaukhovaR K Crouch
Jul 1, 1989·Proceedings of the National Academy of Sciences of the United States of America·M A El-SayedW R Mason
Jun 15, 2006·Amino Acids·E KarnaukhovaB Golding
Jul 21, 2006·The Journal of Physical Chemistry. B·M WankoM Elstner
Aug 31, 2006·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Adélia J A AquinoHans Lischka
Oct 18, 2006·The Journal of Chemical Physics·Ranylson M L SavedraMilan Trsic
Oct 18, 2006·Journal of Computer-aided Molecular Design·Marius WankoMarcus Elstner
Jan 5, 2007·The Journal of Physical Chemistry. a·Robert Send, Dage Sundholm
Jun 1, 2007·Physical Chemistry Chemical Physics : PCCP·Robert Send, Dage Sundholm
Apr 19, 2008·Journal of the American Chemical Society·Gennaro PescitelliRobert W Woody
May 14, 2008·The Journal of Physical Chemistry. B·Ahmet AltunKeiji Morokuma
Apr 1, 1985·Biophysical Journal·J E Draheim, J Y Cassim

❮ Previous
Next ❯

Citations

Jun 14, 2013·Physical Chemistry Chemical Physics : PCCP·Sorana IonescuMihaela Hillebrand
Aug 1, 2012·ChemistryOpen·Barry Moore, Jochen Autschbach
Apr 12, 2015·Biophysical Journal·Meaghan E WardVladimir Ladizhansky
Jun 28, 2012·Biophysical Journal·Takashi TsukamotoMakoto Demura
Sep 24, 2014·The Journal of Physical Chemistry. B·Gennaro PescitelliRobert W Woody
Jun 13, 2014·The Journal of Physical Chemistry. a·Masamitsu WakabayashiShinichiro Nakamura
Aug 6, 2020·The Journal of Chemical Physics·Kazuhiro J Fujimoto, Keiichi Inoue
Feb 3, 2021·The Journal of Physical Chemistry. B·H Christopher FryAndrew L Ferguson
May 13, 2020·Biophysical Journal·Ayumi YamamotoKoichiro Ishimori

❮ Previous
Next ❯

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.