DOI: 10.1073/pnas.96.20.11271. The dynamics of structural deformations of immobilized single light-harvesting complexes [Penn]

The dynamics of structural deformations of immobilized single light-harvesting complexes

10.1073/pnas.96.20.11271

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Single assemblies of the intact light-harvesting complex LH2 from Rhodopseudomonas acidophila were bound to mica surfaces at 300 K and examined by observing their fluorescence after polarized light excitation. The complexes are generally not cylindrically symmetric. They act like elliptic absorbers, indicating that the high symmetry found in crystals of LH2 is not present when the molecules are immobilized on mica. The ellipticity and the principal axes of the ellipses fluctuate on the time scale of seconds, indicating that there is a mobile structural deformation. The B850 ring of cofactors shows significantly less asymmetry than B800. The photobleaching strongly depends on the presence of oxygen.

Bibliography

Bopp, M. A., Sytnik, A., Howard, T. D., Cogdell, R. J., & Hochstrasser, R. M. (1999). The dynamics of structural deformations of immobilized single light-harvesting complexes. Proceedings of the National Academy of Sciences, 96(20), 11271â11276.

Authors 5

Martin A. Bopp (first)
Alexander Sytnik (additional)
Tina D. Howard (additional)
Richard J. Cogdell (additional)
Robin M. Hochstrasser (additional)

References 21 Referenced 150

10.1038/374517a0
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N J Turro Modern Molecular Photochemistry (University Science Books, Mill Valley, CA, 1991). / Modern Molecular Photochemistry by Turro N J (1991)
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10.1063/1.476924

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:38 a.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 3:54 p.m.)
Indexed	1 month ago (July 28, 2025, 5:30 p.m.)
Issued	25 years, 11 months ago (Sept. 28, 1999)
Published	25 years, 11 months ago (Sept. 28, 1999)
Published Online	25 years, 11 months ago (Sept. 28, 1999)
Published Print	25 years, 11 months ago (Sept. 28, 1999)

Funders 0

None

BibTeX

@article{Bopp_1999, title={The dynamics of structural deformations of immobilized single light-harvesting complexes}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.20.11271}, DOI={10.1073/pnas.96.20.11271}, number={20}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Bopp, Martin A. and Sytnik, Alexander and Howard, Tina D. and Cogdell, Richard J. and Hochstrasser, Robin M.}, year={1999}, month=sep, pages={11271–11276} }

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