DOI: 10.1042/bj2700469. The contribution of the carotenoid to the visible circular dichroism of the light-harvesting antenna of <i>Rhodospirillum rubrum</i>

The contribution of the carotenoid to the visible circular dichroism of the light-harvesting antenna of Rhodospirillum rubrum

10.1042/bj2700469

Crossref journal-article

Portland Press Ltd.

Biochemical Journal (288)

Abstract

The visible c.d. spectrum of wild-type Rhodospirillum rubrum shows positive bands [Dratz, Schultz & Sauer (1966) Brookhaven Symp. Biol. 19, 303-318] that are largely due to the B880 antenna pigments, bacteriochlorophyll a and carotenoids. The bacteriochlorophyll c.d. band was absent from the spectrum of R. rubrum G9, a mutant unable to synthesize coloured carotenoids, and could be partly restored by adding extracted carotenoids to freeze-dried membrane vesicles isolated from that mutant. Therefore it seems to arise from either bacteriochlorophyll-carotenoid interactions or bacteriochlorophyll-protein interactions that are induced by the carotenoid. The more complex carotenoid c.d. band had different shapes in native and reconstituted carotenoid-containing membranes. Such differences suggest that the optical activity of the carotenoid in the B880 antenna arises from both non-degenerate and degenerate interactions.

Bibliography

Lozano, R. M., FernÃ¡ndez-Cabrera, C., & RamÃrez, J. M. (1990). The contribution of the carotenoid to the visible circular dichroism of the light-harvesting antenna of Rhodospirillum rubrum. Biochemical Journal, 270(2), 469â472.

Authors 3

R M Lozano (first)
C Fernández-Cabrera (additional)
J M Ramírez (additional)

References 0 Referenced 6

None

Dates

Type	When
Created	10 years ago (Aug. 10, 2015, 5:17 p.m.)
Deposited	3 years, 9 months ago (Nov. 25, 2021, 1:48 p.m.)
Indexed	2 months, 1 week ago (June 26, 2025, 3:26 a.m.)
Issued	35 years ago (Sept. 1, 1990)
Published	35 years ago (Sept. 1, 1990)
Published Print	35 years ago (Sept. 1, 1990)

Funders 0

None

BibTeX

@article{Lozano_1990, title={The contribution of the carotenoid to the visible circular dichroism of the light-harvesting antenna of Rhodospirillum rubrum}, volume={270}, ISSN={1470-8728}, url={http://dx.doi.org/10.1042/bj2700469}, DOI={10.1042/bj2700469}, number={2}, journal={Biochemical Journal}, publisher={Portland Press Ltd.}, author={Lozano, R M and Fernández-Cabrera, C and Ramírez, J M}, year={1990}, month=sep, pages={469–472} }

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