Please use this identifier to cite or link to this item:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Spectral, Photophysical, and Stability Properties of Isolated Photosystem II Reaction Center

AuthorsSeibert, Michael; Picorel Castaño, Rafael CSIC ORCID ; Rubin, Andrew B.; Connolly, John S.
Issue DateJun-1988
PublisherAmerican Society of Plant Biologists
CitationPlant Physiology 87:303-306 (1988)
AbstractPhotosystem II reaction center (RC) preparations isolated from spinach (Spinacea oleracea) by the Nanba-Satoh procedure (O Nanba, K Satoh 1987 Proc Natl Acad Sci USA 84: 109-112) are quite labile, even at 4°C in the dark. Simple spectroscopic criteria were developed to characterize the native state of the material. Degradation of the RC results in (a) blue-shifting of the red-most absorption maximum, (b) a shift of the 77 K fluorescence maximum from 682 nm to 670 nm, and (c) a shift of fluorescence lifetime components from 1.3-4 nanoseconds and >25 nanoseconds to 6-7 nanoseconds. Fluorescence properties at 77 K seem to be a more sensitive spectral indicator of the integrity of the material. The >25 nanosecond lifetime component is assigned to P680+ Pheophytin– recombination luminescence, which suggests a correlation between the observed spectral shifts and the photochemical competence of the preparation. Substitution of lauryl maltoside for Triton X-100 immediately after RC isolation stabilizes the RCs and suggests that Triton may be responsible for the instability.
Publisher version (URL)
Appears in Collections:(EEAD) Artículos

Files in This Item:
File Description SizeFormat
PicorelR_link_PlantPhys_1988.pdf46,39 kBAdobe PDFThumbnail
Show full item record
Review this work

Page view(s)

checked on Jul 5, 2022


checked on Jul 5, 2022

Google ScholarTM


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.