Crossref journal-article
Wiley
FEBS Letters (311)
Abstract

We have recently shown that during in vivo photoinhibition the D1 protein is degraded via a modified form, designated D1*. Depending on light conditions, the amount of D1* varies in leaves between 0 and 50% of total D1 content. By isolating thylakoids from leaves acclimated to different light levels, and performing photoinhibition experiments on these thylakoids, the following results on D1 protein degradation were obtained: (1) the protease involved in D1 degradation requires activation by light; (ii) neither acceptor nor donor side photoinhibition of PSII induces formation of D1* in vitro; (iii) in isolated thylakoids, the transformation of D1 to D1* can be induced in low light in the presence of ATP, which suggests that D1* is a phosphorylated form of the D1 protein; (iv) D1*, induced either in vivo or in vitro, is much less susceptible to degradation during illumination of isolated thylakoids than the original D1 protein. We suggest that the modification to D1* is a means to prevent disassembly of photodamaged photosystem II complex in appressed membranes.

Bibliography

Aro, E.-M., Kettunen, R., & Tyystjärvi, E. (1992). ATP and light regulate D1 protein modification and degradation Role of D1* in photoinhibition. FEBS Letters, 297(1–2), 29–33. Portico.

Dates
Type When
Created 23 years, 1 month ago (July 25, 2002, 3:42 a.m.)
Deposited 1 year, 11 months ago (Sept. 16, 2023, 10:34 p.m.)
Indexed 2 weeks, 4 days ago (Aug. 6, 2025, 9:33 a.m.)
Issued 33 years, 6 months ago (Feb. 3, 1992)
Published 33 years, 6 months ago (Feb. 3, 1992)
Published Online 23 years, 7 months ago (Jan. 16, 2002)
Published Print 33 years, 6 months ago (Feb. 3, 1992)
Funders 0

None

@article{Aro_1992, title={ATP and light regulate D1 protein modification and degradation Role of D1* in photoinhibition}, volume={297}, ISSN={1873-3468}, url={http://dx.doi.org/10.1016/0014-5793(92)80320-g}, DOI={10.1016/0014-5793(92)80320-g}, number={1–2}, journal={FEBS Letters}, publisher={Wiley}, author={Aro, Eva-Mari and Kettunen, Reetta and Tyystjärvi, Esa}, year={1992}, month=feb, pages={29–33} }