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.
References
32
Referenced
76
10.1016/0014-5793(87)80576-8
10.1016/0014-5793(87)80090-X
10.1515/znc-1988-11-1213
10.1016/0005-2728(90)90031-X
{'key': 'e_1_2_1_6_1', 'author': 'Vass I.', 'year': '1991', 'journal-title': 'Proc. Natl. Acad. Sci. USA'}
/ Proc. Natl. Acad. Sci. USA by Vass I. (1991)10.1104/pp.82.1.261
10.1016/0005-2728(86)90101-5
10.1021/bi00478a010
10.1007/BF00029734
10.1007/BF00032311
10.1016/0014-5793(91)80210-T
10.1016/0014-5793(90)81115-5
10.1016/0014-5793(91)80031-W
{'key': 'e_1_2_1_15_1', 'author': 'Shipton C.', 'year': '1991', 'journal-title': 'Proc. Natl. Acad. Sci. USA'}
/ Proc. Natl. Acad. Sci. USA by Shipton C. (1991)10.1016/S0021-9258(19)39927-2
10.1016/S0021-9258(19)38381-4
10.1016/0014-5793(91)81247-6
10.1111/j.1399-3054.1990.tb00029.x
10.1016/0005-2728(90)90204-H
10.1016/S0005-2728(05)80249-X
10.1016/S0005-2728(89)80226-9
10.1073/pnas.84.6.1497
10.1073/pnas.86.17.6617
10.1016/0005-2728(88)90036-9
10.1111/j.1432-1033.1988.tb14388.x
10.1016/B978-0-12-152516-3.50005-X
10.1016/0014-5793(84)80089-7
10.1016/0014-5793(84)80090-3
10.1016/S0021-9258(18)55400-4
10.1016/S0021-9258(19)57275-1
10.1016/S0021-9258(18)55345-X
10.1073/pnas.84.6.1497
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) |
@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} }