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ID 52503
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Author
Yamamoto, Yasusi
Abstract
The reaction center-binding D1 protein of Photosystem II is damaged by excessive light, which leads to photoinhibition of Photosystem II. The damaged D1 protein is removed immediately by specific proteases, and a metalloprotease FtsH located in the thylakoid membranes is involved in the proteolytic process. According to recent studies on the distribution and organization of the protein complexes/supercomplexes in the thylakoid membranes, the grana of higher plant chloroplasts are crowded with Photosystem II complexes and light-harvesting complexes. For the repair of the photodamaged D1 protein, the majority of the active hexameric FtsH proteases should be localized in close proximity to the Photosystem II complexes. The unstacking of the grana may increase the area of the grana margin and facilitate easier access of the FtsH proteases to the damaged D1 protein. These results suggest that the structural changes of the thylakoid membranes by light stress increase the mobility of the membrane proteins and support the quality control of Photosystem II.
Keywords
Photosystem II
Light stress
FtsH protease
Grana
Thylakoid
Published Date
2014
Publication Title
Journal of Photochemistry and Photobiology B: Biology
Volume
volume137
Publisher
Elsevier
Start Page
100
End Page
106
ISSN
1011-1344
NCID
AA10686173
Content Type
Journal Article
language
英語
Copyright Holders
© 2014 Elsevier B.V. All rights reserved.
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author
Refereed
True
DOI