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The PsbS protein controls the macro-organisation of photosystem II complexes in the grana membranes of higher plant chloroplasts
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posted on 2023-06-08, 16:13 authored by Sami Kereïche, Anett Kiss, Roman Kouril, Egbert J Boekema, Peter HortonThe PsbS protein is a critical component in the regulation of non-photochemical quenching (NPQ) in higher plant photosynthesis. Electron microscopy and image analysis of grana membrane fragments from wild type and mutant Arabidopsis plants showed that the semi-crystalline domains of photosystem II supercomplexes were identical in the presence and absence of PsbS. However, the frequency of the domains containing crystalline arrays was increased in the absence of PsbS. Conversely, there was a complete absence of such arrays in the membranes of plants containing elevated amounts of this protein. It is proposed that PsbS controls the macro-organisation of the grana membrane, providing an explanation of its role in NPQ.
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Publication status
- Published
Journal
FEBS LettersISSN
0014-5793Publisher
ElsevierExternal DOI
Issue
4Volume
584Page range
759-764Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2013-11-01Usage metrics
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