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- Title
Light-induced formation of dimeric LHCII.
- Authors
Janik, Ewa; Bednarska, Joanna; Sowinski, Karol; Luchowski, Rafal; Zubik, Monika; Grudzinski, Wojciech; Gruszecki, Wieslaw
- Abstract
It emerges from numerous experiments that LHCII, the major photosynthetic antenna complex of plants, can appear not only in the trimeric or monomeric states but also as a dimer. We address the problem whether the dimeric form of the complex is just a simple intermediate element of the trimer-monomer transformation or if it can also be a physiologically relevant molecular organization form? Dimers of LHCII were analyzed with application of native electrophoresis, time-resolved fluorescence spectroscopy, and fluorescence correlation spectroscopy. The results reveal the appearance of two types of LHCII dimers: one formed by the dissociation of one monomer from the trimeric structure and the other formed by association of monomers into a distinctively different molecular organizational form, characterized by a high rate of chlorophyll excitation quenching. The hypothetical structure of such an energy quencher is proposed. The high light-induced LHCII dimerization is discussed as a potential element of the photoprotective response in plants.
- Subjects
PHOTOSYNTHESIS; DIMERS; CHLOROPHYLL; SPINACIA; DIMERIZATION
- Publication
Photosynthesis Research, 2017, Vol 132, Issue 3, p265
- ISSN
0166-8595
- Publication type
Article
- DOI
10.1007/s11120-017-0387-6