The xanthophyll cycle pigments, violaxanthin and zeaxanthin, modulate molecular organization of the photosynthetic antenna complex LHCII

Archives of Biochemistry and Biophysics
Ewa JanikWiesław I Gruszecki

Abstract

The effect of violaxanthin and zeaxanthin, two main carotenoids of the xanthophyll cycle, on molecular organization of LHCII, the principal photosynthetic antenna complex of plants, was studied in a model system based on lipid-protein membranes, by means of analysis of 77 K chlorophyll a fluorescence and "native" electrophoresis. Violaxanthin was found to promote trimeric organization of LHCII, contrary to zeaxanthin which was found to destabilize trimeric structures. Moreover, violaxanthin was found to induce decomposition of oligomeric LHCII structures formed in the lipid phase and characterized by the fluorescence emission band at 715 nm. Both pigments promoted formation of two-component supramolecular structures of LHCII and xanthophylls. The violaxanthin-stabilized structures were composed mostly of LHCII trimers while, the zeaxanthin-stabilized supramolecular structures of LHCII showed more complex organization which depended periodically on the xanthophyll content. The effect of the xanthophyll cycle pigments on molecular organization of LHCII was analyzed based on the results of molecular modeling and discussed in terms of a physiological meaning of this mechanism. Supramolecular structures of LHCII stabilized by violax...Continue Reading

References

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Citations

May 10, 2017·Biochimica Et Biophysica Acta. Bioenergetics·Sindhujaa VajravelTunde N Toth
Apr 21, 2017·Photosynthesis Research·Ewa JanikWieslaw I Gruszecki
Apr 30, 2021·The Plant Journal : for Cell and Molecular Biology·Renata WelcWieslaw I Gruszecki
Jun 8, 2021·Frontiers in Bioengineering and Biotechnology·Hu ZhangQiang Hu

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