Abstract
Violaxanthin (Vx) and diadinoxanthin (Ddx) de-epoxidation are light dependent steps in one of the most important photoprotecting processes called respectively violaxanthin and diadinoxanthin cycle. Violaxanthin cycle operates in vascular plants and many groups of algae while diadinoxanthin cycle is present in diatoms. In this study the influence of lipids on de-epoxidation of Vx and Ddx was investigated. In particular, the dependence between conversion of Vx into antheraxanthin and zeaxanthin as well as Ddx to diatoxanthin and the molecular dynamics of hydrophobic fraction of aggregates formed by inverted micelles, which are necessary for de-epoxidation, was studied. Thickness of the hydrophobic fraction of the aggregates, size of the inverted micelles, suggested by mathematical description of these structures and solubility of Vx and Ddx in various kind of lipids were the other tested parameters. Obtained results show that the rate of de-epoxidation is strongly dependent on physical/chemical properties of lipids. The key role for violaxanthin or diadinoxanthin de-epoxidase activation play non-bilayer lipids and the parameters of inverted micelles created by them, such as thickness, diameter and molecular dynamics of their hydrophobic core.
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© 2013 Zhejiang University Press, Hangzhou and Springer-Verlag Berlin Heidelberg
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Latowski, D., Schaller, S., Grzyb, J., Goss, R., Strzałka, K. (2013). Effect of Lipids on Violaxanthin and Diadinoxanthin De-Epoxidation. In: Photosynthesis Research for Food, Fuel and the Future. Advanced Topics in Science and Technology in China. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32034-7_100
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DOI: https://doi.org/10.1007/978-3-642-32034-7_100
Publisher Name: Springer, Berlin, Heidelberg
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