Interactions between the Photosystem II Subunit PsbS and Xanthophylls Studied in Vivo and in Vitro

• Published in: The Journal of biological chemistry Vol. 283; no. 13; pp. 8434 - 8445
• Main Authors: Bonente, Giulia, Howes, Barry D., Caffarri, Stefano, Smulevich, Giulietta, Bassi, Roberto
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 28.03.2008; American Society for Biochemistry and Molecular Biology
• Subjects: Arabidopsis - enzymology; Arabidopsis - genetics; Circular Dichroism; Dicyclohexylcarbodiimide - metabolism; Genotype; Metabolism and Bioenergetics; Mutation - genetics; Phenotype; Photosynthetic Reaction Center Complex Proteins - chemistry; Photosynthetic Reaction Center Complex Proteins - genetics; Photosynthetic Reaction Center Complex Proteins - metabolism; Photosystem II Protein Complex - chemistry; Photosystem II Protein Complex - genetics; Photosystem II Protein Complex - metabolism; Plant Proteins - chemistry; Plant Proteins - genetics; Plant Proteins - metabolism; Protein Binding; Protein Folding; Protein Subunits - chemistry; Protein Subunits - genetics; Protein Subunits - metabolism; Spectrum Analysis, Raman; Xanthophylls - metabolism

The photosystem II subunit PsbS is essential for excess energy dissipation (qE); however, both lutein and zeaxanthin are needed for its full activation. Based on previous work, two models can be proposed in which PsbS is either 1) the gene product where the quenching activity is located or 2) a prot...