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Violaxanthin inhibits nonphotochemical quenching in light-harvesting antenna of Chromera velia
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SYSNO ASEP 0463684 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Violaxanthin inhibits nonphotochemical quenching in light-harvesting antenna of Chromera velia Author(s) Kaňa, Radek (MBU-M) RID, ORCID
Kotabová, Eva (MBU-M) RID, ORCID
Kopečná, Jana (MBU-M) RID
Trsková, Eliška (MBU-M)
Belgio, Erica (MBU-M)
Sobotka, Roman (MBU-M) RID, ORCID
Ruban, A.V. (GB)Source Title FEBS Letters. - : Wiley - ISSN 0014-5793
Roč. 590, č. 8 (2016), s. 1076-1085Number of pages 10 s. Language eng - English Country US - United States Keywords Chromera velia ; light-harvesting antennae ; nonphotochemical quenching Subject RIV CE - Biochemistry R&D Projects GBP501/12/G055 GA ČR - Czech Science Foundation (CSF) LO1416 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.3.30.0059 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support MBU-M - RVO:61388971 UT WOS 000375008700005 EID SCOPUS 84963645419 DOI 10.1002/1873-3468.12130 Annotation Non-photochemical quenching (NPQ) is a photoprotective mechanism in light-harvesting antennae. NPQ is triggered by chloroplast thylakoid lumen acidification and is accompanied by violaxanthin de-epoxidation to zeaxanthin, which further stimulates NPQ. In the present study, we show that violaxanthin can act in the opposite direction to zeaxanthin because an increase in the concentration of violaxanthin reduced NPQ in the light-harvesting antennae of Chromera velia. The correlation overlapped with a similar relationship between violaxanthin and NPQ as observed in isolated higher plant light-harvesting complex II. The data suggest that violaxanthin in C. velia can act as an inhibitor of NPQ, indicating that violaxanthin has to be removed from the vicinity of the protein to reach maximal NPQ. Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2017
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