The xanthophyll cycle affects reversible interactions between PsbS and light-harvesting complex II to control non-photochemical quenching
作者: Joanna SacharzVasco GiovagnettiPetra UngererGiulia MastroianniAlexander V. Ruban
作者单位: 1grid.4868.2, 0000 0001 2171 1133, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
刊名: Nature Plants, 2017, Vol.3 (2), pp.236-240
来源数据库: Springer Nature Journal
DOI: 10.1038/nplants.2016.225
英文摘要: Abstract(#br)To maintain high photosynthetic rates, plants must adapt to their light environment on a timescale of seconds to minutes. Therefore, the light-harvesting antenna system of photosystem II in thylakoid membranes, light-harvesting complex II (LHCII), has a feedback mechanism, which determines the proportion of absorbed energy dissipated as heat: non-photochemical chlorophyll fluorescence quenching (NPQ). This is crucial to prevent photo-oxidative damage to photosystem II (PSII) and is controlled by the transmembrane pH differences (ΔpH). High ΔpH activates NPQ by protonation of the protein PsbS and the enzymatic de-epoxidation of LHCII-bound violaxanthin to zeaxanthin. But the precise role of PsbS and its interactions with different LHCII complexes remain uncertain. We have...
全文获取路径: Springer Nature  (合作)