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- W4384927085 endingPage "112758" @default.
- W4384927085 startingPage "112758" @default.
- W4384927085 abstract "In plants, the major light-harvesting antenna complex (LHCII) is vital for both light harvesting and photoprotection in photosystem II. Previously, we proposed that the thylakoid membrane itself could switch LHCII into the photoprotective state, qE, via a process known as hydrophobic mismatch. The decrease in the membrane thickness that followed the formation of ΔpH was a key fact that prompted this idea. To test this, we made proteoliposomes from lipids with altered acyl chain length (ACL). Here, we show that ACL regulates the average chlorophyll fluorescence lifetime of LHCII. For liposomes made of lipids with an ACL of 18 carbons, the lifetime was ~2 ns, like that for the thylakoid membrane. Furthermore, LHCII appears to be quenched in proteoliposomes with an ACL both shorter and longer than 18 carbons. The proteoliposomes made of short ACL lipids display structural heterogeneity revealing two quenched conformations of LHCII, each having characteristic 77 K fluorescence spectra. One conformation spectrally resembles isolated LHCII aggregates, whilst the other resembles LHCII immobilized in polyacrylamide gels. Overall, the decrease in the ACL appears to produce quenched conformations of LHCII, which renders plausible the idea that the trigger of qE is the hydrophobic mismatch." @default.
- W4384927085 created "2023-07-22" @default.
- W4384927085 creator A5028057326 @default.
- W4384927085 creator A5028678622 @default.
- W4384927085 creator A5059757019 @default.
- W4384927085 creator A5064273965 @default.
- W4384927085 date "2023-09-01" @default.
- W4384927085 modified "2023-09-27" @default.
- W4384927085 title "Altered lipid acyl chain length controls energy dissipation in light-harvesting complex II proteoliposomes by hydrophobic mismatch" @default.
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- W4384927085 doi "https://doi.org/10.1016/j.jphotobiol.2023.112758" @default.
- W4384927085 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37531665" @default.
- W4384927085 hasPublicationYear "2023" @default.
- W4384927085 type Work @default.