Role of an ancient light-harvesting protein of PSI in light absorption and photoprotection

Overview
TitleRole of an ancient light-harvesting protein of PSI in light absorption and photoprotection
AuthorsLu Y, Gan Q, Iwai M, Alboresi A, Burlacot A, Dautermann O, Takahashi H, Crisanto T, Peltier G, Morosinotto T, Melis A, Niyogi KK
TypeJournal Article
Journal NameNature communications
Volume12
Issue1
Year2021
Page(s)679
CitationLu Y, Gan Q, Iwai M, Alboresi A, Burlacot A, Dautermann O, Takahashi H, Crisanto T, Peltier G, Morosinotto T, Melis A, Niyogi KK. Role of an ancient light-harvesting protein of PSI in light absorption and photoprotection. Nature communications. 2021 01 29; 12(1):679.

Abstract

Diverse algae of the red lineage possess chlorophyll a-binding proteins termed LHCR, comprising the PSI light-harvesting system, which represent an ancient antenna form that evolved in red algae and was acquired through secondary endosymbiosis. However, the function and regulation of LHCR complexes remain obscure. Here we describe isolation of a Nannochloropsis oceanica LHCR mutant, named hlr1, which exhibits a greater tolerance to high-light (HL) stress compared to the wild type. We show that increased tolerance to HL of the mutant can be attributed to alterations in PSI, making it less prone to ROS production, thereby limiting oxidative damage and favoring growth in HL. HLR1 deficiency attenuates PSI light-harvesting capacity and growth of the mutant under light-limiting conditions. We conclude that HLR1, a member of a conserved and broadly distributed clade of LHCR proteins, plays a pivotal role in a dynamic balancing act between photoprotection and efficient light harvesting for photosynthesis.

Properties
Additional details for this publication include:
Property NameValue
Journal CountryEngland
Publication ModelElectronic
Publication TypeJournal Article
Language Abbreng
LanguageEnglish
Elocation10.1038/s41467-021-20967-1
DOI10.1038/s41467-021-20967-1
Journal AbbreviationNat Commun
Publication Date2021 01 29
eISSN2041-1723
ISSN2041-1723
Publication TypeResearch Support, Non-U.S. Gov't
Publication TypeResearch Support, U.S. Gov't, Non-P.H.S.
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PMID: PubMedPMID:33514722