The evolution of the photoprotective antenna proteins in oxygenic photosynthetic eukaryotes

Biochemical Society Transactions
Vasco Giovagnetti, Alexander V Ruban

Abstract

Photosynthetic organisms require rapid and reversible down-regulation of light harvesting to avoid photodamage. Response to unpredictable light fluctuations is achieved by inducing energy-dependent quenching, qE, which is the major component of the process known as non-photochemical quenching (NPQ) of chlorophyll fluorescence. qE is controlled by the operation of the xanthophyll cycle and accumulation of specific types of proteins, upon thylakoid lumen acidification. The protein cofactors so far identified to modulate qE in photosynthetic eukaryotes are the photosystem II subunit S (PsbS) and light-harvesting complex stress-related (LHCSR/LHCX) proteins. A transition from LHCSR- to PsbS-dependent qE took place during the evolution of the Viridiplantae (also known as 'green lineage' organisms), such as green algae, mosses and vascular plants. Multiple studies showed that LHCSR and PsbS proteins have distinct functions in the mechanism of qE. LHCX(-like) proteins are closely related to LHCSR proteins and found in 'red lineage' organisms that contain secondary red plastids, such as diatoms. Although LHCX proteins appear to control qE in diatoms, their role in the mechanism remains poorly understood. Here, we present the current kn...Continue Reading

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Citations

Dec 12, 2019·Frontiers in Plant Science·Eric Maréchal
Oct 28, 2019·Nature Communications·JunMo LeeHwan Su Yoon
Aug 21, 2020·IScience·Francesco SacconTomáš Polívka
Jan 9, 2021·Plant & Cell Physiology·Michiki AsoAtsushi Takabayashi
Mar 19, 2019·Biochimica Et Biophysica Acta. Bioenergetics·Sam Wilson, Alexander V Ruban
Jul 3, 2021·Biophysical Journal·Premashis MannaGabriela S Schlau-Cohen
Sep 30, 2021·The Journal of Physical Chemistry Letters·Anthi ChrysafoudiVangelis Daskalakis
Jul 28, 2020·Biochimica Et Biophysica Acta. Bioenergetics·Václav ŠebelíkTomáš Polívka

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