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The major trimeric antenna complexes serve as a site for qH-energy dissipation in plants

Bru, Pierrick (författare)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
Steen, Collin J. (författare)
Department of Chemistry, University of California, CA, Berkeley, United States; Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States; Kavli Energy Nanoscience Institute, CA, Berkeley, United States
Park, Soomin (författare)
Department of Chemistry, University of California, CA, Berkeley, United States; Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States; Kavli Energy Nanoscience Institute, CA, Berkeley, United States; School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Chungnam, Cheonan, South Korea
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Amstutz, Cynthia L. (författare)
Department of Plant and Microbial Biology, Howard Hughes Medical Institute, University of California, CA, Berkeley, United States
Sylak-Glassman, Emily J. (författare)
Department of Chemistry, University of California, CA, Berkeley, United States; Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States
Lam, Lam (författare)
Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States; Kavli Energy Nanoscience Institute, CA, Berkeley, United States; Graduate Group in Biophysics, University of California, CA, Berkeley, United States
Fekete, Agnes (författare)
Julius-von-Sachs-Institute, Biocenter, Pharmaceutical Biology, University of Wuerzburg, Wuerzburg, Germany
Mueller, Martin J. (författare)
Julius-von-Sachs-Institute, Biocenter, Pharmaceutical Biology, University of Wuerzburg, Wuerzburg, Germany
Longoni, Fiamma (författare)
Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
Fleming, Graham R. (författare)
Department of Chemistry, University of California, CA, Berkeley, United States; Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States; Kavli Energy Nanoscience Institute, CA, Berkeley, United States; Graduate Group in Biophysics, University of California, CA, Berkeley, United States
Niyogi, Krishna K. (författare)
Molecular Biophysics and Integrated Bioimaging Division (Formerly Physical Biosciences Division), Lawrence Berkeley National Laboratory, CA, Berkeley, United States; Department of Plant and Microbial Biology, Howard Hughes Medical Institute, University of California, CA, Berkeley, United States
Malnoë, Alizée (författare)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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 (creator_code:org_t)
American Society for Biochemistry and Molecular Biology Inc. 2022
2022
Engelska.
Ingår i: Journal of Biological Chemistry. - : American Society for Biochemistry and Molecular Biology Inc.. - 0021-9258 .- 1083-351X. ; 298:11
Relaterad länk:
https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Plants and algae are faced with a conundrum: harvesting sufficient light to drive their metabolic needs while dissipating light in excess to prevent photodamage, a process known as nonphotochemical quenching. A slowly relaxing form of energy dissipation, termed qH, is critical for plants’ survival under abiotic stress; however, qH location in the photosynthetic membrane is unresolved. Here, we tested whether we could isolate subcomplexes from plants in which qH was induced that would remain in an energy-dissipative state. Interestingly, we found that chlorophyll (Chl) fluorescence lifetimes were decreased by qH in isolated major trimeric antenna complexes, indicating that they serve as a site for qH-energy dissipation and providing a natively quenched complex with physiological relevance to natural conditions. Next, we monitored the changes in thylakoid pigment, protein, and lipid contents of antenna with active or inactive qH but did not detect any evident differences. Finally, we investigated whether specific subunits of the major antenna complexes were required for qH but found that qH was insensitive to trimer composition. Because we previously observed that qH can occur in the absence of specific xanthophylls, and no evident changes in pigments, proteins, or lipids were detected, we tentatively propose that the energy-dissipative state reported here may stem from Chl–Chl excitonic interaction.

Ämnesord

NATURVETENSKAP  -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
NATURVETENSKAP  -- Biologi -- Botanik (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Botany (hsv//eng)

Nyckelord

abiotic stress
Arabidopsis thaliana
CRISPR–Cas9
energy dissipation
light-harvesting complexes
nonphotochemical quenching qH
photosynthesis
time-resolved fluorescence

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