54 results found
    1. Plant Biology
    2. Structural Biology and Molecular Biophysics

    Charting the native architecture of Chlamydomonas thylakoid membranes with single-molecule precision

    Wojciech Wietrzynski, Miroslava Schaffer ... Benjamin D Engel
    In situ cryo-electron tomography resolves individual photosynthetic complexes within native thylakoid membranes, revealing how thylakoid architecture sorts proteins into discrete membrane domains.
    1. Plant Biology

    A multifaceted analysis reveals two distinct phases of chloroplast biogenesis during de-etiolation in Arabidopsis

    Rosa Pipitone, Simona Eicke ... Emilie Demarsy
    Serial-Block-Face Scanning Electron Microscopy (SBF-SEM) associated with biomolecular analysis show that chloroplast differentiation proceeds by distinct ‘structure establishment’ and ‘chloroplast proliferation’ phases, each with differential protein and lipid regulation.
    1. Structural Biology and Molecular Biophysics
    2. Plant Biology

    Native architecture of the Chlamydomonas chloroplast revealed by in situ cryo-electron tomography

    Benjamin D Engel, Miroslava Schaffer ... Wolfgang Baumeister
    The first 3D views of the native algal chloroplast provide new insights into thylakoid biogenesis, photosynthesis, and carbon fixation.
    1. Plant Biology
    2. Structural Biology and Molecular Biophysics

    In situ cryo-ET structure of phycobilisome–photosystem II supercomplex from red alga

    Meijing Li, Jianfei Ma ... Sen-Fang Sui
    The nature of the phycobilisome–photosystem II supercomplex on the native thylakoid determined with cryo-electron tomography at an unprecedented resolution reveals that one phycobilisome interconnects with six photosystem monomers.
    1. Biochemistry and Chemical Biology
    2. Plant Biology

    Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

    Geoffry A Davis, Atsuko Kanazawa ... David M Kramer
    Storage of solar energy in the thylakoid electrical field by photosynthesis in vivo can substantially destabilize charge-separated states in photosystem II, leading to singlet oxygen production and photodamage, contributing to loss of productivity, especially under fluctuating light experienced in the field.
    1. Plant Biology
    2. Structural Biology and Molecular Biophysics

    Structure of Dunaliella photosystem II reveals conformational flexibility of stacked and unstacked supercomplexes

    Ido Caspy, Maria Fadeeva ... Nathan Nelson
    Photosystem II, the pigment-protein complex responsible for water oxidation in photosynthesis, was found to exist in two different core conformations with altered antennae connectivity.
    1. Plant Biology

    Regulation of photosynthetic electron flow on dark to light transition by ferredoxin:NADP(H) oxidoreductase interactions

    Manuela Kramer, Melvin Rodriguez-Heredia ... Guy Thomas Hanke
    The regulatory switch from protection to assimilation, which plants use to exploit natural, fluctuating light, involves movement of the enzyme ferredoxin:NADP(H) oxidoreductase between chloroplast membrane complexes.
    1. Cell Biology
    2. Plant Biology

    The autophagy receptor NBR1 directs the clearance of photodamaged chloroplasts

    Han Nim Lee, Jenu Varghese Chacko ... Marisa S Otegui
    Photodamaged chloroplasts are targeted for vacuolar degradation through microautophagy by the NBR1 autophagy receptor without the participation of the canonical autophagy machinery.
    1. Plant Biology
    2. Structural Biology and Molecular Biophysics

    Identification of distinct pH- and zeaxanthin-dependent quenching in LHCSR3 from Chlamydomonas reinhardtii

    Julianne M Troiano, Federico Perozeni ... Gabriela S Schlau-Cohen
    Light-harvesting complex stress-related is a protein from photosynthetic green algae that prevents damage from sunlight via two distinct conformational processes, which protect against different timescales of solar fluctuations.

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