22 results found
    1. Cell Biology
    2. Genetics and Genomics

    The Mars1 kinase confers photoprotection through signaling in the chloroplast unfolded protein response

    Karina Perlaza et al.
    A genetic screen in a unicellular photosynthetic organism uncovers the first essential signaling component in the chloroplast unfolded protein response that relays information from the chloroplast to the nuclear compartment.
    1. Biochemistry and Chemical Biology
    2. Plant Biology

    Flavodiiron proteins 1–to-4 function in versatile combinations in O2 photoreduction in cyanobacteria

    Anita Santana-Sanchez et al.
    In vivo evidence is provided indicating that Flv2/Flv4, together with Flv1/Flv3, mediate O2 photoreduction downstream of PSI in a highly coordinated manner.
    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 et al.
    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.
    1. Cell Biology
    2. Plant Biology

    Photosynthetic sea slugs induce protective changes to the light reactions of the chloroplasts they steal from algae

    Vesa Havurinne, Esa Tyystjärvi
    Slug chloroplasts avoid damage to photosynthesis by maintaining an oxidized electron transfer chain with the help of oxygen-sensitive electron acceptors.
    1. Plant Biology

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

    Rosa Pipitone et al.
    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. Plant Biology

    Altered N-glycan composition impacts flagella-mediated adhesion in Chlamydomonas reinhardtii

    Nannan Xu et al.
    Adhesion force measurements reveal that proper N-glycosylation of flagellar membrane proteins is crucial for adhering C. reinhardtii cells onto surfaces.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Functional trade-offs and environmental variation shaped ancient trajectories in the evolution of dim-light vision

    Gianni M Castiglione, Belinda SW Chang
    The evolution of the light-sensitive visual pigment rhodopsin involved functional tradeoffs that may have sacrificed rod photosensitivity for active-state protein stability to mitigate phototoxicity in tetrapods, but not in fishes.
    1. Plant Biology

    Photosynthesis without β-carotene

    Pengqi Xu et al.
    Tobacco plants containing xanthophyll astaxanthin show that both photosystems are fully functional in the absence of carotenes, and these pigments are not essential for photosynthesis.
    1. Evolutionary Biology
    2. Plant Biology

    Evolution of alternative biosynthetic pathways for vitamin C following plastid acquisition in photosynthetic eukaryotes

    Glen Wheeler et al.
    Genomic evidence suggests that L-gulonolactone oxidase-the terminal enzyme in vitamin C synthesis, which has been repeatedly lost throughout animal evolution-was lost in plants and other photosynthetic eukaryotes following plastid acquisition.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Light-induced depigmentation in planarians models the pathophysiology of acute porphyrias

    Bradford M Stubenhaus et al.
    Physiological porphyrin biosynthesis causes photosensitivity in fasted planarians, providing an experimentally tractable animal model of acute porphyrias.

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