1,229 results found
    1. Cell Biology

    Tryparedoxin peroxidase-deficiency commits trypanosomes to ferroptosis-type cell death

    Marta Bogacz, R Luise Krauth-Siegel
    Ferroptosis is an evolutionary ancient process that is counterbalanced by distant peroxidases, GPx4 in mammals and tryparedoxin peroxidases in trypanosomes, and can be induced at distinct subcellular membranes depending on the individual cell type.
    1. Developmental Biology
    2. Neuroscience

    Caenorhabditis elegans processes sensory information to choose between freeloading and self-defense strategies

    Jodie A Schiffer et al.
    C. elegans nematodes use a sensory-neuronal circuit to determine whether to defend themselves from hydrogen peroxide attack or to freeload off orthologous protective defenses from bacteria in their surrounding environment.
    1. Cell Biology
    2. Immunology and Inflammation

    Anti-ferroptotic mechanism of IL4i1-mediated amino acid metabolism

    Leonie Zeitler et al.
    IL4i1 is an amino acid oxidase expressed in the mammalian immune system and snake venoms, which control diametrically opposite cell protection versus cell death pathways, respectively.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Live-cell mapping of organelle-associated RNAs via proximity biotinylation combined with protein-RNA crosslinking

    Pornchai Kaewsapsak et al.
    Live-cell nanometer-resolution RNA labeling method enables transcriptome-wide mapping of endogenous RNAs in nuclear, cytosol, ER, and mitochondrial subcompartments.
    1. Cell Biology
    2. Neuroscience

    Reconstruction of genetically identified neurons imaged by serial-section electron microscopy

    Maximilian Joesch et al.
    A new pipeline of electron microscopy techniques reduces the time required to visualize genetically targeted neurons and their connections by two orders of magnitude.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Redox signaling via the molecular chaperone BiP protects cells against endoplasmic reticulum-derived oxidative stress

    Jie Wang et al.
    Direct modification by endogenous peroxide of a conserved cysteine in the molecular chaperone BiP decouples its ATPase and peptide-binding activities, allowing for enhanced polypeptide holdase activity during oxidative stress.
    1. Cell Biology

    The peroxisome counteracts oxidative stresses by suppressing catalase import via Pex14 phosphorylation

    Kanji Okumoto et al.
    H2O2-induced phosphorylation at Ser232 of Pex14 spatiotemporally regulates peroxisomal import of catalase, functioning in counteracting action against oxidative stress by the increase of cytosolic catalase.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural characterization of encapsulated ferritin provides insight into iron storage in bacterial nanocompartments

    Didi He et al.
    Encapsulin-associated ferritin proteins form metal-dependent decamers that are active as ferroxidase enzymes, but require encapsulation to form an iron store.
    1. Microbiology and Infectious Disease
    2. Plant Biology

    Proximity proteomics in a marine diatom reveals a putative cell surface-to-chloroplast iron trafficking pathway

    Jernej Turnšek et al.
    An iron-sensitive gene cluster encodes proteins that co-localize with phytotransferrin endosomes and are involved in key intracellular iron transformation and trafficking processes in a model marine diatom.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Changes of mitochondrial ultrastructure and function during ageing in mice and Drosophila

    Tobias Brandt et al.
    Respiratory activity and inner membrane organisation of mitochondria from Drosophila melanogaster break down during ageing, but mouse heart mitochondria appear to be protected against age-related damage.

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