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    1. Cell Biology
    2. Human Biology and Medicine

    Mitochondrial CoQ deficiency is a common driver of mitochondrial oxidants and insulin resistance

    Daniel J Fazakerley et al.
    Lower mitochondrial coenzyme Q was a consistent feature across multiple in vitro and in vivo models of insulin resistance and was sufficient to cause insulin resistance through increased mitochondrial oxidants.
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    R-spondins can potentiate WNT signaling without LGRs

    Andres M Lebensohn, Rajat Rohatgi
    R-spondins 2 and 3 can potentiate WNT signaling in the absence of LGRs through interactions with ZNRF3/RNF43 E3 ubiquitin ligases and heparan sulfate proteoglycans, defining two alternative modes of R-spondin-mediated signaling.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Cdc48 regulates a deubiquitylase cascade critical for mitochondrial fusion

    Tânia Simões et al.
    A signaling pathway—comprising a linear sequence of the ubiquitin-selective chaperone Cdc48/p97 and the deubiquitylases Ubp12 and Ubp2—synergistically regulates mitochondrial fusion, thereby fine-tuning ubiquitylation of the mitofusin Fzo1.
    1. Cell Biology
    2. Neuroscience

    The synaptic ribbon is critical for sound encoding at high rates and with temporal precision

    Philippe Jean et al.
    The synaptic ribbon regulates calcium channel clustering and proper vesicle dynamics at cochlear inner hair cells to ensure precise sound encoding.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Diverse functions of homologous actin isoforms are defined by their nucleotide, rather than their amino acid sequence

    Pavan Vedula et al.
    CRISPR/Cas9 gene editing in mice reveals that diverse functions of actin isoforms are defined by their nucleotide, rather than their amino acid sequence, suggesting a novel mechanism of nucleotide-dependent protein regulation in eukaryotic genomes.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Isoforms: Fundamental differences

    Peter W Gunning, Edna C Hardeman
    The differences between β- and γ-actin are deeper than those between the amino acid sequences of these two proteins.
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    1. Cell Biology

    Ratiometric sensing of BiP-client versus BiP levels by the unfolded protein response determines its signaling amplitude

    Anush Bakunts et al.
    Restoration of endoplasmic reticulum (ER) homeostatis occurs when levels of the key ER resident chaperone BiP exceed those of accumulating ER clients.
    1. Cell Biology

    Damage-induced reactive oxygen species regulate vimentin and dynamic collagen-based projections to mediate wound repair

    Danny LeBert et al.
    Live real time imaging and perturbation experiments reveal how vimentin integrates with early damage induced reactive oxygen species to mediate collagen rearrangements and epithelial cell projections during wound repair and regeneration.
    1. Cell Biology

    A disassembly-driven mechanism explains F-actin-mediated chromosome transport in starfish oocytes

    Philippe Bun et al.
    On entry to meiosis, chromosomes scattered in the large oocyte nucleus of starfish are collected by an F-actin network, which contracts by an unexpected, myosin-independent mechanism based on local assembly and global disassembly of actin filaments.