277 results found
    1. Human Biology and Medicine
    2. Immunology and Inflammation

    Chronic muscle weakness and mitochondrial dysfunction in the absence of sustained atrophy in a preclinical sepsis model

    Allison M Owen et al.
    Sepsis-induced long-term muscle weakness was reproduced using a refined murine model, which was accompanied by mitochondrial dysfunction in the absence of sustained atrophy, suggesting the promise of mitochondria-targeted post-sepsis therapies.
    1. Cell Biology

    Crumbs organizes the transport machinery by regulating apical levels of PI(4,5)P2 in Drosophila

    Johanna Lattner et al.
    The polarity protein crumbs controls apical secretion and the architecture of the apical domain by modulating PI(4,5)P2 levels and the organization of apical Rab6-, Rab11-, and Rab30-dependent trafficking.
    1. Cell Biology

    Negative regulation of autophagy by UBA6-BIRC6–mediated ubiquitination of LC3

    Rui Jia, Juan S Bonifacino
    An ensemble of the ubiquitin-activating enzyme UBA6 and ubiquitin-conjugating enzyme/ubiquitin-ligase BIRC6 mediates ubiquitination of LC3, targeting the latter for proteasomal degradation and thus attenuating autophagic degradation of cellular substrates.
    1. Structural Biology and Molecular Biophysics
    2. Biochemistry and Chemical Biology

    Protein polyglutamylation catalyzed by the bacterial calmodulin-dependent pseudokinase SidJ

    Alan Sulpizio et al.
    The pseudokinase-like Legionella effector SidJ catalyzes the glutamylation of bacterial ubiquitin ligases in a calmodulin-dependent manner.
    1. Cell Biology
    2. Evolutionary Biology

    A unicellular relative of animals generates a layer of polarized cells by actomyosin-dependent cellularization

    Omaya Dudin et al.
    Cellularization in Sphaeroforma arctica generates a self-organized structure that morphologically resembles an epithelium, and is associated with tightly regulated expression of cell adhesion pathways.
    1. Structural Biology and Molecular Biophysics

    Auto-regulation of Rab5 GEF activity in Rabex5 by allosteric structural changes, catalytic core dynamics and ubiquitin binding

    Janelle Lauer et al.
    Understanding the complex auto-regulatory mechanisms for guanine nucleotide exchange factors is critically important for fully appreciating the layers of control for small GTPases.
    1. Cell Biology

    DNA damage checkpoint activation impairs chromatin homeostasis and promotes mitotic catastrophe during aging

    Matthew M Crane et al.
    Activation of a DNA-damage cell cycle checkpoint during aging causes genome instability and senescence in yeast mother cells.
    1. Developmental Biology
    2. Evolutionary Biology

    Extraocular, rod-like photoreceptors in a flatworm express xenopsin photopigment

    Kate A Rawlinson et al.
    A new opsin receptor is light-sensitive and expressed in a unique type of photoreceptor in a flatworm that encloses over 400 sensory cilia within its cell membrane.
    1. Microbiology and Infectious Disease

    Differential requirements for cyclase-associated protein (CAP) in actin-dependent processes of Toxoplasma gondii

    Alex Hunt et al.
    Partially overlapping functions of a limited subset of actin binding proteins allow the parasite Toxoplasma gondii to achieve actin regulation required for complex cellular processes.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Hemozoin produced by mammals confers heme tolerance

    Rini H Pek et al.
    Heme accumulation is toxic, but deficiency of the heme transporter HRG1/SLC48A1 causes heme sequestration and crystallization into hemozoin within enlarged lysosomes of macrophages, thereby conferring heme tolerance to mammals.

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