748 results found
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Release of cholesterol-rich particles from the macrophage plasma membrane during movement of filopodia and lamellipodia

    Xuchen Hu et al.
    Macrophages release 30-nm vesicular particles enriched in accessible cholesterol during cellular locomotion, a discovery that is likely relevant to cholesterol disposal by these cells.
    1. Cell Biology
    2. Plant Biology

    Two mechanisms regulate directional cell growth in Arabidopsis lateral roots

    Charlotte Kirchhelle et al.
    In lateral roots, cells employ a novel pathway to cell edges to control directional growth, which acts independently of the leading paradigm of oriented deposition of cellulose microfibrils at faces.
    1. Immunology and Inflammation

    Composition and structure of synaptic ectosomes exporting antigen receptor linked to functional CD40 ligand from helper T cells

    David G Saliba et al.
    TCR and CD40L microclusters are linked in synaptic ectosomes (extracellular vesicles) and released in the immunological synapse by helper T cells and induce dendritic cell maturation and cytokine production.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    The Photorhabdus asymbiotica virulence cassettes deliver protein effectors directly into target eukaryotic cells

    Isabella Vlisidou et al.
    The insect pathogenic bacterium Photorhabdus has evolved astonishing nano-scale analogues of hypodermic syringes that it uses to inject toxins into host cells.
    1. Microbiology and Infectious Disease

    Bacterial Protein Secretion: Looking inside an injection system

    Sophie A Howard, Alain Filloux
    The proteins injected by bacteria into eukaryotic organisms can lead to fates as diverse as death and metamorphosis.
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    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Single molecule mechanics resolves the earliest events in force generation by cardiac myosin

    Michael S Woody et al.
    Cardiac myosin converts energy from ATP into mechanical work by transitioning from a short-lived force-bearing state, to a post working stroke state before the release of inorganic phosphate.
    1. Neuroscience

    Increased expression of heme-binding protein 1 early in Alzheimer's disease is linked to neurotoxicity

    Oleksandr Yagensky et al.
    Increased levels of brain Hebp1 starting from the presymptomatic stage of Alzheimer’s disease contributes to progressive neuronal loss by triggering mitochondrial-dependent apoptosis in neurons exposed to elevated heme.
    1. Biochemistry and Chemical Biology

    Lack of activity of recombinant HIF prolyl hydroxylases (PHDs) on reported non-HIF substrates

    Matthew E Cockman et al.
    Assays using recombinant HIF prolyl hydroxylases did not support hydroxylation of more than 20 reported non-HIF substrates under conditions where robust HIF hydroxylation was observed.
    1. Developmental Biology

    Actomyosin regulation by Eph receptor signaling couples boundary cell formation to border sharpness

    Jordi Cayuso et al.
    Boundary cell identity and sharpening of borders are coupled in hindbrain development since both are regulated by mechanical tension.
    1. Cell Biology

    Molecular basis for dyneinopathies reveals insight into dynein regulation and dysfunction

    Matthew G Marzo et al.
    A mutagenesis screen in budding yeast sheds light on dynein regulation and function, and reveals the molecular basis for disease in patients suffering from neuropathies caused by dynein dysfunction.

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