323 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cofilin-induced unidirectional cooperative conformational changes in actin filaments revealed by high-speed atomic force microscopy

    Kien Xuan Ngo et al.
    A cluster of cofilin along an otherwise bare actin filament induces distinctively asymmetric cooperative conformational changes to the filament on either side of the cluster.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Modulation of formin processivity by profilin and mechanical tension

    Luyan Cao et al.
    Profilin helps to maintain formin at the growing barbed end of an actin filament, while piconewton mechanical tension drastically enhances formin dissociation from the barbed end.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Competition between Tropomyosin, Fimbrin, and ADF/Cofilin drives their sorting to distinct actin filament networks

    Jenna R Christensen et al.
    Both cooperative and competitive associations of actin binding proteins with actin filaments help drive the self-organization of functionally diverse F-actin networks in fission yeast.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Virology: Pushing the envelope

    Julia H Wildschutte, John M Coffin
    Primates have co-opted a viral gene to produce an envelope protein that prevents infection by the HERV-T virus and likely contributed to the extinction of this virus.
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    1. Computational and Systems Biology
    2. Microbiology and Infectious Disease

    Multiple sources of slow activity fluctuations in a bacterial chemosensory network

    Remy Colin et al.
    Single-cell FRET measurements reveal large temporal activity fluctuations within this signaling pathway in Escherichia coli, caused by stochasticity of receptor methylation combined with allosteric interactions and slow rearrangements within receptor clusters.
    1. Cancer Biology
    2. Cell Biology

    NADPH oxidase-mediated redox signaling promotes oxidative stress resistance and longevity through memo-1 in C. elegans

    Collin Yvès Ewald et al.
    Genetic analysis reveals NADPH oxidase generated reactive oxygen species as signals to re-establish cellular homeostasis during aging via activating a transcriptional response.
    1. Cell Biology

    Quantitative regulation of the dynamic steady state of actin networks

    Angelika Manhart et al.
    Cells are able to control the actin network length and steering by adjusting geometric, structural, or biochemical parameters such as ADF/Cofilin and actin concentrations, and network width.
    1. Epidemiology and Global Health
    2. Microbiology and Infectious Disease

    Science Forum: Improving pandemic influenza risk assessment

    Colin A Russell et al.
    Predicting the pandemic potential of influenza viruses from genetic sequence data could transform pandemic risk assessment but progress towards this goal will require the integration of experimental work, computational tools, and virus surveillance.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Eukaryotic translation initiation factor 3 plays distinct roles at the mRNA entry and exit channels of the ribosomal preinitiation complex

    Colin Echeverría Aitken et al.
    Eukaryotic translation initiation factor 3 (eIF3) is required to stabilize the binding of mRNA at the exit channel of the small ribosomal subunit and acts at the entry channel to accelerate mRNA recruitment to the translation preinitiation complex.
    1. Microbiology and Infectious Disease

    Longitudinal imaging of HIV-1 spread in humanized mice with parallel 3D immunofluorescence and electron tomography

    Collin Kieffer et al.
    Combined tissue clearing, 3D-immunofluorescence, and electron tomography spatially revealed the dynamics of early HIV-1 spread within lymphoid tissues of humanized mice at the resolution of single cells and individual virions.

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