457 results found
    1. Structural Biology and Molecular Biophysics

    Structure and in situ organisation of the Pyrococcus furiosus archaellum machinery

    Bertram Daum et al.
    Using both electron cryo-tomography and helical reconstruction, the first structure of the entire archaellum machinery with an assembled filament has been determined, providing the structural basis for our understanding of archaeal motility.
    1. Structural Biology and Molecular Biophysics

    2.8 Å resolution reconstruction of the Thermoplasma acidophilum 20S proteasome using cryo-electron microscopy

    Melody G Campbell et al.
    Water molecules and amino-acid side chain rotamers have been resolved in the cryoEM structure of T20S proteasome at 2.8 angstroms.
    1. Structural Biology and Molecular Biophysics

    Measuring the optimal exposure for single particle cryo-EM using a 2.6 Å reconstruction of rotavirus VP6

    Timothy Grant, Nikolaus Grigorieff
    The resolution of electron cryo-microscopy can be improved by using optimal exposure values to filter video frames.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Competing scaffolding proteins determine capsid size during mobilization of Staphylococcus aureus pathogenicity islands

    Altaira D Dearborn et al.
    Cryo-electron microscopy and genetics show how Staphylococcus aureus pathogenicity island 1 hijacks the assembly pathway of a helper phage for its own propagation.
    1. Structural Biology and Molecular Biophysics
    2. Immunology and Inflammation

    Structural basis for the prion-like MAVS filaments in antiviral innate immunity

    Hui Xu et al.
    Mitochondrial anti-viral signaling proteins form three-stranded helical filaments in launching innate immune responses against RNA viruses.
    1. Structural Biology and Molecular Biophysics

    All-atom molecular dynamics of the HBV capsid reveals insights into biological function and cryo-EM resolution limits

    Jodi A Hadden et al.
    All-atom molecular dynamics of the HBV capsid supports a role for structural asymmetry in biological function, reveals the potential for triangular pores to mediate cellular signaling, and indicates that capsid flexibility may limit resolution attainable by cryo-EM.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Hepatitis B virus core protein allosteric modulators can distort and disrupt intact capsids

    Christopher John Schlicksup et al.
    Small molecule antivirals that drive assembly of HBV capsid protein can also bind to pre-assembled capsids causing them to change morphology or even break, suggesting a complex transduction of binding effects across the capsid.
    1. Structural Biology and Molecular Biophysics

    Ambiguities in helical reconstruction

    Edward H Egelman
    While electron microscopic helical reconstruction is a powerful technique in structural biology, mistakes can be made in determining the helical symmetry, leading to structures that are artifactual.
    1. Structural Biology and Molecular Biophysics

    Heparin-induced tau filaments are polymorphic and differ from those in Alzheimer’s and Pick’s diseases

    Wenjuan Zhang et al.
    Cryo-EM structures of heparin-induced tau filaments differ from those observed in neurodegenerative disease, illustrating their structural versatility, and prompting questions about the relevance of in vitro amyloid models.

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