466 results found
    1. Neuroscience

    Ultrastructural comparison of dendritic spine morphology preserved with cryo and chemical fixation

    Hiromi Tamada et al.
    Cryo preservation of brain tissue reveals dendritic spines with thinner necks compared to those prepared with chemical fixation.
    1. Neuroscience

    Ultrastructural analysis of adult mouse neocortex comparing aldehyde perfusion with cryo fixation

    Natalya Korogod et al.
    Snap-freezing of brain tissue reveals its true structure-showing that cells are less squashed together, and the connections between neurons are less enclosed than previously thought.
    1. Structural Biology and Molecular Biophysics
    2. Plant Biology

    Native architecture of the Chlamydomonas chloroplast revealed by in situ cryo-electron tomography

    Benjamin D Engel et al.
    The first 3D views of the native algal chloroplast provide new insights into thylakoid biogenesis, photosynthesis, and carbon fixation.
    1. Neuroscience

    Circular oligomerization is an intrinsic property of synaptotagmin

    Jing Wang et al.
    Calcium-binding synaptotagmins are involved in ring oligomer formation, which allows synaptotagmins to synchronize neurotransmitter release to Ca2+ influx.
    1. Neuroscience

    Ultrastructural heterogeneity of layer 4 excitatory synaptic boutons in the adult human temporal lobe neocortex

    Rachida Yakoubi et al.
    Neocortical synapses in layer 4 of the human temporal lobe neocortex were quantitatively characterized, at the subcellular level, using high-end, high-resolution electron microscopy and 3D-volume reconstructions.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular mechanisms of gating in the calcium-activated chloride channel bestrophin

    Alexandria N Miller et al.
    Cryo-EM structures of the gating cycle of bestrophin reveal the molecular underpinnings of activation and inactivation gating in this calcium-activated chloride channel and reveal a surprisingly wide pore.
    1. Microbiology and Infectious Disease

    In situ imaging of bacterial outer membrane projections and associated protein complexes using electron cryo-tomography

    Mohammed Kaplan et al.
    Electron cryo-tomography reveals that bacteria can form structurally-diverse outer membrane extensions with various protein complexes associated with them.
    1. Microbiology and Infectious Disease

    Integrase-RNA interactions underscore the critical role of integrase in HIV-1 virion morphogenesis

    Jennifer L Elliott et al.
    HIV-1 integrase-RNA interactions account for the key role of integrase in particle maturation.
    1. Structural Biology and Molecular Biophysics

    Structure of human Frizzled5 by fiducial-assisted cryo-EM supports a heterodimeric mechanism of canonical Wnt signaling

    Naotaka Tsutsumi et al.
    Cryo-EM structure of monomeric human Frizzled5 was determined with a universal fiducial antibody at 3.7 Å overall resolution, which supports a simple Fzd/LRP6 heterodimerization mechanism of canonical Wnt/β-catenin signaling.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure of Vps4 with circular peptides and implications for translocation of two polypeptide chains by AAA+ ATPases

    Han Han et al.
    Structural and biochemical studies indicate that AAA+ ATPase employ a general mechanism to translocate a variety of substrates, including extended polypeptides, hairpins, crosslinked chains, and chains conjugated to other molecules.

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