11 results found
    1. Chromosomes and Gene Expression
    2. Evolutionary Biology

    The DNA-binding protein HTa from Thermoplasma acidophilum is an archaeal histone analog

    Antoine Hocher et al.
    In Thermoplasma acidophilum, an archaeon without histones, a DNA-binding protein acquired from bacteria via horizontal gene transfer mediates histone-like chromatin architecture.
    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. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure of a AAA+ unfoldase in the process of unfolding substrate

    Zev A Ripstein et al.
    The structure of a substrate-engaged AAA+ unfoldase suggests a model for processive unfolding that is supported by biochemical data.
    1. Structural Biology and Molecular Biophysics

    Using the Volta phase plate with defocus for cryo-EM single particle analysis

    Radostin Danev et al.
    Building on previous work in cryo-electron microscopy (Entchev et al, 2015), it shown that a combination of the Volta phase plate and a small amount of defocus can simplify the experimental set-up, increase the data acquisition rate and improve resolution.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Lipoate-binding proteins and specific lipoate-protein ligases in microbial sulfur oxidation reveal an atpyical role for an old cofactor

    Xinyun Cao et al.
    An unexpected new biological function was discovered for the universally conserved cofactor lipoate, as lipoate-binding proteins proved essential for a novel wide-spread prokaryotic sulfur oxidation pathway.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM single particle analysis with the Volta phase plate

    Radostin Danev, Wolfgang Baumeister
    The Volta phase plate enables in-focus single particle analysis at near atomic resolutions, which could expand the capabilities of cryo-EM, especially for small, flexible or heterogeneous macromolecular samples.
    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. Chromosomes and Gene Expression
    2. Evolutionary Biology

    Chromatinization of Escherichia coli with archaeal histones

    Maria Rojec et al.
    Escherichia coli is surprisingly tolerant to chromatinization by archaeal histones, suggesting that histones can become established as ubiquitous chromatin proteins without interfering critically with some key DNA-templated processes.
    1. Biochemistry and Chemical Biology

    Immunoproteasome functions explained by divergence in cleavage specificity and regulation

    Michael B Winter et al.
    Divergence in immunoproteasome substrate specificity and regulation from the constitutive proteasome impacts peptide cleavage quantity and the cellular capacity of the ubiquitin-proteasome system.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Molecular dynamics-based refinement and validation for sub-5 Å cryo-electron microscopy maps

    Abhishek Singharoy et al.
    New hybrid structure determination methods leveraging the inherent biophysical properties of a macromolecule through molecular dynamics simulations provide accurate and cost-efficient ways of achieving atomic structures from high resolution cryo-electron density maps.

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