951 results found
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structure in situ reveals a molecular switch that safeguards virus against genome loss

    Oliver W Bayfield et al.
    Structure of the portal protein of a thermostable virus, determined in its capsid-bound state, reveals a molecular mechanism that prevents DNA slippage during genome packaging.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Efficient support of virus-like particle assembly by the HIV-1 packaging signal

    Mauricio Comas-Garcia et al.
    The packaging signal in HIV-1 genomic RNA supports in vitro particle assembly more efficiently than control RNAs, probably explaining its selective packaging during virus assembly in vivo.
    1. Biochemistry and Chemical Biology
    2. Cancer Biology

    Y-box protein 1 is required to sort microRNAs into exosomes in cells and in a cell-free reaction

    Matthew J Shurtleff et al.
    A cell-free reaction that reconstitutes the selective sorting of a miRNA into exosomes reveals an RNA-binding protein, YBX1, as a critical sorting factor.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Protein-mediated RNA folding governs sequence-specific interactions between rotavirus genome segments

    Alexander Borodavka et al.
    In rotaviruses, the selective packaging of eleven distinct genomic RNA segments requires virus-encoded protein NSP2 to alter the RNA structures, facilitating their interactions with each other.
    1. Structural Biology and Molecular Biophysics

    Viral genome structures are optimal for capsid assembly

    Jason D Perlmutter et al.
    Computer simulations reveal that viral nucleic acids have an ideal structure for being packaged into outer protein shells called capsids.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    A pentameric protein ring with novel architecture is required for herpesviral packaging

    Allison L Didychuk et al.
    The first structures of Kaposi’s sarcoma-associated herpesvirus ORF68 and Epstein–Barr virus BFLF1, conserved and essential proteins required in herpesviruses, reveal new insights into viral genome packaging.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    A new topology of the HK97-like fold revealed in Bordetella bacteriophage by cryoEM at 3.5 Å resolution

    Xing Zhang et al.
    Cryo electron microscopy and structure-based mutagenesis reveal that the bacteriophage BPP-1 contains two of the three major recognized viral folds, one of which exhibits a new topology.
    1. Cell Biology

    Genome-wide interrogation of extracellular vesicle biology using barcoded miRNAs

    Albert Lu et al.
    A screen using artificially barcoded, exosomal microRNAs, paired with CRISPR guide RNAs, helped identify new players in multivesicular endosome exocytosis and a role for Wnt signaling.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    MutS/MutL crystal structure reveals that the MutS sliding clamp loads MutL onto DNA

    Flora S Groothuizen et al.
    Visualization of the sliding clamp in DNA mismatch repair shows how a transient complex is activated.
    1. Developmental Biology

    Deficient spermiogenesis in mice lacking Rlim

    Feng Wang et al.
    Genetic analyses in mice identifies Rlim in the spermatogenic cell lineage as a regulator of cytoplasmic reduction during spermiogenesis.

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