760 results found
    1. Structural Biology and Molecular Biophysics

    Reconstitution of selective HIV-1 RNA packaging in vitro by membrane-bound Gag assemblies

    Lars-Anders Carlson et al.
    In vitro reconstitution shows how HIV-1 Gag assemblies on membranes can package the RNA genome in the presence of a vast excess of competing cellular RNAs, and that selectivity and immature lattice assembly are deeply intertwined with one another.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Dissection of specific binding of HIV-1 Gag to the 'packaging signal' in viral RNA

    Mauricio Comas-Garcia et al.
    While HIV-1 Gag protein binds tightly to several RNAs, it binds to the viral RNA 'packaging signal' with higher specificity than to control RNAs.
    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

    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. 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. 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.
    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. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Dosage compensation can buffer copy-number variation in wild yeast

    James Hose et al.
    Dosage-compensated gene expression facilitates chromosomal aneuploidy, which presents a rapid route to phenotypic evolution in natural yeast isolates.
    1. Microbiology and Infectious Disease

    Experimentally guided models reveal replication principles that shape the mutation distribution of RNA viruses

    Michael B Schulte et al.
    A mathematical model that combines stochasticity and spatial structure describes the dynamics of the viral population during an infection cycle, and fitting the model to RNA and virus abundances over time shows that poliovirus follows a geometric replication mode.

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