711 results found
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    SPRTN is a mammalian DNA-binding metalloprotease that resolves DNA-protein crosslinks

    Jaime Lopez-Mosqueda et al.
    SPRTN is a protease essential for the repair of cytotoxic DNA-protein cross links and this function is defective in patients afflicted with Ruijs-Aalfs syndrome -a segmental progeroid syndrome.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis of transcription arrest by coliphage HK022 Nun in an Escherichia coli RNA polymerase elongation complex

    Jin Young Kang et al.
    Cryo-electron microscopy structures show how coliphage HK022 Nun blocks Escherichia coli RNA polymerase translocation by mediating multiple interactions between the RNA polymerase and nucleic acids.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Topoisomerase VI senses and exploits both DNA crossings and bends to facilitate strand passage

    Timothy J Wendorff, James M Berger
    The engagement of DNA crossings is shown to license ATP hydrolysis and DNA cleavage by topoisomerase VI, a finding with mechanistic ramifications for related GHKL ATPases and meiotic recombination machineries.
    1. Cell Biology

    The unfolded protein response and endoplasmic reticulum protein targeting machineries converge on the stress sensor IRE1

    Diego Acosta-Alvear et al.
    The coordination of protein targeting to the endoplasmic reticulum and the unfolded protein response through the stress sensor IRE1 ensures quality control of the secreted and transmembrane proteomes.
    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. Chromosomes and Gene Expression

    The CDK-PLK1 axis targets the DNA damage checkpoint sensor protein RAD9 to promote cell proliferation and tolerance to genotoxic stress

    Takeshi Wakida et al.
    Minimizing anti-proliferation signaling from DNA damage detection machinery is the tactic for the cells to drive proliferation under genotoxic environment, and the function is exerted by Polo-Like-Kinase1 that is frequently over-expressed in cancer cells.
    1. Structural Biology and Molecular Biophysics

    Molecular architecture of the 90S small subunit pre-ribosome

    Qi Sun et al.
    The nearly complete architecture of the gigantic 90S precursor of small ribosomal subunit is determined by cryo-EM.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    Live-cell mapping of organelle-associated RNAs via proximity biotinylation combined with protein-RNA crosslinking

    Pornchai Kaewsapsak et al.
    Live-cell nanometer-resolution RNA labeling method enables transcriptome-wide mapping of endogenous RNAs in nuclear, cytosol, ER, and mitochondrial subcompartments.
    1. Chromosomes and Gene Expression

    A synthetic biology approach to probing nucleosome symmetry

    Yuichi Ichikawa et al.
    A novel system for expression of asymmetric nucleosomes in vivo enables mechanistic studies on histone modification readouts in the cell.

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