104 results found
    1. Genetics and Genomics

    Suppressing proteasome mediated processing of topoisomerase II DNA-protein complexes preserves genome integrity

    Nicholas Sciascia et al.
    Analysis of genome integrity in primary murine B-cells reveals how depleting 26S proteasome activity enhanced cell survival following treatment with topoisomerase poisons.
    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

    Metaphase chromosome structure is dynamically maintained by condensin I-directed DNA (de)catenation

    Ewa Piskadlo et al.
    Condensin I maintains chromosome organization throughout metaphase by preventing erroneous topoisomerase II-dependent sister chromatid re-entanglements.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Post-meiotic DNA double-strand breaks occur in Tetrahymena, and require Topoisomerase II and Spo11

    Takahiko Akematsu et al.
    The first genetic compelling evidence for post-meiotic DNA double-strand breaks and its relation to chromatin remodeling in haploid pronuclei is shown.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    A ribosome assembly stress response regulates transcription to maintain proteome homeostasis

    Benjamin Albert et al.
    Ribosome assembly is monitored to promote proteostatis through a system whereby unassembled ribosomal proteins lead to activation of heat shock factor 1 and inactivation of the RP gene activator Ifh1.
    1. Structural Biology and Molecular Biophysics

    CryoEM structures of open dimers of gyrase A in complex with DNA illuminate mechanism of strand passage

    Katarzyna M Soczek et al.
    CryoEM structures of open gyrase A dimers and DNA in two states representing steps either prior to or after passage through the DNA-gate, show where a putative T-segment is 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. Cell Biology
    2. Chromosomes and Gene Expression

    Meiosis: Stopping chromosomes from breaking bad

    Rima Sandhu, G Valentin Börner
    The scaffolding that holds chromosome pairs together plays a key role in limiting the levels of double-strand breaks.
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    1. Biochemistry and Chemical Biology

    Cancer: How does doxorubicin work?

    Anand G Patel, Scott H Kaufmann
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    1. Cancer Biology
    2. Computational and Systems Biology

    A curative combination cancer therapy achieves high fractional cell killing through low cross-resistance and drug additivity

    Adam C Palmer et al.
    Drugs in a curative chemotherapy regimen are independently effective and resisted by different mechanisms, so cancer cells have little chance of surviving all drugs, and this benefit occurs without synergistic interactions.

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