837 results found
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    MutSα maintains the mismatch repair capability by inhibiting PCNA unloading

    Yoshitaka Kawasoe et al.
    Biochemical analysis in Xenopus egg extracts reveals that the MutSα mismatch sensor retains the DNA-bound replication clamp to maintain a post-replicative temporal window permissive to strand-specific repair of mismatches.
    1. Genetics and Genomics

    Mismatch repair deficiency endows tumors with a unique mutation signature and sensitivity to DNA double-strand breaks

    Hui Zhao et al.
    A comprehensive catalogue of somatic mutations accumulating in MMR-deficient tumors highlights their relevance in the context of human genetic evolution, for the diagnosis of microsatellite instability and the provision of targeted treatment options.
    1. Biochemistry and Chemical Biology
    2. Cancer Biology

    Explosive mutation accumulation triggered by heterozygous human Pol ε proofreading-deficiency is driven by suppression of mismatch repair

    Karl P Hodel et al.
    When mismatch repair is compromised heterozygous loss of Pol ε proofreading is sufficient to drive a subset of the observed clinical characteristics of Pol ε tumors.
    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. Cancer Biology
    2. Genetics and Genomics

    Mismatch repair-signature mutations activate gene enhancers across human colorectal cancer epigenomes

    Stevephen Hung et al.
    Non-coding mutations in microsatellite-instable (MSI) colorectal tumors are prevalent and activate cancer-specific enhancers, thereby disrupting gene expression control.
    1. Microbiology and Infectious Disease

    Natural mismatch repair mutations mediate phenotypic diversity and drug resistance in Cryptococcus deuterogattii

    R Blake Billmyre et al.
    Eukaryotic pathogens, like Cryptococcus deuterogattii, can use elevated mutation rates to more rapidly adapt to stresses, such as drug challenges, but at the cost of lower fitness in less stressful environments.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Repair of naturally occurring mismatches can induce mutations in flanking DNA

    Jia Chen et al.
    The repair of spontaneous DNA damage can introduce mutators that lead to further genetic changes, which could underlie evolutionary change, disease and aging.
    1. Chromosomes and Gene Expression

    High-resolution mapping of heteroduplex DNA formed during UV-induced and spontaneous mitotic recombination events in yeast

    Yi Yin et al.
    Genome-wide mapping of heteroduplex DNA (a recombination intermediate) formed during mitotic recombination in yeast demonstrates that the "classical" model of double-strand DNA break repair is inadequate to explain several aspects of mitotic recombination.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Concerted action of the MutLβ heterodimer and Mer3 helicase regulates the global extent of meiotic gene conversion

    Yann Duroc et al.
    Meiotic cells employ a specific pathway to limit the amount of gene conversion occuring at recombination sites.

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