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    1. Chromosomes and Gene Expression
    2. Microbiology and Infectious Disease

    Recombinational branch migration by the RadA/Sms paralog of RecA in Escherichia coli

    Deani L Cooper, Susan T Lovett
    The role of the bacterial protein RadA in homologous recombination – a DNA repair pathway vital to all cells – is defined.
    1. Chromosomes and Gene Expression

    Recombination occurs within minutes of replication blockage by RTS1 producing restarted forks that are prone to collapse

    Michael O Nguyen et al.
    Homologous recombination is the default response to replication impedance by the RTS1 barrier, leading to restarted replication forks that suffer frequent collapse, triggering further rounds of recombination downstream of the barrier.
    1. Microbiology and Infectious Disease

    Unbiased homeologous recombination during pneumococcal transformation allows for multiple chromosomal integration events

    Jun Kurushima et al.
    DNA uptake and recombination in pneumococcus are highly efficient and independent of the cell-cycle or genetic location of the transformed allele, but limited to maximally 50% of the population.
    1. Chromosomes and Gene Expression

    The homologous recombination machinery modulates the formation of RNA–DNA hybrids and associated chromosome instability

    Lamia Wahba et al.
    When a protein involved in DNA repair malfunctions, it can anneal RNA molecules to DNA molecules, creating hybrids that increase the frequency of mutations in the DNA.
    1. Genetics and Genomics

    Telomeres: Getting to grips with circular chromosomes

    Constance Nugent, Katsunori Sugimoto
    A strain of budding yeast that contains one large chromosome reveals how the telomere capping complex CST maintains linear but not circular chromosomes.
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    1. Chromosomes and Gene Expression

    Inter-Fork Strand Annealing causes genomic deletions during the termination of DNA replication

    Carl A Morrow et al.
    The discovery of a mechanism that causes DNA deletions during non-canonical DNA replication termination is described.
    1. Cancer Biology
    2. Chromosomes and Gene Expression

    Functional and mutational landscapes of BRCA1 for homology-directed repair and therapy resistance

    Rachel W Anantha et al.
    Systematic analyses of natural variants and artificial mutants establish functional landscapes of BRCA1 for homology-directed repair (HDR) and therapy resistance and identify the BRCA1-PALB2 interaction as a key control point for HDR pathway choice.
    1. Cell Biology
    2. Genetics and Genomics

    The histone modification reader ZCWPW1 links histone methylation to PRDM9-induced double-strand break repair

    Tao Huang et al.
    ZCWPW1 is a histone modification reader that localizes to DMC1-labelled double-strand break hotspots in a largely PRDM9-dependent manner, where it facilitates completion of synapsis by mediating DSB repair process.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    An advanced cell cycle tag toolbox reveals principles underlying temporal control of structure-selective nucleases

    Julia Bittmann et al.
    The development of an advanced cell cycle tag toolbox will enable a wide variety of cell cycle studies and shows post-replicative function of nucleases resolving replication/recombination structures.
    1. Chromosomes and Gene Expression

    The Fml1-MHF complex suppresses inter-fork strand annealing in fission yeast

    Io Nam Wong et al.
    Genomic deletions formed from inter-fork strand annealing associated with a collapsed replication fork are suppressed by the FANCM-related DNA helicase Fml1 in conjunction with its partner proteins Mhf1 and Mhf2.