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    1. Stem Cells and Regenerative Medicine

    Transgenerational dynamics of rDNA copy number in Drosophila male germline stem cells

    Kevin L Lu et al.
    rDNA copy number is shown to dynamically change during aging and through generations, and is actively maintained in male germline of Drosophila.
    1. Chromosomes and Gene Expression

    High levels of histones promote whole-genome-duplications and trigger a Swe1WEE1-dependent phosphorylation of Cdc28CDK1

    Douglas Maya Miles et al.
    Ploidy is stably maintained in Saccharomyces cerevisae by a tight coordination between histone levels and cell cycle events.
    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. Developmental Biology

    Negative regulation of G2-M by ATR (mei-41)/Chk1(Grapes) facilitates tracheoblast growth and tracheal hypertrophy in Drosophila

    Amrutha Kizhedathu et al.
    ATR/Chk1 contribute to G2 arrest in developing tracheoblasts, and arrest in G2 facilitates cellular and hypertrophic organ growth.
    1. Cell Biology

    Reactivation of RNA metabolism underlies somatic restoration after adult reproductive diapause in C. elegans

    Nikolay Burnaevskiy et al.
    Morphological and functional rejuvenation upon exit from adult reproductive diapause in C. elegans is independent of germline signaling, but instead involves somatic nucleolar activation and expansion of the RNA pool.
    1. Developmental Biology

    Fizzy-Related dictates A cell cycle switch during organ repair and tissue growth responses in the Drosophila hindgut

    Erez Cohen et al.
    Ploidy-increasing endocycles may represent a tradeoff between loss of regenerative capacity and preservation of tissue architecture.
    1. Chromosomes and Gene Expression

    Six domesticated PiggyBac transposases together carry out programmed DNA elimination in Paramecium

    Julien Bischerour et al.
    The machinery that carries out programmed DNA rearrangements is composed of domesticated transposases. One is catalytically active, five play architectural function essential for the accuracy of the process.
    1. Stem Cells and Regenerative Medicine

    Long-term live imaging of the Drosophila adult midgut reveals real-time dynamics of division, differentiation and loss

    Judy Lisette Martin et al.
    A new platform for imaging live Drosophila adults yields vivid movies of the midgut over prolonged time scales, opening the door to the real-time study of organ renewal dynamics in a near-native context.
    1. Chromosomes and Gene Expression

    The RNA helicase UPF1 associates with mRNAs co-transcriptionally and is required for the release of mRNAs from gene loci

    Anand K Singh et al.
    UPF1 associates with nascent transcripts and plays a broad role in nuclear processes of gene expression.
    1. Plant Biology

    A regulatory module controlling stress-induced cell cycle arrest in Arabidopsis

    Naoki Takahashi et al.
    Arabidopsis deploys the core signalling module that perceives distinct stress signals, such as DNA damage and heat stresses, and represses G2/M-specific genes, thereby causing cell cycle arrest.