401 results found
    1. Cell Biology

    Spatiotemporal regulation of autophagy during Caenorhabditis elegans aging

    Jessica T Chang et al.
    Autophagic flux assays in the nematode Caenorhabditis elegans suggest that autophagy decreases during normal aging, whereas long-lived daf-2 and glp-1 mutants maintain autophagic capacity in distinct spatiotemporal-specific manners to extend lifespan.
    1. Developmental Biology

    Loss of Ptpn11 (Shp2) drives satellite cells into quiescence

    Joscha Griger et al.
    The stem cells of the postnatal muscle allow postnatal muscle growth and repair and withdraw from the cell cycle when the tyrosine phosphatase Ptpn11 (Shp2) is inhibited or mutated in mice.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Polo-like kinase-dependent phosphorylation of the synaptonemal complex protein SYP-4 regulates double-strand break formation through a negative feedback loop.

    Saravanapriah Nadarajan et al.
    PLK-1/2-mediated SYP-4 phosphorylation is dependent on crossover precursor formation, triggering a switch in the dynamic state of the synaptonemal complex that reduces the formation of further double-strand breaks at late meiotic prophase.
    1. Cell Biology
    2. Neuroscience

    Presynaptic morphology and vesicular composition determine vesicle dynamics in mouse central synapses

    Laurent Guillaud et al.
    In central synapses, the mobility and supply of synaptic vesicles are determined by two independent biological factors: the morphological and structural organization of nerve terminals and the molecular signature of vesicles.
    1. Developmental Biology
    2. Evolutionary Biology

    Domestic chickens activate a piRNA defense against avian leukosis virus

    Yu Huining Sun et al.
    To protect the germ line genome, chickens acquire new small RNA-based immune defense in response to recently endogenized retroviruses by turning a truncated provirus into a weapon.
    1. Developmental Biology

    Calcium handling precedes cardiac differentiation to initiate the first heartbeat

    Richard CV Tyser et al.
    High-resolution live imaging reveals how and when the mouse heart first starts to beat during development and how the onset of beating impacts on heart muscle cell maturation and heart formation.
    1. Cell Biology
    2. Physics of Living Systems

    Interplay of cell dynamics and epithelial tension during morphogenesis of the Drosophila pupal wing

    Raphaël Etournay et al.
    Autonomous patterns of cell contraction in the context of localized apical extracellular matrix constraints specify tissue stresses that reshape the wing epithelium.
    1. Computational and Systems Biology
    2. Evolutionary Biology

    Further support for aneuploidy tolerance in wild yeast and effects of dosage compensation on gene copy-number evolution

    Audrey P Gasch et al.
    Many natural isolates of budding yeast carry extra chromosome copies and show lower-than-expected expression at a subset of amplified genes, which show unique evolutionary signatures.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Whole genome comparison of a large collection of mycobacteriophages reveals a continuum of phage genetic diversity

    Welkin H Pope et al.
    A continuum of genome relationships is discovered through comparative genomics of 627 sequenced mycobacteriophages isolated and characterized in an integrated research/education initiative.

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