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    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The force-sensing peptide VemP employs extreme compaction and secondary structure formation to induce ribosomal stalling

    Ting Su et al.
    The structure of the VemP-stalled ribosome reveals a helix-double turn-helix conformation of the nascent chain within the ribosomal tunnel, illustrating how secondary structure formation directly at the peptidyltransferase center of the ribosome can induce translational arrest.
    1. Cell Biology
    2. Developmental Biology

    Macrophages are necessary for epimorphic regeneration in African spiny mice

    Jennifer Simkin et al.
    Inflammatory cells differentially regulate a scarring versus a regenerating response to injury in mammals.
    1. Evolutionary Biology

    Homo naledi and Pleistocene hominin evolution in subequatorial Africa

    Lee R Berger et al.
    A late Middle Pleistocene age for Homo naledi demonstrates a diversity of hominin species in Africa at this critical time in the archaeological record.
    1. Neuroscience

    Epigenetic regulation of lateralized fetal spinal gene expression underlies hemispheric asymmetries

    Sebastian Ocklenburg et al.
    Gene expression asymmetries in fetal spinal cord are triggered by epigenetic mechanisms suggesting that handedness has a spinal instead of a cortical origin.
    1. Ecology

    Transcriptome analysis illuminates the nature of the intracellular interaction in a vertebrate-algal symbiosis

    John A Burns et al.
    The endosymbiosis between an alga and the spotted salamander shows several parallels to invertebrate-algal symbioses as well as to pathogen associations in vertebrate animals.
    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
    2. Genetics and Genomics

    The genome of the crustacean Parhyale hawaiensis, a model for animal development, regeneration, immunity and lignocellulose digestion

    Damian Kao et al.
    The first malacostracan genome sequence will establish the genetically tractable Parhyale hawaiensis as a model organism in this key animal group.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Ensemble cryo-EM uncovers inchworm-like translocation of a viral IRES through the ribosome

    Priyanka D Abeyrathne et al.
    An ensemble of cryo-EM structures reveals how eukaryotic elongation factor 2 positions the first codon of a viral mRNA for translation.
    1. Cell Biology
    2. Stem Cells and Regenerative Medicine

    Cell-cycle quiescence maintains Caenorhabditis elegans germline stem cells independent of GLP-1/Notch

    Hannah S Seidel, Judith Kimble
    C. elegans germline stem cells become quiescent under starved conditions, and this quiescence maintains the stem cell state even in the absence of GLP-1/Notch signaling, which is otherwise essential for stem cell maintenance.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Immune genes are hotspots of shared positive selection across birds and mammals

    Allison J Shultz, Timothy B Sackton
    Pathogens, particularly viruses, target the same genes over deep evolutionary time, resulting in shared signatures of positive selection and transcriptional responses at the same genes.