4,758 results found
    1. Cell Biology
    2. Human Biology and Medicine

    A critical role for mTORC1 in erythropoiesis and anemia

    Zachary A Knight et al.
    Transcription profiling of activated cells using Phospho-Trap, a new method for identifying activated cells, reveals a critical role for mTOR signaling in red blood cell development and the pathogenesis of anemia
    1. Biochemistry
    2. Biophysics and Structural Biology

    A conserved MCM single-stranded DNA binding element is essential for replication initiation

    Clifford A Froelich et al.
    The crystal structure of the MCM helicase bound to single-stranded DNA reveals a binding motif that is critical for cell viability, helicase activation and DNA replication.
    1. Biophysics and Structural Biology
    2. Cell Biology

    A mutation uncouples the tubulin conformational and GTPase cycles, revealing allosteric control of microtubule dynamics

    Elisabeth A Geyer et al.
    A buried mutation in αβ-tubulin reveals an allosteric response to GDP in the lattice that dictates microtubule catastrophe and shrinking.
    1. Immunology
    2. Microbiology and Infectious Disease

    A model symbiosis reveals a role for sheathed-flagellum rotation in the release of immunogenic lipopolysaccharide

    Caitlin A Brennan et al.
    Both beneficial and pathogenic bacteria can use their sheathed flagella during host colonization as a novel toxin-/signal-delivery mechanism.
    1. Biochemistry
    2. Biophysics and Structural Biology

    Structure of a AAA+ unfoldase in the process of unfolding substrate

    Zev A Ripstein et al.
    The structure of a substrate-engaged AAA+ unfoldase suggests a model for processive unfolding that is supported by biochemical data.
    1. Biophysics and Structural Biology
    2. Plant Biology

    Structural basis of pathogen recognition by an integrated HMA domain in a plant NLR immune receptor

    A Maqbool et al.
    Structure/function studies of a plant pathogen effector in complex with a host disease resistance protein domain reveal the molecular basis for recognition and underpin future engineering of immunity in crops.
    1. Developmental Biology and Stem Cells
    2. Genomics and Evolutionary Biology

    A widely employed germ cell marker is an ancient disordered protein with reproductive functions in diverse eukaryotes

    Michelle A Carmell et al.
    GCNA proteins comprise a previously unnoticed family of proteins that has been enriched in cells carrying a heritable genome since the invention of sexual reproduction in eukaryotes, and has had reproductive function for at least 600 million years.
    1. Biophysics and Structural Biology
    2. Developmental Biology and Stem Cells

    Drosophila Nanos acts as a molecular clamp that modulates the RNA-binding and repression activities of Pumilio

    Chase A Weidmann et al.
    Crystal structures of Nanos bound to Pumilio and target RNAs demonstrate how Nanos forms a molecular clamp to alter Pumilio RNA regulation and specificity in embryonic development and germline maintenance.
    1. Biochemistry
    2. Biophysics and Structural Biology

    Relief of autoinhibition by conformational switch explains enzyme activation by a catalytically dead paralog

    Oleg A Volkov et al.
    A catalytically dead paralog activates its cognate enzyme through an allosteric mechanism that combined structural and phylogenomic analysis indicates arose through acquisition of a dimerization domain, suggesting a general model for how complex allostery evolves.
    1. Developmental Biology and Stem Cells
    2. Neuroscience

    Supporting cells remove and replace sensory receptor hair cells in a balance organ of adult mice

    Stephanie A Bucks et al.
    Cell fate-mapping with genetically-modified mouse models and cellular markers demonstrates that sensory hair cells in the vestibular portion of the inner ear are a dynamic population in adult mice that undergo cell death and replacement under normal conditions.

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