545 results found
    1. Cell Biology

    The step-wise pathway of septin hetero-octamer assembly in budding yeast

    Andrew Weems, Michael McMurray
    In budding yeast cells, slow monomeric septin GTPase activity and the cytosolic GTP:GDP ratio dictate the relative incorporation of alternative subunits during septin hetero-oligomer assembly, which proceeds by discrete, ordered steps dependent on allostery between interaction interfaces.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Influenza-virus membrane fusion by cooperative fold-back of stochastically induced hemagglutinin intermediates

    Tijana Ivanovic et al.
    Long-lived intermediate states formed by glycoprotein catalysts are an essential part of the process used by influenza virus particles to infect cells.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Molecular mechanism to target the endosomal Mon1-Ccz1 GEF complex to the pre-autophagosomal structure

    Jieqiong Gao et al.
    The endosomal GEF Mon1-Ccz1 binds to Atg8 on autophagosomes, and recruits its substrate, the Rab7-like Ypt7, which then mediates fusion of the autophagosomes with the lysosome.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Regulating G protein-coupled receptors by topological inversion

    Bray Denard et al.
    Multiple biochemical assays show that the topology of CCR5 and possibly other GPCRs may be inverted by ceramide or other sphingolipids through the process of regulated alternative translocation.
    1. Developmental Biology

    The Glide/Gcm fate determinant controls initiation of collective cell migration by regulating Frazzled

    Tripti Gupta et al.
    The role of the Frazzled chemoattractant receptor is to triggers migration initiation as part of the glial developmental program induced by the Glide/Gcm transcription factor.
    1. Immunology and Inflammation

    Lymph node stromal cells constrain immunity via MHC class II self-antigen presentation

    Antonio P Baptista et al.
    MHC class II-mediated self-antigen presentation by lymph node stromal cells controls regulatory T cell homeostasis, thus safeguarding immune tolerance.
    1. Computational and Systems Biology
    2. Immunology and Inflammation

    Digital signaling decouples activation probability and population heterogeneity

    Ryan A Kellogg et al.
    Digital NF-κB signaling achieves orthogonal control over the probability of activation (percentage of activated cells) and dynamic response heterogeneity in the population via the area and shape of the input profile.
    1. Cell Biology
    2. Developmental Biology

    Proteolytic processing of palmitoylated Hedgehog peptides specifies the 3-4 intervein region of the Drosophila wing

    Sabine Schürmann et al.
    Proteolysis of lipidated N-terminal peptides that tether Hedgehog morphogens to the surface of source cells is absolutely required for their coupled release and bioactivation in vivo in Drosophila melanogaster.
    1. Genetics and Genomics

    Firefly genomes illuminate parallel origins of bioluminescence in beetles

    Timothy R Fallon et al.
    The first genomic view of beetle luciferase evolution indicates evolutionary independence of luciferase between fireflies and click-beetles, and provide valuable datasets which will accelerate the discovery of new biotechnological tools.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    iTAP, a novel iRhom interactor, controls TNF secretion by policing the stability of iRhom/TACE

    Ioanna Oikonomidi et al.
    Secretion of the inflammatory cytokine TNF requires a protein called iTAP/FrmD8, which controls the cell surface stability of the TNF shedding machinery, iRhom2 and TACE/ADAM17.

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