698 results found
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    KHNYN is essential for the zinc finger antiviral protein (ZAP) to restrict HIV-1 containing clustered CpG dinucleotides

    Mattia Ficarelli et al.
    KHNYN, a putative endoribonuclease, interacts with the zinc-finger antiviral protein (ZAP) and is required for the inhibition of HIV replication and RNA abundance by CpG dinucleotides.
    1. Cell Biology
    2. Developmental Biology

    Myofibril diameter is set by a finely tuned mechanism of protein oligomerization in Drosophila

    Nicanor González-Morales et al.
    Myofibril diameter is set by the controlled oligomerization of the PDZ and LIM domain protein Zasp in Drosophila.
    1. Cell Biology

    Switch-like Arp2/3 activation upon WASP and WIP recruitment to an apparent threshold level by multivalent linker proteins in vivo

    Yidi Sun et al.
    Intersectin counterparts in yeast recruit WASP and WIP to endocytic sites to establish a robust multivalent SH3 domain-PRM interaction network which gives actin assembly onset a switch-like behavior in vivo.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Lamellipodin promotes actin assembly by clustering Ena/VASP proteins and tethering them to actin filaments

    Scott D Hansen, R Dyche Mullins
    Lamellipodin, an important regulator of cytoskeletal and assembly cell migration, enhances the activity of Ena/VASP family actin polymerases by clustering them on leading-edge membranes and tethering them to actin filaments.
    1. Cell Biology

    Loss of Ena/VASP interferes with lamellipodium architecture, motility and integrin-dependent adhesion

    Julia Damiano-Guercio et al.
    Ena/VASP proteins act as positive regulators of cell motility and are required for the formation of microspikes, as opposed to filopodia that can arise from distinct molecular mechanisms.
    1. Immunology and Inflammation
    2. Structural Biology and Molecular Biophysics

    An electrostatic selection mechanism controls sequential kinase signaling downstream of the T cell receptor

    Neel H Shah et al.
    A high-throughput technique to characterize the substrate specificities of tyrosine kinases identifies the key features of kinases and substrates that enforce accurate signaling from T cell receptors.
    1. Cell Biology

    Direct comparison of clathrin-mediated endocytosis in budding and fission yeast reveals conserved and evolvable features

    Yidi Sun et al.
    Quantitative comparison of clathrin-mediated endocytosis in budding and fission yeast identified conserved mechanisms and species-specific adaptations with broad implications that extend from yeast to humans.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of synergistic activation of Arp2/3 complex by cortactin and N-WASP

    Luke A Helgeson, Brad J Nolen
    Single-molecule TIRF microscopy, biochemical assays and mathematical modeling demonstrate how actin-branch nucleation by the Arp2/3 complex is coordinately regulated by two biochemically distinct activators.
    1. Cell Biology
    2. Immunology and Inflammation

    Actin foci facilitate activation of the phospholipase C-γ in primary T lymphocytes via the WASP pathway

    Sudha Kumari et al.
    T cell receptor signaling is regulated by newly polymerized F-actin foci at the immunological synapse.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Three-color single molecule imaging shows WASP detachment from Arp2/3 complex triggers actin filament branch formation

    Benjamin A Smith et al.
    New insights into the mechanism responsible for the nucleation of branches on networks of actin filaments shed light on a process that is essential for eukaryotic cell motility and endocytosis.

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