1,555 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanochemical coupling and bi-phasic force-velocity dependence in the ultra-fast ring ATPase SpoIIIE

    Ninning Liu et al.
    Probing the DNA motor SpoIIIE at the single-molecule level has revealed its force-generating step, rich translocation dynamics during motor operation and a novel, bi-phasic mechanical response to opposing force.
    1. Structural Biology and Molecular Biophysics

    Two-subunit DNA escort mechanism and inactive subunit bypass in an ultra-fast ring ATPase

    Ninning Liu et al.
    The subunits of the SpoIIIE motor contact the 5'→3' strand of DNA in sequence to rapidly translocate the DNA across a membrane.
    1. Cell Biology
    2. Immunology and Inflammation

    ATP hydrolysis by the viral RNA sensor RIG-I prevents unintentional recognition of self-RNA

    Charlotte Lässig et al.
    Mutations within the ATPase domain of RIG-I in patients with Singleton-Merten Syndrome prevent ATP-hydrolysis dependent dissociation of RIG-I from double-stranded RNA and lead to unintentional constitutive signaling through increased binding of endogenous RNA.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    DNA binding polarity, dimerization, and ATPase ring remodeling in the CMG helicase of the eukaryotic replisome

    Alessandro Costa et al.
    The Mcm2-7 motor unwinds DNA using an approach distinct from that of superfamily III helicases, and accesses multiple ring configurations and assembly states during the initiation of DNA replication.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    How lamina-associated polypeptide 1 (LAP1) activates Torsin

    Brian A Sosa et al.
    LAP1 adopts an AAA+ like fold that, while unable to bind nucleotide, can enhance ATPase activity in the neighboring TorsinA protomer in an unusual heterohexameric ring, via an arginine finger.
    1. Structural Biology and Molecular Biophysics

    Regulation of RUVBL1-RUVBL2 AAA-ATPases by the nonsense-mediated mRNA decay factor DHX34, as evidenced by Cryo-EM

    Andres López-Perrote et al.
    Cryo-EM reveals the regulation of RUVBL1 and RUVBL2 AAA-ATPases by DHX34, a helicase involved in nonsense-mediated mRNA decay (NMD), and suggests mechanisms for how RUVBL1 and RUVBL2 function in NMD.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis for the disaggregase activity and regulation of Hsp104

    Alexander Heuck et al.
    Protein disaggregases employ two mechanically-linked ATPase rings that are under steric control by a wrapped-around coiled-coil belt.
    1. Cell Biology
    2. Developmental Biology

    CasExpress reveals widespread and diverse patterns of cell survival of caspase-3 activation during development in vivo

    Austin Xun Ding et al.
    Genetic labeling of cells that survive executioner caspase activity in Drosophila reveals distinct patterns in different tissues.
    1. Computational and Systems Biology
    2. Developmental Biology

    Single-cell transcriptomics of the Drosophila wing disc reveals instructive epithelium-to-myoblast interactions

    Nicholas J Everetts et al.
    A single-cell atlas of the developing Drosophila wing disc at two time points enables a detailed understanding of the signals exchanged between different cell populations during development.
    1. Immunology and Inflammation
    2. Structural Biology and Molecular Biophysics

    Unified mechanisms for self-RNA recognition by RIG-I Singleton-Merten syndrome variants

    Charlotte Lässig et al.
    RIG-I Singleton-Merten syndrome mutations either mimic or freeze the protein in an ATP-bound state and lead to autoimmune signalling through a gain-of-function recognition of self-RNA.

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