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

    Head-to-tail interactions of the coiled-coil domains regulate ClpB activity and cooperation with Hsp70 in protein disaggregation

    Marta Carroni et al.
    Overcoming image-processing problems in the analysis of the ClpB chaperone provides a new structural model and regulatory mechanism, based on clear density for the coiled-coil domain and supported by various biochemical data.
    1. Biochemistry and Chemical Biology

    Regulatory coiled-coil domains promote head-to-head assemblies of AAA+ chaperones essential for tunable activity control

    Marta Carroni et al.
    Head-to-head interactions of regulatory coiled-coil domains control activity of the central bacterial AAA+ protein ClpC by promoting formation of a reversible resting state.
    1. Microbiology and Infectious Disease

    Prion propagation can occur in a prokaryote and requires the ClpB chaperone

    Andy H Yuan et al.
    The bacterium Escherichia coli possesses a permissive cytoplasmic environment and the requisite molecular machinery to support the propagation of prions.
    1. Biochemistry and Chemical Biology
    2. Genetics and Genomics

    Therapeutic genetic variation revealed in diverse Hsp104 homologs

    Zachary M March et al.
    Exploring natural Hsp104 variation reveals unexpected tuning of a passive activity that inhibits aggregation of specific substrates to selectively counter TDP-43 or alpha-synuclein proteotoxicity connected to neurodegenerative disease.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure of Vps4 with circular peptides and implications for translocation of two polypeptide chains by AAA+ ATPases

    Han Han et al.
    Structural and biochemical studies indicate that AAA+ ATPase employ a general mechanism to translocate a variety of substrates, including extended polypeptides, hairpins, crosslinked chains, and chains conjugated to other molecules.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Structures of TorsinA and its disease-mutant complexed with an activator reveal the molecular basis for primary dystonia

    F Esra Demircioglu et al.
    High resolution structures of the essential human AAA+ ATPase TorsinA and its disease mutant in complex with an activator reveal details of the interaction that will guide drug design and further functional characterization.
    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. Biochemistry and Chemical Biology

    Adenosine diphosphate restricts the protein remodeling activity of the Hsp104 chaperone to Hsp70 assisted disaggregation

    Agnieszka Kłosowska et al.
    Hsp70 chaperone provides Hsp104 with high efficiency in disaggregation and specificity towards aggregated substrates at the, otherwise limiting, cellular concentrations of adenine nucleotides.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    PGAM5 promotes lasting FoxO activation after developmental mitochondrial stress and extends lifespan in Drosophila

    Martin Borch Jensen et al.
    A signaling pathway involving PGAM5, ASK1 and JNK induces persistent FoxO activation, chaperone expression and lifespan extension following developmental mitochondrial stress, which can be blocked by mTOR signaling through GCN-2.
    1. Biochemistry and Chemical Biology

    Evolution of an intricate J-protein network driving protein disaggregation in eukaryotes

    Nadinath B Nillegoda et al.
    The emergence of complementary electrostatic potentials after the prokaryotic-to-eukaryotic split drives physical and functional cooperation between canonical class A and class B J-proteins to boost protein disaggregation.

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