102 results found
    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

    Skd3 (human ClpB) is a potent mitochondrial protein disaggregase that is inactivated by 3-methylglutaconic aciduria-linked mutations

    Ryan R Cupo, James Shorter
    Skd3 (human ClpB) is a potent ATP-dependent mitochondrial protein disaggregase that is activated by the rhomboid protease, PARL, and inactivated by MGCA7-linked mutations.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Promiscuous interactions and protein disaggregases determine the material state of stress-inducible RNP granules

    Sonja Kroschwald et al.
    A comparison in yeast and human cells reveals a remarkable variability in the properties of RNP granules and highlights a key role for protein disaggregation machines in regulating RNP granule assembly.
    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. Epidemiology and Global Health

    The global burden of yellow fever

    Katy AM Gaythorpe et al.
    Yellow fever, a potentially deadly viral hemorrhagic fever, causes up to 82,000 deaths annually worldwide, and mass vaccination activities have reduced the burden by 47% in Africa.
    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. 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. Evolutionary Biology
    2. Genetics and Genomics

    Predicted glycosyltransferases promote development and prevent spurious cell clumping in the choanoflagellate S. rosetta

    Laura A Wetzel et al.
    A genetic screen reveals that two predicted glycosyltransferases promote rosette development and prevent cell clumping in one of the closest living relatives of animals, the choanoflagellate S. rosetta.
    1. Cell Biology
    2. Developmental Biology

    Protein aggregates are associated with replicative aging without compromising protein quality control

    Juha Saarikangas, Yves Barral
    The aging lineage of budding yeast is differentiated by an early-appearing protein deposit that promotes protein quality control.
    1. Cell Biology

    Spatial quality control bypasses cell-based limitations on proteostasis to promote prion curing

    Courtney L Klaips et al.
    Cell division imposes a limit on proteostasis capacity by reducing chaperone accumulation, but chaperone-substrate interactions reverse these events to allow clearance of even chronically misfolded protein amyloids.

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