1,051 results found
    1. Evolutionary Biology

    RNA chaperones buffer deleterious mutations in E. coli

    Marina Rudan, Dominique Schneider ... Anita Krisko
    The overexpression of RNA chaperones, including several DEAD box RNA helicases, enhances the fitness of mutationally compromised E. coli strains.
    1. Structural Biology and Molecular Biophysics

    Conserved conformational selection mechanism of Hsp70 chaperone-substrate interactions

    Ashok Sekhar, Algirdas Velyvis ... Lewis E Kay
    NMR-based flux measurements show that both bacterial and human Hsp70 chaperones interact with helical, as well as sheet substrates predominantly through a conformational selection mechanism.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Efficient conversion of chemical energy into mechanical work by Hsp70 chaperones

    Salvatore Assenza, Alberto Stefano Sassi ... Alessandro Barducci
    A multiscale modeling approach reveals how the energy from ATP hydrolysis is used by Hsp70 chaperones to remodel the conformation of their substrates through a novel force-generating mechanism.
    1. Structural Biology and Molecular Biophysics

    Promiscuous binding by Hsp70 results in conformational heterogeneity and fuzzy chaperone-substrate ensembles

    Rina Rosenzweig, Ashok Sekhar ... Lewis E Kay
    Multiple chaperone binding sites on substrates suggest a mechanism by which the Hsp70 chaperone can circumvent kinetic traps in protein folding.
    1. Cell Biology

    Proteostasis collapse, a hallmark of aging, hinders the chaperone-Start network and arrests cells in G1

    David F Moreno, Kirsten Jenkins ... Martí Aldea
    Cells accumulate damaged proteins during aging and, by compromising the function of chaperones in folding newly synthesized G1 cyclins, proteostasis breakdown inhibits cell-cycle entry and drives yeast cells into senescence.
    1. Biochemistry and Chemical Biology

    Nicotinamide mononucleotide adenylyltransferase uses its NAD+ substrate-binding site to chaperone phosphorylated Tau

    Xiaojuan Ma, Yi Zhu ... Dan Li
    Mechanistic insight into the chaperone-like activity of NMNAT to phosphorylated Tau reveals a connection between NAD+metabolism and Tau homeostasis.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A novel N-terminal extension in mitochondrial TRAP1 serves as a thermal regulator of chaperone activity

    James R Partridge, Laura A Lavery ... David A Agard
    Cytosolic and organellar Hsp90s from higher eukaryotes have evolved a variable, and environmentally responsive N-terminal extension to regulate their activity.
    1. Cell Biology
    2. Computational and Systems Biology

    Dynamic control of Hsf1 during heat shock by a chaperone switch and phosphorylation

    Xu Zheng, Joanna Krakowiak ... David Pincus
    Quantitative dissection of the roles of chaperone binding and phosphorylation in regulating heat shock factor 1 leads to a predictive model of the dynamics of the yeast heat shock response.
    1. Biochemistry and Chemical Biology
    2. Physics of Living Systems

    Hsp70 chaperones are non-equilibrium machines that achieve ultra-affinity by energy consumption

    Paolo De Los Rios, Alessandro Barducci
    ATP consumption enables chaperones to exploit the different kinetic properties of their conformational states to exhibit a non-equilibrium affinity for their substrates that is orders of magnitude higher than its equilibrium value.
    1. Biochemistry and Chemical Biology
    2. Immunology and Inflammation

    The ER folding sensor UGGT1 acts on TAPBPR-chaperoned peptide-free MHC I

    Lina Sagert, Christian Winter ... Robert Tampé
    The endoplasmic reticulum (ER) folding sensor UGGT1 essentially cooperates with the peptide editor TAPBPR to provide quality control of MHC I molecules in the antigen presentation pathway.

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