743 results found
    1. Structural Biology and Molecular Biophysics

    Oligomerization of a molecular chaperone modulates its activity

    Tomohide Saio et al.
    A combined NMR and kinetic study demonstrates how the dynamic transition of a molecular chaperone between different oligomerization states can modulate its activity by altering the binding kinetics and energetics of non-native proteins.
    1. Structural Biology and Molecular Biophysics

    Hsp40s play complementary roles in the prevention of tau amyloid formation

    Rose Irwin et al.
    Chaperones from different families and classes synergistically target different stages of tau aggregation, thus preventing pathological amyloid formation.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Efficient conversion of chemical energy into mechanical work by Hsp70 chaperones

    Salvatore Assenza et al.
    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. 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 et al.
    Cytosolic and organellar Hsp90s from higher eukaryotes have evolved a variable, and environmentally responsive N-terminal extension to regulate their activity.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Redox signaling via the molecular chaperone BiP protects cells against endoplasmic reticulum-derived oxidative stress

    Jie Wang et al.
    Direct modification by endogenous peroxide of a conserved cysteine in the molecular chaperone BiP decouples its ATPase and peptide-binding activities, allowing for enhanced polypeptide holdase activity during oxidative stress.
    1. Biochemistry and Chemical Biology

    HspB8 prevents aberrant phase transitions of FUS by chaperoning its folded RNA-binding domain

    Edgar E Boczek et al.
    Quantitative time-resolved crosslinking mass spectrometry is developed to monitor protein interactions and dynamics inside molecular condensates and used to identify misfolding of the RNA-binding domain of FUS as a key driver of condensate-aging.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    AMPylation matches BiP activity to client protein load in the endoplasmic reticulum

    Steffen Preissler et al.
    Attaching a molecule of adenosine mono-phosphate (AMP) to the BiP protein at threonine 518 regulates its chaperone activity in the endoplasmic reticulum.
    1. Biochemistry and Chemical Biology
    2. Immunology and Inflammation

    A loop structure allows TAPBPR to exert its dual function as MHC I chaperone and peptide editor

    Lina Sagert et al.
    A dedicated structural element facilitates chaperone and antigenic peptide selector function of TAP-associated glycoprotein, a major quality assurance auditor in adaptive immunity.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Reconstitution of bacterial autotransporter assembly using purified components

    Giselle Roman-Hernandez et al.
    A complex that catalyzes the membrane integration of β barrel proteins and a molecular chaperone promote the complete assembly of a bacterial virulence factor in vitro.
    1. Cell Biology

    Unique integrated stress response sensors regulate cancer cell susceptibility when Hsp70 activity is compromised

    Sara Sannino et al.
    Unique integrate stress response sensors differentially trigger pro-survival versus pro-apoptotic responses in cells confronted with Hsp70 inhibitor-associated proteotoxic challenges.

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