589 results found
    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. Cell Biology

    Cytoplasmic protein misfolding titrates Hsp70 to activate nuclear Hsf1

    Anna E Masser, Wenjing Kang ... Claes Andréasson
    Hsp70 restricts DNA binding activity of Hsf1 to control the width and amplitude of the heat-shock regulon.
    1. Biochemistry and Chemical Biology

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

    Agnieszka Kłosowska, Tomasz Chamera, Krzysztof Liberek
    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

    Hsf1 and the molecular chaperone Hsp90 support a ‘rewiring stress response’ leading to an adaptive cell size increase in chronic stress

    Samarpan Maiti, Kaushik Bhattacharya ... Didier Picard
    Human cells adapt to chronic mild stresses, such as slightly elevated temperature, by getting larger in a process that couples increased translation to increased cell size in an Hsp90-dependent manner.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Modeling Hsp70/Hsp40 interaction by multi-scale molecular simulations and coevolutionary sequence analysis

    Duccio Malinverni, Alfredo Jost Lopez ... Alessandro Barducci
    Integration of complementary computational approaches reveals an evolutionarily conserved interaction interface between molecular chaperones Hsp70 and Hsp40, rationalizing previous observations.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Comprehensive fitness maps of Hsp90 show widespread environmental dependence

    Julia M Flynn, Ammeret Rossouw ... Daniel NA Bolon
    Environmental conditions strongly impact the fitness effects of Hsp90, resulting in the selection of Hsp90 sequences in nature that are robust to a variety of stressful conditions.
    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. Structural Biology and Molecular Biophysics

    The known unknowns of the Hsp90 chaperone

    Laura-Marie Silbermann, Benjamin Vermeer ... Katarzyna Tych
    An exploration of the unanswered questions in how the molecular chaperone Hsp90 supports protein homeostasis, and how single-molecule techniques could drive future breakthroughs in answering them.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    Hsf1 and Hsp70 constitute a two-component feedback loop that regulates the yeast heat shock response

    Joanna Krakowiak, Xu Zheng ... David Pincus
    Dynamic regulation of the heat shock response depends on a negative feedback loop in which Hsf1 activates expression of Hsp70 and Hsp70 specifically and directly represses Hsf1 transactivation.
    1. Computational and Systems Biology
    2. Genetics and Genomics

    Hsp70-associated chaperones have a critical role in buffering protein production costs

    Zoltán Farkas, Dorottya Kalapis ... Csaba Pál
    Protein biosynthesis and protein quality control jointly determine protein production costs.

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