3,814 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Heterogeneity of proteome dynamics between connective tissue phases of adult tendon

    Howard Choi et al.
    Metabolic labelling reveals complex proteome dynamics in tendon, with faster turnover of proteins in the glycoprotein-rich interfascicular matrix compared to the collagen-rich fascicular matrix.
    1. Structural Biology and Molecular Biophysics

    Atomic structure of the 26S proteasome lid reveals the mechanism of deubiquitinase inhibition

    Corey M Dambacher et al.
    Within the isolated lid sub-complex of the proteasome, a finely tuned network of interactions maintains the deubiquitinase in an inhibited conformation; dramatic rearrangements of the lid subunits upon incorporation into the holoenzyme lead to the deubiquitinase’s activation.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    A widespread family of serine/threonine protein phosphatases shares a common regulatory switch with proteasomal proteases

    Niels Bradshaw et al.
    Structures of active and inactive conformations of a PP2C family phosphatase reveal a conserved switch that controls enzymatic activity and point to an unexpected relationship between phosphatases and proteasomal proteases.
    1. Cancer Biology

    Renal medullary carcinomas depend upon SMARCB1 loss and are sensitive to proteasome inhibition

    Andrew L Hong et al.
    Faithful models of RMC require SMARCB1 loss for survival, and genetic and small-molecule screens identify inhibition of the ubiquitin-proteasome system (UPS) as a potential therapeutic approach for SMARCB1 deficient cancers.
    1. Biochemistry and Chemical Biology

    Insights into AMS/PCAT transporters from biochemical and structural characterization of a double Glycine motif protease

    Silvia C Bobeica et al.
    Structural and biochemical characterization of the protease domain of an ABC transporter demonstrates the basis for recognition of substrate leader peptides.
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    Diverse viral proteases activate the NLRP1 inflammasome

    Brian V Tsu et al.
    Proteases from diverse viruses, the first described pathogen-encoded activators of human NLRP1, cleave NLRP1 at a sequence that mimics the viral polyprotein, resulting in inflammasome activation and pro-inflammatory cytokine release.
    1. Genetics and Genomics

    Suppressing proteasome mediated processing of topoisomerase II DNA-protein complexes preserves genome integrity

    Nicholas Sciascia et al.
    Analysis of genome integrity in primary murine B-cells reveals how depleting 26S proteasome activity enhanced cell survival following treatment with topoisomerase poisons.
    1. Cell Biology

    Compromising the 19S proteasome complex protects cells from reduced flux through the proteasome

    Peter Tsvetkov et al.
    Reducing the expression of 19S subunits shifts the ratio of 20S/26S proteasome complexes and provides a powerful survival advantage in the face of lethal proteasome inhibition.
    1. Biochemistry and Chemical Biology

    Membrane immersion allows rhomboid proteases to achieve specificity by reading transmembrane segment dynamics

    Syed M Moin, Sinisa Urban
    Intramembrane proteases identify target proteins in a different way from other proteases.
    1. Biochemistry and Chemical Biology

    The aspartyl protease DDI2 activates Nrf1 to compensate for proteasome dysfunction

    Shun Koizumi et al.
    Peptidase activity of DDI2 is required to activate Nrf1 in order to enable proteasome recovery in response to proteasome inhibition.

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