1,860 results found
    1. Cell Biology
    2. Human Biology and Medicine

    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. 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

    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
    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. 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.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The serine protease hepsin mediates urinary secretion and polymerisation of Zona Pellucida domain protein uromodulin

    Martina Brunati et al.
    Hepsin is the first protease identified to modulate specific cleavage and secretion of a Zona Pellucida domain protein, uromodulin.
    1. Microbiology and Infectious Disease

    A novel central nervous system-penetrating protease inhibitor overcomes human immunodeficiency virus 1 resistance with unprecedented aM to pM potency

    Manabu Aoki et al.
    GRL-142 is an HIV protease inhibitor with a unique structure and atto-to-picomolar potency against a wide range of HIV strains.
    1. Cell Biology

    Paradoxical resistance of multiple myeloma to proteasome inhibitors by decreased levels of 19S proteasomal subunits

    Diego Acosta-Alvear et al.
    The nodes of the cytosolic proteostasis network can control sensitivity to proteasome inhibitors and decreased levels of the 19S proteasomal regulator can lead to increased resistance to inhibitors.
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    Proteasome dysfunction triggers activation of SKN-1A/Nrf1 by the aspartic protease DDI-1

    Nicolas J Lehrbach, Gary Ruvkun
    Post-translational processing of the SKN-1A/Nrf1 transcription factor regulates proteasome expression.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Phosphorylation and activation of ubiquitin-specific protease-14 by Akt regulates the ubiquitin-proteasome system

    Daichao Xu et al.
    Akt can regulate the ubiquitin-proteasome system by mediating phosphorylation and activation of USP14, which may have implications in the control of global proteostasis by growth factors and in tumorigenesis.

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