2,232 results found
    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. 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. 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. Developmental Biology

    Ripply2 recruits proteasome complex for Tbx6 degradation to define segment border during murine somitogenesis

    Wei Zhao et al.
    Inducing presomitic mesoderm (PSM)-fated ES cells clarified that Ripply2 directly interacts with Tbx6 and degrades Tbx6 in proteasome-ubiquitin pathway by recruiting the 26S proteasome, which is a PSM-specific event to define the segment border during mouse somitogenesis.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    N-glycosylation in the protease domain of trypsin-like serine proteases mediates calnexin-assisted protein folding

    Hao Wang et al.
    N-glycans commonly present in the protease domains are required for calnexin-mediated protein folding and intracellular trafficking.

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