140 results found
    1. Cell Biology

    Distinct regulatory ribosomal ubiquitylation events are reversible and hierarchically organized

    Danielle M Garshott et al.
    A hierarchical relationship among highly conserved regulatory ribosomal ubiquitylation events and the presence of antagonistic deubiquitylating enzymes suggests a dynamic ubiquitin code impacts ribosome-associated activities.
    1. Cell Biology

    USP16 counteracts mono-ubiquitination of RPS27a and promotes maturation of the 40S ribosomal subunit

    Christian Montellese et al.
    The deubiquitinase USP16 is associated with cytoplasmic precursors of 40S ribosomal subunits and promotes their final maturation by removal of trans-monoubiquitin from RPS27a.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The Rqc2/Tae2 subunit of the ribosome-associated quality control (RQC) complex marks ribosome-stalled nascent polypeptide chains for aggregation

    Ryo Yonashiro et al.
    Rqc2-mediated modification of ribosome-stalled nascent chains with "CAT tails" promotes formation of insoluble aggregates suggesting that proteins can become specifically marked for aggregation.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    In vitro analysis of RQC activities provides insights into the mechanism and function of CAT tailing

    Beatriz A Osuna et al.
    Yeast extracts recapitulate a quality-control pathway dedicated to rescuing stalled ribosomes, providing unexpected insights into a noncanonical elongation reaction and the fate of incompletely synthesized proteins.
    1. Chromosomes and Gene Expression

    Unfolded Protein Response: Silence without stress

    David J Young, Nicholas R Guydosh
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    1. Cancer Biology

    MARCH5 mediates NOXA-dependent MCL1 degradation driven by kinase inhibitors and integrated stress response activation

    Seiji Arai et al.
    MARCH5 mediates a pathway driving MCL1 degradation in response to cellular stress, which sensitizes to BH3 mimetic drugs targeting BCLXL and provides a broadly effective therapeutic strategy for solid tumors.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Positively selected modifications in the pore of TbAQP2 allow pentamidine to enter Trypanosoma brucei

    Ali H Alghamdi et al.
    Study of TbAQP2 adaptations and substrate interactions shows how this aquaglyceroporin enables cellular entry of large antimicrobial agents in Trypanosoma brucei.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The autophagy adaptor NDP52 and the FIP200 coiled-coil allosterically activate ULK1 complex membrane recruitment

    Xiaoshan Shi et al.
    Hydrogen-deuterium exchange, electron microscopy, and vesicle reconstitution show how binding of the autophagy adaptor NDP52 to the FIP200 subunit of the ULK1 complex triggers membrane binding in autophagy.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Multisite dependency of an E3 ligase controls monoubiquitylation-dependent cell fate decisions

    Achim Werner et al.
    Simultaneous phosphorylation of multiple substrate motifs drives switch-like target recognition and monoubiquitylation by an E3 ligase during metazoan development.
    1. Cancer Biology

    SPIN1 promotes tumorigenesis by blocking the uL18 (universal large ribosomal subunit protein 18)-MDM2-p53 pathway in human cancer

    Ziling Fang et al.
    SPIN1, a nucleolar protein, plays an oncogenic role by suppressing the tumor suppressor p53's function via regulation of the uL18-MDM2-p53 pathway.

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