60 results found
    1. Biochemistry and Chemical Biology

    Mitochondrial ClpX activates an essential biosynthetic enzyme through partial unfolding

    Julia R Kardon et al.
    The mitochondrial protein unfoldase ClpX activates the first enzyme in heme biosynthesis, ALAS, by targeted unfolding that gates access of cofactor to the ALAS active site.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular basis for catabolism of the abundant metabolite trans-4-hydroxy-L-proline by a microbial glycyl radical enzyme

    Lindsey RF Backman et al.
    The common post-translational modification trans-4-hydroxy-L-proline is reversed by gut microbes with the help of hydroxyproline dehydratase (HypD), an enzyme that performs a radical chemical mechanism.
    1. Biochemistry and Chemical Biology

    Fatal amyloid formation in a patient’s antibody light chain is caused by a single point mutation

    Pamina Kazman et al.
    Identifying the patient-specific mutation that shifted the antibody light chain to the deadly fibrillar species provides new insight in the molecular pathogenesis of AL amyloidosis.
    1. Chromosomes and Gene Expression
    2. Microbiology and Infectious Disease

    ParB spreading on DNA requires cytidine triphosphate in vitro

    Adam SB Jalal et al.
    A biochemical reconstitution shows that the accumulation of Caulobacter crescentus ParB on DNA requires cytidine triphosphate and a closed DNA substrate in vitro.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    A widely distributed metalloenzyme class enables gut microbial metabolism of host- and diet-derived catechols

    Vayu Maini Rekdal et al.
    A previously unrecognized group of metalloenzymes enables human gut microbes to metabolize dietary molecules and neurotransmitters and likely mediates interactions and metabolism among environmental microorganisms.
    1. Cell Biology

    Unstructured regions in IRE1α specify BiP-mediated destabilisation of the luminal domain dimer and repression of the UPR

    Niko Amin-Wetzel et al.
    Client protein-driven reversal of endoplasmic reticulum chaperone (BiP) mediated-repression is revealed as a principal component of the regulation of the unfolded protein response transducer IRE1 in cells.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Two new polymorphic structures of human full-length alpha-synuclein fibrils solved by cryo-electron microscopy

    Ricardo Guerrero-Ferreira et al.
    Two new polymorphic structures of recombinant human alpha-synuclein fibrils show striking differences to previous structures, while familial PD mutation sites remain crucial for protofilament interaction and fibril stability.
    1. Structural Biology and Molecular Biophysics

    De novo design of a homo-trimeric amantadine-binding protein

    Jooyoung Park et al.
    The first successful de novo design of a homo-trimeric protein that binds a C3 symmetric small molecule larger than a metal ion is an advance for computational protein design.
    1. Cell Biology
    2. Genetics and Genomics

    The ribosomal P-stalk couples amino acid starvation to GCN2 activation in mammalian cells

    Heather P Harding et al.
    Genetic lesions that compromise the ribosome P-stalk implicate direct signalling from the ribosome to the translation initiation factor eIF2 kinase GCN2 in the cellular response to amino acid starvation.
    1. Chromosomes and Gene Expression

    Crl activates transcription by stabilizing active conformation of the master stress transcription initiation factor

    Juncao Xu et al.
    The cryo-EM structure of Escherichia coli Crl–TAC reveals the mechanism of DNA-contact-independent transcription activation.

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