629 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insights into mRNA reading frame regulation by tRNA modification and slippery codon–anticodon pairing

    Eric D Hoffer et al.
    Chemical modifications near the tRNA anticodon and specific mRNA–tRNA pairs combine to control the ribosomal three-nucleotide mRNA reading frame, essential for the sequential addition of amino acids into polypeptide chains.
    1. Biochemistry and Chemical Biology

    The mechanism of error induction by the antibiotic viomycin provides insight into the fidelity mechanism of translation

    Mikael Holm et al.
    The antibiotic viomycin induces errors during initial codon selection by the ribosome by locking the monitoring bases in their active conformation.
    1. Structural Biology and Molecular Biophysics

    Ribosome•RelA structures reveal the mechanism of stringent response activation

    Anna B Loveland et al.
    Cryo-EM structures of 70S•RelA ribosome complexes reveal how cognate deacyl-tRNA activates RelA.
    1. Epidemiology and Global Health
    2. Genetics and Genomics

    Characterisation of the opposing effects of G6PD deficiency on cerebral malaria and severe malarial anaemia

    Geraldine M Clarke et al.
    Increasing levels of glucose-6-phosphate dehydrogenase deficiency are associated with decreasing risk of cerebral malaria, but with increased risk of severe malarial anaemia.
    1. Biochemistry and Chemical Biology

    A discriminator code–based DTD surveillance ensures faithful glycine delivery for protein biosynthesis in bacteria

    Santosh Kumar Kuncha et al.
    Using bioinformatic and biochemical approaches, the study has explained the discriminator base anomaly in bacterial tRNA(Gly) through identification of the key determinant of DTD specificity.
    1. Microbiology and Infectious Disease

    Infectious polymorphic toxins delivered by outer membrane exchange discriminate kin in myxobacteria

    Christopher N Vassallo et al.
    Serial cell-to-cell transfer of lipoprotein toxins by outer membrane exchange provides a potent platform for kin discrimination in Myxococcus xanthus.
    1. Structural Biology and Molecular Biophysics

    Specific structural elements of the T-box riboswitch drive the two-step binding of the tRNA ligand

    Jiacheng Zhang et al.
    The glycine T-box riboswitch recognizes tRNAgly and senses its aminoacylation state by first interacting with the anticodon region and subsequently probing the 3' end of the ligand using both specific structural elements and conformational dynamics.
    1. Structural Biology and Molecular Biophysics

    Sequence co-evolution gives 3D contacts and structures of protein complexes

    Thomas A Hopf et al.
    Interactions in protein complexes can be predicted from evolutionary information from genomic sequences.
    1. Neuroscience

    Single-cell transcriptomic evidence for dense intracortical neuropeptide networks

    Stephen J Smith et al.
    Single-cell mRNA sequencing data from mouse neocortex expose evidence for peptidergic neuromodulation networks that locally interconnect every cortical neuron.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Organisms with alternative genetic codes resolve unassigned codons via mistranslation and ribosomal rescue

    Natalie Jing Ma et al.
    Cells resolve unassigned codons with near-cognate suppression, frameshifting, and ribosomal rescue mechanisms, demonstrating that unassigned codons are permissible in both natural and engineered genetic codes as barriers to horizontal gene transfer.

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