30 results found
    1. Biochemistry and Chemical Biology

    Evolution of (p)ppGpp-HPRT regulation through diversification of an allosteric oligomeric interaction

    Brent W Anderson et al.
    The signaling ligand (p)ppGpp regulates the enzyme HPRT across species by binding to a novel class of conserved motif, yet its specificity is allosterically altered through evolution of enzyme oligomerization.
    1. Microbiology and Infectious Disease

    Factors essential for L,D-transpeptidase-mediated peptidoglycan cross-linking and β-lactam resistance in Escherichia coli

    Jean-Emmanuel Hugonnet et al.
    Production of the L,D-transpeptidase YcbB and elevated synthesis of the (p)ppGpp alarmone reveals a new mode of peptidoglycan polymerization that bypasses the D,D-transpeptidase activity of PBPs and leads to broad-spectrum β-lactam resistance in Escherichia coli.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Bacterial cell cycle control by citrate synthase independent of enzymatic activity

    Matthieu Bergé et al.
    A key enzyme of central energy metabolism, citrate synthase, regulates bacterial cell cycle progression at a very specific stage (S-phase) and independently of its enzymatic activity.
    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. Microbiology and Infectious Disease

    Density-dependent resistance protects Legionella pneumophila from its own antimicrobial metabolite, HGA

    Tera C Levin et al.
    Legionella pneumophila can be inhibited by its own antimicrobial, HGA (homogentisic acid), but its density-dependent resistance to HGA restricts the potential for self-harm.
    1. Microbiology and Infectious Disease

    The Mla pathway in Acinetobacter baumannii has no demonstrable role in anterograde lipid transport

    Matthew J Powers et al.
    An outer membrane vesicle pulse-chase assay demonstrates that the Acinetobacter baumannii Mla system is a retrograde lipid transporter.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Structural ordering of the Plasmodium berghei circumsporozoite protein repeats by inhibitory antibody 3D11

    Iga Kucharska et al.
    A comprehensive structural analysis of inhibitory murine antibody 3D11 binding to Plasmodium berghei circumsporozoite protein reveals common mechanisms of antibody evolution in mammals against Plasmodium parasites.
    1. Microbiology and Infectious Disease

    Cell differentiation defines acute and chronic infection cell types in Staphylococcus aureus

    Juan-Carlos García-Betancur et al.
    During Staphylococcus aureus infections, bacterial cells bifurcate into distinct, specialized cell types that localize physically in different colonization tissues to simultaneously generate different infection types.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Ras-like domain in the light intermediate chain bridges the dynein motor to a cargo-binding region

    Courtney M Schroeder et al.
    The dynein light intermediate chain is a member of the G protein superfamily and links the motor to several intracellular cargo adaptors.
    1. Computational and Systems Biology

    Essential metabolism for a minimal cell

    Marian Breuer et al.
    A near-complete flux balance analysis model of a minimal cell demonstrates the high essentiality of its metabolic genes, agrees well with experimental essentiality data and suggests some further gene removals.

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