544 results found
    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. Evolutionary Biology

    High potency of sequential therapy with only β-lactam antibiotics

    Aditi Batra et al.
    Sequential therapy with only β-lactam antibiotics achieves surprisingly high potency by exploiting both low rates of spontaneous resistance emergence and low rates of spontaneous cross-resistance among the drugs in sequence.
    1. Microbiology and Infectious Disease

    Efficacy of β-lactam/β-lactamase inhibitor combination is linked to WhiB4-mediated changes in redox physiology of Mycobacterium tuberculosis

    Saurabh Mishra et al.
    Intrinsic tolerance of Mycobacterium tuberculosis toward the world's most successful antibacterials, β-lactams, is dependent on cytoplasmic redox potential and an intracellular redox-sensor WhiB4.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    The roles of history, chance, and natural selection in the evolution of antibiotic resistance

    Alfonso Santos-Lopez et al.
    Selection imposed by antibiotics may dominate evolutionary forces acting on opportunistic pathogens like Acinetobacter baumannii, yet chance effects and a prior history in biofilm may constrain resistance and impose collateral sensitivities.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    Comprehensive exploration of the translocation, stability and substrate recognition requirements in VIM-2 lactamase

    John Z Chen et al.
    Comprehensive mutational characterisation of VIM-2 metallo-beta-lactamase deciphered the residues responsible for key functional behavior, including translocation, stability, substrate recognition and catalysis.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    β-hydroxybutyrate accumulates in the rat heart during low-flow ischaemia with implications for functional recovery

    Ross T Lindsay et al.
    β-Hydroxybutyrate accumulates in the perfused rat heart during ischaemia, driven by flux through both HMGCS and SCOT, with implications for functional recovery.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    The role of interspecies recombination in the evolution of antibiotic-resistant pneumococci

    Joshua C D'Aeth et al.
    Selection by national-level antibiotic consumption and vaccination trends drives atypical recombinations, frequently resulting in interspecies sequence exchange at many sites across a bacterial species’ chromosome.
    1. Biochemistry and Chemical Biology

    Real-time monitoring of peptidoglycan synthesis by membrane-reconstituted penicillin-binding proteins

    Víctor M Hernández-Rocamora et al.
    The synthesis of bacterial cell wall peptidoglycan was reconstituted in lipid bilayers and detected by a novel Förster resonance energy transfer real-time assay.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Evolutionary stability of collateral sensitivity to antibiotics in the model pathogen Pseudomonas aeruginosa

    Camilo Barbosa et al.
    Evolutionary trade-offs enhance efficacy of antibiotic therapy by constraining bacterial adaptation in dependence of drug order and trade-off effect size.
    1. Microbiology and Infectious Disease

    Plasticity of Escherichia coli cell wall metabolism promotes fitness and antibiotic resistance across environmental conditions

    Elizabeth A Mueller et al.
    Environmental specialization of bacterial cell wall synthases influences intrinsic resistance to cell wall active antibiotics.

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