19 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
    2. Structural Biology and Molecular Biophysics

    Structure of the Helicobacter pylori Cag type IV secretion system

    Jeong Min Chung et al.
    The Helicobacter pylori Cag T4SS has unique structural features, including unexpected symmetry mismatch between sub-complexes, with implications for protein secretion.
    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

    Bacteria: How Legionella defend their turf

    Elisa D Hughes, Michele S Swanson
    Communities of bacteria that cause Legionnaire’s disease repel other bacteria by secreting an acid called HGA.
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    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    The presence and absence of periplasmic rings in bacterial flagellar motors correlates with stator type

    Mohammed Kaplan et al.
    A correlation between the periplasmic embellishment of the flagellar motor and its stator system type is described, motors with dual H+-dependent stator systems have one periplasmic ring formed by MotY.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Symbiont location, host fitness, and possible coadaptation in a symbiosis between social amoebae and bacteria

    Longfei Shu et al.
    Morphological and fitness defects imposed on amoebae hosts by Burkholderia symbionts demonstrates symbiont species-specific effects and provides evidence of host adaptation to naturally acquired symbionts.
    1. Structural Biology and Molecular Biophysics

    Insights into the ubiquitin transfer cascade catalyzed by the Legionella effector SidC

    David Jon Wasilko et al.
    Structural and biochemical studies reveal the molecular mechanisms for ubiquitin transfer by two unique bacterial ubiquitin E3 ligases.
    1. Cell Biology

    Integrin-based diffusion barrier separates membrane domains enabling the formation of microbiostatic frustrated phagosomes

    Michelle E Maxson et al.
    The diffusional barrier formed between phagocyte integrin and fungal glucans preserves the microbiostatic phagocytic environment generated during the frustrated phagocytosis of Candida albicans hypha.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Site-specific monoubiquitination downregulates Rab5 by disrupting effector binding and guanine nucleotide conversion

    Donghyuk Shin et al.
    With monoubiquitination sites of Rab5 identified and structural and biochemical studies using chemically synthesized ubiquitinated Rab5, Rab5 monoubiquitination is found to downregulate the function of Rab5 in a site-dependent manner.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Chemotactic network responses to live bacteria show independence of phagocytosis from chemoreceptor sensing

    Netra Pal Meena, Alan R Kimmel
    Eukaryotic chemotaxis to live bacteria was quantified at a high throughput level, for the first time, and mechanistically examined for the interrelationship between chemotaxis and phagocytosis.

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