12 results found
    1. Structural Biology and Molecular Biophysics

    Structural basis of ribosomal peptide macrocyclization in plants

    Joel Haywood et al.
    The first crystal structure of an active plant asparaginyl endopeptidase reveals a tetrahedral intermediate state in its active site, which may help to explain why these enzymes have been independently recruited to perform peptide macrocyclization.
    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    The transpeptidase PBP2 governs initial localization and activity of the major cell-wall synthesis machinery in E. coli

    Gizem Özbaykal et al.
    For initiation of cell-wall insertion, the cross-linking enzyme PBP2 stably binds to a component of the cell envelope that is different from MreB filaments.
    1. Microbiology and Infectious Disease

    Distinct cytoskeletal proteins define zones of enhanced cell wall synthesis in Helicobacter pylori

    Jennifer A Taylor et al.
    The helical bacterium Helicobacter pylori patterns cell wall synthesis using two distinct cytoskeletal proteins, CcmA and MreB, to achieve its characteristic shape.
    1. Microbiology and Infectious Disease

    Maturing Mycobacterium smegmatis peptidoglycan requires non-canonical crosslinks to maintain shape

    Catherine Baranowski et al.
    Polar elongating mycobacteria (Mycobacterium smegmatis) require specific cell wall chemistries, those catalyzed by targets of critical antibiotics, to maintain rod shape at aging sites of the bacillus.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Peptidoglycan precursor synthesis along the sidewall of pole-growing mycobacteria

    Alam García-Heredia et al.
    Peptidoglycan precursor synthesis occurs in both growing and non-growing regions of the mycobacterial cell surface.
    1. Microbiology and Infectious Disease

    Septal secretion of protein A in Staphylococcus aureus requires SecA and lipoteichoic acid synthesis

    Wenqi Yu et al.
    Surface protein precursors traffic to lipoteichoic acid-rich septal membranes of Staphylococcus aureus for cleavage of their YSIRK-GXXS motif signal peptides and SecA-mediated translocation across the plasma membrane.
    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. Microbiology and Infectious Disease

    Mechanisms of substrate recognition by a typhoid toxin secretion-associated muramidase

    Tobias Geiger et al.
    Biochemical analyses and the crystal structure of TtsA reveal fundamental insight into the mechanisms by which this muramidase recognizes its peptidoglycan substrate to facilitate typhoid toxin secretion.
    1. Microbiology and Infectious Disease

    A mutant Escherichia coli that attaches peptidoglycan to lipopolysaccharide and displays cell wall on its surface

    Marcin Grabowicz et al.
    A single mutation in Escherichia coli connects two essential cell envelope assembly pathways and confers vancomycin resistance by displaying molecular decoys at the cell surface.
    1. Microbiology and Infectious Disease

    RNA polymerase mutations cause cephalosporin resistance in clinical Neisseria gonorrhoeae isolates

    Samantha G Palace et al.
    Ceftriaxone resistance has arisen multiple times in clinical gonococcal populations via previously undescribed RNA polymerase mutations, underscoring the importance of continued surveillance for novel resistance determinants.

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