103 results found
    1. Genetics and Genomics
    2. Stem Cells and Regenerative Medicine

    Cell-type diversity and regionalized gene expression in the planarian intestine

    David J Forsthoefel et al.
    Application of laser-capture microdissection to planarian intestinal tissue provides a new tool for analysis of tissue-specific gene expression in flatworms, and a new resource to advance investigations of gastrointestinal regeneration.
    1. Microbiology and Infectious Disease

    Co-evolution within structured bacterial communities results in multiple expansion of CRISPR loci and enhanced immunity

    Nora C Pyenson, Luciano A Marraffini
    Cells must acquire multiple viral spacer sequences to neutralize mutant escaper phages and form colonies during the CRISPR-Cas immune response.
    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

    Defective lytic transglycosylase disrupts cell morphogenesis by hindering cell wall de-O-acetylation in Neisseria meningitidis

    Allison Hillary Williams et al.
    Lytic transglycosylase enhances the activity of its protein partner, and its catalytic domain can be targeted to disrupt cell-wall integrity, protein partner function, and bacterial survival (Neisseria meningitidis) in hosts.
    1. Evolutionary Biology

    Resurrection of a global, metagenomically defined gokushovirus

    Paul C Kirchberger, Howard Ochman
    Isolation of a gokushovirus capable of lysogenizing enterobacteria challenges previous notions about the biology of the most prolific phages within the Microviridae and facilitates experimental study in a model organism.
    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.
    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. Cell Biology
    2. Microbiology and Infectious Disease

    Class-A penicillin binding proteins do not contribute to cell shape but repair cell-wall defects

    Antoine Vigouroux et al.
    Class-A penicillin-binding proteins are dispensable for rod-like cell-shape but essential for mechanical integrity by sensing and repairing cell-wall defects locally, as investigated in the model system 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.

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