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Table of Contents

March 2021; Volume 203,Issue 6

Spotlight

  • Free
    Articles of Significant Interest in This Issue
    Spotlight
    Articles of Significant Interest in This Issue

Minireview

  • More than a Feeling: Microscopy Approaches to Understanding Surface-Sensing Mechanisms
    Minireview
    More than a Feeling: Microscopy Approaches to Understanding Surface-Sensing Mechanisms

    The mechanisms by which bacteria sense and respond to surface attachment have long been a mystery. Our understanding of the structure and dynamics of bacterial appendages, notably type IV pili (T4P), provided new insights into the potential ways that bacteria sense surfaces. T4P are ubiquitous, retractable hair-like adhesins that until recently, due to their nanoscale size, were difficult to image in the absence of fixation. This review...

    Katherine J. Graham, Lori L. Burrows

Research Articles

  • Open Access
    Measurable Genomic Changes in <span class="named-content genus-species" id="named-content-1">Mycobacterium avium</span> subsp. <em>hominissuis</em> after Long-Term Adaptation in <span class="named-content genus-species" id="named-content-2">Acanthamoeba lenticulata</span> and Reduced Persistence in Macrophages
    Research Article
    Measurable Genomic Changes in Mycobacterium avium subsp. hominissuis after Long-Term Adaptation in Acanthamoeba lenticulata and Reduced Persistence in Macrophages

    Short-term interaction between Acanthamoeba and M. avium has been demonstrated to increase infectivity in human and murine models of infection, establishing the paradigm that amoebae “train” M. avium in the environment by selecting for phenotypes capable of enduring in human cells. We...

    Nabeeh A. Hasan, Grant J. Norton, Ravleen Virdi, L. Elaine Epperson, Charmie K. Vang, Brandon Hellbusch, Xiyuan Bai, Edward D. Chan, Michael Strong, Jennifer R. Honda
  • The Transcription Regulator and c-di-GMP Phosphodiesterase PdeL Represses Motility in <em>Escherichia coli</em>
    Research Article
    The Transcription Regulator and c-di-GMP Phosphodiesterase PdeL Represses Motility in Escherichia coli

    Bacteria adopt different lifestyles depending on their environment and physiological conditions. In Escherichia coli and other enteric bacteria, the transition between the motile and the sessile states is controlled at multiple levels from the regulation of gene expression to the modulation of various processes by the second messenger c-di-GMP as a signaling molecule...

    Cihan Yilmaz, Aathmaja Anandhi Rangarajan, Karin Schnetz
  • Protein Dosage of the <em>lldPRD</em> Operon Is Correlated with RNase E-Dependent mRNA Processing
    Research Article
    Protein Dosage of the lldPRD Operon Is Correlated with RNase E-Dependent mRNA Processing

    Adjustment of gene expression is critical for proper cell function. In the case of polycistronic transcripts, posttranscriptional regulatory mechanisms can be used to fine-tune the expression of individual cistrons.

    Lidia E. Angel-Lerma, Enrique Merino, Ohsuk Kwon, Liliana Medina-Aparicio, Ismael Hernández-Lucas, Adrián F. Alvarez, Dimitris Georgellis
  • Polysaccharide Copolymerase WzzB/WzzE Chimeras Reveal that the Transmembrane 2 Region of WzzB Is Important for Interaction with WzyB
    Research Article
    Polysaccharide Copolymerase WzzB/WzzE Chimeras Reveal that the Transmembrane 2 Region of WzzB Is Important for Interaction with WzyB

    Bacteria synthesize complex polysaccharide chains at a controlled number of repeating units; this has wide implications for a range of bacterial activities involved in virulence. Examples of complex polysaccharide chains include the Oag component of lipopolysaccharide and the ECA; both of these examples are predominantly synthesized by their own independent Wzy-dependent pathway.

    Vincenzo Leo, Elizabeth Tran, Renato Morona
  • The Conserved Translation Factor LepA Is Required for Optimal Synthesis of a Porin Family in <span class="named-content genus-species" id="named-content-1">Mycobacterium smegmatis</span>
    Research Article | Spotlight
    The Conserved Translation Factor LepA Is Required for Optimal Synthesis of a Porin Family in Mycobacterium smegmatis

    The mycobacterial cell wall is a promising target for new antibiotics due to the abundance of important membrane-associated proteins. Defining mechanisms of synthesis of the membrane proteome will be critical to uncovering and validating drug targets.

    Skye R. S. Fishbein, Francesca G. Tomasi, Ian D. Wolf, Charles L. Dulberger, Albert Wang, Hasmik Keshishian, Luke Wallace, Steven A. Carr, Thomas R. Ioerger, E. Hesper Rego, Eric J. Rubin
  • Lipopolysaccharide Transport Involves Long-Range Coupling between Cytoplasmic and Periplasmic Domains of the LptB<sub>2</sub>FGC Extractor
    Research Article | Spotlight
    Lipopolysaccharide Transport Involves Long-Range Coupling between Cytoplasmic and Periplasmic Domains of the LptB2FGC Extractor

    Gram-negative bacteria are intrinsically resistant to many antibiotics due to the presence of lipopolysaccharide (LPS) at their cell surface. LPS is transported from its site of synthesis at the inner membrane to the outer membrane by the Lpt machine.

    Emily A. Lundstedt, Brent W. Simpson, Natividad Ruiz
  • Genome Copy Number Regulates Inclusion Expansion, Septation, and Infectious Developmental Form Conversion in <span class="named-content genus-species" id="named-content-1">Chlamydia trachomatis</span>
    Research Article
    Genome Copy Number Regulates Inclusion Expansion, Septation, and Infectious Developmental Form Conversion in Chlamydia trachomatis
    Julie A. Brothwell, Mary Brockett, Arkaprabha Banerjee, Barry D. Stein, David E. Nelson, George W. Liechti
  • Defects in the First Step of Lipoprotein Maturation Underlie the Synthetic Lethality of <span class="named-content genus-species" id="named-content-1">Escherichia coli</span> Lacking the Inner Membrane Proteins YciB and DcrB
    Research Article
    Defects in the First Step of Lipoprotein Maturation Underlie the Synthetic Lethality of Escherichia coli Lacking the Inner Membrane Proteins YciB and DcrB

    A distinguishing feature of Gram-negative bacteria is their double-membraned cell envelope, which presents a formidable barrier against environmental stress. In E. coli, more than a quarter of the cellular proteins reside at the inner membrane, but about a third of these proteins are functionally unassigned or their function is incompletely understood.

    ...
    Aaron Mychack, Anuradha Janakiraman
  • Genetic Analysis of the Role of the Conserved Inner Membrane Protein CvpA in Enterohemorrhagic <em>Escherichia coli</em> Resistance to Deoxycholate
    Research Article
    Genetic Analysis of the Role of the Conserved Inner Membrane Protein CvpA in Enterohemorrhagic Escherichia coli Resistance to Deoxycholate

    Several enteric pathogens, including enterohemorrhagic E. coli (EHEC) strains, require CvpA to robustly colonize the intestine. This inner membrane protein is also important for secretion of a colicin and for EHEC resistance to the bile salt deoxycholate (DOC), but its function is unknown.

    Alyson R. Warr, Rachel T. Giorgio, Matthew K. Waldor

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Journal of Bacteriology: 203 (6)

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volume 203, issue 6
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  • Lag Phase Is a Dynamic, Organized, Adaptive, and Evolvable Period That Prepares Bacteria for Cell Division
  • Understanding the Genetic Code
  • Light Modulates the Physiology of Nonphototrophic Actinobacteria
  • Transposon Insertion Sequencing in a Clinical Isolate of Legionella pneumophila Identifies Essential Genes and Determinants of Natural Transformation
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