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  • Home
  • Articles
    • Latest Articles
    • COVID-19 Research and News from ASM Journals
    • mSphere of Influence: Commentaries from Early Career Microbiologists
    • Archive
  • Topics
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    • Host-Microbe Biology
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Latest Articles

  • Mapping the Role of AcrAB-TolC Efflux Pumps in the Evolution of Antibiotic Resistance Reveals Near-MIC Treatments Facilitate Resistance Acquisition
    Research Article | Therapeutics and Prevention
    Mapping the Role of AcrAB-TolC Efflux Pumps in the Evolution of Antibiotic Resistance Reveals Near-MIC Treatments Facilitate Resistance Acquisition

    Combatting the rise of antibiotic resistance is a significant challenge. Efflux pumps are an important contributor to drug resistance; they exist across many cell types and can export numerous classes of antibiotics.

    Ariel M. Langevin, Imane El Meouche, Mary J. Dunlop
    16 Dec 2020
  • Enzymatic Analysis of Yeast Cell Wall-Resident GAPDH and Its Secretion
    Research Article | Molecular Biology and Physiology
    Enzymatic Analysis of Yeast Cell Wall-Resident GAPDH and Its Secretion

    Eukaryotic cells secrete many proteins, including many proteins that do not follow the classical secretion pathway. Among these, the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is unexpectedly found in the walls of yeasts and other fungi and in extracellular space in mammalian cell cultures.

    Michael J. Cohen, Brianne Philippe, Peter N. Lipke
    16 Dec 2020
  • <span class="named-content genus-species" id="named-content-1">Haloferax volcanii</span> Immersed Liquid Biofilms Develop Independently of Known Biofilm Machineries and Exhibit Rapid Honeycomb Pattern Formation
    Research Article | Molecular Biology and Physiology
    Haloferax volcanii Immersed Liquid Biofilms Develop Independently of Known Biofilm Machineries and Exhibit Rapid Honeycomb Pattern Formation

    This first molecular biological study of archaeal immersed liquid biofilms advances our basic biological understanding of the model archaeon Haloferax volcanii. Data gleaned from this study also provide an invaluable foundation for future studies to uncover components required for immersed liquid biofilms in this haloarchaeon and also potentially for liquid biofilm...

    Heather Schiller, Stefan Schulze, Zuha Mutan, Charlotte de Vaulx, Catalina Runcie, Jessica Schwartz, Theopi Rados, Alexandre W. Bisson Filho, Mechthild Pohlschroder
    16 Dec 2020
  • Nasal Tissue Extraction Is Essential for Characterization of the Murine Upper Respiratory Tract Microbiota
    Research Article | Host-Microbe Biology
    Nasal Tissue Extraction Is Essential for Characterization of the Murine Upper Respiratory Tract Microbiota

    The nasal microbiota is composed of species that play a role in the colonization success of pathogens, including Streptococcus pneumoniae and Staphylococcus aureus. Murine models provide the ability to explore disease pathogenesis, but little is known about the natural murine nasal microbiota.

    ...
    L. Patrick Schenck, Joshua J. C. McGrath, Daphnée Lamarche, Martin R. Stämpfli, Dawn M. E. Bowdish, Michael G. Surette
    16 Dec 2020
  • Interactions of the Nipah Virus P, V, and W Proteins across the STAT Family of Transcription Factors
    Research Article | Host-Microbe Biology
    Interactions of the Nipah Virus P, V, and W Proteins across the STAT Family of Transcription Factors

    How Nipah virus (NiV) antagonizes innate immune responses is incompletely understood. The P gene of NiV encodes the P, V, and W proteins.

    Timothy R. Keiffer, Michael J. Ciancanelli, Megan R. Edwards, Christopher F. Basler
    16 Dec 2020
  • Hydrogen Peroxide Production by <span class="named-content genus-species" id="named-content-1">Streptococcus pneumoniae</span> Results in Alpha-hemolysis by Oxidation of Oxy-hemoglobin to Met-hemoglobin
    Observation | Host-Microbe Biology
    Hydrogen Peroxide Production by Streptococcus pneumoniae Results in Alpha-hemolysis by Oxidation of Oxy-hemoglobin to Met-hemoglobin

    There is a misconception that alpha-hemolysis observed on blood agar plate cultures of Streptococcus pneumoniae and other alpha-hemolytic streptococci is produced by a hemolysin or, alternatively, by lysis of erythrocytes caused by hydrogen peroxide. We noticed in the course of our investigations that wild-type...

    Erin McDevitt, Faidad Khan, Anna Scasny, Courtney D. Thompson, Zehava Eichenbaum, Larry S. McDaniel, Jorge E. Vidal
    9 Dec 2020
  • TsrA Regulates Virulence and Intestinal Colonization in <em>Vibrio cholerae</em>
    Research Article | Molecular Biology and Physiology
    TsrA Regulates Virulence and Intestinal Colonization in Vibrio cholerae

    Cholera is a potentially lethal disease that is endemic in much of the developing world. Vibrio cholerae, the bacterium underlying the disease, infects humans utilizing proteins encoded on horizontally acquired genetic material. Here, we provide evidence that TsrA, a Vibrionaceae-specific protein, plays a critical role in regulating these genetic elements and...

    Cory D. DuPai, Ashley L. Cunningham, Aaron R. Conrado, Claus O. Wilke, Bryan W. Davies
    9 Dec 2020
  • Detection of Five <em>mcr-9</em>-Carrying <em>Enterobacterales</em> Isolates in Four Czech Hospitals
    Observation | Clinical Science and Epidemiology
    Detection of Five mcr-9-Carrying Enterobacterales Isolates in Four Czech Hospitals

    Infections caused by carbapenemase-producing bacteria have led to the revival of polymyxins as the “last-resort” antibiotic. Since 2016, several reports describing the presence of plasmid-mediated colistin resistance genes, mcr, in different host species and geographic areas were published.

    Ibrahim Bitar, Costas C. Papagiannitsis, Lucie Kraftova, Katerina Chudejova, Vittoria Mattioni Marchetti, Jaroslav Hrabak
    9 Dec 2020
  • Human Papillomavirus 16 (HPV16) E2 Repression of TWIST1 Transcription Is a Potential Mediator of HPV16 Cancer Outcomes
    Research Article | Molecular Biology and Physiology
    Human Papillomavirus 16 (HPV16) E2 Repression of TWIST1 Transcription Is a Potential Mediator of HPV16 Cancer Outcomes

    HPV16-positive cancers have a better clinical outcome that their non-HPV anatomical counterparts. Furthermore, the presence of HPV16 E2 RNA predicts a better outcome for HPV16-positive tumors; the reasons for this are not known.

    Christian T. Fontan, Dipon Das, Molly L. Bristol, Claire D. James, Xu Wang, Hannah Lohner, Azeddine Atfi, Iain M. Morgan
    9 Dec 2020
  • Amylases in the Human Vagina
    Research Article | Host-Microbe Biology
    Amylases in the Human Vagina

    In this study, we show that multiple bacteria in the vaginal community produce amylases that hydrolyze glycogen into simpler sugars (i.e., maltose and maltotriose). These sugars serve as “common goods” that sustain bacterial populations in vaginal communities.

    Kenetta L. Nunn, Geremy C. Clair, Joshua N. Adkins, Kristin Engbrecht, Thomas Fillmore, Larry J. Forney
    9 Dec 2020

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