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chaperone

  • Open Access
    Functional Differences between <span class="named-content genus-species" id="named-content-1">E. coli</span> and ESKAPE Pathogen GroES/GroEL
    Research Article | Molecular Biology and Physiology
    Functional Differences between E. coli and ESKAPE Pathogen GroES/GroEL

    The GroES/GroEL chaperonin from E. coli has long served as the model system for other chaperonins. This assumption seemed valid because of the high conservation between the chaperonins.

    Jared Sivinski, Andrew J. Ambrose, Iliya Panfilenko, Christopher J. Zerio, Jason M. Machulis, Niloufar Mollasalehi, Lynn K. Kaneko, Mckayla Stevens, Anne-Marie Ray, Yangshin Park, Chunxiang Wu, Quyen Q. Hoang, Steven M. Johnson, Eli Chapman
  • Open Access
    <span class="named-content genus-species" id="named-content-1">Mycobacterium tuberculosis</span> Rv0991c Is a Redox-Regulated Molecular Chaperone
    Research Article | Molecular Biology and Physiology
    Mycobacterium tuberculosis Rv0991c Is a Redox-Regulated Molecular Chaperone

    M. tuberculosis infections are responsible for more than 1 million deaths per year. Developing effective strategies to combat this disease requires a greater understanding of M. tuberculosis biology. As in all cells, protein quality control is essential for the viability of...

    Samuel H. Becker, Kathrin Ulrich, Avantika Dhabaria, Beatrix Ueberheide, William Beavers, Eric P. Skaar, Lakshminarayan M. Iyer, L. Aravind, Ursula Jakob, K. Heran Darwin
  • Open Access
    A Chaperone for the Stator Units of a Bacterial Flagellum
    Research Article | Host-Microbe Biology
    A Chaperone for the Stator Units of a Bacterial Flagellum

    The bacterial flagellum is a reversible rotating motor powered by ion transport through stator units, which also exert torque on the rotor component to turn the flagellum for motility. Species-specific adaptations to flagellar motors impact stator function to meet the demands of each species to sufficiently power flagellar rotation. We identified another evolutionary adaptation by discovering that FlgX of...

    Deborah A. Ribardo, Brittni R. Kelley, Jeremiah G. Johnson, David R. Hendrixson
  • Open Access
    Research Article
    High-Throughput Screening of Type III Secretion Determinants Reveals a Major Chaperone-Independent Pathway

    Many bacterial pathogens use specialized nanomachines, including type III secretion systems, to directly inject virulence proteins (effectors) into host cells. Here, we present the first extensive analysis of chaperone dependence in the process of type III effector secretion, providing strong evidence for the existence of a previously unrecognized chaperone-independent pathway. This noncanonical pathway is likely common to many bacteria...

    Nadja Heinz Ernst, Analise Z. Reeves, Julia E. Ramseyer, Cammie F. Lesser
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