53 results found
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    An intracellular anion channel critical for pigmentation

    Nicholas W Bellono et al.
    Oculocutaneous albinism II (OCA2) contributes to a melanosome-specific anion channel that modulates organellar pH and is critical for melanin synthesis.
    1. Structural Biology and Molecular Biophysics

    Screening of candidate substrates and coupling ions of transporters by thermostability shift assays

    Homa Majd et al.
    It is technically difficult to identify transport proteins, but here a method is presented that exploits the principle that they are stabilized in detergent solution when they bind their substrate.
    1. Structural Biology and Molecular Biophysics
    2. Immunology and Inflammation

    Serum amyloid A is a retinol binding protein that transports retinol during bacterial infection

    Mehabaw G Derebe et al.
    Serum amyloid A proteins bind retinol with nanomolar affinity, and do so by forming oligomers that create a hydrophobic pocket that shields retinol from the aqueous environment.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structure of the potassium-chloride cotransporter KCC4 in lipid nanodiscs

    Michelle S Reid et al.
    The structure of the potassium-chloride cotransporter KCC4 provides insight into the basis of ion specificity, transport stoichiometry, and activity regulation for a broadly physiologically and clinically important transporter family.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Coupling of remote alternating-access transport mechanisms for protons and substrates in the multidrug efflux pump AcrB

    Thomas Eicher et al.
    A transport mechanism is uncovered in the major drug-efflux system in E. coli involving two remote alternating-access conformational cycles, which could provide the basis for the development of allosteric inhibitors against multidrug resistance.
    1. Cell Biology
    2. Plant Biology

    TIR1/AFB-Aux/IAA auxin perception mediates rapid cell wall acidification and growth of Arabidopsis hypocotyls

    Matyáš Fendrych et al.
    The nuclear pathway for auxin perception is responsible for the rapid auxin-induced cell wall acidification and growth of aerial organs of plants.
    1. Cell Biology

    High lumenal chloride in the lysosome is critical for lysosome function

    Kasturi Chakraborty et al.
    Lysosomes are highly enriched in chloride, which is essential for their degradative function.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Ribosomal mutations promote the evolution of antibiotic resistance in a multidrug environment

    James E Gomez et al.
    Mutations in several components of a bacterial ribosome are shown to broadly decrease antibiotic and stress sensitivity, and readily accessible reversion mutations allow these ribosomal mutations to serve as stepping stones to high level antibiotic resistance.
    1. Microbiology and Infectious Disease

    Effective use of a horizontally-transferred pathway for dichloromethane catabolism requires post–transfer refinement

    Joshua K Michener et al.
    Adapting bacteria to use an introduced metabolic pathway recapitulates natural mutations and offers a novel bioremediation strategy.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A family of fluoride-specific ion channels with dual-topology architecture

    Randy B Stockbridge et al.
    Efflux of xenobiotic fluoride from microorganisms occurs through a novel family of ion channels with stringent selectivity for fluoride ion and dual-topology molecular architecture.

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