220 results found
    1. Biochemistry and Chemical Biology

    A bacterial riboswitch class for the thiamin precursor HMP-PP employs a terminator-embedded aptamer

    Ruben M Atilho et al.
    Many bacteria use a tiny riboswitch aptamer to sense the thiamin precursor HMP-PP to regulate the production of another thiamin precursor HET-P to efficiently biosynthesize this essential coenzyme.
    1. Structural Biology and Molecular Biophysics

    Structures of two aptamers with differing ligand specificity reveal ruggedness in the functional landscape of RNA

    Andrew John Knappenberger et al.
    RNA aptamers that are closely related and share a common scaffold can readily adapt to recognize new ligands through changes in just a few nucleotides.
    1. Biochemistry and Chemical Biology

    Tandem riboswitches form a natural Boolean logic gate to control purine metabolism in bacteria

    Madeline E Sherlock et al.
    A riboswitch class has been discovered for phosphoribosyl pyrophosphate, the biochemical precursor of nucleotides, and this novel RNA sensor commonly operates in tandem with a guanine aptamer to function like a Boolean logic gate.
    1. Cell Biology

    The step-wise pathway of septin hetero-octamer assembly in budding yeast

    Andrew Weems, Michael McMurray
    In budding yeast cells, slow monomeric septin GTPase activity and the cytosolic GTP:GDP ratio dictate the relative incorporation of alternative subunits during septin hetero-oligomer assembly, which proceeds by discrete, ordered steps dependent on allostery between interaction interfaces.
    1. Structural Biology and Molecular Biophysics

    Observation of long-range tertiary interactions during ligand binding by the TPP riboswitch aptamer

    Van K Duesterberg et al.
    The combined use of optical trapping and single-molecule FRET permits the study of riboswitch structure formation and conformational dynamics at the same time.
    1. Biochemistry and Chemical Biology

    Gene Regulation: Acting in tandem

    Robert A Battaglia, Ailong Ke
    RNA structures called tandem riboswitches allow bacteria to employ complex logical operations in response to nutrient starvation.
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    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Chromatin: Assembly, remodelled

    Karim Bouazoune, Robert E Kingston
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    1. Biochemistry and Chemical Biology

    Non-enzymatic primer extension with strand displacement

    Lijun Zhou et al.
    Relying on RNA fragments derived from degradation or partial template copying, non-enzymatic primer extension with strand displacement offers a novel and prebiotically plausible approach to RNA self-replication.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    ATP-induced asymmetric pre-protein folding as a driver of protein translocation through the Sec machinery

    Robin A Corey et al.
    How the process of protein folding may be controlled by the Sec machinery to assist protein transport across membranes.

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