3,362 results found
    1. Biochemistry and Chemical Biology

    RNA World: Visualizing primer extension without enzymes

    John C Chaput
    X-ray crystallography has been used to observe the synthesis of RNA in the absence of enzymes with atomic resolution.
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    1. Computational and Systems Biology
    2. Structural Biology and Molecular Biophysics

    Approaching boiling point stability of an alcohol dehydrogenase through computationally-guided enzyme engineering

    Friso S Aalbers et al.
    By combining structure-based computational predictions and a thorough structural analysis, a highly thermostable enzyme, alcohol dehydrogenase, has been engineered.
    1. Microbiology and Infectious Disease

    Discovery and characterization of a prevalent human gut bacterial enzyme sufficient for the inactivation of a family of plant toxins

    Nitzan Koppel et al.
    A unique, widely distributed gut bacterial enzyme selectively metabolizes plant-derived cardiac glycoside drugs.
    1. Cell Biology
    2. Physics of Living Systems

    Golgi compartments enable controlled biomolecular assembly using promiscuous enzymes

    Anjali Jaiman, Mukund Thattai
    By partitioning promiscuous enzymes across multiple Golgi compartments, eukaryotic cells can tightly control the synthesis of complex sugar oligomers.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Relief of autoinhibition by conformational switch explains enzyme activation by a catalytically dead paralog

    Oleg A Volkov et al.
    A catalytically dead paralog activates its cognate enzyme through an allosteric mechanism that combined structural and phylogenomic analysis indicates arose through acquisition of a dimerization domain, suggesting a general model for how complex allostery evolves.
    1. Computational and Systems Biology

    Design principles of autocatalytic cycles constrain enzyme kinetics and force low substrate saturation at flux branch points

    Uri Barenholz et al.
    The stability of metabolic autocatalytic cycles that are widespread in central metabolism limits the affinities of enzymes at flux branch points and explains excess expression of these enzymes.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular basis for catabolism of the abundant metabolite trans-4-hydroxy-L-proline by a microbial glycyl radical enzyme

    Lindsey RF Backman et al.
    The common post-translational modification trans-4-hydroxy-L-proline is reversed by gut microbes with the help of hydroxyproline dehydratase (HypD), an enzyme that performs a radical chemical mechanism.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Cryptic genetic variation shapes the adaptive evolutionary potential of enzymes

    Florian Baier et al.
    Genetic change among enzyme orthologous with similar phenotypic properties can cause substantial differences in evolutionary response to a new enzyme function in terms of their molecular and fitness outcomes.
    1. Biochemistry and Chemical Biology
    2. Genetics and Genomics

    Evolution of substrate specificity in a retained enzyme driven by gene loss

    Ana Lilia Juárez-Vázquez et al.
    An integrated biochemical and evolutionary analysis shows how enzyme specificity evolves after gene loss during genome decay, implicating relaxation of purifying selection as a driving force for functional divergence.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Filament formation by metabolic enzymes is a specific adaptation to an advanced state of cellular starvation

    Ivana Petrovska et al.
    A starvation-induced drop in cytosolic pH promotes assembly of budding yeast glutamine synthetase into enzymatically inactive filaments that function as enzyme storage depots.

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