1,923 results found
    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. Genomics and Evolutionary Biology

    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.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Transcriptomic and proteomic landscape of mitochondrial dysfunction reveals secondary coenzyme Q deficiency in mammals

    Inge Kühl et al.
    Comparative -omic analyses of five knockout mouse strains with disrupted mitochondrial DNA expression at different levels provide a high quality resource of altered gene expression patterns that reveal several common secondary patophysiological changes of mitochondrial dysfunction.
    1. Biochemistry and Chemical Biology
    2. Human Biology and Medicine

    B4GAT1 is the priming enzyme for the LARGE-dependent functional glycosylation of α-dystroglycan

    Jeremy L Praissman et al.
    The correct enzymatic activity of a previously misnamed enzyme is defined, placing the enzyme upstream of LARGE in building functional O-mannose structures on α-dystroglycan that are disrupted in multiple forms of congenital muscular dystrophy.
    1. Genes and Chromosomes

    Major satellite repeat RNA stabilize heterochromatin retention of Suv39h enzymes by RNA-nucleosome association and RNA:DNA hybrid formation

    Oscar Velazquez Camacho et al.
    An RNA-mediated mechanism that stabilizes association of the Suv39h enzymes at mouse heterochromatin is defined.
    1. Cell Biology

    A bioactive peptide amidating enzyme is required for ciliogenesis

    Dhivya Kumar et al.
    Analysis of Chlamydomonas, planaria and mice reveals a novel and unanticipated role for a peptide amidating enzyme in primary and motile ciliary assembly through effects on post-Golgi trafficking.
    1. Structural Biology and Molecular Biophysics
    2. Genes and Chromosomes

    Structural reorganization of the chromatin remodeling enzyme Chd1 upon engagement with nucleosomes

    Ramasubramanian Sundaramoorthy et al.
    Structural models of the chromatin remodeling enzyme Chd1 in solution and when bound to chromatin indicate that conformational changes to both the enzyme and the nucleosome occur upon nucleotide dependent engagement.

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