256 results found
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    ATP-dependent chromatin assembly is functionally distinct from chromatin remodeling

    Sharon E Torigoe et al.
    The Chd1 motor protein performs two functionally distinct ATP-dependent activities, nucleosome assembly and chromatin remodeling, to generate periodic arrays of nucleosomes.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    ATR/Mec1 prevents lethal meiotic recombination initiation on partially replicated chromosomes in budding yeast

    Hannah G Blitzblau, Andreas Hochwagen
    During meiosis, budding yeast use a checkpoint involving the protein Mec1 to prevent the formation of double-strand breaks in DNA that has not completed replication.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Meier-Gorlin syndrome mutation in a conserved C-terminal helix of Orc6 impedes origin recognition complex formation

    Franziska Bleichert et al.
    Electron microscopy uncovers the structure of the origin recognition complex (ORC) in metazoans, and reveals how mutations in the ORC6 subunit lead to Meier-Gorlin syndrome in humans.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    H3K4 mono- and di-methyltransferase MLL4 is required for enhancer activation during cell differentiation

    Ji-Eun Lee et al.
    MLL4 (KMT2D) is a major mammalian H3K4 mono- and di-methyltransferase that is essential for enhancer activation, cell-type-specific gene expression, and cell differentiation.
    1. Cell Biology
    2. Immunology and Inflammation

    Distinct structural and catalytic roles for Zap70 in formation of the immunological synapse in CTL

    Misty R Jenkins et al.
    Inhibition of the catalytic activity of the Zap70 kinase reveals that discrete TCR-regulated events control the remodelling of the actin cytoskeleton when the cytotoxic T cell interacts with its target.
    1. Developmental Biology

    p53 activity is selectively licensed in the Drosophila stem cell compartment

    Annika Wylie et al.
    Ancient features of the p53 regulatory network are coupled to the stem cell compartment in normal and pathologic contexts.
    1. Stem Cells and Regenerative Medicine

    In vivo reprogramming of pancreatic acinar cells to three islet endocrine subtypes

    Weida Li et al.
    Combinations of transcription factors can convert pancreatic acinar cells into endocrine α-, β- and δ-cells in vivo.
    1. Stem Cells and Regenerative Medicine

    Transgressions of compartment boundaries and cell reprogramming during regeneration in Drosophila

    Salvador C Herrera, Ginés Morata
    The reconstruction of damaged structures during regeneration requires cell reprogramming mediated by the up regulation of the JNK pathway and the transient debilitation of the epigenetic control mechanism.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Repair of naturally occurring mismatches can induce mutations in flanking DNA

    Jia Chen et al.
    The repair of spontaneous DNA damage can introduce mutators that lead to further genetic changes, which could underlie evolutionary change, disease and aging.
    1. Chromosomes and Gene Expression

    MicroRNAs down-regulate homologous recombination in the G1 phase of cycling cells to maintain genomic stability

    Young Eun Choi et al.
    MicroRNAs tightly control the cellular level of homologous recombination (HR) factors in the G1 phase, and failure of this control system results in an ectopic increase in HR proteins in G1 cells leading to impaired DNA repair.

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