238 results found
    1. Structural Biology and Molecular Biophysics

    Molecular architecture of human polycomb repressive complex 2

    Claudio Ciferri et al.
    Electron microscopy has been used to produce the first three-dimensional image of the PRC2 gene-silencing complex.
    1. Biochemistry and Chemical Biology

    Conserved RNA-binding specificity of polycomb repressive complex 2 is achieved by dispersed amino acid patches in EZH2

    Yicheng Long et al.
    Biochemical and mutagenesis analysis reveal the long-anticipated RNA-binding elements of Polycomb Repressive Complex 2 (PRC2), an important chromatin modifier, allowing construction of separation-of-function mutants of PRC2 defective in RNA binding but retaining histone-modifying activity.
    1. Chromosomes and Gene Expression

    Conversion of random X-inactivation to imprinted X-inactivation by maternal PRC2

    Clair Harris et al.
    The PRC2 Polycomb complex made in the mouse oocyte prevents transcriptional inactivation of the maternal X-chromosome in the early embryo.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    Structural basis for PRC2 decoding of active histone methylation marks H3K36me2/3

    Ksenia Finogenova et al.
    Nucleosome binding by PRC2 threads H3K27 into its active site via an interaction network set in register by unmodified H3K36.
    1. Chromosomes and Gene Expression

    RYBP stimulates PRC1 to shape chromatin-based communication between Polycomb repressive complexes

    Nathan R Rose et al.
    The E3 ubiquitin ligase activity of polycomb repressive complex 1 is stimulated by RYBP to support a histone modification-dependent communication between polycomb repressive complexes in mice.
    1. Developmental Biology
    2. Chromosomes and Gene Expression

    EED orchestration of heart maturation through interaction with HDACs is H3K27me3-independent

    Shanshan Ai et al.
    During heart maturation, embryonic ectoderm development as a chromatin remodeler triggers transcriptional silencing, while H3K27me3 is a passenger that is not sufficient for gene silencing.
    1. Chromosomes and Gene Expression
    2. Plant Biology

    Local chromatin environment of a Polycomb target gene instructs its own epigenetic inheritance

    Scott Berry et al.
    Two copies of a Polycomb target gene in the same cell can be maintained in independently heritable expression states, demonstrating that long-term memory of gene expression is stored locally.
    1. Structural Biology and Molecular Biophysics

    Structural basis for histone variant H3tK27me3 recognition by PHF1 and PHF19

    Cheng Dong et al.
    Complex structures of Tudor domains of PHF1/19 with H3tK27me3 provide structural basis for preferential recognition of H3tK27me3 over canonical H3K27me3, implicating that H3tK27me3 might be a physiological ligand of PHF1/19.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Protein quality control in the nucleolus safeguards recovery of epigenetic regulators after heat shock

    Maria Azkanaz et al.
    Heat shock induces relocalization of epigenetic modifiers to the nucleolus, which acts as a dedicated protein quality control center that is indispensable for recovery of epigenetic regulators and epigenetic modifications.
    1. Chromosomes and Gene Expression

    Differentiating Drosophila female germ cells initiate Polycomb silencing by regulating PRC2-interacting proteins

    Steven Z DeLuca et al.
    Characterization of Drosophila female germ cell differentiation shows that nurse cells initiate Polycomb silencing by regulating Pcl and Scm levels to alter the biochemical properties of the PRC2 H3K27 methylase.

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