140 results found
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Channel nuclear pore complex subunits are required for transposon silencing in Drosophila

    Marzia Munafò et al.
    By linking export and licensing of a piRNA precursor transcript, channel nuclear pore complex subunits Nup54 and Nup58 are specifically required to silence transposons in the Drosophila ovary.
    1. Chromosomes and Gene Expression
    2. Developmental Biology

    Maternally inherited piRNAs direct transient heterochromatin formation at active transposons during early Drosophila embryogenesis

    Martin H Fabry et al.
    Maternally deposited Piwi-piRNA complexes co-transcriptionally repress transposable elements that transiently become active in somatic cells of the developing Drosophila embryo.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    SNPC-1.3 is a sex-specific transcription factor that drives male piRNA expression in C. elegans

    Charlotte P Choi et al.
    snpc-1.3 specifies male piRNA transcription and is regulated by the sex determination pathway.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Heterochromatin-dependent transcription of satellite DNAs in the Drosophila melanogaster female germline

    Xiaolu Wei et al.
    The piRNA pathway regulates satellite DNAs in the Drosophila melanogaster germline and affects heterochromatin establishment at pericentromeric satellite DNA in embryos, implying a general role for piRNAs in ensuring genome stability.
    1. Genetics and Genomics

    Environmentally-induced epigenetic conversion of a piRNA cluster

    Karine Casier et al.
    Activation of a piRNA cluster is achieved by high temperature and without maternal inheritance of homologous piRNAs highlighting how variations of species natural habitat can become heritable and shape epigenome.
    1. Chromosomes and Gene Expression

    piRNA-guided co-transcriptional silencing coopts nuclear export factors

    Martin H Fabry et al.
    A member of the Drosophila Nuclear Export Factor (Nxf) family, Nxf2, forms part of the piRNA-dependent co-transcriptional silencing complex and is essential for transposon repression in fly ovaries.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Evolutionary dynamics of transposable elements in bdelloid rotifers

    Reuben W Nowell et al.
    An investigation of transposable element evolution in a group of long-term asexual animals shows that many of the predicted effects of asexuality are not observed.
    1. Stem Cells and Regenerative Medicine

    Ovaries absent links dLsd1 to HP1a for local H3K4 demethylation required for heterochromatic gene silencing

    Fu Yang et al.
    A Drosophila fertility gene is identified that acts as a linker between HP1a and local H3K4 demethylation during HP1a-mediated gene silencing that is required for ovary development and transposon silencing..
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Water-mediated recognition of t1-adenosine anchors Argonaute2 to microRNA targets

    Nicole T Schirle et al.
    Argonaute proteins directly contact adenosine nucleotides in some miRNA target sites, leading to enhanced repression of the target mRNA.
    1. Chromosomes and Gene Expression

    A tudor domain protein, SIMR-1, promotes siRNA production at piRNA-targeted mRNAs in C. elegans

    Kevin I Manage et al.
    SIMR-1 acts downstream of the piRNA pathway to promote siRNA amplification by the Mutator complex and localizes to perinuclear foci distinct from Mutator foci, P granules and Z granules.

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