Meiotic silencing in Caenorhabditis elegans

Research output: Book/ReportBook

16 Scopus citations

Abstract

In many animals and some fungi, mechanisms have been described that target unpaired chromosomes and chromosomal regions for silencing during meiotic prophase. These phenomena, collectively called "meiotic silencing," target sex chromosomes in the heterogametic sex, for example, the X chromosome in male nematodes and the XY-body in male mice, and also target any other chromosomes that fail to synapse due to mutation or chromosomal rearrangement. Meiotic silencing phenomena are hypothesized to maintain genome integrity and perhaps function in setting up epigenetic control of embryogenesis. This review focuses on meiotic silencing in the nematode, Caenorhabditis elegans, including its mechanism and function(s), and its relationship to other gene silencing processes in the germ line. One hallmark of meiotic silencing in C. elegans is that unpaired/unsynapsed chromosomes and chromosomal regions become enriched for a repressive histone modification, dimethylation of histone H3 on lysine 9 (H3K9me2). Accumulation and proper targeting of H3K9me2 rely on activity of an siRNA pathway, suggesting that histone methyltransferase activity may be targeted/regulated by a small RNA-based transcriptional silencing mechanism.

Original languageEnglish (US)
PublisherUnknown Publisher
Number of pages44
Volume282
EditionC
DOIs
StatePublished - 2010

Publication series

NameInternational Review of Cell and Molecular Biology
No.C
Volume282
ISSN (Print)19376448

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Keywords

  • Chromatin
  • Germ line
  • H3K9me2
  • Histone modification
  • Meiotic silencing
  • RNA-directed RNA polymerase
  • RNAi
  • X chromosome

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Cite this

Maine, E. M. (2010). Meiotic silencing in Caenorhabditis elegans. (C ed.) (International Review of Cell and Molecular Biology; Vol. 282, No. C). Unknown Publisher. https://doi.org/10.1016/S1937-6448(10)82002-7