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Nat Rev Genet. 2011 Feb;12(2):123-35. doi: 10.1038/nrg2932. Epub 2011 Jan 11.

Silencing chromatin: comparing modes and mechanisms.

Author information

1
Department of Biosystems Science and Engineering, ETH Z├╝rich, Switzerland.

Abstract

Recent transcriptome analyses show that substantial proportions of eukaryotic genomes can be copied into RNAs, many of which do not encode protein sequences. However, cells have developed mechanisms to control and counteract the high transcriptional activity of RNA polymerases in order to achieve cell-specific gene activity or to prevent the expression of deleterious sequences. Here we compare how two silencing modes - the Polycomb system and heterochromatin - are targeted, established and maintained at different chromosomal locations and how DNA-binding proteins and non-coding RNAs connect these epigenetically stable and heritable structures to the sequence information of the DNA.

PMID:
21221116
DOI:
10.1038/nrg2932
[Indexed for MEDLINE]

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