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RNAi-dependent H3K27 methylation is required for heterochromatin formation and DNA elimination in Tetrahymena

Open access
Liu, Yifan, Taverna, Sean D., Muratore, Tara L., Shabanowitz, Jeffrey, Hunt, Donald F., Allis, C. David·2007·Genes & Development

Abstract

Methylated H3K27 is an important mark for Polycomb group (PcG) protein-mediated transcriptional gene silencing (TGS) in multicellular eukaryotes. Here a Drosophila E(z) homolog, EZL1 , is characterized in the ciliated protozoan Tetrahymena thermophila and is shown to be responsible for H3K27 methylation associated with developmentally regulated heterochromatin formation and DNA elimination. Importantly, Ezl1p-catalyzed H3K27 methylation occurs in an RNA interference (RNAi)-dependent manner. H3K27 methylation also regulates H3K9 methylation in these processes. Furthermore, an “effector” of programmed DNA elimination, the chromodomain protein Pdd1p, is shown to bind both K27- and K9-methylated H3. These studies provide a framework for an RNAi-dependent, Polycomb group protein-mediated heterochromatin formation pathway in Tetrahymena and underscore the connection between the two highly conserved machineries in eukaryotes.

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Metadata

Authors
Liu, Y., Taverna, S. D., Muratore, T. L., Shabanowitz, J., Hunt, D. F., & Allis, C. D.
Venue
Genes & Development
Published
2007-06-15
Volume
21
Issue
12
Pages
1530-1545
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2166186329
Cited by
257
References
72
Type
posted content
Language
en
Open access
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CoChat. (2026). Citation check: RNAi-dependent H3K27 methylation is required for heterochromatin formation and DNA elimination in Tetrahymena. https://app.cochat.ai/papers/10.1101/gad.1544207
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Liu, Y., Taverna, S. D., Muratore, T. L., Shabanowitz, J., Hunt, D. F., & Allis, C. D. (2007). RNAi-dependent H3K27 methylation is required for heterochromatin formation and DNA elimination in Tetrahymena. Genes & Development. https://doi.org/10.1101/gad.1544207

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