ArticleEukaryotic cell2012
Tetrahymena thermophila JMJD3 homolog regulates H3K27 methylation and nuclear differentiation.
Article in Eukaryotic cell, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 22 citations in OpenAlex.
- Whats, hows and whys of programmed DNA elimination inOpen biology · 2017Review
- Negative Regulators of an RNAi-Heterochromatin Positive Feedback Loop Safeguard Somatic Genome Integrity in Tetrahymena.Cell reports · 2017Article
- Phosphorylation of an HP1-like Protein Regulates Heterochromatin Body Assembly for DNA Elimination.Developmental cell · 2015Article
- Article
- Developmental regulation of the Tetrahymena thermophila origin recognition complex.PLoS genetics · 2015Article
- Methylation of histone H3K23 blocks DNA damage in pericentric heterochromatin during meiosis.eLife · 2014Article
- Bioinformatic and proteomic analysis of bulk histones reveals PTM crosstalk and chromatin features.Journal of proteome research · 2014Article
- Quantitative proteomics reveals histone modifications in crosstalk with H3 lysine 27 methylation.Molecular & cellular proteomics : MCP · 2014Article
- Quantitative proteomics reveals that the specific methyltransferases Txr1p and Ezl2p differentially affect the mono-, di- and trimethylation states of histone H3 lysine 27 (H3K27).Molecular & cellular proteomics : MCP · 2013Article
- Review
- Cytosine methylation and hydroxymethylation mark DNA for elimination in Oxytricha trifallax.Genome biology · 2012Article
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Histone H3K27me3 modification is an important regulator for development and gene expression. In Tetrahymena thermophila, the complex chromatin dynamics of H3K27me3 marks during nuclear development suggested that an H3K27me3 demethylase might exist. Here, we report an H3K27me3 demethylase homolog, JMJ1, in Tetrahymena. During conjugation, JMJ1 expression is upregulated and the protein is localized first in the parental macronucleus and then in the new macronucleus. In conjugating cells, knockdown of JMJ1 expression resulted in a severe reduction in the production of progeny, suggesting that JMJ1 is essential for Tetrahymena conjugation. Furthermore, knockdown of JMJ1 resulted in increased H3K27 trimethylation in the new macronucleus and reduced transcription of genes related to DNA elimination, while the DNA elimination process was also partially blocked. Knockdown of the H3K27 methyltransferase EZL2 but not that of EZL1 partially restored progeny production in JMJ1-knockdown cells and reduced abnormal H3K27me3 accumulation in the new macronucleus. Taken together, these results demonstrate a critical role for JMJ1 in regulating H3K27me3 during conjugation and the importance of JMJ1 in regulating gene expression in the new macronucleus but not in regulating the formation of heterochromatin associated with programmed DNA deletion.
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