ArticleThe EMBO journal2022
Chromatin remodeling is required for sRNA-guided DNA elimination in Paramecium.
Article in The EMBO journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 17 citations in OpenAlex.
- The tiny germline chromosomes of Paramecium aurelia have an exceptionally high recombination rate and are capped by a new class of Helitrons.BMC biology · 2026Article
- A developmental condensin I complex assists the Paramecium PiggyMac domesticated transposase during programmed DNA elimination.Nucleic acids research · 2026Article
- A H3K27me3 reader complex couples H3K27me3 accumulation to nascent transcription of transposable elements in Paramecium.Genome biology · 2026Article
- Relaxed DNA substrate specificity of transposases involved in programmed genome rearrangement.Nucleic acids research · 2025Article
- ISWI1 complex proteins facilitate developmental genome editing inGenome research · 2025Article
- Widespread 3D genome reorganization precedes programmed DNA rearrangement inbioRxiv : the preprint server for biology · 2025Article
- GTSF1 is required for transposon silencing in the unicellular eukaryote Paramecium tetraurelia.Nucleic acids research · 2024Article
- Two paralogous PHD finger proteins participate in natural genome editing in Paramecium tetraurelia.Journal of cell science · 2024Article
- Structural maintenance of chromosomes (SMC) proteins are required for DNA elimination inLife science alliance · 2024Article
- Inter-generational nuclear crosstalk links the control of gene expression to programmed genome rearrangement during the Paramecium sexual cycle.Nucleic acids research · 2023Article
- MITE infestation accommodated by genome editing in the germline genome of the ciliateProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Chromatin remodeling is required for sRNA-guided DNA elimination in Paramecium.The EMBO journal · 2022Article
- Developmental timing of programmed DNA elimination inGenome researchArticle
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
Small RNAs mediate the silencing of transposable elements and other genomic loci, increasing nucleosome density and preventing undesirable gene expression. The unicellular ciliate Paramecium is a model to study dynamic genome organization in eukaryotic cells, given its unique feature of nuclear dimorphism. Here, the formation of the somatic macronucleus during sexual reproduction requires eliminating thousands of transposon remnants (IESs) and transposable elements scattered throughout the germline micronuclear genome. The elimination process is guided by Piwi-associated small RNAs and leads to precise cleavage at IES boundaries. Here we show that IES recognition and precise excision are facilitated by recruiting ISWI1, a Paramecium homolog of the chromatin remodeler ISWI. ISWI1 knockdown substantially inhibits DNA elimination, quantitatively similar to development-specific sRNA gene knockdowns but with much greater aberrant IES excision at alternative boundaries. We also identify key development-specific sRNA biogenesis and transport proteins, Ptiwi01 and Ptiwi09, as ISWI1 cofactors in our co-immunoprecipitation studies. Nucleosome profiling indicates that increased nucleosome density correlates with the requirement for ISWI1 and other proteins necessary for IES excision. We propose that chromatin remodeling together with small RNAs is essential for efficient and precise DNA elimination in Paramecium.
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