PRC2 is high maintenance

JR Yu, CH Lee, O Oksuz, JM Stafford… - Genes & …, 2019 - genesdev.cshlp.org
As the process that silences gene expression ensues during development, the stage is set
for the activity of Polycomb-repressive complex 2 (PRC2) to maintain these repressed gene …

Programmed chromosome fragmentation in ciliated protozoa: multiple means to chromosome ends

M Bétermier, LA Klobutcher, E Orias - Microbiology and Molecular …, 2023 - Am Soc Microbiol
Ciliated protozoa undergo large-scale developmental rearrangement of their somatic
genomes when forming a new transcriptionally active macronucleus during conjugation …

Conserved chromosomal functions of RNA interference

MJ Gutbrod, RA Martienssen - Nature Reviews Genetics, 2020 - nature.com
RNA interference (RNAi), a cellular process through which small RNAs target and regulate
complementary RNA transcripts, has well-characterized roles in post-transcriptional gene …

Role of Polycomb in the control of transposable elements

A Déléris, F Berger, S Duharcourt - Trends in Genetics, 2021 - cell.com
It is generally considered that Polycomb Repressive Complex (PRC) 2 deposits the histone
mark H3K27me3 on silent protein-coding genes, while transposable elements are …

A small RNA-guided PRC2 complex eliminates DNA as an extreme form of transposon silencing

C Wang, T Solberg, XX Maurer-Alcala, EC Swart… - Cell reports, 2022 - cell.com
In animal germlines, transposons are silenced at the transcriptional or post-transcriptional
level to prevent deleterious expression. Ciliates employ a more direct approach by …

The Polycomb protein Ezl1 mediates H3K9 and H3K27 methylation to repress transposable elements in Paramecium

A Frapporti, C Miró Pina, O Arnaiz, D Holoch… - Nature …, 2019 - nature.com
In animals and plants, the H3K9me3 and H3K27me3 chromatin silencing marks are
deposited by different protein machineries. H3K9me3 is catalyzed by the SET-domain SU …

Programmed genome rearrangements in ciliates

I Rzeszutek, XX Maurer-Alcalá, M Nowacki - Cellular and Molecular Life …, 2020 - Springer
Ciliates are a highly divergent group of unicellular eukaryotes with separate somatic and
germline genomes found in distinct dimorphic nuclei. This characteristic feature is tightly …

Paramecium Polycomb repressive complex 2 physically interacts with the small RNA-binding PIWI protein to repress transposable elements

C Miró-Pina, O Charmant, T Kawaguchi, D Holoch… - Developmental cell, 2022 - cell.com
Summary Polycomb repressive complex 2 (PRC2) maintains transcriptionally silent genes in
a repressed state via deposition of histone H3K27-trimethyl (me3) marks. PRC2 has also …

MITE infestation accommodated by genome editing in the germline genome of the ciliate Blepharisma

BKB Seah, M Singh, C Emmerich… - Proceedings of the …, 2023 - National Acad Sciences
During their development following sexual conjugation, ciliates excise numerous internal
eliminated sequences (IESs) from a copy of the germline genome to produce the functional …

Massive colonization of protein-coding exons by selfish genetic elements in Paramecium germline genomes

D Sellis, F Guérin, O Arnaiz, W Pett, E Lerat… - PLoS …, 2021 - journals.plos.org
Ciliates are unicellular eukaryotes with both a germline genome and a somatic genome in
the same cytoplasm. The somatic macronucleus (MAC), responsible for gene expression, is …