Liu, Yongqiang; Niu, Junhua; Ye, Fei; Solberg, Therese; Lu, Borong; Wang, Chundi; Nowacki, Mariusz; Gao, Shan (2024). Dynamic DNA N 6-adenine methylation (6mA) governs the encystment process, showcased in the unicellular eukaryote Pseudocohnilembus persalinus. Genome research, 34(2), pp. 256-271. Cold Spring Harbor, N.Y 10.1101/gr.278796.123
Full text not available from this repository. (Request a copy)The formation of resting cysts commonly found in unicellular eukaryotes is a complex and highly regulated survival strategy against environmental stress that involves drastic physiological and biochemical changes. Although most studies have focused on the morphology and structure of cysts, little is known about the molecular mechanisms that control this process. Recent studies indicate that DNA N 6-adenine methylation (6mA) could be dynamically changing in response to external stimuli; however, its potential role in the regulation of cyst formation remains unknown. We used the ciliate Pseudocohnilembus persalinus, which can be easily induced to form cysts to investigate the dynamic pattern of 6mA in trophonts and cysts. Single-molecule real-time (SMRT) sequencing reveals high levels of 6mA in trophonts that decrease in cysts, along with a conversion of symmetric 6mA to asymmetric 6mA. Further analysis shows that 6mA, a mark of active transcription, is involved in altering the expression of encystment-related genes through changes in 6mA levels and 6mA symmetric-to-asymmetric conversion. Most importantly, we show that reducing 6mA levels by knocking down the DNA 6mA methyltransferase PpAMT1 accelerates cyst formation. Taken together, we characterize the genome-wide 6mA landscape in P. persalinus and provide insights into the role of 6mA in gene regulation under environmental stress in eukaryotes. We propose that 6mA acts as a mark of active transcription to regulate the encystment process along with symmetric-to-asymmetric conversion, providing important information for understanding the molecular response to environmental cues from the perspective of 6mA modification.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Department of Biology > Institute of Cell Biology |
UniBE Contributor: |
Solberg, Therese, Nowacki, Mariusz |
Subjects: |
500 Science > 570 Life sciences; biology |
ISSN: |
1549-5469 |
Publisher: |
Cold Spring Harbor, N.Y |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
13 Mar 2024 10:37 |
Last Modified: |
22 Mar 2024 00:17 |
Publisher DOI: |
10.1101/gr.278796.123 |
PubMed ID: |
38471739 |
URI: |
https://boris.unibe.ch/id/eprint/194193 |
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