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| Status |
Public on Jul 08, 2014 |
| Title |
DNA Topoisomerase 1a Promotes RNA-directed DNA Methylation and Histone Lysine 9 Dimethylation at Transposable Elements in Arabidopsis [RNA-Seq] |
| Organism |
Arabidopsis thaliana |
| Experiment type |
Non-coding RNA profiling by high throughput sequencing
|
| Summary |
RNA-directed DNA methylation (RdDM) is a transcriptional silencing mechanism mediated by small and long noncoding RNAs produced by the plant-specific RNA polymerases Pol IV and Pol V, respectively. Through a chemical genetics screen with a luciferase-based DNA methylation reporter, LUCL, we found that camptothecin, a compound with anti-cancer properties that targets DNA topoisomerase 1a (TOP1a) was able to de-repress LUCL by reducing its DNA methylation and H3K9 dimethylation (H3K9me2) levels. Further studies with Arabidopsis top1a mutants showed that TOP1a promotes RdDM by facilitating the production of Pol V-dependent long non-coding RNAs, AGONAUTE4 recruitment and H3K9me2 deposition at transposable elements (TEs).
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| |
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| Overall design |
5 small RNA libraries were sequenced
|
| |
|
| Contributor(s) |
Dinh TT, Gao L, Chen X |
| Citation(s) |
24992598 |
| |
| Submission date |
Sep 10, 2013 |
| Last update date |
May 15, 2019 |
| Contact name |
Lei Gao |
| E-mail(s) |
[email protected]
|
| Organization name |
shenzhen university
|
| Department |
College of Life Sciences
|
| Street address |
Nanhai Ave 3688
|
| City |
shenzhen |
| State/province |
guangdong |
| ZIP/Postal code |
518060 |
| Country |
China |
| |
|
| Platforms (1) |
| GPL13222 |
Illumina HiSeq 2000 (Arabidopsis thaliana) |
|
| Samples (5)
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| This SubSeries is part of SuperSeries: |
| GSE50720 |
DNA Topoisomerase 1α Promotes RNA-directed DNA Methylation and Histone Lysine 9 Dimethylation at Transposable Elements in Arabidopsis |
|
| Relations |
| BioProject |
PRJNA218580 |
| SRA |
SRP029738 |
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