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| Status |
Public on Aug 27, 2015 |
| Title |
PARP1- and CTCF-mediated interactions between active and repressed chromatin at the lamina promote oscillating transcription |
| Organism |
Homo sapiens |
| Experiment type |
Genome binding/occupancy profiling by high throughput sequencing
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| Summary |
Transcriptionally active and inactive chromatin domains tend to segregate into separate sub-nuclear compartments to maintain stable expression patterns. However, we have uncovered here an inter-chromosomal network connecting active loci enriched in circadian genes to repressed lamina-associated domains (LADs). The interactome is regulated by PARP1 and its co-factor, CTCF, which not only mediate chromatin fiber interactions, but also promote the recruitment of circadian genes to the lamina. Synchronization of circadian rhythm by serum shock induces oscillations in PARP1-CTCF interactions, which is accompanied by oscillating recruitment of circadian loci to the lamina, followed by the acquisition of repressive H3K9me2 marks and transcriptional attenuation. Furthermore, depletion of H3K9me2/3, inhibition of PARP activity by Olaparib or down-regulation of PARP1 or CTCF expression counteracts both recruitment to the envelope and circadian transcription. PARP1- and CTCF-regulated contacts between circadian loci and the repressive chromatin environment at the lamina thus mediate circadian transcriptional plasticity.
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| Overall design |
ChIP-Seq for H3k9me2 in HCT116 colon cancer cells (2 replicates)
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| Contributor(s) |
Zhao H, Sifakis EG, Sumida N, Millán-Ariño L, Scholz BA, Svensson PJ, Chen X, Ronnegren AL, Diettrich Mallet de Lima C, Shahin Varnoosfaderani F, Shi C, Loseva O, Yammine S, Israelsson M, Rathje L, Németi B, Fredlund E, Helleday T, Imreh MP, Göndör A |
| Citation(s) |
26321255 |
| Submission date |
Jun 16, 2014 |
| Last update date |
May 15, 2019 |
| Contact name |
Anita Göndör |
| Organization name |
Karolinska Institutet
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| Department |
MTC
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| Lab |
Anita Göndör group
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| Street address |
Nobels väg 16, KI Solna Campus, Karolinska Institutet, Box 280
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| City |
Stockholm |
| ZIP/Postal code |
171 77 |
| Country |
Sweden |
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| Platforms (1) |
| GPL16791 |
Illumina HiSeq 2500 (Homo sapiens) |
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| Samples (2) |
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| Relations |
| BioProject |
PRJNA252844 |
| SRA |
SRP043283 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE58534_RAW.tar |
35.8 Mb |
(http)(custom) |
TAR (of BED) |
SRA Run Selector |
| Raw data are available in SRA |
| Processed data provided as supplementary file |
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