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| Status |
Public on Aug 15, 2011 |
| Title |
RNAi-independent role for Argonaute2 in CTCF/CP190 chromatin insulator function |
| Organism |
Drosophila melanogaster |
| Experiment type |
Genome binding/occupancy profiling by high throughput sequencing
|
| Summary |
Chromatin insulators and Polycomb group (PcG) complexes control nuclear organization to effect changes in gene expression. In Drosophila, RNA silencing pathways influence long range interactions mediated by PcG proteins and nuclear localization of the gypsy insulator; however, the underlying mechanisms are unknown. Here, we identify a singular requirement for Argonaute2 (AGO2) for the activity of the CCCTC-binding factor (CTCF)/Centrosomal protein 190 (CP190) dependent Fab-8 insulator. AGO2 and CP190 interact physically, and genome wide localization of AGO2 by chromatin immunoprecipitation and sequencing (ChIP-seq) reveals extensive colocalization of AGO2 with insulators and Polycomb Response Elements (PREs) but minimal overlap with regions of endogenous small interfering RNA (endo-siRNA) production. Finally, depletion of either CTCF or CP190 results in loss of AGO2 association with insulators, PREs, and other cis-regulatory regions. Our findings suggest that Dicer-independent recruitment of AGO2 to chromatin by insulator proteins promotes the definition of transcriptional domains throughout the genome.
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| |
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| Overall design |
ChIP-seq of AGO2 in two Drosophila cell types (S2 and S3)
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| |
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| Contributor(s) |
Lei EP, Moshkovich N, Dale RK |
| Citation(s) |
21852534 |
| Submission date |
Jun 29, 2010 |
| Last update date |
May 15, 2019 |
| Contact name |
Ryan Dale |
| E-mail(s) |
dalerr@nih.gov
|
| Organization name |
National Institutes of Health
|
| Department |
National Institute of Child Health and Human Development
|
| Lab |
Bioinformatics and Scientific Programming Core
|
| Street address |
Rm 10D39, 10 Center Drive
|
| City |
Bethesda |
| State/province |
MD |
| ZIP/Postal code |
20892 |
| Country |
USA |
| |
|
| Platforms (1) |
| GPL9058 |
Illumina Genome Analyzer (Drosophila melanogaster) |
|
| Samples (6)
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| Relations |
| SRA |
SRP002788 |
| BioProject |
PRJNA128509 |
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