Home
Reference Report
| Reference | |||
|---|---|---|---|
| Citation | Cernilogar, F.M., Onorati, M.C., Kothe, G.O., Burroughs, A.M., Parsi, K.M., Breiling, A., Lo Sardo, F., Saxena, A., Miyoshi, K., Siomi, H., Siomi, M.C., Carninci, P., Gilmour, D.S., Corona, D.F., Orlando, V. (2011). Chromatin-associated RNA interference components contribute to transcriptional regulation in Drosophila. Nature 480(7377): 391--395. (Export to RIS) | ||
| FlyBase ID | FBrf0216979 | ||
| Publication Type | Research paper | ||
| PubMed ID | 22056986 | ||
| PubMed Abstract | RNA interference (RNAi) pathways have evolved as important modulators of gene expression that operate in the cytoplasm by degrading RNA target molecules through the activity of short (21-30 nucleotide) RNAs. RNAi components have been reported to have a role in the nucleus, as they are involved in epigenetic regulation and heterochromatin formation. However, although RNAi-mediated post-transcriptional gene silencing is well documented, the mechanisms of RNAi-mediated transcriptional gene silencing and, in particular, the role of RNAi components in chromatin dynamics, especially in animal multicellular organisms, are elusive. Here we show that the key RNAi components Dicer 2 (DCR2) and Argonaute 2 (AGO2) associate with chromatin (with a strong preference for euchromatic, transcriptionally active, loci) and interact with the core transcription machinery. Notably, loss of function of DCR2 or AGO2 showed that transcriptional defects are accompanied by the perturbation of RNA polymerase II positioning on promoters. Furthermore, after heat shock, both Dcr2 and Ago2 null mutations, as well as missense mutations that compromise the RNAi activity, impaired the global dynamics of RNA polymerase II. Finally, the deep sequencing of the AGO2-associated small RNAs (AGO2 RIP-seq) revealed that AGO2 is strongly enriched in small RNAs that encompass the promoter regions and other regions of heat-shock and other genetic loci on both the sense and antisense DNA strands, but with a strong bias for the antisense strand, particularly after heat shock. Taken together, our results show that DCR2 and AGO2 are globally associated with transcriptionally active loci and may have a pivotal role in shaping the transcriptome by controlling the processivity of RNA polymerase II. | ||
| DOI | 10.1038/nature10492 | ||
| Related Publication(s) | |||
| Note | Gene regulation: RNAi gets stuck into transcription. Muers, 2012, Nat. Rev. Genet. 13(1): 2 [FBrf0218610] |
||
Recent Updates
|
|||
| Description |
What does this section display?
This section contains items that were added to this record for each release.
It currently only tracks new links between this FlyBase report and other
FlyBase data classes (e.g. genes, references, stocks) or controlled
vocabulary terms (e.g. GO, anatomy terms).
What does this section not display?
This section does not currently display links that were removed or gene model changes.
|
||
| Update Feed |
Click the icon below to subscribe to this FlyBase record and receive updates automatically through your
feed reader.
|
||
| FB2013_03 | |||
| FB2013_02 | |||
| All updates | Click here to see a list of all updates to this record from FB2010_08 and on. | ||
|
Associated Information
|
|||
| Comments | |||
| Associated Files | |||
|
Other Information
|
|||
| Secondary IDs | |||
| Language of Publication | English | ||
| Additional Languages of Abstract | |||
| Also Published As | |||
|
Parent Publication
|
|||
| Publication Type | Journal | ||
| Abbreviation | Nature | ||
| Title | Nature | ||
| Publication Year | 1869- | ||
| ISBN/ISSN | 0028-0836 | ||
|
Data from Reference
|
|||
| Genes (32)
|
|||