TY - JOUR
T1 - An endogenous small interfering RNA pathway in Drosophila
AU - Czech, Benjamin
AU - Malone, Colin D.
AU - Zhou, Rui
AU - Stark, Alexander
AU - Schlingeheyde, Catherine
AU - Dus, Monica
AU - Perrimon, Norbert
AU - Kellis, Manolis
AU - Wohlschlegel, James A.
AU - Sachidanandam, Ravi
AU - Hannon, Gregory J.
AU - Brennecke, Julius
N1 - Funding Information:
Acknowledgements We thank R. Carthew, H. Siomi, P. Zamore and D. Smith for reagents. We are grateful to M. Rooks, E. Hodges and D. McCombie for help with deep sequencing. B.C. was supported by the German Academic Exchange Service. C.D.M. is a Beckman fellow of the Watson School of Biological Sciences and is supported by an NSF Graduate Research Fellowship. R.Z. is a Special Fellow of the Leukemia and Lymphoma Society. M.D. is an Engelhorn fellow of the Watson School of Biological Sciences. J.B. is supported by the Ernst Schering foundation. A.S. is supported by an HFSP fellowship. This work was supported in part from grants from the NIH to G.J.H. and N.P. and a gift from K. W. Davis (G.J.H.).
PY - 2008/6/5
Y1 - 2008/6/5
N2 - Drosophila endogenous small RNAs are categorized according to their mechanisms of biogenesis and the Argonaute protein to which they bind. MicroRNAs are a class of ubiquitously expressed RNAs of ∼22 nucleotides in length, which arise from structured precursors through the action of Drosha-Pasha and Dicer-1-Loquacious complexes. These join Argonaute-1 to regulate gene expression. A second endogenous small RNA class, the Piwi-interacting RNAs, bind Piwi proteins and suppress transposons. Piwi-interacting RNAs are restricted to the gonad, and at least a subset of these arises by Piwi-catalysed cleavage of single-stranded RNAs. Here we show that Drosophila generates a third small RNA class, endogenous small interfering RNAs, in both gonadal and somatic tissues. Production of these RNAs requires Dicer-2, but a subset depends preferentially on Loquacious rather than the canonical Dicer-2 partner, R2D2 (ref. 14). Endogenous small interfering RNAs arise both from convergent transcription units and from structured genomic loci in a tissue-specific fashion. They predominantly join Argonaute-2 and have the capacity, as a class, to target both protein-coding genes and mobile elements. These observations expand the repertoire of small RNAs in Drosophila, adding a class that blurs distinctions based on known biogenesis mechanisms and functional roles.
AB - Drosophila endogenous small RNAs are categorized according to their mechanisms of biogenesis and the Argonaute protein to which they bind. MicroRNAs are a class of ubiquitously expressed RNAs of ∼22 nucleotides in length, which arise from structured precursors through the action of Drosha-Pasha and Dicer-1-Loquacious complexes. These join Argonaute-1 to regulate gene expression. A second endogenous small RNA class, the Piwi-interacting RNAs, bind Piwi proteins and suppress transposons. Piwi-interacting RNAs are restricted to the gonad, and at least a subset of these arises by Piwi-catalysed cleavage of single-stranded RNAs. Here we show that Drosophila generates a third small RNA class, endogenous small interfering RNAs, in both gonadal and somatic tissues. Production of these RNAs requires Dicer-2, but a subset depends preferentially on Loquacious rather than the canonical Dicer-2 partner, R2D2 (ref. 14). Endogenous small interfering RNAs arise both from convergent transcription units and from structured genomic loci in a tissue-specific fashion. They predominantly join Argonaute-2 and have the capacity, as a class, to target both protein-coding genes and mobile elements. These observations expand the repertoire of small RNAs in Drosophila, adding a class that blurs distinctions based on known biogenesis mechanisms and functional roles.
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U2 - 10.1038/nature07007
DO - 10.1038/nature07007
M3 - Article
C2 - 18463631
AN - SCOPUS:44349104241
SN - 0028-0836
VL - 453
SP - 798
EP - 802
JO - Nature
JF - Nature
IS - 7196
ER -