Specialized piRNA Pathways Act in Germline and Somatic Tissues of the Drosophila Ovary

Malone, C. D., Brennecke, J., Dus, M., Stark, A., McCombie, W. R., Sachidanandam, R., Hannon, G. J. (2009) Specialized piRNA Pathways Act in Germline and Somatic Tissues of the Drosophila Ovary. Cell, 137 (3). 522-535 . ISSN 0092-8674

URL: http://www.ncbi.nlm.nih.gov/pubmed/19395010
DOI: 10.1016/j.cell.2009.03.040

Abstract

Summary In Drosophila gonads, Piwi proteins and associated piRNAs collaborate with additional factors to form a small RNA-based immune system that silences mobile elements. Here, we analyzed nine Drosophila piRNA pathway mutants for their impacts on both small RNA populations and the subcellular localization patterns of Piwi proteins. We find that distinct piRNA pathways with differing components function in ovarian germ and somatic cells. In the soma, Piwi acts singularly with the conserved flamenco piRNA cluster to enforce silencing of retroviral elements that may propagate by infecting neighboring germ cells. In the germline, silencing programs encoded within piRNA clusters are optimized via a slicer-dependent amplification loop to suppress a broad spectrum of elements. The classes of transposons targeted by germline and somatic piRNA clusters, though not the precise elements, are conserved among Drosophilids, demonstrating that the architecture of piRNA clusters has coevolved with the transposons that they are tasked to control.

Item Type: Paper
Uncontrolled Keywords: RNA DEVBIO devbio DNA
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > Piwi protein
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > piRNA
CSHL Authors:
Communities: CSHL labs > Hannon lab
CSHL labs > McCombie lab
CSHL labs > Sachidanandam lab
Watson School > Publications
Depositing User: Editor Margaret Fantz
Date Deposited: 17 Apr 2012 17:13
Last Modified: 22 Sep 2014 18:31
PMCID: PMC2882632
Related URLs:
URI: http://repository.cshl.edu/id/eprint/26120

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