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    Science. 2002 Mar 29;295(5564):2456-9. Epub 2002 Feb 7.

    Systemic RNAi in C. elegans requires the putative transmembrane protein SID-1.

    Winston WM, Molodowitch C, Hunter CP.

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    Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA.

    Abstract

    Double-stranded RNA-mediated gene interference (RNAi) in Caenorhabditis elegans systemically inhibits gene expression throughout the organism. To investigate how gene-specific silencing information is transmitted between cells, we constructed a strain that permits visualization of systemic RNAi. We used this strain to identify systemic RNA interference-deficient (sid) loci required to spread gene-silencing information between tissues but not to initiate or maintain an RNAi response. One of these loci, sid-1, encodes a conserved protein with predicted transmembrane domains. SID-1 is expressed in cells sensitive to RNAi, is localized to the cell periphery, and is required cell-autonomously for systemic RNAi.

    PMID:
    11834782
    [PubMed - indexed for MEDLINE]

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