ARGONAUTE1 is required for efficient RNA interference in Drosophila embryos

被引:142
作者
Williams, RW
Rubin, GM
机构
[1] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA
关键词
D O I
10.1073/pnas.072190799
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Double-stranded RNA (dsRNA) triggers homology-dependent post-transcriptional gene interference (RNAi) in a diverse range of eukaryotic organisms, in a process mechanistically related to viral and transgene-mediated cosuppression. RNAi is characterized by the conversion of long dsRNA into approximate to21-25-nt small interfering RNAs (siRNA) that guide the degradation of homologous mRNA. Many of the genes required for siRNA production and target mRNA degradation are widely conserved. Notably, members of the Argonaute-like gene family from Arabidopsis, Caenorhabditis elegans, Drosophila, and Neurospora have been genetically and/or biochemically identified as components of the RNAi/cosuppression pathway. We show here that mutations in the Drosophila Argonaute1 (AGO1) gene suppress RNAi in embryos. This defect corresponds to a reduced ability to degrade mRNA in response to dsRNA in vitro. Furthermore, AGO1 is not required for siRNA production in vitro nor can the introduction of siRNA bypass AGO1 mutants in vivo. These data suggest that AGO1 functions downstream of siRNA production.
引用
收藏
页码:6889 / 6894
页数:6
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