FMRP stalls ribosomal translocation on mRNAs linked to synaptic function and autism.
FMRP stalls ribosomal translocation on mRNAs linked to synaptic function and autism.
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DOI:
10.1016/j.cell.2011.06.013
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发表时间:
2011-07-22
期刊:
影响因子:
64.5
通讯作者:
Darnell RB
中科院分区:
文献类型:
--
作者:
Darnell JC;Van Driesche SJ;Zhang C;Hung KY;Mele A;Fraser CE;Stone EF;Chen C;Fak JJ;Chi SW;Licatalosi DD;Richter JD;Darnell RB
FMRP loss-of-function causes Fragile X Syndrome (FXS) and autistic features. FMRP is a polyribosome-associated neuronal RNA-binding protein, suggesting that it plays a key role in regulating neuronal translation, but there has been little consensus regarding either its RNA targets or mechanism of action. Here we use high throughput sequencing of RNAs isolated by crosslinking immunoprecipitation (HITS-CLIP) to identify FMRP interactions with mouse brain polyribosomal mRNAs. FMRP interacts with the coding region of transcripts encoding pre- and postsynaptic proteins, and transcripts implicated in autism spectrum disorders (ASD). We developed a brain polyribosome-programmed translation system, revealing that FMRP reversibly stalls ribosomes specifically on its target mRNAs. Our results indicate that loss of a translational brake on the synthesis of a subset of synaptic proteins may contribute to FXS. In addition, they provide insight into the molecular basis of the cognitive and allied defects in FXS and ASD, and suggest multiple targets for clinical intervention.
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