期刊
EMBO JOURNAL
卷 21, 期 9, 页码 2139-2148出版社
WILEY
DOI: 10.1093/emboj/21.9.2139
关键词
polyadenylation; protein phosphorylation; synapse; translation
资金
- NINDS NIH HHS [P01 NS039321, NS 39321] Funding Source: Medline
Activity-dependent local translation of dendritic mRNAs is one process that underlies synaptic plasticity. Here, we demonstrate that several of the factors known to control polyadenylation-induced translation in early vertebrate development [cytoplasmic polyadenylation element-binding protein (CPEB), maskin, poly(A) polymerase, cleavage and polyadenylation specificity factor (CPSF) and Aurora] also reside at synaptic sites of rat hippocampal neurons. The induction of polyadenylation at synapses is mediated by the N-methyl-d-aspartate (NMDA) receptor, which transduces a signal that results in the activation of Aurora kinase. This kinase in turn phosphorylates CPEB, an essential RNA-binding protein, on a critical residue that is necessary for polyadenylation-induced translation. These data demonstrate a remarkable conservation of the regulatory machinery that controls signal-induced mRNA translation, and elucidates an axis connecting the NMDA receptor to localized protein synthesis at synapses.
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