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Mechanisms of dendritic mRNA transport and its role in synaptic tagging
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Journal Article
Mechanisms of dendritic mRNA transport and its role in synaptic tagging
2011
Overview
The localization of RNAs critically contributes to many important cellular processes in an organism, such as the establishment of polarity, asymmetric division and migration during development. Moreover, in the central nervous system, the local translation of mRNAs is thought to induce plastic changes that occur at synapses triggered by learning and memory. Here, we will critically review the physiological functions of well‐established dendritically localized mRNAs and their associated factors, which together form ribonucleoprotein particles (RNPs). Second, we will discuss the life of a localized transcript from transcription in the nucleus to translation at the synapse and introduce the concept of the ‘
RNA signature
’ that is characteristic for each transcript. Finally, we present the ‘
sushi belt model
’ of how localized RNAs within neuronal RNPs may dynamically patrol multiple synapses rather than being anchored at a single synapse. This new model integrates our current understanding of synaptic function ranging from synaptic tagging and capture to functional and structural reorganization of the synapse upon learning and memory.
In this review, our understanding of the mechanisms and regulation of dendritic mRNA localization is synthesized into a ‘sushi belt’ model of mRNA transport and translational control in neurons.
Publisher
John Wiley & Sons, Ltd,Nature Publishing Group UK,Springer Nature B.V,Nature Publishing Group
