Live cell imaging reveals 3′-UTR dependent mRNA sorting to synapses

Karl E. Bauer, Inmaculada Segura, Imre Gaspar, Volker Scheuss, Christin Illig, Georg Ammer, Saskia Hutten, Eugénia Basyuk, Sandra M. Fernández-Moya, Janina Ehses, Edouard Bertrand and Michael A. Kiebler ()
Additional contact information
Karl E. Bauer: Ludwig Maximilians University
Inmaculada Segura: Ludwig Maximilians University
Imre Gaspar: EMBL
Volker Scheuss: Ludwig Maximilians University
Christin Illig: Ludwig Maximilians University
Georg Ammer: Ludwig Maximilians University
Saskia Hutten: Ludwig Maximilians University
Eugénia Basyuk: CNRS UMR5535, Université de Montpellier
Sandra M. Fernández-Moya: Ludwig Maximilians University
Janina Ehses: Ludwig Maximilians University
Edouard Bertrand: CNRS UMR5535, Université de Montpellier
Michael A. Kiebler: Ludwig Maximilians University

Nature Communications, 2019, vol. 10, issue 1, 1-13

Abstract: Abstract mRNA transport restricts translation to specific subcellular locations, which is the basis for many cellular functions. However, the precise process of mRNA sorting to synapses in neurons remains elusive. Here we use Rgs4 mRNA to investigate 3′-UTR-dependent transport by MS2 live-cell imaging. The majority of observed RNA granules display 3′-UTR independent bidirectional transport in dendrites. Importantly, the Rgs4 3′-UTR causes an anterograde transport bias, which requires the Staufen2 protein. Moreover, the 3′-UTR mediates dynamic, sustained mRNA recruitment to synapses. Visualization at high temporal resolution enables us to show mRNA patrolling dendrites, allowing transient interaction with multiple synapses, in agreement with the sushi-belt model. Modulation of neuronal activity by either chemical silencing or local glutamate uncaging regulates both the 3′-UTR-dependent transport bias and synaptic recruitment. This dynamic and reversible mRNA recruitment to active synapses would allow translation and synaptic remodeling in a spatially and temporally adaptive manner.

Date: 2019
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DOI: 10.1038/s41467-019-11123-x

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