Journal
SCIENCE
Volume 367, Issue 6477, Pages 526-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aay4991
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Funding
- EMBO long-term postdoctoral fellowship [EMBO ALTF 331-2017]
- Max Planck Society
- European Research Council [743216]
- DFG [CRC 1080, CRC 902]
- European Research Council (ERC) [743216] Funding Source: European Research Council (ERC)
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To accommodate their complex morphology, neurons localize messenger RNAs (mRNAs) and ribosomes near synapses to produce proteins locally. However, a relative paucity of polysomes (considered the active sites of translation) detected in electron micrographs of neuronal processes has suggested a limited capacity for local protein synthesis. In this study, we used polysome profiling together with ribosome footprinting of microdissected rodent synaptic regions to reveal a surprisingly high number of dendritic and/or axonal transcripts preferentially associated with monosomes (single ribosomes). Furthermore, the neuronal monosomes were in the process of active protein synthesis. Most mRNAs showed a similar translational status in the cell bodies and neurites, but some transcripts exhibited differential ribosome occupancy in the compartments. Monosome-preferring transcripts often encoded high-abundance synaptic proteins. Thus, monosome translation contributes to the local neuronal proteome.
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