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UNC-6/netrin and its receptor UNC-5 locally exclude presynaptic components from dendrites
- Source :
- Nature. 455(7213)
- Publication Year :
- 2008
-
Abstract
- Polarity is an essential feature of many cell types, including neurons that receive information from local inputs within their dendrites and propagate nerve impulses to distant targets through a single axon. It is generally believed that intrinsic structural differences between axons and dendrites dictate the polarized localization of axonal and dendritic proteins1. However, whether extra-cellular cues also instruct this process in vivo has not been explored. Here we show that the axon guidance cue UNC-6/netrin and its receptor UNC-5 act throughout development to exclude synaptic vesicle and active zone proteins from the dendrite of the Caenorhabditis elegans motor neuron DA9, which is proximal to a source of UNC-6/netrin. In unc-6/netrin and unc-5 loss-of-function mutants, presynaptic components mislocalize to the DA9 dendrite. In addition, ectopically expressed UNC-6/netrin, acting through UNC-5, is sufficient to exclude endogenous synapses from adjacent subcellular domains within the DA9 axon. Furthermore, this anti-synaptogenic activity is interchangeable with that of LIN-44/Wnt despite being transduced through different receptors, suggesting that extracellular cues such as netrin and Wnts not only guide axon navigation but also regulate the polarized accumulation of presynaptic components through local exclusion.
- Subjects :
- rab3 GTP-Binding Proteins
Presynaptic Terminals
Dendrite
Nerve Tissue Proteins
Receptors, Cell Surface
Biology
Synaptic vesicle
Article
Synapse
Netrin
medicine
Animals
Active zone
Axon
Caenorhabditis elegans
Caenorhabditis elegans Proteins
Glycoproteins
Multidisciplinary
fungi
Wnt signaling pathway
Membrane Proteins
Dendrites
Cell biology
Wnt Proteins
medicine.anatomical_structure
nervous system
Mutation
Synapses
Axon guidance
Netrins
Netrin Receptors
Subjects
Details
- ISSN :
- 14764687
- Volume :
- 455
- Issue :
- 7213
- Database :
- OpenAIRE
- Journal :
- Nature
- Accession number :
- edsair.doi.dedup.....6227679f9ecf5288a7d88db398a9e80f