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Updated: Jun 26, 2026

In vivo and in vitro Studies of Adaptor-clathrin Interaction
Published on: January 26, 2011
Clathrin adaptor AP-1 complex excludes multiple postsynaptic receptors from axons in C. elegans.
Milica A Margeta1, George J Wang, Kang Shen
1Howard Hughes Medical Institute and Department of Biology, Stanford University, 144 Herrin Labs, Stanford, CA 94305-5020, USA.
The AP-1 complex subunit UNC-101 is crucial for directing neurotransmitter receptors to dendrites in C. elegans neurons. Its axonal localization suggests a transcytosis mechanism for receptor targeting.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Neurons exhibit distinct axonal and dendritic compartments, but mechanisms for postsynaptic receptor enrichment are unclear.
- Understanding how receptors are targeted to specific neuronal compartments is vital for synaptic function.
Purpose of the Study:
- Investigate the molecular mechanisms underlying the dendritic polarization of glutamate, acetylcholine, and ROR-type receptor tyrosine kinases.
- Determine the role of the clathrin adaptor AP-1 complex mu1 subunit (UNC-101) in receptor localization in C. elegans RIA interneurons.
Main Methods:
- Utilized C. elegans as a model organism.
- Examined receptor localization in wild-type and unc-101 mutant strains.
- Investigated the role of dynamin in receptor trafficking.
Main Results:
- UNC-101 functions cell-autonomously to ensure correct dendritic localization of multiple receptor types.
- In unc-101 mutants, receptors are evenly distributed between axonal and dendritic compartments.
- UNC-101 predominantly localizes to the axonal compartment, unlike the receptors it regulates.
Conclusions:
- The AP-1 complex subunit UNC-101 is essential for the polarized localization of postsynaptic receptors.
- Axonal localization of UNC-101 suggests a potential transcytosis pathway for dendritic receptor targeting.
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