rig-3 Antibody
Description
Molecular Characterization of RIG-3
RIG-3 is a glycosylphosphatidylinositol (GPI)-anchored protein expressed in neurons. Key features include:
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Domain structure: Immunoglobulin (Ig) domains and fibronectin type III (FNIII) repeats.
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Function: Modulates acetylcholine receptor (AChR) clustering at neuromuscular junctions (NMJs) and regulates Wnt signaling via interactions with CAM-1, a Ror-type receptor tyrosine kinase .
Role in Synaptic Plasticity
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Aldicarb hypersensitivity: rig-3 mutants exhibit heightened sensitivity to aldicarb, a cholinesterase inhibitor, due to increased AChR density at NMJs .
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Post-synaptic potentiation: RIG-3 loss amplifies endogenous excitatory postsynaptic currents (EPSCs) and exogenous ACh-activated currents in body-wall muscles .
Regulation of Wnt Signaling
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CAM-1 inhibition: RIG-3 binds CAM-1 to suppress Wnt ligand activity, maintaining neuronal polarity and synaptic stability .
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Phenotypic rescue: Expression of RIG-3 in cholinergic neurons restores normal aldicarb sensitivity and AChR levels in mutants .
Experimental Use of RIG-3 Antibodies
Though not commercially available, custom antibodies have been critical in:
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Localization studies: Immunostaining confirmed RIG-3 expression in C. elegans motor neurons and ALM mechanosensory neurons .
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Functional assays: Antibodies validated RIG-3’s GPI anchoring and its role in ribosome assembly during Nf-κb1 mRNA translation .
Comparative Analysis of rig-3 Mutants vs. Wild Type
| Parameter | Wild Type | rig-3 Mutant |
|---|---|---|
| Aldicarb sensitivity | Normal | Hypersensitive |
| Muscle AChR density | Baseline | Increased |
| Neuronal polarity defects | Absent | Present |
| Wnt signaling activity | Regulated | Hyperactive |
Implications for Human Biology
While RIG-3 is not directly conserved in mammals, its regulatory mechanisms offer insights into:
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Neurodegenerative diseases: Dysregulated synaptic plasticity in Alzheimer’s and Parkinson’s .
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Cancer metastasis: Wnt signaling pathways targeted by RIG-3 homologs .
Limitations and Future Directions
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- RIG-3 inhibits Wnt/LIN-44 signaling through interaction with CAM-1. PMID: 28515212
- Studies indicate that RIG-3 regulates Wnt signaling and exhibits an anti-plasticity function, preventing activity-dependent alterations in postsynaptic receptor fields. PMID: 21745641
