unc-1 Antibody
Description
Biological Context of UNC-1
UNC-1 is a stomatin-like protein (SLP) identified in C. elegans through genetic screens for uncoordinated locomotion . It modulates electrical coupling between body-wall muscle cells by interacting with UNC-9, a gap junction protein . Mutations in unc-1 or unc-9 result in similar defects, including reduced locomotion and altered anesthetic sensitivity .
Key Research Applications of the UNC-1 Antibody
The UNC-1 antibody has been instrumental in:
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Localizing UNC-1 expression: Immunohistochemistry revealed UNC-1 is expressed in body-wall muscle cells, vulval muscle, and neurons, overlapping with UNC-9 expression .
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Functional studies: Demonstrating that UNC-1 regulates UNC-9-based gap junctions without affecting UNC-9 protein localization .
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Genetic interaction assays: Confirming that unc-1 and unc-9 mutants exhibit similar defects in electrical coupling .
Electrical Coupling Defects
Junctional currents (I<sub>j</sub>) between body-wall muscle cells were measured using dual voltage clamp techniques:
| Genotype | Junctional Current (I<sub>j</sub>) Reduction | Citation |
|---|---|---|
| Wild-type | 0% | |
| unc-1(e719) | ~70% | |
| unc-9(lf) | ~70% | |
| unc-1;unc-9 | ~70% |
This table shows that both unc-1 and unc-9 loss-of-function mutations disrupt electrical coupling to the same extent, suggesting a cooperative role .
Subcellular Localization
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UNC-1::HA fusion proteins localized to body-wall muscle junctions and neuronal tracts, consistent with UNC-9 expression patterns .
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UNC-9 immunostaining remained unchanged in unc-1 mutants, indicating UNC-1 does not regulate UNC-9 localization but modulates its function .
Implications for Neuromuscular Research
UNC-1’s role in gap junction regulation provides insights into:
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Locomotion mechanisms: Defective UNC-1/UNC-9 interactions disrupt coordinated muscle contractions .
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Anesthetic sensitivity: unc-1 mutants exhibit altered responses to volatile anesthetics, linking gap junctions to neuronal signaling .
Future Directions
Further studies could explore:
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UNC-1’s kinase-dependent regulatory mechanisms.
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Broader roles of SLPs in gap junction modulation across species.
Product Specs
Composition: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- Mutations in the *unc-24* gene alter the distribution of UNC-1 in lipid rafts. PMID: 15102610
- Homologues of Hyperkinetic and K channel regulator 1 proteins interact with and modify *unc-103* function; the effects of mutations on function and physiology are described. PMID: 15280551
- Targeted rescue experiments indicate that UNC-9 and UNC-1 function predominantly in neurons to regulate locomotion. PMID: 17658257
