twk-18 Antibody
Description
Antibodies Targeting Homologous Proteins
While TWK-18-specific antibodies are not explicitly described, human homolog KCNK18 (TWIK-related spinal cord K+ channel) has commercially available antibodies:
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Anti-KCNK18 Applications:
Comparative Table: TWK-18 vs. KCNK18
Research Techniques for TWK-18 Analysis
Studies on TWK-18 primarily use genetic and electrophysiological methods:
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Promoter-GFP fusion: Visualized TWK-18 expression in body wall muscle .
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Xenopus oocyte expression: Demonstrated enhanced currents in mutant channels (e.g., M280I) .
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Biolayer interferometry (BLI): Measured binding affinity of regulatory proteins (e.g., IL-18BP in unrelated studies) .
Functional Insights from Mutant Studies
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Paralysis Mechanism: Gain-of-function mutants (e.g., twk-18(cn110)) cause hyperpolarization of muscle cells, leading to movement defects .
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Reversion Studies: Partial revertants like twk-18(sa589) restored viability but not mobility, confirming gene-specific effects .
Implications for Antibody Development
Though direct TWK-18 antibodies are uncharacterized, lessons from IL-18BP antibody development highlight:
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Neutralizing vs. Non-neutralizing clones: Antibody 445 disrupted IL-18BP/IL-18 complexes, while 441 did not, despite similar binding affinities .
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Therapeutic potential: Neutralizing antibodies can modulate ion channel activity or cytokine pathways (e.g., IL-18BP in inflammation) .
Limitations and Future Directions
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Gaps: No structural or epitope data exist for TWK-18-specific antibodies.
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Opportunities: Cross-reactive antibodies targeting conserved domains in KCNK18 could aid in functional studies of TWK-18 homologs.
Product Specs
Constituents: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
Target Background
Q&A
Basic Research Questions
What experimental validation methods are essential for confirming TWK-18 antibody specificity?
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Western blotting: Validate using lysates from C. elegans mutants (e.g., twk-18 paralytics) and wild-type controls to confirm band size (~45-48 kDa) and absence of cross-reactivity .
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Immunofluorescence: Localize TWK-18 in C. elegans body wall muscle using promoter-GFP fusion controls to verify subcellular targeting .
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Functional assays: Express TWK-18 in heterologous systems (e.g., Xenopus oocytes) and compare potassium current magnitudes between wild-type and mutant channels .
How does sample preparation affect TWK-18 antibody performance?
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Native vs. denatured conditions: TWK-18 antibodies may require non-reduced samples to preserve conformational epitopes (e.g., temperature-sensitive channel domains) .
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Fixation: For immunohistochemistry, avoid formaldehyde-induced epitope masking; use antigen retrieval methods if necessary .
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Controls: Include twk-18 knockout strains or RNAi-treated samples to rule out nonspecific binding .
What criteria define a high-quality TWK-18 antibody for basic research?
Advanced Research Questions
How can epitope mapping resolve contradictory data in TWK-18 studies?
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Strategy: Use synthetic peptides spanning TWK-18 domains (e.g., 323S–340G vs. 381R–397D) to map binding regions via competitive ELISA .
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Case example: Commercial antibodies targeting 387E–396D may fail to detect conformational changes, while custom monoclonals (e.g., K18-624) show 8× higher sensitivity due to epitope accessibility .
What methodologies address cross-species reactivity challenges?
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Phage display libraries: Screen TWK-18 homologs (e.g., human K2P channels) to identify cross-reactive clones .
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Dual-color assays: Compare signal ratios in C. elegans vs. mammalian cell lysates using Cy3/Cy5-labeled secondaries to quantify specificity .
What strategies validate TWK-18 antibodies in disease models?
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Murine MAS models: Test antibody neutralization efficacy in IL-18BP-KO systems .
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Electrophysiology: Correlate antibody-blocking effects with K+ current modulation in Xenopus oocytes .
Data Conflict Resolution
How to interpret discrepant Western blot results for TWK-18?
Can TWK-18 antibodies be integrated into multiplexed proteomic workflows?
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Dual-labeling: Pair with anti-UNC-54 (myosin) in C. elegans using species-specific secondaries (e.g., anti-mouse Cy5 + anti-rabbit Cy3) .
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Data normalization: Use spike-in controls (e.g., recombinant TWK-18) to correct for batch effects .
