IAA5 Antibody
Description
Biological Role of IAA5
IAA5 acts as a transcriptional repressor in auxin signaling by interacting with Auxin Response Factors (ARFs). Key findings include:
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DNA Damage Response: IAA5 is locally induced in Arabidopsis root vascular stem cells under DNA stress (e.g., bleomycin treatment), promoting stem cell death to maintain genome integrity .
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Auxin Signaling Modulation:
IAA5 Antibody Applications
While no studies directly describe the IAA5 antibody, its inferred uses based on related research include:
Genetic and Molecular Insights
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Induction Dynamics:
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Mutant Phenotypes:
Interaction Partners
Technical Considerations
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Antibody Validation:
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Experimental Systems:
Research Gaps and Future Directions
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Antibody Development: No peer-reviewed studies explicitly describe IAA5 antibody generation or validation.
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Translational Potential:
Product Specs
**Constituents:** 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
Q&A
Basic Research Questions
What experimental methods are most reliable for detecting IAA5 protein dynamics in Arabidopsis?
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Western blotting with validated IAA5-specific antibodies is the gold standard for quantifying protein levels. Include controls such as iaa5 knockout mutants to confirm antibody specificity.
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Immunoprecipitation (IP) coupled with mass spectrometry identifies IAA5 interaction partners (e.g., ARF10/16) under auxin treatment or stress conditions .
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Cycloheximide chase assays assess IAA5 protein stability. For example, IAA5 degradation occurs within 30 minutes of auxin treatment, which is delayed by proteasome inhibitors like MG132 .
How do I design a genetic study to validate IAA5 function in auxin signaling?
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Use double mutants (e.g., iaa5 iaa29) to bypass functional redundancy .
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Employ tissue-specific promoters (e.g., WOL for vascular stem cells) to express stabilized IAA5 variants (e.g., IAA5) and observe phenotypic rescue .
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Combine with transcriptional reporters (e.g., DR5::LUC) to monitor auxin response dynamics .
Advanced Research Questions
How does IAA5 coordinate with non-canonical AUX/IAA proteins like IAA33 in regulating ARF activity?
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Competitive binding assays: In vitro pull-downs show IAA33 reduces IAA5-ARF10/16 interactions by 60–80%, suggesting direct competition .
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Yeast three-hybrid systems demonstrate that co-expression of IAA33 blocks IAA5-ARF binding, while IAA5 does not reciprocally inhibit IAA33-ARF interactions .
Table 1: Key interactions between IAA5, IAA33, and ARFs
How to resolve contradictions in IAA5’s role during DNA damage responses?
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Temporal analysis: IAA5 transcript levels rise within 6 hours of DNA damage (e.g., bleomycin treatment), preceding stem cell death at 12–18 hours . Use time-course qRT-PCR and PI staining to correlate expression with phenotype.
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Tissue-specific mutants: sog1-101 knockout abolishes IAA5 induction, confirming dependence on the SOG1 transcription factor .
What controls are critical when studying IAA5-antibody specificity in cross-species studies?
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Epitope mapping: Validate antibody reactivity against conserved domains (e.g., Domain II in IAA5) using peptide arrays.
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Phylogenetic analysis: Test antibody cross-reactivity with AUX/IAA homologs in closely related species (e.g., Brassica).
Methodological Best Practices
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Quantitative thresholds: For auxin-treated samples, define degradation kinetics (e.g., IAA5 half-life <30 minutes) .
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Stress-specific controls: Include non-DNA-damaging stressors (e.g., salt, heat) to isolate IAA5’s role in genome integrity .
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Data normalization: Use housekeeping genes like ACTIN2 for qRT-PCR and Coomassie staining for Western blots to account for loading variability.
