At5g06940 Antibody

What is At5g06940 and why is it studied in plant research?

At5g06940 refers to a specific gene locus in Arabidopsis thaliana (Mouse-ear cress), a widely used model plant organism for molecular and genetic studies. This protein has been targeted for antibody development as part of efforts to understand protein localization and function in plant systems. The At5g06940 antibody is a polyclonal antibody raised against recombinant Arabidopsis thaliana At5g06940 protein, allowing researchers to detect and study this specific protein in various experimental contexts .

What are the basic specifications of commercially available At5g06940 antibodies?

The At5g06940 antibody is typically available as a polyclonal antibody raised in rabbits. According to current specifications, it is supplied as a liquid in a buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 as a preservative. The antibody is generally purified using antigen affinity methods, resulting in an IgG isotype antibody with specificity for Arabidopsis thaliana . The current lead time for production is approximately 14-16 weeks, as it is often made-to-order for specific research applications .

What applications is the At5g06940 antibody validated for?

The At5g06940 antibody has been validated for several research applications, primarily ELISA (Enzyme-Linked Immunosorbent Assay) and WB (Western Blot) techniques. These validations ensure proper identification of the target antigen . While not explicitly stated for this specific antibody, similar Arabidopsis antibodies have been successfully used for immunocytochemistry applications, allowing for subcellular and tissue-level localization studies .

How should At5g06940 antibody be stored and handled to maintain optimal activity?

For optimal preservation of antibody activity, the At5g06940 antibody should be stored at -20°C or -80°C upon receipt. Researchers should avoid repeated freeze-thaw cycles, as these can degrade antibody quality and reduce specificity . When working with the antibody, it is advisable to aliquot the stock solution into smaller volumes before freezing to minimize the number of freeze-thaw cycles. For short-term use during experiments, keeping the antibody on ice and using sterile techniques can help maintain its integrity.

What are the recommended protocols for using At5g06940 antibody in Western blot applications?

While specific protocols for At5g06940 antibody are not detailed in the search results, general methodological approaches for plant antibodies can be applied. Based on successful applications with similar Arabidopsis antibodies, researchers should:

• Extract proteins from plant tissue using appropriate buffers that maintain protein stability

• Separate proteins by SDS-PAGE (typically 10-12% gels)

• Transfer proteins to a membrane (PVDF or nitrocellulose)

• Block with 3-5% BSA or non-fat milk in TBST

• Incubate with primary At5g06940 antibody (typically at 1:1000 to 1:5000 dilution)

• Wash thoroughly with TBST

• Incubate with appropriate secondary antibody

• Develop using chemiluminescence or other detection methods

The expected molecular weight for the target protein should be verified against the predicted size to confirm specificity .

What methods are recommended for validating antibody specificity in Arabidopsis research?

Validation of antibody specificity is crucial for reliable research outcomes. For At5g06940 antibody, the following validation approaches are recommended:

• Mutant background testing: Compare antibody signal in wild-type plants versus null mutants lacking the target protein. Absence of signal in the mutant confirms specificity, as demonstrated with other Arabidopsis antibodies like LAX2, PIN1, PIN2, and AXR4 .

• Western blot analysis: Verify that the antibody detects a single band of the expected molecular weight. Multiple bands may indicate degradation, post-translational modifications, or cross-reactivity .

• Preabsorption controls: Incubate the antibody with purified target protein before immunostaining to confirm that this eliminates the signal.

• Comparison with tagged protein localization: Compare antibody staining patterns with fluorescently tagged versions of the same protein in transgenic plants .

What are common issues when working with plant antibodies and how can they be addressed?

Plant antibody research presents several common challenges that researchers should anticipate:

Affinity purification has been shown to significantly improve the detection rate of plant antibodies. In the CPIB antibody project, affinity purification increased the detection rate to 55% (38 out of 70 antibodies), with 22 antibodies being suitable for immunocytochemistry applications .

How can researchers determine optimal antibody dilutions for different applications?

Determining optimal antibody dilutions is critical for maximizing specific signal while minimizing background. For the At5g06940 antibody and similar plant antibodies, a systematic titration approach is recommended:

• For Western blot: Test a dilution series (e.g., 1:500, 1:1000, 1:2000, 1:5000) using the same amount of protein sample

• For immunocytochemistry: Test dilutions ranging from 1:50 to 1:500

• For ELISA: Typically start with 1:1000 and adjust based on signal-to-noise ratio

The optimal dilution provides the strongest specific signal with minimal background. Documentation from successful Arabidopsis antibody projects indicates that initial quality control using dot blots against recombinant proteins can detect target proteins in the picogram range, indicating good antibody titer .

What quality control measures should be implemented when receiving a new batch of At5g06940 antibody?

When receiving a new batch of At5g06940 antibody, implement these quality control measures:

• Dot blot analysis: Test antibody reactivity against purified recombinant protein at various concentrations to establish sensitivity limits

• Western blot validation: Verify that the antibody detects a protein of the expected molecular weight in wild-type samples

• Cross-reactivity testing: If possible, test antibody against samples from related species to assess specificity

• Batch comparison: If previous batches were used successfully, compare the new batch directly with the old batch using identical samples and protocols

• Aliquoting: Immediately aliquot the antibody to minimize freeze-thaw cycles and document batch information for reproducibility

How can At5g06940 antibody be used for subcellular localization studies?

For subcellular localization studies using At5g06940 antibody, researchers should:

• Prepare plant tissue samples through appropriate fixation (typically 4% paraformaldehyde)

• Perform antigen retrieval if necessary to expose epitopes

• Block with suitable buffers (often containing BSA, serum, and a detergent)

• Incubate with At5g06940 antibody at optimized dilution

• Apply fluorescently-labeled secondary antibodies

• Co-stain with established subcellular markers for reference

For co-localization studies, antibodies against standard organelle markers can be used simultaneously. The CPIB antibody project has developed several subcellular marker antibodies for Arabidopsis, including BiP (endoplasmic reticulum), γ-cop (golgi), PM-ATPase (plasma membrane), and MDH (plastid) . These markers facilitate precise determination of the subcellular localization of the target protein.

What approaches are recommended for studying protein-protein interactions involving At5g06940?

To investigate protein-protein interactions involving At5g06940, consider these advanced approaches:

• Co-immunoprecipitation (Co-IP): Use At5g06940 antibody to precipitate the protein complex from plant extracts, followed by Western blot analysis with antibodies against suspected interaction partners

• Proximity ligation assay (PLA): Combine At5g06940 antibody with antibodies against potential interaction partners to visualize protein-protein interactions in situ with single-molecule resolution

• ChIP applications: If At5g06940 is involved in DNA binding or chromatin regulation, chromatin immunoprecipitation (ChIP) with the antibody can identify DNA binding sites

Recent advances in protein complex antibody generation, as demonstrated in the study of BTLA-HVEM complexes, suggest that creating fusion proteins can enhance antibody production stability and enable direct measurement of protein complexes on live cells .

How can quantitative analysis be performed using At5g06940 antibody?

For quantitative analysis of At5g06940 protein levels in different tissues or conditions:

• Quantitative Western blotting: Use serial dilutions of recombinant protein as standards, ensuring signal is in the linear range of detection

• ELISA quantification: Develop a sandwich ELISA using the At5g06940 antibody as either capture or detection antibody, with standard curves for absolute quantification

• Immunofluorescence quantification: Use consistent imaging parameters and quantify fluorescence intensity with appropriate software, including normalization to internal standards

• Tissue-specific expression mapping: Systematically analyze expression patterns across different root cell types and developmental zones to create an expression atlas, as done in the CPIB project for other Arabidopsis proteins

How should researchers interpret contradictory results between antibody-based detection and transcript analysis?

When faced with discrepancies between protein detection using At5g06940 antibody and transcript-level data (e.g., RNA-seq, qRT-PCR), consider:

• Post-transcriptional regulation: Differences may reflect genuine biological regulation occurring after transcription, including translation efficiency, protein stability, or degradation

• Technical limitations: Antibody sensitivity limits may prevent detection of low-abundance proteins despite high transcript levels

• Temporal dynamics: Transcript and protein abundance may peak at different times due to delays between transcription and translation

• Protein modifications: Post-translational modifications might affect antibody recognition without changing transcript levels

• Validation approach: Implement multiple detection methods, including fluorescent protein fusions, to resolve contradictions

What are the best practices for reporting antibody-based experimental results in publications?

When publishing research using At5g06940 antibody, adhere to these reporting standards:

• Complete antibody documentation: Include catalog number, lot number, supplier, host species, clonality, and immunogen information

• Validation evidence: Describe all validation experiments performed, including controls and mutant background testing

• Detailed methodology: Provide comprehensive protocols including dilutions, incubation times, blocking conditions, and detection methods

• Quantification methods: Clearly explain any quantitative analyses performed, including software used and statistical approaches

• Raw data availability: Consider providing original, unprocessed blot/image data in supplementary materials or repositories

• Reproducibility considerations: Acknowledge batch effects and other factors that might affect reproducibility

How can At5g06940 antibody be integrated into multi-omics research approaches?

Integrating At5g06940 antibody-based research into multi-omics studies requires:

• Coordinated sample preparation: Design experiments to allow parallel isolation of proteins, RNA, metabolites, and other biomolecules from the same samples

• Time-course analyses: Align antibody-based protein detection with transcriptomic and metabolomic time points to capture regulatory dynamics

• Data integration frameworks: Use computational methods to integrate antibody-based protein localization or quantification with other omics datasets

• Systems biology modeling: Incorporate protein localization and interaction data into pathway models and protein regulatory networks

This integration supports a holistic understanding of protein function and role in cell and tissue dynamics, as emphasized in the post-genomics era of plant research .