At4g18490 Antibody

What is At4g18490 and why is it significant in plant research?

At4g18490 is a gene locus in Arabidopsis thaliana (mouse-ear cress), a model organism widely used in plant molecular biology. The gene encodes a protein that remains largely uncharacterized but appears to be conserved across plant species, including in Nelumbo nucifera (sacred lotus) where a homologous protein has been identified . The conservation across species suggests potential functional importance in plant biology, making it a target of interest for researchers studying fundamental plant cellular processes.

What organism sources are available for At4g18490 antibodies?

At4g18490 antibodies are primarily raised against the Arabidopsis thaliana protein. Commercial antibodies like CSB-PA323677XA01DOA are typically generated using recombinant Arabidopsis thaliana At4g18490 protein as the immunogen and are raised in rabbits . These antibodies are designed to specifically detect the At4g18490 protein in Arabidopsis thaliana samples, though cross-reactivity with homologous proteins in closely related species may occur.

What are the storage requirements for At4g18490 antibodies?

At4g18490 antibodies should be stored at -20°C or -80°C upon receipt. Repeated freeze-thaw cycles should be avoided to maintain antibody integrity and functionality . Many commercial preparations come in liquid form with 50% glycerol and preservatives such as 0.03% Proclin 300 in PBS (pH 7.4) to improve stability . Always refer to the manufacturer's specific storage recommendations for optimal results.

How should researchers validate the specificity of At4g18490 antibodies?

Validation of At4g18490 antibodies should include:

• Western blot analysis using both wild-type plant tissue and At4g18490 mutant/knockout lines as controls

• Immunoprecipitation followed by mass spectrometry to confirm target binding

• Preabsorption tests with the recombinant immunogen protein to demonstrate specificity

• Cross-reactivity testing with closely related proteins or tissues from different plant species

• Comparison of results with alternative antibodies against the same target if available

This multi-approach validation ensures the antibody specifically recognizes At4g18490 and not other proteins, critical for accurate data interpretation.

What forms of At4g18490 antibody are available for research applications?

At4g18490 antibodies are typically available as affinity-purified polyclonal antibodies . The purification method usually involves antigen affinity chromatography to ensure high specificity for the target protein. These antibodies are generally supplied in liquid form in a storage buffer containing glycerol and preservatives. Most commercially available At4g18490 antibodies are non-conjugated, allowing researchers flexibility in selecting secondary detection methods appropriate for their specific applications.

What is the typical lead time for custom At4g18490 antibody production?

Custom At4g18490 antibody production typically requires 14-16 weeks . This extended timeframe accounts for:

• Immunogen preparation (recombinant protein expression and purification)

• Animal immunization protocol (multiple injections over several weeks)

• Serum collection and antibody purification

• Quality control testing and validation

Researchers should plan experiments accordingly, particularly for time-sensitive projects requiring these antibodies.

What are the validated research applications for At4g18490 antibodies?

At4g18490 antibodies have been validated for applications including ELISA and Western blot (WB) . The antibody can be used to detect the native protein in plant tissue lysates, providing insights into protein expression levels and potential post-translational modifications. Additional applications may include immunoprecipitation for protein interaction studies, though explicit validation for these applications would be required before experimental implementation.

How should sample preparation be optimized for At4g18490 detection in Western blots?

For optimal At4g18490 detection in Western blots:

• Tissue selection: Use appropriate developmental stages and tissue types where At4g18490 is expected to be expressed

• Extraction buffer optimization:

  • Include protease inhibitors to prevent degradation

  • Use phosphatase inhibitors if phosphorylation status is relevant

  • Consider detergent concentration based on protein solubility (typically 0.1-1% Triton X-100 or NP-40)

• Protein loading: 20-50 μg total protein per lane is typically sufficient

• Blocking optimization: Test both BSA and non-fat milk-based blocking solutions

• Antibody dilution: Begin with 1:1000 dilution and optimize as needed

• Extended primary antibody incubation (overnight at 4°C) often improves signal quality

These optimizations maximize detection sensitivity while reducing background interference.

What considerations are important when using At4g18490 antibodies in proximity labeling experiments?

When incorporating At4g18490 antibodies in proximity labeling experiments such as TurboID-based approaches :

• Validate antibody specificity in the presence of biotinylated proteins

• Include appropriate controls (non-biotinylated samples and samples expressing only the biotin ligase)

• Optimize biotin concentration and incubation time to reduce background

• Consider potential interference between biotinylation and epitope recognition

• For mass spectrometry analysis following proximity labeling, include stringent filtering conditions to exclude endogenous biotinylated proteins and non-specific binding to streptavidin beads

These considerations help ensure that the antibody specifically detects At4g18490 in complex samples containing numerous biotinylated proteins.

How can researchers address weak or absent signal when using At4g18490 antibodies?

When encountering weak or absent signals with At4g18490 antibodies:

• Verify protein expression: Confirm At4g18490 expression in your experimental conditions and tissue types

• Increase protein concentration: Load more total protein (up to 100 μg if necessary)

• Optimize antibody concentration: Test higher antibody concentrations (1:500 or 1:250)

• Extend incubation times: Consider overnight primary antibody incubation at 4°C

• Modify extraction conditions: Test different lysis buffers that may better preserve the epitope

• Enhance detection: Use more sensitive detection methods (ECL Plus instead of standard ECL)

• Check protein transfer: Confirm efficient transfer using reversible protein staining of membranes

• Verify antibody functionality: Test the antibody with positive control samples (e.g., recombinant At4g18490)

Systematic troubleshooting can help determine whether the issue is technical or biological in nature.

How should researchers interpret multiple bands in Western blots using At4g18490 antibodies?

Multiple bands in Western blots may indicate:

• Post-translational modifications (phosphorylation, glycosylation, etc.)

• Alternative splice variants of At4g18490

• Protein degradation products

• Cross-reactivity with related proteins

• Non-specific binding

To differentiate between these possibilities:

• Compare observed band sizes with predicted molecular weights of known variants

• Include appropriate positive and negative controls (knockout lines if available)

• Perform peptide competition assays to identify specific versus non-specific bands

• Use specific inhibitors of post-translational modifications to confirm band identity

• Consider subcellular fractionation to determine if different bands represent different localizations

Careful analysis of multiple bands can provide valuable insights into protein processing and function.

What are the best practices for quantitative analysis of At4g18490 expression using these antibodies?

For reliable quantitative analysis of At4g18490:

• Include technical and biological replicates (minimum n=3)

• Use appropriate loading controls (constitutively expressed proteins of similar abundance)

• Ensure signal is within the linear range of detection

• Normalize to total protein (using stain-free technology or Ponceau staining) rather than single housekeeping genes

• Apply appropriate statistical analysis based on experimental design

• Report both raw and normalized data

• Include positive and negative controls in each experiment

How can At4g18490 antibodies contribute to understanding meiotic chromosome dynamics?

At4g18490 antibodies can be valuable tools in studying meiotic chromosome dynamics:

• Immunolocalization studies: Using these antibodies in immunofluorescence microscopy to map protein localization during meiosis

• Proximity labeling approaches: Combining with TurboID-based systems to identify interacting proteins during meiotic prophase I

• Co-immunoprecipitation: Identifying protein complexes involving At4g18490 during meiosis

• ChIP-seq applications: If At4g18490 has DNA-binding properties, mapping its binding sites across the genome

These approaches help understand the role of At4g18490 in the context of chromosome axis formation and other meiotic processes, which may provide insights into its function in plant reproduction and genome stability.

What role might At4g18490 play in genome duplication adaptation?

Research suggests At4g18490 may be involved in genome duplication adaptation pathways . When investigating this role:

• Compare protein expression patterns between diploid and polyploid plant lines

• Examine allele-specific expression using the antibody in combination with genetic analyses

• Investigate post-translational modifications that may differ between ploidy levels

• Study protein-protein interactions that may be altered following whole genome duplication

• Analyze the effect of At4g18490 knockdown/knockout on adaptation to polyploidy

Understanding this role may provide broader insights into evolutionary adaptation mechanisms in plants following whole genome duplication events.

How can researchers effectively use At4g18490 antibodies in multi-protein complex studies?

For effective use in multi-protein complex studies:

• Sequential immunoprecipitation: Use At4g18490 antibody followed by antibodies against suspected interaction partners

• Protein cross-linking: Apply protein cross-linking prior to immunoprecipitation to capture transient interactions

• Blue native PAGE: Combine with At4g18490 antibodies for Western blot detection of native complexes

• Proximity-dependent biotinylation: Use TurboID fusion proteins to identify proteins in close proximity to At4g18490

• FRET/FLIM microscopy: Combine with fluorescently tagged potential interaction partners

These advanced techniques can reveal the composition and dynamics of protein complexes containing At4g18490, providing insights into its functional role in plant cellular processes.

What emerging technologies might enhance At4g18490 antibody applications in the future?

Emerging technologies that may enhance At4g18490 antibody applications include:

• Single-cell proteomics: Enabling detection of At4g18490 in individual cells to study cell-to-cell variation

• Super-resolution microscopy: Providing nanoscale localization of At4g18490 within subcellular structures

• Digital protein profiling: Allowing absolute quantification of At4g18490 in complex samples

• CRISPR epitope tagging: Creating endogenously tagged versions of At4g18490 for enhanced detection

• Proximity proteomics improvements: Next-generation TurboID variants with faster kinetics and greater specificity

These technologies promise to expand our understanding of At4g18490's function, localization, and interactions at unprecedented resolution and sensitivity.

What are the current knowledge gaps regarding At4g18490 function that antibody studies might address?

Key knowledge gaps that antibody-based studies might address include:

• Subcellular localization patterns across different tissues and developmental stages

• Dynamic changes in protein abundance in response to environmental stresses

• Post-translational modifications and their functional significance

• Protein-protein interaction networks in different cellular contexts

• Potential roles in meiotic chromosome dynamics and genome duplication adaptation