At2g15980 Antibody

What is At2g15980 protein and what organism does it come from?

At2g15980 is a protein found in Arabidopsis thaliana (Mouse-ear cress), a model organism widely used in plant molecular biology research. The protein is cataloged in the UniProt database with the accession number Q9XIM8 . While the search results don't specify the exact function of At2g15980, its antibody is used as a research tool for detecting and studying this protein in experimental settings.

What types of At2g15980 antibodies are available for research applications?

Based on available information, At2g15980 antibodies are available as polyclonal antibodies raised in rabbits. These antibodies are typically generated using recombinant Arabidopsis thaliana At2g15980 protein as the immunogen . The polyclonal nature provides recognition of multiple epitopes, potentially increasing detection sensitivity while requiring careful validation to ensure specificity.

What are the recommended applications for At2g15980 antibodies?

At2g15980 antibodies have been tested and validated for the following applications:

• ELISA (Enzyme-Linked Immunosorbent Assay) for quantitative detection

• Western Blot (WB) for protein identification

These applications make At2g15980 antibodies useful tools for studying protein expression, abundance, and molecular weight in plant research contexts.

How should At2g15980 antibodies be stored to maintain optimal activity?

For optimal storage and preservation of At2g15980 antibody activity:

• Store at -20°C or -80°C upon receipt

• Avoid repeated freeze-thaw cycles as this can degrade antibody quality and performance

• For long-term storage (years), -80°C is recommended

• Make aliquots of reconstituted antibody to avoid repeated freeze-thaw cycles

The antibody is typically provided in a storage buffer containing 50% glycerol, 0.01M PBS at pH 7.4, and 0.03% Proclin 300 as a preservative .

What controls should be included when using At2g15980 antibodies in Western blot experiments?

When designing Western blot experiments with At2g15980 antibodies, several controls are essential:

• Positive control: Wild-type Arabidopsis thaliana samples known to express At2g15980

• Negative control: When available, include knockout or knockdown mutants lacking At2g15980 expression

• Loading control: Include detection of a housekeeping protein to ensure equal protein loading

• Secondary antibody-only control: To assess non-specific binding

• Peptide competition control: Pre-incubation of antibody with the immunizing peptide to confirm specificity

For experiments investigating treatment effects, include both treated and untreated samples, as demonstrated in antibody validation studies for other plant proteins .

How do I determine the optimal working dilution for At2g15980 antibodies?

To determine the optimal working dilution for At2g15980 antibodies:

• Begin with the manufacturer's recommended dilution (typically 1:1000 for Western blotting)

• Perform a titration experiment using a dilution series (e.g., 1:500, 1:1000, 1:2000, 1:5000)

• Identify the concentration that provides the best signal-to-noise ratio for your specific samples

• Consider that optimal dilutions may vary based on:

  • The abundance of At2g15980 in your specific samples

  • The detection system being used

  • The quality of protein extraction and transfer

Document your optimization experiments to ensure reproducibility across studies and antibody lots .

What sample preparation methods are most effective for detecting At2g15980 in plant tissues?

For optimal detection of At2g15980 in Arabidopsis tissues:

• Tissue collection and processing:

  • Collect fresh tissue and flash-freeze in liquid nitrogen

  • Grind tissue to a fine powder while maintaining freezing temperatures

  • Extract proteins with an appropriate buffer containing protease inhibitors

• Recommended extraction buffer components:

  • 50 mM Tris-HCl pH 8.0

  • 200 mM NaCl

  • 10 mM DTT

  • 1% (v/v) Triton X-100

  • Protease inhibitor cocktail

• Sample handling:

  • Denature samples in SDS sample buffer at 95°C for 5 minutes

  • Load 20-30 μg of total protein per lane for standard Western blot detection

This approach has been successfully used for other plant proteins and should be applicable to At2g15980 detection.

How can I validate the specificity of At2g15980 antibodies?

Validating antibody specificity is crucial for reliable research results. For At2g15980 antibodies:

• Compare wild-type expression with knockout/knockdown mutants when available

• Perform peptide competition assays to demonstrate specific binding

• Verify protein size corresponds to predicted molecular weight

• Test for cross-reactivity with related proteins

• Consider orthogonal detection methods when possible

• Evaluate reactivity in predicted cross-reactive species based on sequence homology

The predicted reactivity of the antibody should be consistent with evolutionary conservation of the protein sequence, as is standard practice for antibody validation .

What approaches can be used to improve At2g15980 antibody binding affinity and specificity?

Recent advances in antibody engineering, such as those described in the DyAb system, offer strategies for improving antibody performance:

• Sequence-based optimization:

  • Identify and combine beneficial mutations that improve binding affinity

  • Use machine learning models to predict the impact of mutations on binding properties

  • Test combinations of mutations to achieve optimal binding characteristics

• Experimental approaches:

  • Test different buffer compositions and pH conditions

  • Optimize incubation temperature and duration

  • Evaluate different blocking agents to reduce non-specific binding

  • Consider using additives that enhance antibody-antigen interactions

Recent research has demonstrated that combining specific mutations can improve antibody affinity by 10-fold or more compared to parental antibodies .

How can At2g15980 antibodies be used effectively in immunoprecipitation studies?

For successful immunoprecipitation (IP) of At2g15980:

• Lysate preparation:

  • Use a gentle lysis buffer that preserves protein-protein interactions

  • Pre-clear lysate with appropriate beads to reduce non-specific binding

  • Maintain cold temperatures throughout to preserve interactions

• Antibody binding:

  • Use purified antibody preparations for cleaner results

  • Determine optimal antibody-to-protein ratio through titration experiments

  • Consider crosslinking approaches similar to those used in other antibody studies

• For co-immunoprecipitation studies:

  • Consider using homobifunctional crosslinkers like dithiobis(succinimidyl propionate) to stabilize protein-protein interactions

  • Include appropriate controls to demonstrate specificity of interactions

  • Validate results with reciprocal IP when possible

Techniques developed for other plant protein antibodies can be adapted for At2g15980 IP studies.

What are the key considerations when using At2g15980 antibodies for protein quantification?

For accurate quantification of At2g15980 using antibody-based methods:

• Standard curve development:

  • Use purified recombinant At2g15980 protein to generate a standard curve

  • Ensure the linear range of detection is established for each experiment

  • Include standards on each experimental run for calibration

• Quantitative Western blotting:

  • Use digital image acquisition with a wide dynamic range

  • Avoid saturated signals which prevent accurate quantification

  • Normalize to appropriate loading controls

  • Include technical and biological replicates for statistical validity

• Quantitative ELISA considerations:

  • Optimize coating concentrations and blocking conditions

  • Use standard curves with known concentrations

  • Account for matrix effects in different sample types

  • Validate results across different detection methods when possible

How do I troubleshoot low signal or high background issues with At2g15980 antibodies?

When facing technical challenges with At2g15980 antibodies:

For low signal issues:

• Increase primary antibody concentration or incubation time

• Verify protein extraction efficiency and integrity

• Enhance detection systems (more sensitive substrates)

• Optimize antigen retrieval methods if using fixed tissues

• Consider protein enrichment methods for low-abundance targets

For high background issues:

• Increase blocking time or try alternative blocking agents

• Use more stringent washing conditions

• Titrate antibody to lower concentrations

• Pre-absorb secondary antibodies to reduce non-specific binding

• Verify secondary antibody compatibility with your experimental system

Maintaining a systematic approach to troubleshooting and changing only one variable at a time will help identify the source of problems.

How do I analyze Western blot data for At2g15980 under different experimental conditions?

For rigorous analysis of At2g15980 expression data:

• Quantification approach:

  • Use appropriate software to measure band intensity

  • Subtract local background for each lane

  • Normalize to loading controls (housekeeping proteins)

  • Present data as fold change relative to control conditions

• Statistical considerations:

  • Include at least three biological replicates

  • Apply appropriate statistical tests based on experimental design

  • Report variation (standard deviation or standard error)

  • Consider the biological significance of changes in protein levels

• Experimental comparisons:

  • When studying treatment effects, include appropriate time course and dose-response relationships

  • For developmental studies, ensure consistent tissue sampling and handling

  • When comparing genotypes, control for developmental stage and environmental conditions

What factors might affect At2g15980 detection in different plant tissues or developmental stages?

Several factors can influence antibody-based detection across tissues and development:

• Protein expression levels:

  • Expression of At2g15980 may vary significantly between tissues and developmental stages

  • Adjust protein loading or antibody concentrations accordingly

• Post-translational modifications:

  • Phosphorylation, glycosylation, or other modifications may affect epitope recognition

  • Consider using phospho-specific antibodies if studying regulated forms of the protein

• Tissue-specific interference:

  • Some plant tissues contain compounds that may interfere with antibody binding

  • Optimize extraction protocols to remove interfering compounds

  • Consider using different extraction buffers for different tissue types

• Protein complexes:

  • At2g15980 may exist in different protein complexes depending on tissue or condition

  • Native conditions may mask epitopes in certain contexts

How can I compare data from different At2g15980 antibody lots or sources?

When working with different antibody preparations:

• Standardization approach:

  • Always include reference samples that can be used across experiments

  • Maintain consistent protocols for all comparative studies

  • Document lot numbers and sources in research records

• Calibration strategy:

  • Run side-by-side comparisons with old and new antibody lots

  • Use recombinant standards when available

  • Consider relative changes rather than absolute values when comparing across lots

• Validation requirements:

  • Re-validate each new lot for specificity and sensitivity

  • Determine optimal working conditions for each lot independently

  • Be transparent about antibody sources and validation in publications

What is the recommended Western blot protocol for At2g15980 detection in Arabidopsis samples?

Recommended Western Blot Protocol for At2g15980:

• Sample preparation:

  • Extract total proteins from Arabidopsis tissues with extraction buffer containing protease inhibitors

  • Determine protein concentration using Bradford or BCA assay

  • Mix samples with 4X SDS sample buffer and heat at 95°C for 5 minutes

• SDS-PAGE:

  • Load 30 μg total protein per lane

  • Separate using 10% SDS-PAGE at 100-120V until adequate separation is achieved

• Transfer:

  • Transfer proteins to PVDF membrane (0.2 μm pore size) using wet transfer

  • Transfer at 100V for 1 hour or 30V overnight at 4°C

• Blocking:

  • Block membrane with 5% non-fat dry milk or BSA in TBST for 1 hour at room temperature

• Primary antibody:

  • Dilute At2g15980 antibody 1:1000 in blocking buffer

  • Incubate overnight at 4°C with gentle agitation

• Washing:

  • Wash membrane 3 times with TBST, 5-10 minutes each

• Secondary antibody:

  • Incubate with anti-rabbit HRP-conjugated secondary antibody (1:5000-1:10000)

  • Incubate for 1 hour at room temperature

• Detection:

  • Wash thoroughly and visualize using ECL substrate

  • Image using appropriate detection system

How can I optimize the ELISA protocol for quantitative detection of At2g15980?

Optimized ELISA Protocol for At2g15980:

• Plate preparation:

  • Coat 96-well plates with capture antibody in carbonate buffer (pH 9.6)

  • Incubate overnight at 4°C

  • Wash 3 times with PBST

• Blocking:

  • Block with 2-5% BSA or casein in PBS for 1-2 hours at room temperature

  • Wash 3 times with PBST

• Sample addition:

  • Add protein extracts and standards

  • Include a dilution series for quantification

  • Incubate 2 hours at room temperature or overnight at 4°C

• Detection antibody:

  • Add diluted At2g15980 antibody (1:1000 to 1:5000)

  • Incubate 1-2 hours at room temperature

  • Wash 4 times with PBST

• Secondary antibody:

  • Add HRP-conjugated anti-rabbit antibody

  • Incubate 1 hour at room temperature

  • Wash 5 times with PBST

• Substrate reaction:

  • Add TMB substrate and monitor color development

  • Stop reaction with 2N H₂SO₄

  • Read absorbance at 450nm

• Data analysis:

  • Generate standard curve using purified protein

  • Calculate sample concentrations from the curve

  • Apply appropriate statistical analysis

What are the recommended immunohistochemistry procedures for At2g15980 localization studies?

While specific immunohistochemistry protocols for At2g15980 are not provided in the search results, a general approach based on plant antibody practices would include:

• Tissue fixation:

  • Fix plant tissues in 4% paraformaldehyde in PBS

  • Consider testing different fixatives to preserve epitope recognition

• Tissue processing:

  • Dehydrate through ethanol series

  • Embed in paraffin or prepare for cryosectioning

  • Section at 5-10 μm thickness

• Antigen retrieval:

  • Deparaffinize and rehydrate sections

  • Perform heat-induced or enzymatic antigen retrieval if needed

  • Cool slowly to room temperature

• Blocking and permeabilization:

  • Block with 5% normal serum in PBS with 0.1-0.3% Triton X-100

  • Incubate for 1 hour at room temperature

• Primary antibody:

  • Apply At2g15980 antibody (1:100 to 1:500 dilution)

  • Incubate overnight at 4°C in a humid chamber

• Detection:

  • Use fluorescent or enzyme-conjugated secondary antibodies

  • Include DAPI for nuclear counterstaining

  • Mount with appropriate medium

• Controls:

  • Include sections without primary antibody

  • If available, use tissue from knockout plants as negative controls

How can advanced antibody engineering approaches be applied to improve At2g15980 antibody performance?

Based on recent antibody engineering research, several approaches could be applied to enhance At2g15980 antibody performance:

• Sequence-based optimization strategies:

  • Identify key residues in complementarity-determining regions (CDRs) that impact binding

  • Apply machine learning models to predict beneficial mutations

  • Test combinations of mutations that collectively improve binding properties

• Experimental validation approach:

  • Generate a library of antibody variants with different mutations

  • Screen for improved binding using surface plasmon resonance (SPR)

  • Validate top candidates in relevant applications (Western blot, ELISA, etc.)

• Performance metrics to evaluate:

  • Binding affinity (KD)

  • Specificity (cross-reactivity profile)

  • Stability under experimental conditions

  • Expression and purification yields

Recent research has demonstrated that optimized antibody designs can achieve binding improvements of 3-10 fold compared to parent antibodies, with success rates of 85-89% for expressing and binding engineered antibodies .