At2g44050 Antibody

What are the specifications and storage requirements for the At2g44050 antibody?

The At2g44050 antibody (product code CSB-PA524971XA01DOA) is a polyclonal antibody raised in rabbits using recombinant Arabidopsis thaliana At2g44050 protein as the immunogen . The antibody has been affinity-purified using the antigen, which enhances its specificity for the target protein . It is supplied in liquid form with a storage buffer containing 0.03% Proclin 300 (preservative), 50% Glycerol, and 0.01M PBS at pH 7.4 .

For optimal storage:

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

• Avoid repeated freeze-thaw cycles to maintain antibody integrity

• For long-term storage, consider aliquoting to minimize freeze-thaw cycles

• When working with the antibody, thaw on ice and keep cold during handling

• Return to appropriate storage temperature immediately after use

The antibody has a recommended lead time of 14-16 weeks for made-to-order production, which should be considered when planning experiments .

What applications has the At2g44050 antibody been validated for?

The At2g44050 antibody has been tested and validated for the following applications:

• ELISA (Enzyme-Linked Immunosorbent Assay): Used for quantitative detection of At2g44050 protein in sample preparations

• Western Blot (WB): Used for detection of the denatured protein in complex mixtures

The antibody specifically reacts with Arabidopsis thaliana proteins and has been designed to ensure proper identification of the antigen . When designing experiments, researchers should consider the following:

For Western Blot applications:

• Optimize protein extraction protocols for plant tissues

• Include appropriate positive controls (Arabidopsis wild-type extracts)

• Consider negative controls (knockout mutants if available)

• Determine optimal antibody dilution through titration experiments

For ELISA applications:

• Standardize protein extraction and quantification methods

• Develop standard curves using recombinant At2g44050 if available

• Validate specificity using competitive inhibition with the immunizing antigen

How can I optimize Western Blot protocols specifically for At2g44050 detection in plant samples?

Optimizing Western Blot protocols for plant proteins like At2g44050 requires addressing the unique challenges of plant tissue extraction:

Sample Preparation:

• Use extraction buffers designed for plant tissues, containing PVPP to remove phenolic compounds

• Include protease inhibitor cocktails to prevent degradation

• Consider adding reducing agents like DTT or β-mercaptoethanol to maintain protein integrity

• For membrane-associated proteins, include appropriate detergents (0.5-1% Triton X-100)

Gel Electrophoresis and Transfer:

• Select gel percentage based on the molecular weight of At2g44050

• For plant samples, extend transfer times (1-2 hours) at lower voltage to improve efficiency

• Verify transfer using Ponceau S staining before immunodetection

Antibody Incubation:

• Start with 1:1000 dilution for primary antibody incubation in 5% BSA or milk in TBST

• Extend primary antibody incubation to overnight at 4°C for improved sensitivity

• Wash thoroughly (4-5 times, 5-10 minutes each) to reduce background

Detection:

• For low-abundance proteins, consider enhanced chemiluminescence detection

• Document exposure times and capture multiple exposures to ensure optimal signal-to-noise ratio

Troubleshooting plant-specific issues:

• High background: Add 0.05-0.1% SDS to antibody dilution buffer to reduce non-specific binding

• Weak signal: Consider enrichment techniques like immunoprecipitation before Western Blot

• Multiple bands: Evaluate potential degradation or post-translational modifications

What methods can be used to study potential interactions between At2g44050 and auxin signaling pathways?

To investigate potential connections between At2g44050 and auxin signaling pathways, researchers can employ several complementary approaches:

Expression Analysis:

• Monitor At2g44050 protein levels using the antibody after exogenous auxin treatment

• Compare expression in wild-type plants versus auxin signaling mutants

• Examine spatial expression patterns in different tissues, especially those known to be auxin-responsive

• Conduct time-course studies to determine if At2g44050 responds rapidly or slowly to auxin

Auxin-related experimental approaches:

• Apply exogenous auxin (IAA) treatments at physiologically relevant concentrations (0.1-10 μM)

• Use auxin transport inhibitors (NPA, TIBA) to disrupt auxin distribution

• Examine expression during auxin-mediated processes like lateral root formation or gravitropic responses

• Compare with known auxin-responsive marker proteins as positive controls

Genetic approaches:

• Analyze At2g44050 expression in auxin signaling mutants (tir1/afb receptors, arf transcription factors)

• Create and characterize At2g44050 knockout or overexpression lines

• Examine phenotypes related to auxin responses (root development, hypocotyl elongation, gravitropism)

Based on information about auxin-responsive genes in Arabidopsis, researchers should particularly examine At2g44050 expression during tropic responses, as auxin redistribution during gravitropism induces asymmetrical gene expression preceding visible physiological responses .

How can At2g44050 antibody be used in co-immunoprecipitation studies to identify protein interaction partners?

Co-immunoprecipitation (Co-IP) is valuable for identifying protein interaction partners of At2g44050 in Arabidopsis. The procedure must be optimized for plant tissues:

Sample Preparation:

• Harvest 2-5 g of fresh plant tissue and grind in liquid nitrogen

• Extract in buffer containing 50 mM Tris-HCl pH 7.5, 150 mM NaCl, 0.5% NP-40, and protease inhibitors

• Include phosphatase inhibitors if studying phosphorylation-dependent interactions

• Clear lysate by centrifugation (14,000 rpm, 15 minutes, 4°C)

Immunoprecipitation:

• Pre-clear lysate with protein A/G beads (1 hour, 4°C) to remove non-specific binding proteins

• Incubate cleared lysate with optimized amount of At2g44050 antibody (2-5 μg per reaction)

• Include negative controls: non-immune rabbit IgG and lysate from At2g44050 knockout plants if available

• Incubate overnight at 4°C with gentle rotation

• Add protein A/G beads and incubate for 3-4 hours at 4°C

• Wash beads 5 times with wash buffer containing 0.1% detergent

Analysis:

• Elute bound proteins with SDS sample buffer or low pH elution buffer

• Analyze by SDS-PAGE followed by Western blot for suspected interaction partners

• For unbiased discovery, analyze by mass spectrometry

Validation methods:

• Perform reverse Co-IP using antibodies against identified partners

• Test interactions under different conditions (hormonal treatments, stress conditions)

• Confirm biological relevance through genetic or functional studies

This approach can reveal whether At2g44050 forms part of larger protein complexes involved in plant development or stress responses.

Methodological Considerations

Immunolocalization techniques can reveal the subcellular distribution of At2g44050 in Arabidopsis cells:

Sample Preparation:

• Fix plant tissues in 4% paraformaldehyde in PBS (pH 7.4) for 2-4 hours

• For whole-mount preparations, vacuum infiltrate fixative to ensure penetration

• For sectioning, embed fixed tissue in paraffin or resin and prepare 5-10 μm sections

• For protoplasts, fix cells in suspension for 15-30 minutes

Permeabilization and Antigen Retrieval:

• Plant cells require effective cell wall and membrane permeabilization

• Use 0.1-0.5% Triton X-100 or 0.05-0.1% Tween-20 in PBS

• For fixed sections, consider heat-mediated antigen retrieval (citrate buffer, pH 6.0)

• Enzymatic treatment with cell wall degrading enzymes may improve accessibility

Immunolabeling:

• Block with 5% normal serum and 3% BSA in PBS with 0.3% Triton X-100

• Incubate with At2g44050 antibody at optimized dilution (start with 1:100 to 1:500)

• Extend primary antibody incubation to overnight at 4°C

• Use fluorophore-conjugated secondary antibodies for visualization

• Include organelle markers for co-localization studies

Controls:

• Primary antibody omission control

• Pre-immune serum or isotype control

• Peptide competition control

• Genetic controls (knockout/knockdown plants)

Imaging and Analysis:

• Use confocal microscopy for optimal resolution

• Capture z-stacks to reconstruct 3D distribution

• Quantify signal intensity in different subcellular compartments

• Compare localization across different tissues and developmental stages

This approach can reveal whether At2g44050 localizes to specific organelles, the nucleus, cytoplasm, or plasma membrane, providing insights into its potential function.

What approaches can be used to study At2g44050 expression changes during plant development and stress responses?

Monitoring At2g44050 expression changes requires combining antibody-based detection with appropriate experimental designs:

Developmental Expression Analysis:

• Collect tissues at different developmental stages (seedling, vegetative, reproductive)

• Prepare protein extracts from specific organs (roots, leaves, stems, flowers)

• Analyze by Western blot using the At2g44050 antibody

• Normalize expression to appropriate housekeeping proteins

• Create a developmental expression map based on quantified results

Stress Response Studies:

• Design experiments testing multiple abiotic stresses:

  • Drought (withholding water or PEG treatment)

  • Salt (NaCl application, 50-200 mM)

  • Cold (4°C exposure)

  • Heat (37-42°C exposure)

  • Oxidative stress (H₂O₂ or paraquat treatment)

• Include appropriate time courses (minutes to days) to capture dynamic responses

• Compare with known stress-responsive marker proteins

• Look for post-translational modifications (phosphorylation, ubiquitination)

Hormone Treatment Studies:

• From search results, AtDREB2G (a transcription factor) shows involvement in low-temperature stress and ABA responses

• Test whether At2g44050 responds to similar stimuli

• Apply ABA treatments (10-50 μM) and monitor expression changes

• Include other major hormones (auxin, cytokinin, ethylene, jasmonate, gibberellin)

• Analyze expression after 1-24 hours of treatment

Quantitative Analysis:

• Use densitometry to quantify Western blot signals

• Apply appropriate statistical tests to determine significance

• Present data as fold-change relative to control conditions

• Document variability across biological replicates

These approaches can reveal the contexts in which At2g44050 may play important functional roles in plant biology.

How can I study potential post-translational modifications of At2g44050 using the available antibody?

Post-translational modifications (PTMs) often regulate protein function. To investigate PTMs of At2g44050:

Detection of Phosphorylation:

• Run protein samples on standard SDS-PAGE and Phos-tag™ SDS-PAGE in parallel

• Phos-tag™ gels specifically retard migration of phosphorylated proteins

• Compare migration patterns with and without phosphatase treatment

• Look for mobility shifts indicating phosphorylated forms

• Treat samples with lambda phosphatase to confirm phosphorylation

Enrichment Strategies:

• Immunoprecipitate At2g44050 using the antibody

• Analyze immunoprecipitated protein by mass spectrometry

• Look for mass shifts corresponding to phosphorylation (+80 Da) or other modifications

• Use phospho-protein enrichment methods (IMAC, TiO₂) before analysis

2D Gel Electrophoresis:

• Separate proteins by isoelectric point (first dimension) and molecular weight (second dimension)

• Detect At2g44050 by Western blot after 2D separation

• Phosphorylation and other PTMs alter isoelectric point

• Compare patterns across different conditions

Stimulus-Dependent Modification:

• Treat plants with stimuli known to induce PTMs (stress, hormones)

• Focus on conditions where AtDREB2G shows activity (low temperature, ABA)

• Look for modification-specific shifts in migration pattern

• Compare with known PTM-regulated proteins as positive controls

Functional Analysis:

• Correlate PTM status with protein function or localization

• Test effects of phosphatase inhibitors on protein activity

• Consider creating phospho-mimetic or phospho-null mutants to study functional significance

These approaches can reveal how At2g44050 may be regulated through post-translational mechanisms in response to developmental or environmental signals.

How can At2g44050 antibody be used in chromatin immunoprecipitation studies if the protein has DNA-binding properties?

If At2g44050 functions as a transcription factor or chromatin-associated protein, Chromatin Immunoprecipitation (ChIP) can identify its genomic binding sites:

Sample Preparation:

• Cross-link 1-3g of Arabidopsis tissue with 1% formaldehyde for 10-15 minutes under vacuum

• Quench with 0.125M glycine

• Extract and purify nuclei using plant-specific nuclear isolation buffers

• Sonicate chromatin to achieve fragments of 200-500 bp

• Verify fragmentation by agarose gel electrophoresis

Immunoprecipitation:

• Pre-clear chromatin with protein A/G beads

• Immunoprecipitate with At2g44050 antibody (3-5 μg per reaction)

• Include appropriate controls:

  • Input DNA (non-immunoprecipitated chromatin)

  • Non-specific IgG immunoprecipitation

  • If available, ChIP from At2g44050 knockout plants

• Perform stringent washes to remove non-specific interactions

DNA Recovery and Analysis:

• Reverse cross-links (65°C, overnight)

• Treat with RNase A and Proteinase K

• Purify DNA using column-based methods

• For targeted analysis, perform qPCR on suspected binding regions

• For genome-wide analysis, prepare libraries for ChIP-seq

Data Analysis:

• For ChIP-qPCR: Calculate percent input or fold enrichment over IgG control

• For ChIP-seq: Identify binding peaks using appropriate algorithms

• Perform motif discovery to identify binding sequences

• Associate binding sites with nearby genes

• Integrate with transcriptome data to identify potential regulatory targets

Based on information about AtDREB2G functioning as a transcription factor in stress responses , similar approaches could be applied if At2g44050 has related functions.

What are the key considerations for comparing At2g44050 expression across different Arabidopsis ecotypes or mutant lines?

Comparative analysis of At2g44050 across different genetic backgrounds requires careful experimental design:

Sample Standardization:

• Grow all plants under identical controlled conditions

• Harvest tissues at equivalent developmental stages

• Collect samples at the same time of day to control for circadian effects

• Process all samples simultaneously using identical protocols

Extraction Optimization:

• Use a consistent protein extraction method across all samples

• Quantify protein concentrations using reliable methods (Bradford, BCA)

• Load equal amounts of total protein per lane (20-50 μg)

• Include loading controls for normalization (ACTIN, TUBULIN, or total protein stain)

Western Blot Considerations:

• Run all samples on the same gel when possible

• Transfer to membrane under identical conditions

• Process all blots simultaneously with the same antibody dilutions

• Include common control samples across multiple blots for inter-blot normalization

Quantification and Statistical Analysis:

• Use digital image capture and analysis software for quantification

• Apply appropriate statistical tests (ANOVA with post-hoc tests for multiple comparisons)

• Include sufficient biological replicates (minimum n=3, preferably n≥5)

• Present data with appropriate error bars and significance indicators

Genetic Background Considerations:

• For T-DNA insertion lines, verify insertion sites and their effect on At2g44050

• For CRISPR-generated mutants, sequence the target region to confirm mutations

• For overexpression lines, verify increased protein levels

• Consider analyzing heterozygous plants alongside homozygous mutants

Additional Controls:

• Include known stress-responsive or developmentally regulated proteins as positive controls

• Test antibody specificity in each genetic background

• Consider complementation tests to confirm phenotype-genotype relationships

This systematic approach ensures reliable comparison of At2g44050 expression across different genetic backgrounds, crucial for understanding its function.