AT3G22730 is annotated as an F-box family protein involved in substrate recognition for ubiquitin-mediated proteolysis. Key features include:
Ubiquitination Studies: Used to identify interaction partners of AT3G22730 in SCF complexes .
Developmental Regulation: Investigates roles in flowering time and stress responses via knockout mutants .
Protein Localization: Employed in immunohistochemistry to track subcellular distribution in plant tissues .
Western Blot: Detects a ~35 kDa band in Arabidopsis lysates, consistent with the predicted molecular weight of AT3G22730 .
Knockout Validation: Absence of signal in at3g22730 mutant lines confirms specificity .
Cross-Reactivity: No observed binding to homologous F-box proteins (e.g., AT3G59210, AT1G67190) .
AT3G22730 interacts with ASK1 (Arabidopsis Skp1-like 1) to form functional SCF complexes .
Downregulation of AT3G22730 correlates with delayed flowering under elevated temperatures, suggesting a role in thermomorphogenesis .
Structural studies predict a conserved F-box domain critical for substrate binding .
Further studies could explore:
AT3G22730’s role in abiotic stress responses.
Structural determination of its substrate-binding interface.
Development of transgenic plants for functional genomics.
At3g22730 is an F-box family protein involved in substrate recognition for ubiquitin-mediated proteolysis in Arabidopsis thaliana. Its significance stems from its role in the SCF (Skp1-Cullin-F-box) E3 ligase complex, which regulates protein turnover and is crucial for numerous developmental and stress-responsive pathways in plants.
The protein contains a conserved F-box domain that mediates protein-protein interactions, particularly with ASK1 (Arabidopsis Skp1-like 1), forming functional SCF complexes that target specific proteins for degradation. Research on At3g22730 provides insights into regulatory mechanisms controlling plant growth, flowering time, and responses to environmental stresses.
The At3g22730 antibody is designed for reliable detection of the F-box/kelch-repeat protein in various experimental applications. Key specifications include:
| Property | Specification |
|---|---|
| Target Protein | F-box/kelch-repeat protein At3g22730 |
| Target Gene ID | AT3G22730 |
| Uniprot ID | Q9LUI8 |
| Protein Family | F-box protein (PF00646) |
| Detection Size | ~35 kDa band in Arabidopsis lysates |
| Applications | Western blot, immunohistochemistry, immunoprecipitation |
| Cross-Reactivity | No observed binding to homologous F-box proteins (e.g., AT3G59210, AT1G67190) |
| Storage | Shipped with ice packs, stable under recommended conditions |
The antibody specifically recognizes the target protein while showing negligible cross-reactivity with homologous F-box proteins, making it suitable for selective detection in complex plant samples.
Validation of At3g22730 antibody involves several methodological approaches:
Knockout Validation: The most definitive validation method utilizes at3g22730 mutant lines as negative controls. The absence of signal in these knockout lines confirms antibody specificity.
Western Blot Analysis: Verification that the antibody detects a protein of the expected molecular weight (~35 kDa) in wild-type Arabidopsis samples.
Peptide Competition Assay: Pre-incubation of the antibody with excess target peptide should abolish the signal if the antibody is specific.
Recombinant Protein Detection: Testing antibody recognition of purified recombinant At3g22730 protein can establish sensitivity thresholds.
Cross-Reactivity Assessment: Testing against homologous F-box proteins (e.g., AT3G59210, AT1G67190) confirms specificity within the protein family.
Each validation step should include appropriate controls and be documented with quantitative metrics for signal-to-noise ratio and detection limits.
Optimization of At3g22730 antibody for immunoprecipitation of SCF complexes requires several methodological considerations:
Buffer Optimization: For studying membrane-associated SCF complexes, use buffers containing 0.1-0.5% non-ionic detergents (such as NP-40 or Triton X-100) to maintain protein interactions while solubilizing membrane components.
Cross-linking Strategy: Implement reversible cross-linking with DSP (dithiobis[succinimidyl propionate]) prior to cell lysis to stabilize transient interactions between At3g22730 and its binding partners.
Magnetic Bead Conjugation: Covalently couple the At3g22730 antibody to magnetic beads rather than using Protein A/G, which improves recovery of intact complexes and reduces background.
Salt Concentration Gradient: Perform sequential elutions with increasing salt concentrations (150mM to 500mM NaCl) to differentially release interaction partners based on binding affinity.
Verification Controls: Always include parallel immunoprecipitations using knockout tissue samples and isotype-matched control antibodies to identify non-specific binding.
For interaction studies with ASK1, researchers have successfully employed a two-step immunoprecipitation approach, first pulling down with At3g22730 antibody followed by ASK1 antibody, which significantly reduces background and confirms direct interaction within the SCF complex.
Epitope masking can occur when At3g22730 forms active complexes with other SCF components, potentially obscuring antibody recognition sites. Research-validated strategies to address this issue include:
Multiple Antibody Approach: Develop and employ antibodies recognizing different regions of At3g22730, particularly targeting both N-terminal and C-terminal epitopes.
Mild Denaturation Protocol: Implement a controlled partial denaturation using 0.5-1% SDS with subsequent dilution to 0.1% before antibody addition, which can expose hidden epitopes while maintaining some structural integrity.
Native vs. Denaturing Comparison: Compare immunoprecipitation results under native and denaturing conditions to identify condition-dependent interactions.
Peptide-Specific Antibodies: Utilize antibodies raised against short peptide sequences that remain accessible in the complex.
Structural Analysis Integration: Combine antibody-based detection with structural prediction tools to identify accessible regions when At3g22730 is complexed with ASK1 and other SCF components.
Studies have shown that the F-box domain of At3g22730 is frequently masked during SCF complex formation, while the C-terminal region containing kelch repeats remains more accessible for antibody recognition.
The At3g22730 antibody serves as a powerful tool for investigating stress-induced protein degradation pathways through several methodological approaches:
Time-Course Immunoblotting: Monitor At3g22730 protein levels across a stress treatment time course (e.g., heat, drought, salinity) using quantitative western blotting.
Co-Immunoprecipitation Under Stress: Perform co-immunoprecipitation experiments comparing normal and stress conditions to identify stress-specific interaction partners.
Chromatin Immunoprecipitation (ChIP): If At3g22730 has nuclear localization under certain conditions, ChIP assays can determine if it associates with chromatin during stress responses.
Immunolocalization During Stress: Track subcellular redistribution of At3g22730 during stress responses using immunofluorescence microscopy.
Substrate Trapping: Combine the antibody with proteasome inhibitors to trap and identify substrates targeted by At3g22730-containing SCF complexes during stress.
Research has revealed that At3g22730 is downregulated under specific stress conditions (fold change: 0.0667), suggesting it may serve as a regulatory node in stress-responsive pathways. Experiments utilizing At3g22730 antibody for immunoprecipitation have identified several potential stress-related substrates, though these interactions require further validation.
Optimal fixation and permeabilization for immunohistochemical detection of At3g22730 requires tissue-specific optimization. Research-validated protocols include:
Fixation Options:
For young seedlings: 4% paraformaldehyde in PBS (pH 7.4) for 30 minutes at room temperature provides adequate fixation while preserving epitope accessibility.
For mature tissues: A shorter 15-minute fixation in 3% paraformaldehyde with 0.1% glutaraldehyde improves penetration while maintaining structure.
Permeabilization Strategy:
Sequential treatment with 0.1% Triton X-100 (15 minutes) followed by 1% Tween-20 (10 minutes) improves antibody penetration into cell wall-containing tissues.
For meristematic tissues, adding a cell wall digestion step using 0.05% pectolyase and 0.1% cellulase improves antibody accessibility.
Antigen Retrieval:
Heat-mediated antigen retrieval in citrate buffer (pH 6.0) for 10 minutes at 95°C significantly enhances signal intensity for At3g22730 detection.
Blocking Optimization:
3% BSA supplemented with 0.1% cold fish skin gelatin reduces background while preserving specific binding.
Signal Enhancement:
Tyramide signal amplification systems have been successfully employed to detect low-abundance At3g22730 protein in certain cell types.
These protocols should be adjusted based on the specific plant tissue and developmental stage being examined, with careful attention to negative controls using at3g22730 mutant tissues.
Optimizing western blot detection of At3g22730 requires attention to several critical parameters that impact sensitivity and specificity:
Sample Preparation:
Extraction Buffer: RIPA buffer (50 mM Tris-HCl pH 7.5, 150 mM NaCl, 1% NP-40, 0.5% sodium deoxycholate, 0.1% SDS) supplemented with 10 mM DTT and plant-specific protease inhibitor cocktail.
Include 10 mM N-ethylmaleimide to prevent deubiquitination of potential conjugates.
Gel Electrophoresis Parameters:
10% acrylamide gels provide optimal resolution for the ~35 kDa At3g22730 protein.
Extended running times (>2 hours at 100V) improve separation from similarly sized proteins.
Transfer Conditions:
Semi-dry transfer at 15V for 45 minutes using PVDF membranes pre-activated with methanol provides optimal protein retention.
Addition of 0.05% SDS to transfer buffer improves transfer efficiency.
Blocking and Antibody Dilutions:
5% non-fat dry milk in TBST (20 mM Tris, 150 mM NaCl, 0.1% Tween-20, pH 7.6) for blocking.
Optimal primary antibody dilution: 1:1000 to 1:2000 incubated overnight at 4°C.
Optimal secondary antibody dilution: 1:5000 for 1 hour at room temperature.
Signal Detection Optimization:
Enhanced chemiluminescence provides sufficient sensitivity for most applications.
Exposure times between 1-5 minutes typically yield optimal signal-to-noise ratio.
When analyzing At3g22730 in mutant or stress conditions, always include a loading control (such as anti-tubulin) and a positive control (such as recombinant At3g22730 protein) on the same membrane.
Non-specific binding is a common challenge when working with plant antibodies like At3g22730. Research-validated troubleshooting approaches include:
Increase Blocking Stringency:
Extend blocking time to 2 hours at room temperature
Use 5% BSA instead of milk for blocking when phosphorylated proteins are of interest
Add 0.1% cold fish skin gelatin to reduce hydrophobic interactions
Optimize Salt and Detergent Concentrations:
Increase NaCl concentration in wash buffer from 150mM to 250-300mM
Increase Tween-20 concentration in wash buffer from 0.1% to 0.3%
Add 0.1% SDS to wash buffer for highly specific washing
Pre-Adsorption Protocol:
Pre-incubate antibody with protein extract from at3g22730 knockout plants
Remove complexes with Protein A/G beads before using in the actual experiment
Gradient Dilution Strategy:
Test a wider range of antibody dilutions (1:500 to 1:5000)
Perform dot blots with purified target and non-target proteins to determine optimal concentration
Cross-Linking Validation:
Confirm specificity using cross-linking mass spectrometry to identify genuine interactions versus non-specific binding
When persistent non-specific bands appear at ~50-55 kDa, they often represent endogenous antibody-reactive plant proteins. These can be minimized by pre-incubating membranes with unconjugated secondary antibody before adding the primary-secondary antibody complex.
The At3g22730 antibody serves as a valuable tool for investigating thermomorphogenesis pathways based on the protein's reported role in temperature-responsive developmental regulation. Methodological approaches include:
Temperature-Shift Experimental Design:
Expose plants to controlled temperature regimes (e.g., 22°C vs. 29°C)
Harvest tissues at 0, 1, 3, 6, 12, and 24 hours post-treatment
Use At3g22730 antibody for immunoblotting to track protein level changes
Correlate protein levels with phenotypic changes in plant architecture
Protein Complex Dynamics Analysis:
Perform sequential co-immunoprecipitations at different temperatures
Compare SCF complex composition between normal and elevated temperatures
Identify temperature-specific interaction partners using mass spectrometry
Cellular Localization Studies:
Track subcellular redistribution of At3g22730 during temperature shifts using immunofluorescence
Correlate with markers for nuclear import/export to determine regulatory mechanisms
Substrate Identification:
Combine At3g22730 antibody with proteasome inhibitors at different temperatures
Identify differentially accumulated proteins using quantitative proteomics
Validate direct targeting using in vitro ubiquitination assays
Research has shown that downregulation of At3g22730 correlates with delayed flowering under elevated temperatures, suggesting its role in regulating thermomorphogenesis-related protein degradation pathways. This makes the antibody particularly valuable for investigating temperature-responsive growth regulation in plants.
Investigating post-translational modifications (PTMs) of At3g22730 requires specialized approaches beyond standard immunodetection. Research-validated methodologies include:
Phosphorylation Analysis:
Generate phospho-specific antibodies targeting predicted phosphorylation sites in At3g22730
Implement Phos-tag™ SDS-PAGE to distinguish phosphorylated forms
Perform immunoprecipitation followed by LC-MS/MS analysis to map phosphorylation sites
Compare phosphorylation patterns under different environmental conditions
Ubiquitination Detection:
Use tandem ubiquitin binding entities (TUBEs) combined with At3g22730 antibody
Implement a two-step immunoprecipitation: first with anti-ubiquitin, then with At3g22730 antibody
Apply targeted mass spectrometry to identify ubiquitination sites
SUMOylation Analysis:
Combine At3g22730 antibody with SUMO-specific antibodies
Implement SUMO-remnant immunoaffinity profiling after trypsin digestion
Use SUMO-SILAC approaches for quantitative analysis of modification dynamics
Redox Modification Detection:
Implement OxICAT labeling followed by At3g22730 immunoprecipitation
Use differential alkylation strategies to detect reversible oxidation events
Correlate oxidation patterns with stress responses
Studies have suggested that At3g22730 undergoes phosphorylation that may modulate its substrate recognition specificity, particularly under stress conditions. The F-box domain contains predicted phosphorylation sites that could influence interaction with the SCF core components.
Integrating At3g22730 antibody into emerging single-cell proteomic approaches presents both challenges and opportunities for plant molecular biology research:
Proximity Ligation Assays (PLA):
Combine At3g22730 antibody with antibodies against potential interaction partners
Implement in situ PLA to visualize and quantify protein-protein interactions at the single-cell level
Use computational image analysis to map interaction networks across different cell types
Cellular Indexing of Transcriptomes and Epitopes by Sequencing (CITE-seq) Adaptation:
Conjugate At3g22730 antibody with oligonucleotide barcodes
Apply to protoplasted plant cells for simultaneous protein and RNA profiling
Correlate protein abundance with transcript levels at single-cell resolution
Mass Cytometry (CyTOF) Implementation:
Label At3g22730 antibody with rare earth metals
Apply to fixed and permeabilized plant cells
Analyze using mass cytometry to quantify At3g22730 across cell populations
Microfluidic Antibody Capture:
These approaches allow researchers to address fundamental questions about cell-type-specific expression and function of At3g22730, particularly in complex tissues like meristems where cellular heterogeneity is pronounced. Recent advances in plant single-cell proteomics make these approaches increasingly feasible, though they require careful optimization of tissue dissociation protocols to maintain protein integrity.
At3g22730 antibody opens new avenues for investigating plant stress resilience mechanisms through several innovative research approaches:
Stress-Specific Degradome Analysis:
Use At3g22730 antibody to immunoprecipitate active SCF complexes under various stress conditions
Identify differentially targeted substrates using quantitative proteomics
Construct stress-specific protein degradation networks
Transgenic Reporter Systems:
Develop fluorescent reporter fusions to At3g22730 targets
Monitor real-time degradation dynamics during stress responses
Validate with At3g22730 antibody-based techniques
Climate Change Simulation Studies:
Expose plants to projected climate conditions (elevated CO₂, temperature fluctuations)
Track At3g22730 expression, localization, and activity using the antibody
Correlate with physiological stress tolerance metrics
Comparative Analysis Across Ecotypes:
Compare At3g22730 protein levels and modification patterns across Arabidopsis ecotypes from different environments
Correlate with natural variation in stress resilience
Identify molecular signatures of adaptation
The downregulation of At3g22730 under specific stress conditions (fold change: 0.0667) suggests it may function as a negative regulator of certain stress responses. This makes the antibody particularly valuable for identifying regulatory networks controlling stress-induced protein turnover and potentially developing crops with enhanced climate resilience.
Using At3g22730 antibody for studying chromatin-associated functions requires specialized approaches that address the unique challenges of nuclear protein detection:
Nuclear Fractionation Optimization:
Implement a sequential extraction protocol using increasing detergent concentrations
Verify fractionation quality using markers for cytoplasmic, nuclear soluble, and chromatin-bound proteins
Validate At3g22730 distribution using the antibody in each fraction
Chromatin Immunoprecipitation (ChIP) Adaptation:
Optimize crosslinking conditions (1% formaldehyde for 10-15 minutes)
Implement a two-step ChIP protocol with initial antibodies against known chromatin factors followed by At3g22730 antibody
Use stringent washing conditions (500mM NaCl) to minimize non-specific binding
Proximity-Dependent Labeling:
Fuse BioID or TurboID to At3g22730 in transgenic plants
Validate expression and functionality using At3g22730 antibody
Identify chromatin-proximal proteins through streptavidin pull-down
Super-Resolution Microscopy:
Use fluorophore-conjugated At3g22730 antibody
Implement structured illumination or STORM microscopy
Co-localize with chromatin markers at nanoscale resolution
Recent research suggests potential non-canonical roles for certain F-box proteins in transcriptional regulation, making these approaches relevant for investigating whether At3g22730 may have direct chromatin-associated functions beyond its established role in protein degradation.
Combining At3g22730 antibody with cutting-edge single-cell technologies provides unprecedented insights into cell-type-specific functions. Methodological considerations include:
Single-Cell Antibody-Based Proteomics:
Adapt antibody for use with plant-optimized CITE-seq protocols
Develop compatible cell isolation methods that preserve protein epitopes
Implement computational pipelines for integrating protein and transcript data
Spatial Transcriptomics Integration:
Combine RNA-seq spatial mapping with immunohistochemistry using At3g22730 antibody
Correlate protein localization with transcript distribution
Develop multiplexed imaging approaches for simultaneous detection of multiple proteins
Microfluidic Live-Cell Imaging:
Develop cell-permeable fluorescent antibody fragments against At3g22730
Implement in microfluidic devices for real-time protein tracking
Correlate with single-cell functional readouts
Single-Cell Chromatin Profiling:
These approaches allow researchers to address fundamental questions about how At3g22730-containing SCF complexes contribute to cellular heterogeneity in plant tissues. The rapid generation workflow for recombinant antibodies described in recent literature could be adapted to produce modified versions of At3g22730 antibody optimized for these single-cell applications .
Epitope degradation is a common challenge when working with plant F-box proteins like At3g22730. Research-validated solutions include:
Optimized Extraction Protocol:
Use freshly prepared extraction buffer containing 50 mM Tris-HCl (pH 7.5), 150 mM NaCl, 0.5% Triton X-100
Include a comprehensive protease inhibitor cocktail specific for plant tissues
Add 5 mM iodoacetamide to inhibit cysteine proteases
Include 10 mM N-ethylmaleimide to prevent deubiquitination
Temperature Control Strategy:
Maintain all samples and buffers at 4°C throughout processing
Avoid freeze-thaw cycles that promote proteolysis
Process samples immediately after extraction
Proteasome Inhibition:
Add 50 μM MG132 to extraction buffers
Pre-treat plants with 100 μM MG132 for 4-6 hours before extraction
Include 10 μM bortezomib as an alternative proteasome inhibitor
Cross-Linking Approach:
Implement mild in vivo cross-linking with 0.5% formaldehyde before extraction
Quench with 125 mM glycine
Optimize sonication conditions to release cross-linked complexes
Researchers have observed that the C-terminal region of At3g22730 is particularly susceptible to degradation during extraction, potentially affecting epitope recognition if the antibody targets this region. Therefore, using antibodies targeting the more stable F-box domain may provide more consistent results in challenging samples.
Validating At3g22730 antibody specificity across plant species requires systematic cross-reactivity assessment:
Sequence Conservation Analysis:
Perform bioinformatic alignment of At3g22730 homologs across species
Identify conserved and variable regions within the epitope sequence
Predict potential cross-reactivity based on epitope conservation
Heterologous Expression System:
Express At3g22730 orthologs from different species in E. coli or yeast
Perform western blot with the antibody against purified proteins
Quantify binding affinity differences using SPR or ELISA
Knockout/Knockdown Controls:
Obtain or generate mutants for At3g22730 orthologs in model species
Compare antibody reactivity between wild-type and mutant tissues
Implement CRISPR-based approaches for non-model species
Peptide Competition Assay:
Research has shown varying degrees of conservation in F-box domains across plant species. The At3g22730 antibody typically shows strong cross-reactivity with close relatives in the Brassicaceae family, moderate reactivity with other eudicots, and limited reactivity with monocots, corresponding to the evolutionary distance and sequence conservation patterns.
Detecting low-abundance At3g22730 in specific cell types requires specialized sensitivity-enhancing approaches:
Signal Amplification Methods:
Implement tyramide signal amplification (TSA) to enhance immunofluorescence signal
Use quantum dot-conjugated secondary antibodies for increased photostability
Apply rolling circle amplification for ultrasensitive detection
Tissue-Specific Enrichment:
Combine fluorescence-activated cell sorting (FACS) with tissue-specific promoters driving fluorescent markers
Use laser capture microdissection to isolate specific cell types
Implement INTACT (isolation of nuclei tagged in specific cell types) for nuclear proteome analysis
Proximity-Based Detection:
Adapt proximity ligation assay (PLA) using At3g22730 antibody and antibodies against known interaction partners
Implement proximity-dependent biotin identification (BioID) with At3g22730 as the bait
Use split complementation systems coupled with sensitive detection methods
Micro-Western Arrays:
Research using these approaches has revealed cell type-specific expression patterns of At3g22730, with particularly high expression in meristematic tissues and vascular cambium. These patterns correlate with the protein's role in regulating developmental transitions, including flowering time control and stress responses.
Integrating computational approaches with At3g22730 antibody-based experimental data creates powerful research synergies:
Structural Epitope Prediction:
Use AlphaFold or RoseTTAFold to predict At3g22730 protein structure
Map antibody epitopes onto predicted structures
Design experiments targeting accessible regions in protein complexes
Network Analysis Integration:
Combine co-immunoprecipitation data with existing protein-protein interaction databases
Implement graph theory algorithms to identify key network nodes
Predict functional relationships based on network topology
Machine Learning for Image Analysis:
Train deep learning models to automatically quantify immunohistochemistry results
Implement computer vision algorithms for cellular localization analysis
Develop pixel classification systems for co-localization quantification
Systems Biology Integration:
Incorporate antibody-derived protein abundance data into multi-omics models
Develop ordinary differential equation (ODE) models of At3g22730-regulated pathways
Simulate system behavior under varying environmental conditions
Recent studies have successfully combined At3g22730 antibody-derived protein quantification with transcriptomic data to build predictive models of flowering time regulation under varying temperature conditions, demonstrating the power of these integrated approaches.
Using At3g22730 antibody to study developmental transitions requires careful experimental design:
Temporal Sampling Strategy:
Implement high-resolution time-course sampling around key developmental transitions
Correlate protein levels with morphological changes and molecular markers
Design synchronized germination protocols to reduce developmental variability
Tissue-Specific Analysis:
Dissect distinct tissues at transition points (e.g., shoot apex during floral transition)
Implement tissue-specific reporter lines to mark developmental boundaries
Correlate At3g22730 levels with cell identity markers
Environmental Condition Control:
Precisely control temperature, photoperiod, and other environmental variables
Design factorial experiments testing multiple transition-inducing conditions
Implement automated phenotyping to correlate molecular and morphological data
Genetic Background Considerations:
Compare At3g22730 dynamics across ecotypes with different developmental timing
Analyze protein behavior in mutants affecting developmental transitions
Generate complementation lines expressing modified versions of At3g22730
The correlation between At3g22730 downregulation and delayed flowering under elevated temperatures suggests its importance in thermomorphogenesis pathways. This makes the antibody particularly valuable for studying how environmental signals integrate with developmental programs to control transition timing in plants.
Recent advances in recombinant antibody technology offer opportunities to enhance At3g22730 research:
Single B Cell Antibody Generation:
Nanobody Development:
Generate camelid single-domain antibodies (nanobodies) against At3g22730
Express these intracellularly as "intrabodies" for real-time protein tracking
Fuse with fluorescent proteins for live-cell imaging
Bispecific Antibody Applications:
Create bispecific antibodies targeting At3g22730 and its interaction partners
Use for co-localization studies without secondary antibody cross-reactivity issues
Implement for targeted protein degradation approaches
Site-Specific Modifications: