EZR (Ab-353) Antibody

What is EZR (Ab-353) antibody and what cellular structures does it target?

EZR (Ab-353) antibody is a polyclonal antibody produced in rabbits that targets ezrin, a protein encoded by the EZR gene. Ezrin (also known as cytovillin, EZRI, VIL2, p81) is approximately 81 kDa in size and functions as a cytoskeletal linker protein. This protein is critically involved in connecting major cytoskeletal structures to the plasma membrane, particularly in epithelial cells where it contributes to the formation of microvilli and membrane ruffles on the apical pole. In conjunction with PLEKHG6, ezrin is essential for normal macropinocytosis, a form of endocytosis that involves the formation of large vesicles . The antibody specifically recognizes the region around amino acids 351-355 (sequence Q-D-Y-E-E) of human ezrin, making it valuable for studying ezrin's localization and function in cellular contexts .

What is the specificity and cross-reactivity profile of EZR (Ab-353) antibody?

EZR (Ab-353) antibody demonstrates confirmed reactivity with human and mouse samples. The antibody was generated using a synthetic peptide immunogen corresponding to the amino acid sequence surrounding position 353 of human ezrin (Q-D-Y-E-E) . The specificity is achieved through affinity purification methods, where antibodies are purified using epitope-specific peptide chromatography techniques . Researchers should note that while the antibody has been validated for these species, cross-reactivity testing in other experimental models may be necessary depending on sequence conservation in the target region across species. For optimal experimental design, preliminary validation in your specific experimental system is recommended to confirm reactivity and specificity.

What are the structural and functional characteristics of the ezrin protein targeted by EZR (Ab-353) antibody?

Ezrin, the target of EZR (Ab-353) antibody, belongs to the ERM (Ezrin/Radixin/Moesin) protein family and plays crucial roles in cellular architecture and signaling. Structurally, ezrin contains:

• An N-terminal FERM domain that interacts with membrane proteins

• A central α-helical region

• A C-terminal actin-binding domain

Functionally, ezrin:

• Serves as a molecular linker between the plasma membrane and actin cytoskeleton

• Is essential for microvilli formation in epithelial cells

• Participates in membrane ruffling on the apical cell surface

• Collaborates with PLEKHG6 to facilitate macropinocytosis

• Functions in signal transduction pathways

The specific epitope recognized by the EZR (Ab-353) antibody (aa.351-355) is located in a functionally important region of the protein, potentially affecting protein-protein interactions critical for ezrin's biological activities.

What are the validated applications for EZR (Ab-353) antibody and their recommended protocols?

EZR (Ab-353) antibody has been validated for multiple research applications with specific protocol recommendations:

For Western blot applications, researchers should prepare samples in standard SDS-PAGE loading buffer, resolve proteins on 8-10% gels (optimal for the ~81 kDa ezrin protein), and transfer to nitrocellulose or PVDF membranes. The antibody works effectively with overnight incubation at 4°C at the recommended dilutions in standard blocking buffer . For all applications, preliminary optimization of antibody concentration is advised for specific experimental conditions.

How should EZR (Ab-353) antibody be stored and handled to maintain optimal activity?

For optimal performance and longevity of EZR (Ab-353) antibody, proper storage and handling procedures are critical:

• Store the antibody at -20°C or preferably at -80°C for long-term storage

• Avoid repeated freeze-thaw cycles by preparing working aliquots upon receipt

• The antibody is typically supplied in phosphate buffered saline (without Mg²⁺ and Ca²⁺, pH 7.4) with 150mM NaCl, 0.02% sodium azide and 50% glycerol

• Some formulations contain PBS with 0.05% sodium azide and 50% glycerol at pH 7.3

• When working with the antibody, maintain cold chain practices, using ice or refrigeration during experiments

• For diluted working solutions, prepare fresh for each experiment or store at 4°C for short periods (1-2 days)

• Document lot numbers and performance characteristics for experimental reproducibility

Following these guidelines will help preserve antibody activity and ensure consistent experimental results across studies.

What controls should be included when using EZR (Ab-353) antibody in Western blot experiments?

A rigorous experimental design for Western blot using EZR (Ab-353) antibody should include the following controls:

• Positive Control: Cell lysates known to express ezrin (epithelial cell lines such as A431, MCF7, or HeLa are recommended)

• Negative Control:

  • Lysates from cells where ezrin expression is knocked down or knocked out

  • Pre-absorption control (antibody pre-incubated with immunizing peptide)

• Loading Control: Probing for housekeeping proteins (β-actin, GAPDH, tubulin) on the same membrane after stripping

• Molecular Weight Verification: Confirmation that the detected band appears at the expected molecular weight (~81 kDa for ezrin)

• Antibody Controls:

  • Primary antibody omission control

  • Secondary antibody-only control to assess non-specific binding

• Sample Processing Control: Both phosphatase-treated and untreated samples if examining phosphorylation states

Implementing these controls will ensure the specificity of the signal and support the reliability and reproducibility of your Western blot results when using EZR (Ab-353) antibody .

What are common issues when using EZR (Ab-353) antibody and how can they be resolved?

Researchers working with EZR (Ab-353) antibody may encounter several challenges. Here are common issues and their solutions:

• Weak or No Signal in Western Blot:

  • Increase antibody concentration (try 1:250 dilution)

  • Extend primary antibody incubation time (overnight at 4°C)

  • Increase protein loading (50-100 μg per lane)

  • Verify sample preparation (ensure protein is not degraded)

  • Check transfer efficiency using reversible protein stains

  • Use enhanced chemiluminescence (ECL) substrates with higher sensitivity

• High Background:

  • Increase blocking time or concentration (try 5% BSA instead of milk)

  • Use more stringent washing (add 0.1% Tween-20 to wash buffer)

  • Decrease primary antibody concentration (try 1:2000 dilution)

  • Filter buffers to remove particulates

  • Pre-absorb antibody with non-target proteins

• Multiple Bands:

  • Optimize sample preparation to reduce protein degradation

  • Use fresher antibody aliquots (avoid repeated freeze-thaw)

  • Validate bands using knockdown experiments

  • Consider the presence of ezrin isoforms or post-translational modifications

• Inconsistent Results:

  • Standardize lysate preparation protocols

  • Document lot-to-lot variations

  • Prepare master mixes of diluted antibodies

  • Maintain consistent incubation times and temperatures

How can researchers optimize EZR (Ab-353) antibody dilution for different sample types?

Optimizing antibody dilution is crucial for obtaining specific signals while minimizing background. For EZR (Ab-353) antibody:

• Titration Experiment Design:

  • Prepare a dilution series (1:250, 1:500, 1:1000, 1:2000, 1:5000)

  • Test with your specific sample types in parallel

  • Use the same detection method and exposure times for comparison

• Sample-Specific Considerations:

  • Cell lines: Start with the recommended 1:500-1:1000 dilution

  • Primary tissues: May require more concentrated antibody (1:250-1:500)

  • Mouse samples: Validate optimal dilution separately from human samples

  • Low-abundance targets: Consider using more concentrated antibody with enhanced detection systems

• Evaluation Metrics:

  • Signal-to-noise ratio

  • Specificity (single band at expected MW)

  • Reproducibility across replicates

• Documentation:

  • Record optimal dilutions for each sample type

  • Note lot number, as different lots may require different dilutions

  • Document incubation conditions that yield optimal results

How can EZR (Ab-353) antibody be used to study ezrin phosphorylation and its impact on cytoskeletal dynamics?

EZR (Ab-353) antibody can be strategically employed to investigate ezrin phosphorylation and its subsequent effects on cytoskeletal organization:

• Co-immunoprecipitation Studies:

  • Use EZR (Ab-353) antibody to pull down ezrin and associated proteins

  • Analyze phosphorylation status using phospho-specific antibodies

  • Identify binding partners that associate with different phosphorylation states

• Phosphorylation Analysis Protocol:

  • Treat cells with phosphatase inhibitors during lysis

  • Run parallel samples with/without phosphatase treatment

  • Separate samples on Phos-tag gels to resolve phosphorylated forms

  • Probe with EZR (Ab-353) antibody to detect mobility shifts

  • Validate with phospho-specific antibodies targeting known sites (T567)

• Cytoskeletal Dynamics Assessment:

  • Combine EZR (Ab-353) antibody with phalloidin staining for F-actin

  • Analyze colocalization patterns under different cellular conditions

  • Use live-cell imaging with fluorescently tagged ezrin constructs to complement antibody studies

  • Correlate ezrin phosphorylation state with membrane-cytoskeleton interactions

• Kinase Inhibitor Studies:

  • Test how different kinase inhibitors affect ezrin phosphorylation

  • Monitor changes in ezrin localization and cytoskeletal organization

  • Quantify the relationship between phosphorylation status and functional outcomes

This comprehensive approach enables researchers to unravel the complex regulatory mechanisms governing ezrin's role in cytoskeletal dynamics .

What approaches can be used to investigate ezrin's role in cell migration and invasion using EZR (Ab-353) antibody?

Investigating ezrin's role in cell migration and invasion requires multi-faceted experimental approaches:

• Knockdown/Overexpression Validation:

  • Use EZR (Ab-353) antibody to confirm successful knockdown/overexpression

  • Quantify changes in ezrin protein levels via Western blot

  • Conduct parallel immunofluorescence to examine subcellular localization changes

• Migration/Invasion Assay Integration:

  • Combine traditional assays (wound healing, Boyden chamber) with ezrin detection

  • Process samples at multiple timepoints to correlate ezrin expression/localization with migratory behavior

  • Use the antibody to analyze ezrin redistribution during directional migration

• Protein-Protein Interaction Analysis:

  • Perform co-immunoprecipitation with EZR (Ab-353) antibody

  • Identify migration-specific binding partners under different conditions

  • Validate interactions using proximity ligation assays in migrating cells

• Advanced Microscopy Applications:

  • Correlative light-electron microscopy using immunogold labeling with EZR (Ab-353)

  • Super-resolution microscopy to visualize ezrin at cell protrusions

  • FRAP (Fluorescence Recovery After Photobleaching) studies combined with antibody validation

• 3D Culture Systems:

  • Analyze ezrin distribution in 3D matrices using immunofluorescence

  • Correlate with invasion patterns and matrix remodeling

  • Compare with 2D findings to identify context-dependent functions

How can researchers utilize EZR (Ab-353) antibody in multi-omics approaches to understand ezrin's role in signaling networks?

Integrating EZR (Ab-353) antibody into multi-omics research approaches provides comprehensive insights into ezrin's signaling network:

• Immunoprecipitation-Mass Spectrometry (IP-MS):

  • Use EZR (Ab-353) antibody to immunoprecipitate ezrin complexes

  • Perform LC-MS/MS analysis to identify interacting proteins

  • Analyze samples from different cellular conditions to map context-dependent interactions

  • Protocol should include stringent controls (IgG control, ezrin-depleted samples)

• Phosphoproteomics Integration:

  • Immunoprecipitate ezrin using EZR (Ab-353) antibody

  • Analyze phosphorylation patterns via MS

  • Correlate findings with functional assays

  • Create phosphorylation-dependent interactome maps

• ChIP-Seq/ChIP-MS Applications:

  • Investigate ezrin's potential nuclear functions

  • Use EZR (Ab-353) antibody for chromatin immunoprecipitation

  • Analyze binding sites and associated proteins

  • Validate findings with orthogonal methods

• Spatial Proteomics Approach:

  • Combine subcellular fractionation with EZR (Ab-353) antibody detection

  • Map ezrin's distribution across cellular compartments

  • Correlate with interacting partners in each location

  • Develop a spatial-temporal map of ezrin function

• Data Integration Framework:

  • Cross-reference antibody-based findings with transcriptomics data

  • Create network visualizations of ezrin-dependent pathways

  • Validate key nodes using functional assays

  • Develop predictive models of ezrin's role in signaling networks

What factors should researchers consider when designing experiments to study ezrin-mediated membrane-cytoskeleton interactions?

When designing experiments to investigate ezrin's role in membrane-cytoskeleton interactions, researchers should consider:

• Cell Type Selection:

  • Choose models where ezrin has physiological relevance (epithelial cells, lymphocytes)

  • Consider polarized epithelial cells to study apical-specific functions

  • Include both normal and transformed cell variants to distinguish pathological changes

• Experimental Conditions:

  • Evaluate ezrin under both basal and stimulated conditions (growth factors, mechanical stress)

  • Include time course analyses to capture dynamic changes

  • Consider different confluence states, as ezrin function changes with cell density

• Technical Approaches:

  • Combine biochemical fractionation with EZR (Ab-353) antibody detection

  • Implement detergent extraction protocols to separate cytoskeletal-associated and soluble ezrin pools

  • Use complementary techniques (super-resolution microscopy, biochemical assays)

• Controls and Validations:

  • Include ezrin mutants (phosphomimetic, phospho-deficient) as functional controls

  • Use cytoskeleton-disrupting agents to confirm specificity of interactions

  • Validate key findings with secondary antibodies or alternative detection methods

• Quantification Strategies:

  • Develop rigorous quantification protocols for colocalization analyses

  • Use ratiometric approaches to measure membrane/cytosol distribution

  • Implement computer vision algorithms for unbiased assessment of morphological changes

How should researchers interpret variations in ezrin expression levels across different experimental systems?

Interpreting variations in ezrin expression requires careful consideration of multiple factors:

• Baseline Expression Assessment:

  • Quantify ezrin levels across cell types using standardized Western blot protocols with EZR (Ab-353) antibody

  • Normalize to multiple housekeeping proteins

  • Create a reference expression atlas for your experimental models

• Physiological Context Considerations:

  • Higher ezrin expression in epithelial and lymphoid cells reflects functional requirements

  • Expression correlates with microvilli abundance and membrane specialization

  • Developmental timing affects expression patterns

• Pathological Context Analysis:

  • Increased ezrin in certain cancers may indicate metastatic potential

  • Changes in ezrin/ERM family ratios may compensate for altered expression

  • Post-translational modifications may be more informative than total protein levels

• Technical Variation Management:

  • Run multi-cell line control panels with each experiment

  • Implement standard curves for absolute quantification

  • Document lot-to-lot antibody variation

  • Consider both mRNA and protein levels for comprehensive analysis

• Statistical Approach:

  • Perform power analysis to determine appropriate sample sizes

  • Use technical triplicates and biological replicates

  • Apply appropriate statistical tests for your experimental design

  • Consider non-parametric tests for highly variable systems

How can EZR (Ab-353) antibody be utilized in studying ezrin's role in immune cell function and immunological synapse formation?

EZR (Ab-353) antibody offers valuable approaches for investigating ezrin's functions in immune contexts:

• Immunological Synapse Analysis:

  • Implement immunofluorescence protocols to visualize ezrin localization during immune cell interactions

  • Combine with T cell receptor and actin staining to correlate with synapse organization

  • Use time-lapse imaging with fixed timepoint antibody validation

  • Quantify ezrin recruitment kinetics and correlation with functional outcomes

• Immune Cell Activation Studies:

  • Monitor ezrin phosphorylation status after immune cell stimulation

  • Correlate with cytoskeletal rearrangements and receptor clustering

  • Analyze differences between naive and memory cell populations

• Methodological Adaptations for Immune Cells:

  • Optimize fixation protocols (PFA vs. methanol) for different immune cell types

  • Adjust permeabilization conditions to preserve immunological synapse structure

  • Develop non-disruptive lysate preparation for activated vs. resting cells

• Advanced Immune Applications:

  • Study ezrin's role in immunodeficiencies using patient-derived samples

  • Investigate contributions to immune exhaustion phenotypes

  • Analyze ezrin redistribution during phagocytosis in macrophages and neutrophils

• Validation in Primary Immune Cells:

  • Test antibody performance in primary human and mouse lymphocytes

  • Optimize detection protocols for rare immune populations

  • Develop ezrin-based markers for specific immune cell activation states

What are the considerations for using EZR (Ab-353) antibody in high-content screening and drug discovery applications?

Implementing EZR (Ab-353) antibody in high-content screening requires specialized approaches:

• Assay Development Considerations:

  • Optimize antibody concentration for automated staining platforms

  • Determine minimum incubation times compatible with high-throughput workflows

  • Develop robust positive and negative controls for each plate

• Multiplexing Strategies:

  • Test compatibility with other antibodies for simultaneous detection

  • Optimize fluorophore selection to minimize spectral overlap

  • Develop sequential staining protocols when direct multiplexing isn't possible

• Image Acquisition Parameters:

  • Determine optimal exposure settings to capture ezrin dynamic range

  • Define appropriate z-stack parameters for 3D analysis

  • Establish auto-focus parameters for consistent imaging

• Quantification Algorithms:

  • Develop ezrin translocation measurements for cytoplasm-to-membrane shifts

  • Create ezrin phosphorylation readouts based on co-localization with phospho-specific antibodies

  • Implement machine learning approaches for pattern recognition

• Validation for Drug Screening:

  • Test with known ezrin modulators to establish assay sensitivity

  • Develop Z' factors and signal-to-background metrics

  • Implement quality control measures for antibody performance across plates

  • Create dose-response protocols for hit validation