PAK3 (Ab-154) Antibody

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Product Specs

Form
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Lead Time
Typically, we can ship your order within 1-3 business days of receipt. Delivery times may vary depending on your location and the chosen shipping method. Please consult your local distributors for specific delivery times.
Synonyms
PAK3 antibody; OPHN3 antibody; Serine/threonine-protein kinase PAK 3 antibody; EC 2.7.11.1 antibody; Beta-PAK antibody; Oligophrenin-3 antibody; p21-activated kinase 3 antibody; PAK-3 antibody
Target Names
Uniprot No.

Target Background

Function
PAK3, a serine/threonine protein kinase, plays a crucial role in diverse signaling pathways, including cytoskeleton regulation, cell migration, and cell cycle regulation. Notably, PAK3 participates in dendrite spine morphogenesis, as well as synapse formation and plasticity. It functions as a downstream effector of the small GTPases CDC42 and RAC1. Upon binding to active CDC42 and RAC1, PAK3 undergoes a conformational change, leading to autophosphorylation on multiple serine and/or threonine residues. This activation enables PAK3 to phosphorylate MAPK4 and MAPK6, subsequently activating the downstream target MAPKAPK5, a key regulator of F-actin polymerization and cell migration. Furthermore, PAK3 phosphorylates TNNI3/troponin I, modulating calcium sensitivity and relaxation kinetics of thin myofilaments. PAK3 may also be involved in early neuronal development. In hippocampal neurons, PAK3 is essential for the formation of dendritic spines and excitatory synapses. This function is contingent on kinase activity and might be mediated through the regulation of actomyosin contractility via phosphorylation of myosin II regulatory light chain (MLC).
Gene References Into Functions
  1. The miR-193b-3p/PAK3 axis may serve as a potential novel therapeutic target for ovarian cancer. PMID: 29169729
  2. Researchers have identified mutations in PAK3, CASK, and MECP2, which are likely contributors to intellectual disability. These findings expand the spectrum of mutations and associated phenotypes related to X-linked intellectual disability. PMID: 28481730
  3. This study revealed significantly upregulated levels of PARK3 messenger RNA in subjects with schizophrenia, both in laminar and cellular samples. PMID: 25981171
  4. This study identified predicted pathogenic, hemizygous variants on chromosome X within disease genes, including PAK3. PMID: 25666757
  5. Cdc42Hs binds to the effector domain of PAK3. PMID: 25109462
  6. Results demonstrate elevated PAK3 expression at both the mRNA and protein level in cJun/AP-1-over-expressing Rat1a fibroblasts, as well as in transformed human fibroblasts. PMID: 23818969
  7. p21-Activated kinase 3 (PAK3) protein regulates synaptic transmission through its interaction with the Nck2/Grb4 protein adaptor. PMID: 21949127
  8. PAK3 may play a significant role in the progression of ACTH-producing thymic carcinoid. PMID: 20960100
  9. PAK3 is a key regulator of synapse formation and plasticity in the hippocampus. The MRX30 mutation may contribute to the cognitive deficits associated with this form of X-linked mental retardation. PMID: 15574732
  10. PAK3 mutations lead to a specific form of X-linked mental retardation characterized by fairly consistent clinical features. PMID: 18523455
  11. PAK3 encodes a splice variant that includes a 45-bp alternatively spliced exon. This exon encodes 15 amino acids that are inserted in the regulatory domain. PAK3b exhibits high kinase activity in starved cells, which is not further stimulated by active GTPases. PMID: 12464619

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Database Links

HGNC: 8592

OMIM: 300142

KEGG: hsa:5063

STRING: 9606.ENSP00000353864

UniGene: Hs.593599

Involvement In Disease
Mental retardation, X-linked 30 (MRX30)
Protein Families
Protein kinase superfamily, STE Ser/Thr protein kinase family, STE20 subfamily
Subcellular Location
Cytoplasm.
Tissue Specificity
Restricted to the nervous system. Highly expressed in postmitotic neurons of the developing and postnatal cerebral cortex and hippocampus.

Q&A

What is PAK3 protein and what cellular functions does it regulate?

PAK3 (p21-activated kinase 3) is a serine/threonine protein kinase that plays vital roles in multiple cellular signaling pathways. It functions as a critical regulator of cytoskeleton organization, cell migration, and cell cycle progression. In neuronal systems, PAK3 is particularly important for dendrite spine morphogenesis as well as synapse formation and plasticity. At the molecular level, PAK3 acts as a downstream effector of the small GTPases CDC42 and RAC1. When these GTPases bind to PAK3 in their active state, they induce conformational changes that lead to autophosphorylation of PAK3 on several serine and threonine residues, activating its kinase function .

PAK3 phosphorylates multiple downstream targets including MAPK4 and MAPK6, subsequently activating MAPKAPK5, which regulates F-actin polymerization and cell migration. Additionally, PAK3 phosphorylates TNNI3/troponin I, modulating calcium sensitivity and relaxation kinetics of thin myofilaments. Research also indicates PAK3 involvement in early neuronal development, making it a protein of significant interest in neuroscience research .

What are the key specifications of the PAK3 (Ab-154) Antibody?

The PAK3 (Ab-154) Antibody is a rabbit-derived polyclonal antibody that specifically detects endogenous levels of total PAK3 protein. It was generated using a synthesized non-phosphopeptide immunogen derived from human PAK3 surrounding the phosphorylation site of serine 154 (Y-M-S(p)-F-T) .

Key specifications include:

  • Host species: Rabbit

  • Clonality: Polyclonal

  • Species reactivity: Human, Rat, and in some formulations, Mouse

  • Applications: Western Blot (1:200-1:3000 dilution), ELISA (1:40000 dilution)

  • Molecular weight of target: 72 kDa

  • Purification method: Affinity-purified from rabbit antiserum using epitope-specific immunogen chromatography

  • Storage buffer: PBS (without Mg²⁺ and Ca²⁺), pH 7.4, 150mM NaCl, 0.02% sodium azide, and 50% glycerol

  • Concentration: Typically 1 mg/ml

How should PAK3 (Ab-154) Antibody be stored for optimal stability?

For optimal stability and performance, PAK3 (Ab-154) Antibody should be stored according to the following guidelines:

  • Store the unconjugated antibody at -20°C for long-term storage .

  • For conjugated versions (e.g., fluorophore-conjugated), store at 4°C in the dark for up to 6 months .

  • Aliquot the antibody upon receipt to minimize freeze-thaw cycles, as repeated freezing and thawing can damage antibody structure and reduce activity .

  • When handling the antibody, always keep it on ice and return to appropriate storage conditions promptly after use.

  • Prior to use, allow the antibody to equilibrate to room temperature and gently mix by inverting the vial several times (avoid vortexing to prevent protein denaturation) .

The antibody formulation, which includes 50% glycerol, helps maintain stability during freeze-thaw cycles, but minimizing these cycles is still recommended for optimal performance .

What is the detailed protocol for using PAK3 (Ab-154) Antibody in Western blot experiments?

When using PAK3 (Ab-154) Antibody for Western blot experiments, follow this methodological approach:

  • Sample Preparation:

    • Lyse cells in an appropriate buffer containing protease inhibitors

    • Determine protein concentration using a standard assay (Bradford, BCA, etc.)

    • Prepare samples containing 20-50 μg of total protein with loading buffer

    • Denature proteins by heating at 95°C for 5 minutes

  • Gel Electrophoresis and Transfer:

    • Separate proteins on 10-12% SDS-PAGE (PAK3 has a molecular weight of 72 kDa)

    • Transfer proteins to a PVDF or nitrocellulose membrane

    • Verify transfer using Ponceau S staining

  • Antibody Incubation:

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

    • Dilute PAK3 (Ab-154) Antibody at 1:500-1:3000 in blocking buffer

    • Incubate membrane with diluted primary antibody overnight at 4°C with gentle agitation

    • Wash membrane 3 times with TBST, 5 minutes each

    • Incubate with appropriate HRP-conjugated secondary antibody (anti-rabbit IgG) at 1:2000-1:5000 dilution for 1 hour at room temperature

    • Wash membrane 3 times with TBST, 5 minutes each

  • Detection:

    • Apply ECL substrate to the membrane

    • Detect signal using X-ray film or digital imaging system

    • PAK3 should appear as a band at approximately 72 kDa

How should cells be prepared for a cell-based ELISA using PAK3 (Ab-154) Antibody?

For a cell-based ELISA using PAK3 (Ab-154) Antibody, follow this protocol:

  • Cell Plating:

    • For adherent cells: Seed 20,000-30,000 cells in 200 μl culture medium per well in a 96-well plate

    • For suspension cells: First coat plates with 100 μl of 10 μg/ml Poly-L-Lysine for 30 minutes at 37°C, then add cells

    • Incubate overnight at 37°C, 5% CO₂ to achieve 75-90% confluence

  • Treatment and Fixation:

    • Apply experimental treatments as needed

    • Remove medium and rinse cells twice with 200 μl of 1× TBS

    • Fix cells with 100 μl of fixing solution (4% formaldehyde for adherent cells, 8% formaldehyde for suspension cells) for 20 minutes at room temperature

    • Seal plates with Parafilm during fixation

  • Antibody Incubation:

    • Wash 3 times with 200 μl of 1× Wash Buffer for 5 minutes each with gentle shaking

    • Add 50 μl of diluted PAK3 (Ab-154) Antibody to appropriate wells

    • Seal with Parafilm and incubate overnight at 4°C (or 2 hours at room temperature if target expression is known to be high)

    • Wash 3 times with 200 μl of 1× Wash Buffer for 5 minutes each

    • Add 50 μl of 1× HRP-Conjugated Anti-Rabbit IgG Antibody and incubate for 1.5 hours at room temperature with gentle shaking

    • Wash 3 times with 200 μl of 1× Wash Buffer for 5 minutes each

  • Detection:

    • Add 50 μl of Ready-to-Use Substrate to each well

    • Incubate for 30 minutes at room temperature in the dark with gentle shaking

    • Add 50 μl of Stop Solution to each well

    • Read optical density at 450 nm immediately

What positive and negative controls should be used with PAK3 (Ab-154) Antibody?

For rigorous experimental design with PAK3 (Ab-154) Antibody, incorporate the following controls:

Positive Controls:

  • Loading Control: Anti-GAPDH antibody to normalize protein loading in Western blots and cell-based assays. In cell-based ELISAs, include wells treated with Mouse Anti-GAPDH Antibody to normalize OD values of PAK3 .

  • Tissue/Cell Controls:

    • Rat or human brain tissue lysates, which naturally express PAK3

    • Neuronal cell lines (e.g., SH-SY5Y, PC12) that express endogenous PAK3

  • Recombinant PAK3 Protein: Include purified or overexpressed PAK3 protein when available to confirm antibody specificity

Negative Controls:

  • Antibody Controls:

    • Primary antibody omission: Replace PAK3 (Ab-154) Antibody with antibody diluent

    • Secondary antibody alone: Include wells with only HRP-Conjugated Anti-Rabbit IgG Antibody (without primary antibody)

  • Sample Controls:

    • PAK3 knockout or knockdown cells/tissues to confirm signal specificity

    • Cell lines known to have very low or no PAK3 expression

  • Peptide Competition: Pre-incubate PAK3 (Ab-154) Antibody with excess immunizing peptide (the non-phosphopeptide from human PAK3 around serine 154) to block specific binding

These controls help validate results and troubleshoot potential issues in experimental procedures .

How does PAK3 (Ab-154) Antibody compare to phospho-specific PAK3 antibodies in signaling pathway research?

PAK3 (Ab-154) Antibody and phospho-specific PAK3 antibodies serve complementary functions in signaling pathway research:

PAK3 (Ab-154) Antibody:

Phospho-specific PAK3 Antibodies (e.g., PAK3 phospho S154):

  • Specifically detect PAK3 only when phosphorylated at particular residues

  • Directly measure PAK3 activation state

  • Critical for studying signaling dynamics and kinase activation

  • Can be used to track temporal activation patterns following stimuli

Research Applications Comparison:

Research QuestionPAK3 (Ab-154)Phospho-PAK3
Total PAK3 expressionOptimalNot suitable
PAK3 knockout validationOptimalComplementary
Baseline normalizationPrimary toolNot suitable
Activation dynamicsLimited valuePrimary tool
Drug effects on expressionOptimalLimited value
CDC42/RAC1 signalingComplementaryPrimary tool

For comprehensive signaling pathway research, using both antibody types in parallel provides the most complete picture: PAK3 (Ab-154) establishes total protein levels while phospho-specific antibodies measure the proportion of activated PAK3. This approach is particularly valuable when studying complex neuronal signaling networks where both expression and activation states may change independently .

Can PAK3 (Ab-154) Antibody distinguish between PAK3 and its closely related family members PAK1 and PAK2?

The ability of PAK3 (Ab-154) Antibody to distinguish between PAK isoforms requires careful consideration:

  • Sequence Homology Analysis:

    • PAK1, PAK2, and PAK3 share significant sequence homology, particularly in functional domains

    • The region around serine 154 in PAK3 corresponds to similar regions in PAK1 (S144) and PAK2 (S141)

    • The exact degree of cross-reactivity depends on the uniqueness of the epitope sequence in this region

  • Validation Approaches:

    • Western blot analysis can help distinguish between isoforms based on molecular weight differences:

      • PAK1: ~68 kDa

      • PAK2: ~62 kDa

      • PAK3: ~72 kDa

    • Analysis of tissues with differential PAK isoform expression (e.g., PAK3 is enriched in brain tissue)

    • Use of PAK isoform-specific knockout/knockdown samples as controls

  • Alternative Strategies:

    • For studies requiring absolute isoform specificity, consider:

      • Using multiple antibodies targeting different epitopes

      • Employing immunoprecipitation followed by mass spectrometry

      • Implementing isoform-specific expression systems

While PAK3 (Ab-154) Antibody is designed to be specific for PAK3, researchers working on systems expressing multiple PAK isoforms should include appropriate controls to confirm specificity in their particular experimental context .

What are the considerations when using PAK3 (Ab-154) Antibody in neuronal tissue samples?

When using PAK3 (Ab-154) Antibody in neuronal tissue samples, several specific considerations should be addressed:

  • Tissue Preparation and Fixation:

    • Brain tissues require special fixation protocols to preserve epitope accessibility

    • For immunohistochemistry, paraformaldehyde fixation followed by antigen retrieval using EDTA buffer has shown success with PAK3 antibodies

    • Fresh-frozen sections may provide better epitope preservation than paraffin-embedded sections

    • For cultured neurons, 4% paraformaldehyde fixation for 15-20 minutes is typically suitable

  • Regional Expression Patterns:

    • PAK3 shows differential expression across brain regions

    • The cerebral cortex demonstrates particularly good immunoreactivity with PAK3 antibodies

    • Consider region-specific positive controls when analyzing restricted brain areas

  • Developmental Considerations:

    • PAK3 expression and subcellular localization change during neuronal development

    • PAK3 plays roles in early neuronal development, dendrite spine morphogenesis, and synapse formation

    • When studying developmental processes, age-matched controls are essential

  • Subcellular Localization Analysis:

    • In neurons, PAK3 localizes to specific subcellular compartments including dendritic spines

    • For high-resolution imaging, confocal or super-resolution microscopy may be required

    • Co-staining with neuronal markers (MAP2, βIII-tubulin) and synaptic markers (PSD-95, synaptophysin) can provide context for PAK3 localization

  • Protocol Optimization:

    • Extended primary antibody incubation (overnight at 4°C) often yields better results in brain tissue

    • Include detergents (0.1-0.3% Triton X-100) to enhance antibody penetration

    • Use sufficiently thin sections (10-20 μm) to ensure adequate antibody penetration

    • For immunohistochemistry, goat anti-rabbit IgG H&L (HRP) secondary antibody at 1:500 dilution has been validated

When studying PAK3 in neuronal contexts, these considerations help ensure specific and reproducible results that accurately reflect PAK3 biology in the nervous system .

What are potential causes of weak or absent signal when using PAK3 (Ab-154) Antibody in Western blot?

When encountering weak or absent signal with PAK3 (Ab-154) Antibody in Western blot experiments, systematically investigate these potential causes and solutions:

  • Sample Preparation Issues:

    • Problem: Insufficient protein extraction or degradation

    • Solution: Use fresh samples with complete protease inhibitor cocktails; optimize lysis buffer composition for neuronal tissues which may require specialized extraction buffers

  • Protein Loading and Transfer Problems:

    • Problem: Insufficient protein amount or incomplete transfer

    • Solution: Increase protein loading to 30-50 μg per lane; verify transfer efficiency with Ponceau S staining; optimize transfer conditions for high molecular weight proteins (72 kDa PAK3)

  • Antibody Dilution Optimization:

    • Problem: Suboptimal antibody concentration

    • Solution: Titrate antibody concentration; for weak signals, try higher concentrations (1:200-1:500) of primary antibody; extend incubation time to overnight at 4°C

  • Detection System Sensitivity:

    • Problem: Insufficient detection sensitivity

    • Solution: Use enhanced chemiluminescence (ECL) substrates with higher sensitivity; increase exposure time; consider signal amplification systems

  • Epitope Accessibility Issues:

    • Problem: Epitope masking or conformational changes during sample preparation

    • Solution: Modify denaturing conditions; try different reducing agents; consider non-reducing conditions if disulfide bonds affect epitope structure

  • Low Target Expression:

    • Problem: Low endogenous PAK3 expression in sample

    • Solution: Use positive control samples with known PAK3 expression (e.g., brain tissue lysates); consider immunoprecipitation to concentrate the target protein before Western blot

  • Antibody Storage and Handling:

    • Problem: Antibody deterioration

    • Solution: Ensure proper storage at -20°C; avoid repeated freeze-thaw cycles; prepare fresh working dilutions for each experiment

A systematic approach to troubleshooting, testing one variable at a time, will help identify and resolve issues with PAK3 (Ab-154) Antibody detection in Western blot applications.

How can conjugated versions of PAK3 (Ab-154) Antibody be optimized for multiplexing experiments?

Optimizing conjugated versions of PAK3 (Ab-154) Antibody for multiplexing experiments requires careful planning and validation:

  • Fluorophore Selection for Spectral Separation:
    The PAK3 (Ab-154) Antibody is available with various fluorophore conjugates including:

    • AF350 (Ex/Em: 346nm/442nm)

    • AF405 (Ex/Em: 401nm/421nm)

    • AF488 (Ex/Em: 493nm/519nm)

    • AF555 (Ex/Em: 555nm/565nm)

    • AF594 (Ex/Em: 591nm/614nm)

    • AF647 (Ex/Em: 651nm/667nm)

    • AF680 (Ex/Em: 679nm/702nm)

    • AF750 (Ex/Em: 749nm/775nm)

    Select fluorophores with minimal spectral overlap when designing multiplexing panels. For three-color multiplexing, consider combinations like AF488/AF594/AF647.

  • Protocol Optimization for Multiplexing:

    • Sequential Staining: For complex multiplexing, stain with one antibody at a time with washing steps between

    • Cocktail Approach: For compatible antibodies, prepare a mixture with carefully titrated concentrations

    • Blocking Strategy: Include extra blocking steps between antibody incubations to reduce cross-reactivity

    • Fixation Method: Optimize fixation to preserve all target epitopes without affecting fluorophore brightness

  • Controls for Multiplexed Experiments:

    • Single-Color Controls: Run each antibody alone to establish baseline signal and bleed-through profiles

    • Fluorescence-Minus-One (FMO) Controls: Include samples with all fluorophores except one to identify spillover

    • Isotype Controls: Use isotype-matched control antibodies conjugated to the same fluorophores

    • Absorption Controls: Pre-absorb antibodies with immunizing peptides to confirm specificity

  • Compensation and Analysis Considerations:

    • Instrument Calibration: Use calibration beads to normalize instrument performance

    • Compensation Matrix: Create a compensation matrix to mathematically correct for spectral overlap

    • Sequential Imaging: For microscopy applications, consider sequential rather than simultaneous acquisition

  • Signal Amplification Strategies:

    • For low-abundance targets, consider tyramide signal amplification (TSA) compatible with multiplexing

    • Biotin-conjugated primary antibody with fluorophore-conjugated streptavidin can enhance signal strength

When implementing these strategies, start with simple two-color experiments before advancing to more complex multiplexing panels .

How can PAK3 (Ab-154) Antibody be used to investigate PAK3's role in neuronal development?

PAK3 (Ab-154) Antibody can be leveraged in multiple experimental approaches to investigate PAK3's role in neuronal development:

  • Developmental Expression Profiling:

    • Perform Western blot analysis of brain tissue lysates from different developmental stages (embryonic, postnatal, adult) to quantify changes in PAK3 expression

    • Normalize PAK3 levels to housekeeping proteins and correlate with developmental milestones

    • Compare PAK3 expression across different brain regions during development using immunohistochemistry with PAK3 (Ab-154) Antibody at 1:500 dilution

  • Subcellular Localization During Neuronal Maturation:

    • Use immunocytochemistry on primary neuronal cultures at different days in vitro (DIV)

    • Track PAK3 localization changes during axon specification, dendrite outgrowth, and synapse formation

    • Perform co-localization studies with cytoskeletal markers (actin, tubulin) and synaptic markers (PSD-95, synaptophysin)

  • Activity-Dependent Regulation Studies:

    • Treat neuronal cultures with activity modulators (KCl, TTX, bicuculline)

    • Use cell-based ELISA with PAK3 (Ab-154) Antibody to quantify changes in PAK3 expression following activity modulation

    • Correlate changes in PAK3 levels with structural changes in developing neurons

  • Functional Manipulation Experiments:

    • Combine PAK3 knockdown/knockout approaches with rescue experiments

    • Use PAK3 (Ab-154) Antibody to validate knockdown efficiency

    • Perform morphological analysis of neurons (dendrite complexity, spine density) following PAK3 manipulation

    • Correlate structural changes with functional outcomes using electrophysiology

  • Interactome Analysis:

    • Use PAK3 (Ab-154) Antibody for immunoprecipitation of endogenous PAK3 complexes from developing neurons

    • Identify stage-specific interaction partners using mass spectrometry

    • Validate key interactions using co-immunoprecipitation and proximity ligation assays

This multifaceted approach can provide comprehensive insights into how PAK3 contributes to neuronal development, particularly in dendrite spine morphogenesis and synapse formation, which are critical for proper neural circuit formation .

What experimental approaches can measure PAK3 activation in response to CDC42/RAC1 signaling?

To measure PAK3 activation in response to CDC42/RAC1 signaling, researchers can implement these experimental approaches:

  • Combined Total and Phospho-Specific Antibody Analysis:

    • Use PAK3 (Ab-154) Antibody to measure total PAK3 levels

    • In parallel, use phospho-specific antibodies targeting PAK3 phospho-S154 to detect activated PAK3

    • Calculate the ratio of phosphorylated to total PAK3 as a measure of activation

    • This approach works well in Western blot, ELISA, and immunocytochemistry applications

  • GTPase Activation and PAK3 Response Assays:

    • Treat cells with CDC42/RAC1 activators (e.g., growth factors, cytokines)

    • Alternatively, express constitutively active mutants of CDC42/RAC1

    • Use PAK3 (Ab-154) Antibody in conjunction with phospho-specific antibodies to track PAK3 activation kinetics

    • Include GTPase inhibitors as negative controls

  • Kinase Activity Assays Following GTPase Activation:

    • Immunoprecipitate PAK3 using PAK3 (Ab-154) Antibody

    • Perform in vitro kinase assays using known PAK3 substrates

    • Compare kinase activity before and after CDC42/RAC1 activation

    • Use ATP consumption or substrate phosphorylation as readouts

  • FRET-Based Biosensors:

    • Design FRET biosensors that report on PAK3 conformational changes

    • Validate sensor responses using immunocytochemistry with PAK3 (Ab-154) Antibody

    • Measure real-time activation dynamics in living cells following GTPase activation

  • Downstream Substrate Phosphorylation:

    • Measure phosphorylation of PAK3 substrates like MAPK4, MAPK6, and MAPKAPK5

    • Use PAK3 (Ab-154) Antibody to normalize substrate phosphorylation to total PAK3 levels

    • Correlate substrate phosphorylation with GTPase activation state

  • Spatial Activation Analysis:

    • Perform super-resolution microscopy to visualize PAK3 relocalization following GTPase activation

    • Use PAK3 (Ab-154) Antibody alongside phospho-specific antibodies to track activation in specific subcellular compartments

    • Co-stain for active CDC42/RAC1 to correlate spatial activation patterns

These approaches collectively provide a comprehensive assessment of PAK3 activation dynamics in response to upstream GTPase signaling, offering insights into both the temporal and spatial aspects of PAK3 regulation .

How can PAK3 (Ab-154) Antibody be incorporated into studies of synapse formation and plasticity?

PAK3 (Ab-154) Antibody can be incorporated into synapse formation and plasticity studies through several advanced methodological approaches:

  • Synapse Density and Morphology Analysis:

    • Perform immunocytochemistry on cultured neurons using PAK3 (Ab-154) Antibody alongside synaptic markers

    • Quantify PAK3 levels at synaptic sites before and after plasticity-inducing stimuli

    • Correlate PAK3 abundance with spine head size, synaptic area, and receptor clustering

    • Use high-resolution microscopy (confocal, STED, STORM) for detailed morphological analysis

  • Activity-Dependent PAK3 Regulation:

    • Apply protocols that induce long-term potentiation (LTP) or depression (LTD)

    • Use PAK3 (Ab-154) Antibody in Western blot or ELISA to quantify changes in PAK3 expression

    • Perform immunohistochemistry on brain slices to analyze PAK3 redistribution following synaptic activity

    • Compare results between wild-type and disease model systems (e.g., intellectual disability models)

  • Molecular Complex Analysis at Synapses:

    • Use PAK3 (Ab-154) Antibody for immunoprecipitation from synaptosomal fractions

    • Identify PAK3-associated proteins at different stages of synapse formation

    • Perform proximity ligation assays to confirm in situ interactions between PAK3 and synaptic proteins

    • Analyze how these interactions change during synaptic plasticity

  • Functional Impact Assessment:

    • Manipulate PAK3 levels (overexpression, knockdown) in neuronal cultures

    • Use PAK3 (Ab-154) Antibody to confirm manipulation efficacy

    • Measure functional consequences through:

      • Electrophysiological recordings (mEPSCs, LTP/LTD)

      • Live calcium imaging during synaptic stimulation

      • AMPA receptor trafficking assays

    • Correlate functional outcomes with structural changes at synapses

  • Actin Cytoskeleton Regulation:

    • Visualize F-actin using fluorescent phalloidin alongside PAK3 (Ab-154) Antibody

    • Quantify colocalization between PAK3 and actin in dendritic spines

    • Track dynamic changes in both PAK3 localization and actin polymerization during structural plasticity

    • Use jasplakinolide or latrunculin to manipulate actin dynamics and assess effects on PAK3 distribution

These approaches leverage PAK3 (Ab-154) Antibody to reveal how PAK3 contributes to the structural and functional plasticity of synapses, which is fundamental to learning and memory processes in the brain .

What are the key advantages and limitations of using PAK3 (Ab-154) Antibody in research?

Advantages of PAK3 (Ab-154) Antibody:

  • Specificity and Versatility: Designed to detect endogenous levels of total PAK3 protein with demonstrated reactivity in human and rat samples, making it suitable for cross-species neurological research .

  • Multiple Application Compatibility: Validated for Western blot and ELISA applications with well-documented protocols, providing flexibility in experimental approaches .

  • Available Conjugates: Offered with various fluorophore conjugates (AF350, AF405, AF488, etc.), enabling multiplexed immunofluorescence studies and flow cytometry applications .

  • Defined Epitope: Generated against a well-characterized epitope around the serine 154 phosphorylation site, providing consistency in target recognition .

  • Complementarity to Phospho-Specific Antibodies: Can be used in conjunction with phospho-specific antibodies to provide a complete picture of both PAK3 expression and activation state .

Limitations and Considerations:

  • Potential Cross-Reactivity: Due to sequence homology between PAK family members, validation in specific experimental systems is recommended to confirm isoform specificity.

  • Application Restrictions: While validated for Western blot and ELISA, additional optimization may be required for other applications like chromatin immunoprecipitation or flow cytometry.

  • Storage Requirements: Requires -20°C storage and minimizing freeze-thaw cycles, necessitating proper laboratory infrastructure and sample handling .

  • Polyclonal Nature: Being polyclonal, batch-to-batch variability may occur, potentially requiring revalidation with new lots.

  • Limited Spatial Information: When used alone in signaling studies, provides information on expression but not activation state, requiring complementary approaches for complete understanding.

Understanding these advantages and limitations enables researchers to effectively incorporate PAK3 (Ab-154) Antibody into experimental designs while implementing appropriate controls to ensure reliable and interpretable results.

What emerging research areas might benefit from PAK3 (Ab-154) Antibody applications?

Several cutting-edge research areas could benefit significantly from the application of PAK3 (Ab-154) Antibody:

  • Neurodevelopmental Disorder Studies:

    • PAK3 mutations have been implicated in X-linked intellectual disability

    • PAK3 (Ab-154) Antibody can help characterize PAK3 expression and localization in patient-derived iPSC neurons

    • Comparative studies between healthy and disease models can reveal pathological mechanisms

    • Drug screening platforms targeting PAK3 pathways could utilize this antibody for efficacy validation

  • Synaptopathy Research:

    • Growing recognition of synapse dysfunction in psychiatric disorders

    • PAK3's role in spine morphogenesis positions it as a key molecule in synaptopathy research

    • PAK3 (Ab-154) Antibody enables quantitative assessment of PAK3 levels in different brain regions affected in synaptopathies

    • Single-cell analysis techniques incorporating this antibody could reveal cell-type specific vulnerabilities

  • Neural Circuit Development and Plasticity:

    • Emerging technologies combining connectomics with molecular profiling

    • PAK3 (Ab-154) Antibody could be integrated into array tomography or CLARITY-based whole-brain analyses

    • Correlation of PAK3 expression with circuit formation and remodeling in development and learning

    • Activity-dependent PAK3 regulation studies in defined neural circuits

  • Therapeutic Target Validation:

    • PAK3 inhibitors are being developed for various neurological conditions

    • PAK3 (Ab-154) Antibody provides a tool for target engagement studies

    • Quantification of PAK3 expression across tissues helps predict on-target and off-target effects

    • Biomarker development for patient stratification in clinical trials

  • Extracellular Vesicle (EV) Research:

    • Growing interest in neuron-derived EVs in intercellular communication

    • PAK3 (Ab-154) Antibody could detect PAK3 in EVs isolated from neuronal cultures or cerebrospinal fluid

    • Investigation of PAK3 as a potential cargo or surface marker for specific EV populations

    • Studies on EV-mediated transfer of signaling components between neurons

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