MYL6 (myosin light chain 6) is part of the myosin hexamer complex, which includes two heavy chains, two nonphosphorylatable alkali light chains (e.g., MYL6), and two phosphorylatable regulatory light chains . The antibody targets endogenous MYL6 protein, enabling its detection in various experimental and diagnostic contexts .
Applications: Validated for Western blot (WB), immunohistochemistry (IHC), immunocytochemistry (IF/ICC), and ELISA .
A 2022 study identified anti-MYL6 antibodies as a subtype of anti-NET antibodies (ANETAs) that inhibit neutrophil extracellular trap (NET) formation by disrupting actin polymerization . Key findings:
Mechanism: Anti-MYL6 antibodies suppress G-actin-to-F-actin transition, reducing NET formation .
Clinical Impact:
Western Blot: Detects MYL6 at ~17–25 kDa, with recommended dilutions of 1:500–1:2000 .
Immunohistochemistry: Localizes MYL6 to cytosol and extracellular exosomes .
This antibody targets the regulatory light chain of myosin. It does not bind calcium.
MYL6 (Myosin Light Chain 6) is a 16.9 kDa protein encoded by the MYL6 gene in humans. It functions as an essential alkali light chain component of the myosin hexameric complex, which serves as a cellular motor protein with ATPase activity. MYL6 is expressed in smooth muscle and non-muscle tissues and plays crucial roles in cellular motility, cytoskeletal organization, and contractile functions. Research interest in MYL6 has grown due to its implication in various disease processes, including microscopic polyangiitis (MPA) and cancer cell migration, particularly in melanoma . The protein exists in multiple isoforms and is also known by several aliases including LC17, MLC3SM, ESMLC, LC17-GI, and LC17-NM .
| Characteristic | Polyclonal MYL6 Antibodies | Monoclonal MYL6 Antibodies |
|---|---|---|
| Source | Multiple B-cell clones | Single B-cell clone |
| Epitope recognition | Multiple epitopes | Single epitope |
| Cross-reactivity | Higher potential | Lower potential |
| Batch-to-batch variability | Higher | Lower |
| Applications | Broader range (WB, IHC, ICC, IP) | More specific applications |
| Common hosts | Rabbit | Mouse |
| Example catalogs | A09646 (Boster), PA5-106803 (Invitrogen) | 68142-1-Ig (Proteintech) |
When selecting between polyclonal and monoclonal antibodies, researchers should consider their experimental needs. Polyclonal antibodies like those from Boster Bio (A09646) offer greater sensitivity through multiple epitope recognition, making them suitable for detection of native proteins . Conversely, monoclonal antibodies such as Proteintech's 68142-1-Ig provide higher specificity and consistency, especially important for quantitative experiments or when differentiating between closely related proteins .
Most commercial MYL6 antibodies should be stored at -20°C for long-term preservation. For frequent use within one month, storage at 4°C is generally acceptable. The antibodies are typically supplied in buffer solutions containing stabilizers such as glycerol (often at 50%) and preservatives like sodium azide (0.02%) . It's crucial to avoid repeated freeze-thaw cycles as these can degrade antibody performance. For Boster Bio's A09646 antibody, the recommended storage is -20°C for one year, with short-term storage at 4°C for up to one month . Proteintech's preparation (68142-1-Ig) contains PBS with 0.02% sodium azide and 50% glycerol at pH 7.3 and is stable for one year after shipment when stored at -20°C . Aliquoting is generally unnecessary for -20°C storage of glycerol-containing preparations.
| Application | Recommended Dilution Range | Detection Method | Sample Types |
|---|---|---|---|
| Western Blot (WB) | 1:500-1:50,000 | Chemiluminescence | Cell lysates, tissue extracts |
| Immunohistochemistry (IHC) | 1:1,000-1:4,000 | DAB/AEC staining | FFPE tissues, frozen sections |
| Immunocytochemistry (ICC) | 1:500-1:2,000 | Fluorescent labeling | Fixed cells |
| Immunofluorescence (IF) | 1:500-1:2,000 | Fluorescent labeling | Tissues, cells |
| ELISA | Varies by manufacturer | Colorimetric/fluorescent | Serum, cell supernatants |
| Immunoprecipitation (IP) | Varies by manufacturer | Various | Cell/tissue lysates |
The optimal dilution should be determined empirically for each experimental setup. For Proteintech's monoclonal antibody (68142-1-Ig), Western blot applications can use dilutions from 1:5,000 to 1:50,000, while IHC applications typically require 1:1,000 to 1:4,000 dilutions . Reactivity has been confirmed across multiple species including human, mouse, rat, pig, and rabbit samples .
For optimal MYL6 immunohistochemistry, tissue-specific antigen retrieval methods are crucial:
Antigen Retrieval: For most tissues, heat-induced epitope retrieval (HIER) with TE buffer at pH 9.0 is recommended. Alternatively, citrate buffer at pH 6.0 may be used .
Tissue-Specific Considerations:
Heart tissues: Longer antigen retrieval times (20-25 minutes) may be necessary due to dense muscle structure
Skeletal muscle: Similar to heart tissue protocols
Kidney tissue: Standard protocols are typically sufficient
Colon tissue: May require gentler antigen retrieval to preserve morphology
Blocking and Antibody Incubation:
Signal Enhancement:
For tissues with low MYL6 expression, consider using amplification systems (e.g., tyramide signal amplification)
Adjust counterstaining intensity based on tissue type
The Proteintech monoclonal antibody (68142-1-Ig) has been validated for IHC in human colon, human kidney, rat heart, mouse heart, and mouse/rat skeletal muscle tissues .
Robust experimental design with appropriate controls is essential for reliable results with MYL6 antibodies:
Positive Controls:
Negative Controls:
Primary antibody omission: Replace primary antibody with host species IgG
Isotype control: Use matched isotype antibody (e.g., rabbit IgG for rabbit polyclonal antibodies)
Blocking peptide: Pre-incubate antibody with immunizing peptide to demonstrate specificity
Validation Controls:
Technical Controls:
For immunofluorescence studies, include DAPI nuclear counterstain and appropriate cytoskeletal markers (e.g., phalloidin for F-actin) to provide structural context .
Non-specific binding is a common challenge when working with MYL6 antibodies. To minimize this issue:
Optimize Blocking Conditions:
Increase blocking agent concentration (try 5% BSA or 5% non-fat milk)
Add 0.1-0.3% Triton X-100 to reduce hydrophobic interactions
Consider adding 5% normal serum from the secondary antibody host species
Extend blocking time to 2 hours at room temperature
Antibody Dilution Optimization:
Washing Protocol Modification:
Add higher salt concentration to wash buffer (up to 500 mM NaCl)
Increase number of washes and washing time
Add 0.05% Tween-20 to wash buffers
Sample Preparation Considerations:
For tissues with high endogenous biotin, use avidin/biotin blocking kit
Pre-absorb antibody with tissue powder from species of interest
For IHC, quench endogenous peroxidase with 3% H₂O₂ before antibody incubation
Control Experiments:
Remember that MYL6 has reported isoforms and various species variants, which may contribute to differential recognition patterns across sample types .
Multiple bands or unexpected molecular weights in MYL6 Western blots can be attributed to several biological and technical factors:
Biological Explanations:
Isoforms: MYL6 has two reported isoforms (expected at 16.9 kDa)
Post-translational modifications: Phosphorylation or other modifications may shift apparent molecular weight
Splice variants: Alternative splicing can generate variants with different sizes
Species differences: MYL6 variants exist across species, including human, mouse, rat, canine, and porcine
Technical Considerations:
Proteolytic degradation: Incomplete protease inhibition during sample preparation
Protein complexes: Incomplete denaturation may show higher molecular weight bands
Cross-reactivity: Antibody may recognize related myosin light chains
Non-specific binding: Particularly common with polyclonal antibodies
Troubleshooting Approaches:
Sample preparation: Use fresh protease inhibitor cocktail
Denaturing conditions: Increase SDS concentration or heating time/temperature
Reducing agents: Ensure sufficient DTT or β-mercaptoethanol in sample buffer
Gel percentage: Use higher percentage gels (15-20%) for better resolution of low molecular weight proteins
Transfer conditions: Optimize for small proteins (higher methanol concentration, lower voltage)
Antibody validation: Compare results with different antibodies targeting distinct epitopes
The observed molecular weight range for MYL6 is typically 17-25 kDa according to Proteintech's validation data . If bands appear outside this range, further validation is recommended to confirm specificity.
Weak or absent signals in MYL6 immunofluorescence staining can be addressed through a systematic troubleshooting approach:
Fixation and Permeabilization Optimization:
Fixation method: Compare paraformaldehyde (4%) with methanol fixation
Fixation time: Test different durations (10-20 minutes)
Permeabilization: Adjust Triton X-100 concentration (0.1-0.5%)
Epitope accessibility: Try different antigen retrieval methods (heat, enzymatic)
Antibody Incubation Conditions:
Concentration: Decrease dilution factor (use more concentrated antibody)
Incubation time: Extend to overnight at 4°C
Temperature: Room temperature vs. 4°C incubation
Antibody selection: Try different clones or polyclonal vs. monoclonal
Signal Enhancement Strategies:
Amplification systems: Tyramide signal amplification
Brighter fluorophores: Switch to higher quantum yield fluorophores
Mounting media: Use anti-fade mounting media with signal enhancers
Blocking optimization: Reduce background to improve signal-to-noise ratio
Microscopy and Imaging Parameters:
Exposure settings: Increase exposure time
Gain settings: Increase detector gain
Objectives: Use higher NA objectives for better light collection
Image processing: Apply appropriate deconvolution algorithms
Biological Considerations:
Expression levels: Confirm MYL6 expression in your cell type or tissue
Subcellular localization: MYL6 may have specific localization patterns
Cell treatment: Some stimuli may alter MYL6 expression or localization
For validated protocols, researchers have successfully used anti-MYL6 polyclonal antibody incubated overnight at 4°C, followed by secondary antibody coupled with Alexa Fluor 488, with simultaneous ActinRed 555 and DAPI counterstaining for 20 minutes at room temperature .
MYL6 antibodies have proven valuable in studying neutrophil extracellular trap (NET) formation, particularly regarding the role of actin rearrangement in this process:
Experimental Design for NET Formation Studies:
Neutrophil isolation: Obtain peripheral blood neutrophils using density gradient separation
NET induction: Stimulate with phorbol 12-myristate 13-acetate (PMA, 20 nM)
Treatment groups: Include anti-MYL6 antibody (0.5 μg/mL) vs. control IgG
Time course analysis: Assess NET formation at multiple timepoints (30 min, 1h, 3h, 4h)
Visualization and Quantification Methods:
DNA staining: DAPI to visualize extracellular DNA traps
NET markers: Co-stain for citrullinated histone H3 to confirm NET identity
Actin dynamics: Use phalloidin staining (e.g., Acti-stain 555) to visualize F-actin
G-actin visualization: Anti-β-actin antibody to track G-actin distribution
Quantification: Measure percentage of NET-forming cells and NET area
Mechanistic Insights from Anti-MYL6 Intervention:
The presence of anti-MYL6 antibody disrupts G-actin polymerization into F-actin
This disruption suppresses PMA-induced NET formation
The effect suggests myosin-actin interaction is necessary for NET formation
The approach allows temporal analysis of cytoskeletal changes during NET formation
Controls and Validation:
Isotype control: Use matched host species IgG (e.g., rabbit IgG)
Positive control: Confirm NET formation with PMA alone
Specificity validation: Confirm effects with multiple anti-MYL6 antibodies
These methodologies have revealed that anti-MYL6 antibody can suppress NET formation by disrupting actin rearrangement, specifically by interfering with G-actin polymerization into F-actin, which appears essential for NET formation .
Anti-MYL6 antibodies have emerged as important biomarkers and potential pathogenic factors in autoimmune disease research, with particular significance in microscopic polyangiitis (MPA):
Detection of Serum Anti-MYL6 Antibodies in Patients:
ELISA methodology: Recombinant human MYL6 immobilization on plates
Patient stratification: Identifying anti-MYL6 antibody-positive vs. negative MPA patients
Prevalence data: Found in approximately 7 of 59 patients with MPA (11.9%)
Cutoff determination: Using mean+1.5 standard deviation of healthy controls
Clinical Correlations with Anti-MYL6 Antibody Status:
Disease activity: Lower Birmingham vasculitis activity score (BVAS) in antibody-positive patients
Organ involvement: Significantly lower cutaneous, cardiovascular, and nervous system involvement
Treatment response: Higher remission rates 6 months after initiation of therapy
Renal and pulmonary manifestations: No significant differences between antibody-positive and negative groups
Mechanistic Implications in MPA Pathophysiology:
NET interference: Anti-MYL6 antibodies disrupt NET formation
Potential protective role: May limit tissue damage by reducing excessive NET formation
Prognostic marker: Potential utility in predicting disease course and treatment response
Diagnostic significance: May help identify a distinct subgroup of MPA patients
Experimental Approaches for Studying Anti-MYL6 in MPA:
In vitro NET assays: Comparing NET formation between patient groups
Serum transfer experiments: Testing pathogenicity in animal models
Actin dynamics studies: Examining cytoskeletal effects in neutrophils
Therapeutic implications: Potential for targeted approaches based on MYL6 biology
This research has significant implications for understanding MPA heterogeneity, with anti-MYL6 antibody positivity potentially identifying a subgroup with distinct clinical manifestations and better prognosis .
MYL6 antibodies provide valuable tools for investigating cancer cell migration mechanisms, especially in melanoma where MYL6 plays a critical role:
Experimental Models for Studying MYL6 in Melanoma Migration:
Cell lines: SkMel28, MeWo, A375, SkMel30 melanoma cells
Gene manipulation: ADCK2 knockdown affects MYL6 expression
Migration assays: Wound healing/scratch assays to quantify migration capacity
Molecular pathway analysis: Linking ADCK2-MYL6 axis to migration phenotypes
Immunofluorescence Applications in Migration Studies:
MYL6 visualization: Anti-MYL6 antibody with Alexa Fluor 488 secondary antibody
Cytoskeletal co-labeling: ActinRed 555 for F-actin visualization
Nuclear counterstaining: DAPI for cell localization
Quantitative image analysis: Measuring MYL6 expression levels and subcellular distribution
Mechanistic Studies Using MYL6 Antibodies:
Expression correlation: Visualizing reduced MYL6 after ADCK2 knockdown
Rescue experiments: MYL6 knockdown negates effects of ADCK2 overexpression
Functional connections: ADCK2 appears upstream of MYL6 in regulatory pathway
Migration phenotype: Increased migration after MYL6 knockdown in ADCK2 overexpressing cells
Clinical Correlations from Database Analysis:
Expression data mining: Positive correlation between ADCK2 and MYL6 expression in melanoma
Survival analysis: Lower MYL6 expression correlates with poorer survival outcomes
Prognostic implications: Potential utility as biomarker for melanoma progression
These studies have revealed that MYL6 is functionally connected to ADCK2, with ADCK2 knockdown reducing MYL6 expression by 40-80% in melanoma cells. This reduction correlates with altered migration capacity, suggesting MYL6 as a critical mediator of migration control in melanoma .
| Antibody Source | Catalog # | Host/Type | Validated Applications | Species Reactivity | Epitope/Immunogen | Special Features |
|---|---|---|---|---|---|---|
| Proteintech | 68142-1-Ig | Mouse/Monoclonal | WB, IHC, IF/ICC, ELISA | Human, mouse, rat, pig, rabbit | MYL6 fusion protein | High dilution range (1:5000-1:50000 for WB) |
| Boster Bio | A09646 | Rabbit/Polyclonal | WB | Human, mouse, rat | Synthetic peptide (aa 101-146) | 1mg/ml concentration in PBS with glycerol |
| Invitrogen/ThermoFisher | PA5-106803 | Rabbit/Polyclonal | Multiple | Human, mouse, rat | Proprietary | Detects endogenous levels of total MYL6 |
| Sigma-Aldrich | HPA046859 | Rabbit/Polyclonal | IHC (1:1000-1:2500) | Human | MTEEEVEMLVAGHEDSNGCINYEAF | Prestige Antibody validated by Human Protein Atlas |
| Biomatik | CAU23345 | Rabbit/Polyclonal | WB, IHC, ICC, IP | Human | Phe4~Arg146 | Comprehensive application range |
Selection criteria should be based on your specific experimental needs:
For detection across multiple species, Proteintech's monoclonal antibody offers the broadest validated reactivity
For highly sensitive Western blots, the high dilution range of Proteintech's antibody suggests superior sensitivity
For immunohistochemistry applications, Sigma's HPA046859 offers validation through the Human Protein Atlas project
For comprehensive epitope coverage, polyclonal options from Boster Bio or Biomatik may be preferable
The choice between monoclonal and polyclonal should consider the trade-off between specificity (favoring monoclonal) and sensitivity (often higher with polyclonal antibodies).
Rigorous validation of new MYL6 antibody batches is essential for experimental reproducibility:
Initial Characterization:
Concentration measurement: Absorbance at 280nm or BCA/Bradford assay
Purity assessment: SDS-PAGE with Coomassie staining
Immunoglobulin class verification: ELISA or immunodiffusion
Storage buffer composition check: pH and additive concentrations
Functional Validation by Application:
Western blot:
Compare with previous batch using identical samples
Verify expected molecular weight (16.9-25 kDa)
Test across multiple sample types (cell lines, tissues)
Perform loading curve to determine sensitivity
Immunohistochemistry/Immunofluorescence:
Side-by-side staining with previous batch
Assess staining pattern and intensity
Test on known positive tissues (heart, muscle)
Include negative controls (primary antibody omission)
ELISA (if applicable):
Standard curve comparison with previous batch
Determine EC50 values
Assess background signal levels
Cross-reactivity testing
Specificity Confirmation:
Documentation Requirements:
Validation image capture: Store raw and processed images
Detailed protocol recording: All conditions and reagents
Batch information documentation: Lot number, date, expiration
Performance metrics quantification: Signal-to-noise ratio, specificity scores
For example, when testing a new MYL6 antibody batch for Western blot, validation should include heart tissue samples from multiple species and cell lines such as A549 and HeLa, which serve as reliable positive controls .
Contradictory results between different MYL6 antibodies require systematic investigation to resolve discrepancies:
Comprehensive Antibody Characterization:
Epitope mapping: Identify which region of MYL6 each antibody targets
Clone/lot information: Document all antibody details and sources
Application optimization: Each antibody may require different conditions
Format differences: Consider differences between conjugated vs. unconjugated forms
Systematic Experimental Comparison:
Side-by-side testing: Use identical samples and protocols
Dilution series: Test each antibody across a range of concentrations
Protocol variations: Systematically modify fixation, blocking, incubation conditions
Positive controls: Include samples with confirmed high MYL6 expression
Biological Explanations for Discrepancies:
Isoform specificity: Different antibodies may recognize different MYL6 isoforms
Post-translational modifications: Some epitopes may be masked by phosphorylation
Protein interactions: Complexed MYL6 may hide certain epitopes
Tissue/cell-specific expression patterns: Expression may vary between samples
Validation Experiments to Resolve Contradictions:
Recombinant protein testing: Test against purified MYL6 protein
Knockdown/overexpression: Compare antibody signals in manipulation experiments
Mass spectrometry validation: Confirm protein identity in immunoprecipitated samples
Multi-omics correlation: Compare antibody results with RNA-seq or proteomics data
Interpretation and Decision Framework:
Consensus approach: Focus on findings consistent across multiple antibodies
Literature cross-reference: Compare with published results using the same antibodies
Application-specific selection: Different antibodies may be optimal for different applications
Biological context consideration: Interpret results within your experimental system
For example, contradictory results in MYL6 expression patterns might be explained by the antibodies recognizing different forms of MYL6 (e.g., one recognizing total MYL6 while another detecting only non-phosphorylated forms). In such cases, using complementary techniques like RT-qPCR can help resolve protein-level discrepancies .
The current understanding of MYL6's role in actin dynamics and cellular motility has evolved significantly through recent research:
Molecular Interactions and Functions:
Myosin complex formation: MYL6 serves as an alkali light chain in the myosin hexameric complex
Actin binding regulation: Influences myosin-actin interactions during contractile processes
G-actin polymerization: Anti-MYL6 antibodies disrupt G-actin polymerization into F-actin
Cytoskeletal reorganization: Essential for cell shape changes during migration
Cellular Processes Mediated by MYL6:
NET formation: Critical for neutrophil extracellular trap formation
Cancer cell migration: Controls melanoma cell motility
Contractile functions: Important in smooth muscle and non-muscle contractility
Cytoskeletal dynamics: Regulates dynamic actin rearrangements
Regulatory Mechanisms:
ADCK2 connection: ADCK2 appears upstream of MYL6 in regulatory pathways
Expression control: ADCK2 knockdown reduces MYL6 expression by 40-80%
Functional relationship: MYL6 knockdown negates effects of ADCK2 overexpression
Pathway integration: Part of complex signaling networks controlling cell motility
Experimental Evidence from Recent Studies:
Anti-MYL6 antibody effects: Disrupts actin reorganization and NET formation
Migration assays: Altered migration capacity correlates with MYL6 expression levels
Visualization studies: Immunofluorescence confirms subcellular distribution patterns
Gene expression correlations: ADCK2 and MYL6 expression show positive correlation
These findings collectively suggest that MYL6 functions as a critical regulator of actin dynamics, particularly in processes requiring cytoskeletal reorganization such as cell migration and specialized functions like NET formation .
MYL6 antibodies show promising potential for novel diagnostic and therapeutic applications based on emerging research:
Diagnostic Applications:
Autoimmune disease stratification: Identifying anti-MYL6 antibody-positive MPA patients (11.9% prevalence)
Prognostic biomarker: Anti-MYL6 antibody positivity correlates with lower disease activity and better treatment response
Cancer progression assessment: MYL6 expression levels as indicator of melanoma aggressiveness
Tissue-specific pathology: Evaluation of cytoskeletal abnormalities in muscle disorders
Potential Therapeutic Approaches:
NET formation modulation: Targeting MYL6 to control excessive NET formation in inflammatory diseases
Migration inhibition: Disrupting MYL6 function to reduce cancer cell motility and metastasis
Autoantibody neutralization: Developing decoy targets for pathogenic anti-MYL6 antibodies
Cytoskeletal stabilization: MYL6-targeted approaches for disorders involving abnormal cellular contractility
Drug Development Considerations:
Target validation: MYL6 antibodies as tools to validate the target in disease models
Mechanism studies: Elucidating pathways amenable to pharmacological intervention
Biomarker development: Companion diagnostics for treatment selection
Screening platforms: High-throughput systems using MYL6 antibodies for compound screening
Challenges and Future Research Needs:
Specificity requirements: Ensuring targeted approaches don't disrupt essential functions
Delivery methods: Developing strategies to target intracellular MYL6
Combination approaches: Integrating MYL6-targeted therapies with existing treatments
Long-term effects: Understanding consequences of chronic MYL6 modulation
Current evidence suggests particularly promising applications in autoimmune vasculitis, where anti-MYL6 antibodies appear to define a distinct patient subgroup with lower disease activity and better treatment response . In cancer research, the connection between MYL6 and cell migration suggests potential for targeting metastatic processes .
Methodological innovations for studying MYL6 functions across cellular contexts continue to evolve:
Advanced Imaging Techniques:
Super-resolution microscopy: Visualizing MYL6 interactions at nanoscale resolution
Live-cell imaging: Tracking MYL6 dynamics during cellular processes in real-time
Correlative light-electron microscopy (CLEM): Combining functional and ultrastructural information
Expansion microscopy: Physical expansion of specimens for enhanced resolution
Genetic Manipulation Approaches:
CRISPR/Cas9 genome editing: Generating precise MYL6 knockouts or mutations
Inducible expression systems: Temporal control of MYL6 expression
Domain-specific mutations: Structure-function analysis of MYL6 domains
Cell-specific conditional knockouts: Tissue-specific MYL6 deletion in animal models
Protein Interaction and Functional Analysis:
Proximity labeling: BioID or APEX2 tagging to identify MYL6 interaction partners
Single-molecule pull-down: Analyzing individual MYL6 complexes
Advanced mass spectrometry: Identifying post-translational modifications and interaction networks
Optical tweezers/force spectroscopy: Measuring mechanical properties of MYL6-containing structures
Translational Research Techniques:
Patient-derived organoids: Studying MYL6 in disease-relevant 3D models
Single-cell analysis: Examining MYL6 expression heterogeneity in tissues
Multi-omics integration: Correlating MYL6 protein data with transcriptomics and metabolomics
AI-assisted image analysis: Automated quantification of MYL6 localization patterns
Emerging Application-Specific Methods:
Microfluidic migration assays: Precisely quantifying migration in response to MYL6 manipulation
NET formation quantification: Automated analysis of NET components and structures
Traction force microscopy: Measuring cell-generated forces dependent on MYL6 function
Intravital microscopy: Observing MYL6-dependent processes in living organisms