MtoZ Biolabs provides the 4D-Methylation Proteomics Service by integrating multidimensional separation and high-resolution mass spectrometry to decode protein methylation modification landscapes. Our service enhances methylated peptide coverage and residue-level site localization in complex samples, providing traceable, review-grade PTM evidence for target discovery and mechanistic insights.
Why Choose 4D Proteomics
4D proteomics delivers orthogonal separation for crowded LC-MS/MS signals by adding an ion-mobility to the traditional 3D LC-MS/MS analytical space (m/z + intensity + retention time). Protein methylation often features low abundance, coexistence with other acyl-lysine or methyl modifications, and a heavy co-eluting non-modified peptide background. In highly complex samples, standard LC-MS/MS acquisition can suffer from spectral congestion, ion suppression, and signal overlap that challenge confident site assignment and PTM state reading.
Meier et al. Mol Cell Proteomics. 2018.
Figure 1. 4D Proteomics
By layering ion mobility as a complementary gas-phase separation stage, 4D proteomics decouples peptide signals that share the same LC retention envelope but differ subtly in structure, charge, or conformation due to methylation states, enabling independent readouts for low-abundance PTMs. This multidimensional analytical space significantly increases sensitivity, usability, and residue-level localization confidence for methylated peptides within complex proteomes, including histone PTM studies.
Therefore, 4D separation is not only a strategy to scale coverage depth, but also a key approach to resolve methylated peptide signals more cleanly, reduce co-flow background influence, and secure reproducible site-level evidence for review and result validation in complex methyl-proteome and histone PTM programs.
4D-Methylation Proteomics Service at MtoZ Biolabs
Leveraging methyl-signal decoupling enabled by ion mobility, MtoZ Biolabs consolidates multidimensional advantages into the 4D-Methylation Proteomics Service to support protein-scale and histone-focused methyl-PTM analysis.
1. Methylation-Site Identification
High-confidence methylation-site identification through selective methyl-peptide enrichment and 4D-LC-MS/MS analytical platform.
2. Methylation Quantification
Robust methyl-PTM quantification by label-free or label-based strategies such as TMT or SILAC.
3. Proteome-Wide Methylation Profiling
Scalable coverage and clustering analysis for global methyl-peptide discovery in complex protein or histone PTM sets.
4. Customizable 4D-Methylation PTM Analysis
Tailored workflows for sample complexity and project goals, combining enrichment chemistries, optimized 4D parameter settings, flexible quantification methods, and result-level validation standards to ensure compatibility across target proteins or proteome-scale methyl-PTM analysis.
Workflow of 4D-Methylation Proteomics Service
Why Choose MtoZ Biolabs
1. High-Resolution Instrument Platforms
Outer-LC and gas-phase orthogonal separation using instrument platforms compatible with ion mobility such as advanced Orbitrap or timsTOF Pro, enabling review-grade spectral evidence depth with high quantitative stability.
2. Broad Biological Sample Compatibility
Compatible with cell lysates, tissue soluble supernatants, membrane solubilized proteins, immunoprecipitated complexes, and biological fluids.
3. Improved PTM Localization Reliability
4D space plus high-resolution mass spectrometry delivers tighter FDR control and traceable residue-evidence.
4. Cleaner PTM Signal Reading
Ion-mobility-layered separation compresses LC co-flow background to enable independent readouts for low-abundance methylated proteoforms.
Applications of 4D-Methylation Proteomics Service
1. Histone Methylation Research: Deep characterization of lysine-methyl modifications on core histones (H3, H4) supporting epigenetic regulation programs.
2. Methylation Mapping in Protein Complexes: Methyl-PTM detection and residue assignment for immunoprecipitated or purified protein complexes.
3. Stimulus-Responsive Methyl-PTM Quantification: Quantitative monitoring of methylation shifts driven by metabolic cues or signaling stimuli.
4. Signaling-Pathway-Associated Methylation Networks: Functional annotation of methylated proteins to inform molecular-phenotype transitions.
5. Multiple Biological Sample Types: Cell or tissue protein extracts with residue-level methylation evidence and quantitative stability.
Sample Submission Guidelines
For more information, please refer to Sample Submission Guidelines for Proteomics and Sample Submission Guidelines for Metabolomics.
FAQs
Q1: What types of samples are suitable?
The service is compatible with denatured cell or tissue protein lysates, membrane solubilized proteins, immunoprecipitated complexes, purified proteins, and PTM peptide standards. For complex biological mixtures, denaturing extraction and selective methyl-peptide enrichment prior to mass-spectral 4D analysis ensures higher reliability.
Q2: What is the service's general workflow?
Q3: What data formats are provided?
MtoZ Biolabs delivers 4D-Methylation results in multiple standardized data formats to meet diverse analytical and visualization needs, including:
- Mass spectrometry raw data files (raw or mzML)
- Methylation site identification matrix (csv / xlsx)
- Differential methylation quantification matrix (xlsx / csv)
- Pathway and functional enrichment results (xlsx)
- Chromatograms, ion mobility distribution maps, and spectral peak plots (TIFF / PNG high-resolution image formats)
- Structured result report (PDF)
If your project requires specific data formats, MtoZ Biolabs also supports custom data architectures and additional research-grade deliverables.
Q4: How should I prepare my samples?
To ensure consistent detection quality and reliable 4D separation performance, MtoZ Biolabs recommends preparing your samples according to the following guidelines:
1. Sample Types
Suitable for 4D-Methylation analysis are proteins from cell lysates, soluble tissue supernatants, membrane-solubilized proteins, immunoprecipitated (IP) complexes, purified proteins, or PTM peptide standards.
2. Purity and Interference Control
Samples should be clear and particle-free. Avoid high concentrations of salts, SDS, strong acids/bases, organic solvents, or any other reagents that may interfere with digestion, enrichment, or mass spectrometric analysis.
3. Protein Quality and Solubility
Provide fully dissolved protein supernatants. Extraction buffers should be compatible with denaturing digestion and PTM antibody or chemical enrichment workflows.
4. Storage and Transportation
Store biological samples at −80°C. Ship on dry ice in sealed containers to prevent thawing, leakage, or sample degradation.
5. Accompanying Documentation
Include detailed information such as sample origin, preparation method, buffer or solvent composition, experimental grouping design, target PTM type, and intended purpose of results (mechanistic study or PTM comparison).
If you are uncertain about sample preparation details, the MtoZ Biolabs technical team can provide customized guidance and sample submission templates prior to analysis.
Start Your Project with MtoZ Biolabs
Welcome to connect with MtoZ Biolabs and initiate your methyl-PTM research project with confidence.