TMT-Based Peptidomics Analysis Service

What Is TMT-Based Peptidomics Analysis?

Peptidomics focuses on naturally occurring or endogenous peptides present in biological samples. Unlike conventional bottom-up proteomics, which enzymatically digests proteins before LC-MS/MS analysis, endogenous peptidomics aims to preserve the peptide sequences already present in the sample and quantify them directly at the peptide level.

 

Tandem Mass Tag (TMT) labeling provides an isobaric chemical labeling strategy for comparing peptide abundance across multiple predefined samples. Peptides from individual samples are labeled separately, combined, and analyzed by LC-MS/MS. During tandem mass spectrometry, TMT reporter ions generate sample-specific quantitative signals, allowing relative peptide abundance to be compared across experimental groups. The key analytical output is therefore peptide-level relative abundance rather than direct protein abundance or absolute peptide concentration.

Li, J. et al.  Nat Methods. 2020.

Figure 1. Overview of TMT Reagents for Sample Multiplexing

MtoZ Biolabs provides a TMT-Based Peptidomics Analysis Service using high-resolution Orbitrap mass spectrometry platforms, including Orbitrap Exploris 480 and Orbitrap Fusion Lumos, coupled with advanced LC separation systems. Supported by an experienced proteomics and peptidomics team, we provide support from endogenous peptide preparation and TMT labeling to LC-MS/MS analysis, peptide identification, relative quantification, differential peptide screening, and downstream data interpretation, helping researchers resolve peptide-level changes and prioritize candidates for further investigation.

When This Service Is a Good Fit

TMT-based peptidomics analysis service is particularly useful when the study focuses on endogenous peptide changes across clearly defined experimental groups. Common study scenarios include:

1. Multi-Group Endogenous Peptide Comparison

Compare relative peptide abundance across multiple predefined biological groups within a coordinated analytical workflow.

2. Treatment and Perturbation Studies

Evaluate endogenous peptide responses to drug treatment, environmental exposure, genetic perturbation, or other experimental interventions.

3. Time-Course Peptidomics

Track dynamic changes in peptide abundance across multiple experimental time points.

4. Phenotype Comparison

Identify peptide-level differences between phenotypes, biological states, strains, or experimental models.

5. Biofluid Peptide Profiling

Compare endogenous peptide profiles in biological fluids such as serum or plasma when peptide-level differences are the primary research target.

6. Candidate Peptide Discovery

Screen differentially abundant peptides and prioritize candidates for subsequent targeted verification or functional investigation.

TMT suitability still depends on sample number, sample matrix, available peptide material, grouping structure, and the intended analytical outcome. Project evaluation before labeling is therefore recommended.

Workflow of TMT-Based Peptidomics Analysis Service

1. Sample Evaluation and Endogenous Peptide Preparation

Biological matrices or pre-extracted peptide samples are evaluated according to project requirements. Where peptide extraction is included in the project scope, endogenous peptides are isolated and cleaned up using an appropriate sample-preparation strategy. 

2. Peptide Cleanup and Normalization

Peptide samples are prepared for labeling with attention to sample compatibility, peptide recovery, and consistency across experimental groups.

3. TMT Labeling

Peptides from individual samples are labeled with different TMT reagents. TMT reagents react with accessible primary amines, allowing labeled samples to generate distinct reporter-ion signals during tandem mass spectrometry.

4. Sample Pooling

After labeling, individual peptide samples are combined into a pooled sample for subsequent LC-MS/MS analysis.

5. High-Resolution LC-MS/MS

TMT-labeled peptides are chromatographically separated and analyzed by high-resolution tandem mass spectrometry to obtain peptide identification and reporter-ion information.

6. Peptide Identification and Relative Quantification

Mass spectrometry data are processed to identify peptide sequences and compare TMT reporter-ion intensities across experimental groups.

7. Differential Peptide Analysis and Reporting

Relative quantitative results are evaluated according to predefined group comparisons to identify peptides showing relevant abundance differences.

Figure 2. Workflow of TMT-Based Peptidomics Analysis Service

Why Choose MtoZ Biolabs?

1. High Throughput and High Precision

By employing TMT labeling technology, multiple samples can be analyzed simultaneously with high throughput, and mass spectrometry enables the acquisition of high-precision quantitative data, making it suitable for peptide analysis in complex biological samples.

2. High Sensitivity and Accuracy

TMT labeling combined with mass spectrometry technology allows for accurate detection of changes in low-abundance peptides, ensuring both sensitivity and accuracy of the quantitative results.

3. Flexible Customized Solutions

Personalized experimental design solutions are provided based on the client's research needs, including sample grouping, labeling strategies, and data analysis modules, to meet the requirements of research across various fields.

4. One-Stop Service

A full-process service is offered, covering sample preparation, TMT labeling, mass spectrometry analysis, data processing, and biological interpretation, simplifying experimental procedures and improving research efficiency.

Applications

1. Endogenous Peptide Dynamics

Investigate changes in naturally occurring peptide populations across biological states or experimental conditions.

2. Proteolytic Processing Research

Characterize peptide fragments associated with protein processing and degradation patterns.

3. Signaling and Regulatory Peptide Research

Explore condition-dependent changes in endogenous signaling or regulatory peptides.

4. Drug and Treatment Response Research

Compare peptide abundance changes following experimental compound treatment or other interventions.

5. Peptide Biomarker Candidate Discovery

Identify differentially abundant peptide candidates for subsequent research and targeted verification.

6. Physiological and Disease-Model Research

Study peptide-level differences associated with physiological states, experimental disease models, or biological phenotypes.

Sample Submission Suggestions

1. Sample Amount

Sample quality and starting amount can directly affect endogenous peptide recovery and downstream TMT-based peptidomics analysis. The following quantities can be used as general submission references.

Sample Type	Recommended Quantity	Minimum Quantity
Animal Tissue	50-100 mg	25-50 mg
Tumor Tissue	60 mg	30 mg
Plant Tissue	1-5 g	0.5-2 g
Cell Pellet	1 × 10⁷ cells	5 × 10⁶ cells
Microbial Samples	100 μL	50 μL
Serum/Plasma	100 μL	50 μL
Urine	2 mL	1 mL
Culture Supernatant	10 mL	5 mL
Protein Solution	2 mg	1 mg

2. Storage and Shipping

• Collect and process all experimental groups under consistent conditions.
• Freeze prepared samples promptly and store at −80°C when applicable.
• Avoid repeated freeze–thaw cycles.
• Ship frozen samples on dry ice and maintain low temperature throughout transportation.
• Seal and label sample tubes securely to prevent leakage, contamination, or misidentification.

Sample requirements may vary depending on sample matrix, experimental design, available material, and the intended quantitative analysis. Project-specific evaluation is recommended before sample submission.

Deliverables

1. Peptide Identification

Identified peptide sequences and corresponding mass spectrometry evidence.

2. Relative Peptide Quantification

TMT reporter-ion-based quantitative values across samples and experimental groups.

3. Differential Peptide Results

Peptides showing abundance differences according to predefined statistical and fold-change criteria.

4. Data Visualization

Project-appropriate visualizations such as quantitative distributions, clustering heatmaps, correlation analysis, and differential peptide plots.

5. Peptide Annotation

Available peptide information may be linked to source proteins or other relevant annotations when appropriate reference information is available.

6. Project Report

Methods, quality-control information, quantitative results, figures, and analytical summaries are compiled into the project report.

FAQ

Q1. Does TMT-Based Peptidomics Analysis Service provide absolute peptide concentrations?

Standard TMT reporter-ion analysis provides relative quantification across samples or groups. Absolute peptide quantification generally requires appropriate standards and a targeted quantitative strategy.

Q2. What can affect TMT labeling efficiency?

Peptide amount, buffer composition, pH, contaminants, and availability of reactive primary amines can affect labeling. In particular, primary amine-containing buffers can compete with peptides for TMT reagents.

Q3. Is TMT Labeling Applicable to All Types of Peptides?

TMT labeling is applicable to most peptides, especially those containing lysine and N-terminal residues. Different peptides and samples may vary in labeling efficiency, so for peptides that are difficult to label, it may be necessary to optimize experimental conditions. We recommend providing relevant sample information to develop the optimal experimental plan.

Q4. Does TMT-Based Peptidomics Analysis Service Support the Analysis of Post-Translationally Modified (PTM) Peptides?

We support the analysis of post-translationally modified (PTM) peptides, such as phosphorylation, acetylation, and glycosylation. By incorporating PTM enrichment strategies, the detection sensitivity and accuracy of these modified peptides can be improved.

Start Your Project

Planning a comparative endogenous peptide study? MtoZ Biolabs offers free project consultation to evaluate whether TMT-based peptidomics analysis service is suitable for your study.

To support project evaluation, please provide your species, sample type, sample number, experimental groups, biological replicates, whether peptides have already been extracted, available peptide amount or concentration if known, planned comparisons, and primary research objective.

Our team can evaluate sample compatibility, TMT labeling requirements, quantitative strategy, and downstream analytical needs before quotation and project setup.