MOTS-c Reference Guide: Mitochondrial Peptide for Metabolic Research
Published 2026-06-09 · 6 min read
MOTS-c (Mitochondrial Open Reading frame of the Twelve S rRNA-c) is a 16-amino-acid peptide encoded within the mitochondrial genome — making it one of the few peptides whose source DNA is outside the cell nucleus. This reference covers its origin, the research models where it most frequently appears, and practical lab-handling notes. Written for in-vitro and animal research only.
At a glance
- Class: Mitochondrial-derived peptide (MDP)
- Length: 16 amino acids
- Source DNA: Encoded within the 12S rRNA region of mitochondrial DNA
- Discovered: 2015 (Lee et al., USC)
- Primary research domains: Metabolic regulation, insulin sensitivity, mitochondrial biology, energy expenditure
Why mitochondrial encoding matters
Most studied peptides come from nuclear-encoded genes. MOTS-c breaks that pattern — its sequence is read directly from mitochondrial DNA inside the organelle. For researchers, this is significant because it implies a direct signaling pathway between mitochondrial function and whole-cell metabolism that does not route through the nucleus first. MOTS-c is the most-studied representative of the MDP class.
Research areas
- Insulin sensitivity: Animal model literature reports improved glucose handling and insulin response after MOTS-c administration in high-fat-diet rodent studies.
- Mitochondrial bioenergetics: Studies report MOTS-c modulates AMPK signaling, fatty-acid oxidation, and mitochondrial respiratory chain activity in cultured cells.
- Body composition research: In animal models, MOTS-c administration has been associated with reduced adipose accumulation and altered energy expenditure under controlled dietary conditions.
- Age-related metabolic decline: Endogenous MOTS-c levels decline with age in published assays — a frequent angle for longevity-related research.
- Exercise physiology research: Endogenous MOTS-c expression increases with exercise in rodent models, leading to studies of its role as a "mitokine" signal.
Solubility and reconstitution
MOTS-c is highly soluble in bacteriostatic water and reconstitutes cleanly with no foaming or particulate formation under proper handling.
| Vial | BAC water added | Concentration | Per 0.10 mL |
|---|---|---|---|
| 10mg MOTS-c | 2.0 mL | 5 mg/mL | 0.5 mg |
| 20mg MOTS-c | 2.0 mL | 10 mg/mL | 1.0 mg |
| 40mg MOTS-c | 4.0 mL | 10 mg/mL | 1.0 mg |
Stability and storage
- Lyophilized MOTS-c stored at 2–8°C, protected from light, is stable for the duration of the labeled shelf life.
- Reconstituted solutions are typically stable for ~30 days at refrigerated storage in bacteriostatic water.
- For longer storage, aliquot single-use volumes before freezing at −20°C. MOTS-c tolerates freezing well, but minimize freeze–thaw cycles to preserve activity.
Considerations for assay design
- AMPK pathway readouts. Many published MOTS-c results route through AMPK activation; ensure your assay can detect upstream and downstream AMPK signaling endpoints if mechanism is part of the hypothesis.
- Mitochondrial respiration measurements. Seahorse XF and equivalent OCR/ECAR assays are commonly used readouts in MOTS-c studies.
- Stable in serum-containing media. Studies have used MOTS-c in standard cell culture media with FBS without notable stability issues.
- Comparator selection. When comparing against other MDPs (humanin, SHLP family), source all comparators from matched, consistent batches to control cross-arm variance.
Research use disclaimer
Kalon Research does not provide Certificates of Analysis, purity reports, identity confirmation, or any other quality control documentation with shipments. MOTS-c is sold strictly for in-vitro and laboratory research use only. Buyer assumes all responsibility for product use, handling, storage, and any consequences thereof.
For Research Use Only. Not for human or animal consumption. Sold strictly for laboratory research purposes. All sales final.