MOTS-c: The Mitochondria-Encoded Peptide in Metabolic Research

MOTS-c belongs to a small family of peptides encoded by mitochondrial DNA rather than the cell nucleus. That origin makes it scientifically unusual and explains much of the interest in it.

What MOTS-c is

MOTS-c is a 16-amino-acid peptide encoded within the mitochondrial 12S rRNA gene. It was described in 2015. Together with humanin, it is one of the best-studied mitochondrial-derived peptides (MDPs) — a group that suggests mitochondria send signals to the rest of the cell and possibly to other tissues.

MOTS-c is not a licensed medicine. Research material is for laboratory use only.

What the research looks at

• AMPK activation. In cell models, MOTS-c is reported to inhibit the folate cycle and de novo purine synthesis. That leads to a build-up of AICAR, an AMP mimic, which activates AMP-activated protein kinase (AMPK), the cell's energy sensor.
• Nuclear translocation. Under metabolic stress, MOTS-c has been reported to move into the nucleus and influence the expression of stress-response genes. This is a striking example of mitochondria-to-nucleus communication.
• Skeletal muscle metabolism. Rodent studies measure glucose uptake, insulin sensitivity and exercise-related markers.
• Ageing models. Circulating levels appear to change with age in some studies, which links MOTS-c to ageing research.

Related compounds

• NAD+ and SS-31 are also studied in mitochondrial research, but through different mechanisms: NAD+ as a coenzyme, SS-31 as a cardiolipin-binding peptide.
• AICAR is a direct AMPK activator, which is useful as a comparison tool.

Limits of the evidence

Most MOTS-c data come from cell culture and rodents. The proposed mechanisms are still being refined, and human data are limited. Online claims about "resetting metabolism" go well beyond what has been published.

Comparing MOTS-c listings

1. Verify identity. A 16-mer is easy to mislabel. Check that the mass-spec result matches the expected mass of about 2.17 kDa.
2. Compare price per mg on our MOTS-c comparison page. Vial sizes vary widely.
3. Check storage and shipping. See our guide to how research peptides are stored and handled.

Summary

MOTS-c is a mitochondrial-derived peptide studied for its role in cellular energy sensing and stress signalling. The research is promising but early. PeptideCompare provides no dosing or usage guidance, and nothing here is for human or veterinary use.