MOTS-C 40mg Pen

Our 40mg pen contains MOTS-C, a naturally occurring 16-amino-acid mitochondrial-derived peptide (MDP) first identified in 2015. Unlike most peptides, which are encoded by nuclear DNA, MOTS-C originates from a short open reading frame within the mitochondrial 12S rRNA region.

This unusual origin has made MOTS-C an important research compound for studying communication between mitochondria and the rest of the cell. Experimental work has investigated its relationship with cellular metabolism, AMPK signalling, skeletal muscle function and the way cells respond when energy availability changes.

What Is MOTS-C?

MOTS-C stands for Mitochondrial Open Reading Frame of the Twelve S rRNA type-c. It consists of 16 amino acids with the sequence MRWQEMGYIFYPRKLR.

Mitochondria are best known for their role in cellular energy production, but the discovery of MOTS-c helped demonstrate that mitochondrial DNA can also encode small signalling molecules with biological activity.

MOTS-C belongs to a wider group known as mitochondrial-derived peptides, which also includes Humanin and the Small Humanin-Like Peptides (SHLPs).

Rather than functioning as a conventional hormone with one clearly defined receptor, MOTS-C has been investigated for its influence on metabolic pathways and communication between mitochondrial and nuclear systems.

Why Is MOTS-C Researched?

The original research that identified MOTS-C found that it influenced metabolic homeostasis and insulin sensitivity in experimental models. Skeletal muscle appeared to be an important target tissue.

Researchers found that MOTS-C affected the folate cycle and de novo purine biosynthesis. These changes reduced intracellular nucleotide availability and contributed to activation of AMP-activated protein kinase (AMPK).

AMPK acts as an important cellular energy sensor. It responds when cellular energy availability changes and helps coordinate processes involved in nutrient utilisation and metabolic adaptation.

This connection between a mitochondrial-encoded peptide and AMPK opened a wider area of research into how mitochondria may actively communicate metabolic information rather than functioning solely as energy-producing organelles.

MOTS-C And Metabolic Research

Some of the best-known MOTS-c findings come from animal models examining metabolic dysfunction.

In the original 2015 study, MOTS-C administration prevented both age-dependent and high-fat-diet-induced insulin resistance in mice. The researchers also reported protection against diet-induced obesity.

These findings led to further investigation into areas including:

• Glucose utilisation in skeletal muscle
• Insulin sensitivity and metabolic regulation
• Cellular adaptation during nutrient stress
• AMPK-associated energy sensing

These observations come primarily from preclinical research and should not be interpreted as established weight-loss, diabetes or metabolic-health benefits in humans.

MOTS-C And Mitochondrial Function

More recent work has provided further detail on the relationship between MOTS-C and mitochondrial biology.

A 2026 study investigated its effects on skeletal muscle mitochondrial bioenergetics and reported improvements in mitochondrial performance through mechanisms dependent on AMPK and PGC-1α. Researchers also observed lower mitochondrial reactive oxygen species emission and reduced stress-related protein damage.

PGC-1α is a transcriptional coactivator closely involved in mitochondrial biogenesis and metabolic adaptation. Its relationship with MOTS-c provides another research route for understanding how mitochondrial signalling may influence the way cells respond to changing energy requirements.

Mitochondrial-To-Nuclear Signalling

MOTS-C is also studied as an example of retrograde signalling, where information originating within mitochondria influences activity elsewhere in the cell.

Under certain metabolic stress conditions, experimental research has reported movement of MOTS-c into the cell nucleus. There, it has been associated with changes in nuclear gene expression related to cellular stress and metabolic adaptation.

This is scientifically significant because mitochondria contain their own DNA but depend heavily on genes within the nucleus. Understanding communication between these two genetic systems is therefore an important part of mitochondrial biology.

Pen Format & Storage

Our 40mg MOTS-C Pen is supplied as a prepared pen-based formulation intended for controlled laboratory research.

The MOTS-C sequence contains amino acids that can be susceptible to oxidation, including methionine and tryptophan. Stable storage conditions and protection from excessive heat and direct light are therefore important when maintaining research material.

Store the pen according to the refrigerated conditions provided with the individual product specification and avoid unnecessary temperature fluctuations.

Disclaimer: This product is supplied strictly for laboratory research purposes only. Not for human or animal consumption.