In 2015, a team led by Dr. Changhan David Lee at the University of Southern California discovered a 16 amino acid peptide encoded within mitochondrial DNA - the first known peptide to be encoded by the mitochondrial genome and act as a systemic signalling molecule. They named it MOTS-c (Mitochondrial Open Reading Frame of the Twelve S rRNA type-c). Since then, it has become one of the most closely watched compounds in longevity and metabolic research.
Nearly all peptides studied in research are encoded by nuclear DNA. MOTS-c is different - it originates from the mitochondrial genome, specifically from a short open reading frame within the 12S rRNA gene. This makes it part of a small family of "mitochondrial-derived peptides" (MDPs) that also includes Humanin and SHLPs.
Why it matters: Mitochondria are the cell's energy producers. The fact that they encode and secrete signalling peptides that regulate systemic metabolism suggests a direct communication channel between cellular energy status and whole-body metabolic regulation. This has profound implications for understanding how aging and metabolic dysfunction develop.
MOTS-c's primary mechanism is activation of AMP-activated protein kinase (AMPK), often called the "master metabolic switch." AMPK is the cell's energy sensor - when activated, it shifts the cell toward catabolic (energy-producing) pathways and away from anabolic (energy-consuming) processes.
MOTS-c activates AMPK by inhibiting the folate-methionine cycle, which leads to accumulation of the intermediate AICAR - a potent endogenous AMPK activator. This indirect activation mechanism is notable because AICAR accumulation mimics the metabolic state of exercise.
A remarkable 2020 finding showed that MOTS-c physically translocates into the cell nucleus under metabolic stress. Once inside the nucleus, it directly regulates gene expression by interacting with transcription factors and modifying chromatin. This is the first known example of a mitochondrial-encoded peptide entering the nucleus to regulate nuclear gene expression - a form of retrograde signalling between organelles.
Through AMPK activation and nuclear gene regulation, MOTS-c influences:
MOTS-c has been described as an "exercise mimetic" - a compound that reproduces some of the molecular effects of physical exercise. Animal studies have shown that MOTS-c administration activates the same AMPK-dependent pathways triggered by endurance exercise, including enhanced glucose uptake, improved mitochondrial function, and increased fatty acid oxidation. Notably, MOTS-c levels in skeletal muscle increase during exercise, suggesting it may be part of the body's natural exercise-response signalling.
Circulating MOTS-c levels decline with age in both humans and animal models. In aged mice, MOTS-c treatment improved physical performance, restored metabolic parameters to younger levels, and enhanced cellular stress resistance. Studies of exceptionally long-lived human populations (centenarians) have identified specific MOTS-c genetic variants (m.1382A>C) that are enriched in these groups, suggesting a genetic link between MOTS-c function and longevity.
In diet-induced obesity models, MOTS-c administration prevented weight gain, improved glucose tolerance, and reduced hepatic fat accumulation. These effects were mediated through AMPK activation in skeletal muscle and liver tissue.
Recent research has identified MOTS-c as a regulator of osteoblast differentiation and bone formation. It promotes bone mineralisation through activation of the TGF-beta/Smad signalling pathway, opening a new research avenue in age-related bone loss.
What makes MOTS-c particularly compelling for longevity researchers is the convergence of several observations:
In published animal studies, MOTS-c is typically administered via intraperitoneal injection at doses of 5-15 mg/kg. Human-equivalent dosing extrapolations from these studies are the subject of ongoing research. The peptide is typically reconstituted in bacteriostatic water and stored at 2-8°C. Use the reconstitution calculator to confirm draw volumes, and always verify batch quality by reading the COA.
What is MOTS-c?
MOTS-c is a 16 amino acid peptide encoded by mitochondrial DNA - the first known peptide from the mitochondrial genome that acts as a systemic signalling molecule. It was discovered in 2015 by Dr. Changhan David Lee at USC.
How does MOTS-c work?
It primarily activates AMP-activated protein kinase (AMPK), the cell’s master metabolic switch, by inhibiting the folate-methionine cycle. This mimics the metabolic state of exercise. It can also translocate into the cell nucleus to directly regulate gene expression.
Why is MOTS-c relevant to longevity research?
MOTS-c levels decline with age, its supplementation reverses age-related metabolic dysfunction in animal models, specific genetic variants are enriched in centenarians, and it activates AMPK - the same pathway triggered by caloric restriction and exercise.
Lab-verified MOTS-c in 10-vial packs, tested by Janoshik and Freedom Diagnostics.
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