What Is MOTS-C?

MOTS-C (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a mitochondria-derived peptide (MDP) encoded within the mitochondrial genome. It was identified relatively recently as part of an emerging class of mitochondria-encoded signalling molecules. Unlike most peptides, which are encoded in nuclear DNA, MOTS-C originates from the 12S ribosomal RNA region of the mitochondrial genome — a distinction that has made it a subject of considerable interest in molecular biology and cellular metabolism research.

MOTS-C is being investigated as a research tool in cell biology, metabolic pathway research, and mitochondrial function studies. It is supplied by TrueCanPeptides as a research-grade compound for qualified laboratory use only.

Mechanism of Action — Research Context

In preclinical studies, MOTS-C has been shown to translocate to the nucleus in response to metabolic stress, where it interacts with the AMPK (AMP-activated protein kinase) pathway — a key cellular energy sensor. This translocation behaviour is unusual for a mitochondria-derived molecule and has generated significant scientific interest regarding the communication loop between mitochondria and the nucleus in cellular homeostasis research.

Research in rodent models has investigated MOTS-C in the context of insulin sensitivity, glucose metabolism, and cellular stress responses. The peptide appears to modulate the one-carbon metabolic cycle and folate-methionine pathways, which are relevant to research on cellular energy management and oxidative stress.

Research Applications

• Mitochondrial biology: MOTS-C is studied as part of the mitochondrial-derived peptide (MDP) family, providing insight into how mitochondria communicate metabolic status to other cellular compartments.
• Metabolic pathway research: Preclinical investigations have examined MOTS-C in models of insulin resistance, glucose homeostasis, and energy substrate utilisation.
• Cellular stress models: Studies have explored MOTS-C in models of oxidative stress, examining its interaction with antioxidant pathways and mitochondrial membrane potential.
• Ageing research: Given mitochondrial decline is associated with cellular ageing models, MOTS-C has been studied in contexts relevant to longevity biology in preclinical settings.

All research applications require appropriate laboratory conditions and institutional oversight. This compound is not evaluated or approved for any clinical application.

View MOTS-C 40mg — Research Grade

Storage & Handling

Research-grade MOTS-C should be stored and handled according to standard peptide laboratory protocols:

• Store lyophilised powder at −20°C in a sealed, desiccated container away from light
• Reconstitute with sterile bacteriostatic water or an appropriate aqueous buffer per your laboratory SOP
• Reconstituted solution should be stored at 4°C and used within a defined window per your protocol
• Avoid repeated freeze-thaw cycles to preserve compound integrity

For detailed storage best practices, visit our Peptide Storage Guide. Our purity standards are outlined on the Quality & Purity page.

Related Research

MOTS-C belongs to the mitochondrial-derived peptide family, which also includes humanin and SHLP peptides. Researchers interested in mitochondrial signalling may also study Epithalon and NAD+ in the context of cellular longevity and mitochondrial function research. The AMPK signalling pathway that MOTS-C appears to interact with is also relevant to a broad range of metabolic biology research programs.

Browse the full research peptides in Canada category for related compounds and sourcing information.

Browse the TrueCanPeptides Research Hub for additional compound guides and educational content.

⚠️ Research Use Only: All content on this page is intended strictly for educational and informational purposes. This compound is not approved by Health Canada or any regulatory agency for human therapeutic use. TrueCanPeptides supplies research-grade compounds to qualified researchers only. This is not medical advice. Do not use any information here for self-administration, diagnosis, or treatment. Consult a licensed healthcare professional for any medical concerns.

See also: What is NAD+?

See also: What is SS-31?

MOTS-C: Discovery and Mitochondrial Origin

MOTS-C was identified in 2015 by Lee et al. in a landmark paper published in Cell Metabolism, establishing it as a novel mitochondria-derived peptide (MDP). Prior to this discovery, it was not known that the mitochondrial genome — a small circular DNA separate from the nuclear genome — could encode functional signalling peptides of metabolic relevance.

The mitochondrial genome contains only 37 genes, primarily encoding components of the oxidative phosphorylation machinery. MOTS-C was found to be encoded within the 12S ribosomal RNA gene — an unusual location for a peptide-coding sequence. Its discovery suggested that mitochondria communicate with the rest of the cell and body via peptide signalling molecules, a concept that has since expanded into a broader field of mitonuclear communication research.

MOTS-C Mechanism of Action

MOTS-C’s primary mechanisms investigated in research include:

AMPK Pathway Activation

In preclinical studies, MOTS-C has been shown to activate AMPK (AMP-activated protein kinase) — a master regulator of cellular energy homeostasis. AMPK activation is associated with increased glucose uptake, fatty acid oxidation, and mitochondrial biogenesis. MOTS-C’s AMPK-activating effects have been studied primarily in skeletal muscle and metabolic tissue cell models.

Folate Cycle and AICAR

Research has suggested that MOTS-C inhibits the folate cycle in mitochondria, leading to accumulation of AICAR (aminoimidazole carboxamide ribonucleotide) — an endogenous AMPK activator. This proposed mechanism provides a molecular link between mitochondrial metabolism and AMPK signalling, positioning MOTS-C as a potential mitonuclear signalling molecule.

Nuclear Translocation

A distinguishing feature of MOTS-C compared to most peptides is its ability to translocate to the cell nucleus under stress conditions. Research published in 2019 (Kim et al.) showed that MOTS-C can enter the nucleus and regulate adaptive nuclear gene expression in response to metabolic and oxidative stress — a behaviour rare among peptide molecules and suggestive of a broader regulatory role beyond simple receptor agonism.

MOTS-C Chemistry and Physical Properties

MOTS-C is a 16-amino-acid peptide with the sequence: MRWQEMGYIFYPRKLR.

• Sequence: Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg (MRWQEMGYIFYPRKLR)
• Molecular weight: ~2,174 Da
• Amino acids: 16
• Solubility: Soluble in water (recommended: bacteriostatic water or sterile water)
• Format: Lyophilized powder
• Storage: −20°C in sealed, desiccated vial; −80°C for long-term (>12 months)

MOTS-C in Metabolic and Aging Research

MOTS-C has become of particular interest in two overlapping research areas:

Metabolic Research

In rodent models, exogenous MOTS-C administration has been associated with improved insulin sensitivity, reduced fat accumulation, and protection against diet-induced metabolic dysfunction. These effects are thought to be mediated through the AMPK and AICAR mechanisms described above. Given the global research interest in metabolic disease biology, MOTS-C has attracted attention as a research tool for probing mitochondrial contributions to metabolic regulation.

Aging and Longevity Biology

MOTS-C levels have been reported to decline with age in human studies, which has led to interest in its potential role in age-associated metabolic decline. In older mouse models, MOTS-C has been studied for its effects on physical capacity and metabolic function. Research has also examined MOTS-C in the context of stress adaptation, as it appears to function as part of the mitochondrial stress response system.

It is important to note that the vast majority of MOTS-C research is in preclinical (cell and animal) models. Human clinical data remains limited and no therapeutic conclusions can be drawn from current research.

MOTS-C vs Related Mitochondrial Peptides

MOTS-C is one of several mitochondria-derived peptides (MDPs) that have been identified in recent years:

• Humanin: The first MDP identified (2003), studied in neuroprotection and metabolic research. 21 amino acids, also encoded in the 12S rRNA region.
• MOTS-C: 16 amino acids, studied in metabolic and longevity research. AMPK activator.
• SS peptides (Szeto-Schiller peptides): Synthetic mitochondria-targeting peptides (e.g., SS-31/Elamipretide), designed to target the inner mitochondrial membrane. Not mitochondrially-encoded but closely related in research focus.

The MDP field is relatively new and rapidly evolving. MOTS-C’s nuclear translocation behaviour in particular distinguishes it from classical receptor-targeting peptides and makes it a subject of ongoing mechanistic interest.

Reconstitution and Handling

• Reconstitution: Add bacteriostatic water or sterile water slowly; gently swirl to dissolve. Do not vortex.
• Volume calculation: For a 1 mg/mL concentration from a 40mg vial, add 40 mL of diluent. Adjust volume for desired research concentration.
• Storage post-reconstitution: 4°C for up to 30 days; prepare aliquots and freeze at −20°C if multiple uses planned.
• Protect from light: Tryptophan (Trp) residues in MOTS-C are light-sensitive; keep vials protected during handling.

Frequently Asked Questions

What does MOTS-C stand for?

MOTS-C stands for Mitochondrial Open Reading Frame of the 12S rRNA-c. The name describes its genomic origin: it is encoded within an open reading frame in the 12S ribosomal RNA gene of the mitochondrial genome, with “-c” denoting it is encoded in the mitochondrial genome.

How is MOTS-C different from other metabolic peptides like semaglutide or tirzepatide?

Semaglutide and tirzepatide are GLP-1 receptor agonists — they work by binding to specific cell surface receptors to modulate insulin secretion and appetite signalling. MOTS-C is a mitochondria-derived signalling peptide that activates intracellular energy sensing pathways (AMPK) and can translocate to the cell nucleus. These are mechanistically distinct approaches studied in metabolic research contexts.

Is there human research on MOTS-C?

There are observational human studies showing correlations between circulating MOTS-C levels and metabolic parameters, as well as some small intervention studies. However, the research is in early stages and no clinical conclusions should be drawn. The majority of mechanistic MOTS-C research is conducted in cell and animal models.

MOTS-C is supplied by TrueCanPeptides for qualified in vitro laboratory research purposes only. Not intended for human or animal administration. Not evaluated or approved by Health Canada for therapeutic use.

Related: MOTS-C 40mg | SS-31 10mg | What Are Peptides?