What Is MOTS-c?

Overview

MOTS-c (mitochondrial open reading frame of the twelve-S rRNA type-c) is a 16-amino-acid peptide whose coding sequence sits inside the mitochondrial 12S ribosomal RNA gene (MT-RNR1). Rather than being made from a nuclear gene like most signalling peptides, it is one of a small family of mitochondrial-derived peptides that appear to let the mitochondrion communicate its energy status to the rest of the cell. In research models it is studied mainly as a regulator of metabolic homeostasis, where its activity tracks closely with cellular and metabolic stress.

How MOTS-c Works

The peptide's most-cited mechanism in laboratory work is activation of AMP-activated protein kinase (AMPK), the cell's central low-energy sensor. Through this pathway it has been observed to influence glucose uptake, insulin sensitivity and folate-methionine flux in cell and animal systems. Under metabolic stress, research also describes MOTS-c moving into the nucleus, where it can associate with stress-responsive transcription factors and shift the expression of nuclear genes — a retrograde signal from mitochondria back to the genome. This dual cytoplasmic-and-nuclear behaviour is what makes it a frequent subject in studies of energy sensing and the cellular stress response.

What the Research Explores

• AMPK-driven regulation of glucose metabolism and insulin sensitivity.
• Models of obesity, diet-induced metabolic dysfunction and type-2-diabetes-related insulin resistance.
• Exercise physiology, mitochondrial fitness and age-associated decline in muscle capacity.
• Retrograde mitochondrial-to-nuclear signalling and the cellular stress response.

Forms & Handling

For laboratory work MOTS-c is generally supplied as a lyophilized powder, with vials in this reference set offered at 10 mg, 20 mg and 40 mg. It is reconstituted with bacteriostatic or sterile water before any in-vitro use and kept refrigerated once dissolved, with frozen storage preferred for the unreconstituted powder over longer periods. The dosing protocols linked below carry the per-vial reconstitution math expressed in insulin-syringe units.

Safety & Research Notes

MOTS-c is an investigational research compound. It is not an FDA-approved drug, carries no labelled indication, and has no established human or veterinary safety profile. Because it engages glucose-handling pathways, the published literature flags theoretical interactions with metabolic medications as an open question rather than a characterised effect. Everything summarised here is mechanistic background drawn from pre-clinical and in-vitro studies, not a usage recommendation.

References

Related Protocols