Compound Reviews
MOTS-c: A Mitochondrial-Derived Peptide
Encoded in mitochondrial DNA rather than the nuclear genome, MOTS-c sits at the centre of research on metabolic stress signalling.
Published August 2, 2026 · 6 min read
By Novanta Research
An unusual origin
MOTS-c is a sixteen-residue peptide encoded within the mitochondrial 12S rRNA gene. That makes it one of a small group of mitochondrial-derived peptides, alongside humanin and the SHLP family, whose existence complicated the assumption that mitochondrial DNA only encodes respiratory chain components.
Described signalling
The most frequently reported mechanism involves the folate–methionine cycle and AICAR accumulation, leading to AMPK activation. AMPK is the cell's low-energy sensor, so activating it shifts metabolism toward catabolic, energy-generating pathways.
Several papers also describe nuclear translocation of MOTS-c under metabolic stress, where it is reported to influence stress-response gene expression. This retrograde signalling model — mitochondria instructing the nucleus — is the conceptual reason the peptide attracts attention in ageing research.
Evidence status
Cell culture and rodent studies dominate. Human data are limited to observational measurements of endogenous levels in particular populations rather than controlled administration trials.
Compound references
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