MOTS-c // Mitochondrial Peptides and Metabolic Homeostasis

MOTS-c is one of a small family of peptides encoded not in the nuclear genome but within mitochondrial DNA itself. That origin makes it structurally and functionally distinct from every other metabolic peptide in the research catalogue.

A peptide from the mitochondrial genome

MOTS-c is a 16-residue peptide encoded within the 12S rRNA region of mitochondrial DNA. Its very existence rewrote the assumption that mitochondrial DNA encoded only components of the electron transport chain.

Functionally, MOTS-c behaves as a metabolic signalling molecule: it translocates to the nucleus under metabolic stress and modulates AMPK-dependent gene expression.

Why it belongs in metabolic research

In preclinical work, MOTS-c improves insulin sensitivity and shifts substrate utilisation toward fatty acid oxidation. What makes it interesting is not the direction of the effect but the mechanism — direct engagement of the AMPK pathway without receptor-mediated signalling.

That gives researchers a tool for probing AMPK-driven adaptation in isolation from the incretin and adipokine axes.

Stability

MOTS-c is more sensitive to freeze-thaw cycles than the incretin analogues. Aliquot reconstituted material and minimise repeated warming.