MOTS-C: Research Overview, Mechanism of Action & Lab Supply Standards
A summary of published preclinical research on MOTS-C — a mitochondrial-derived peptide studied for its role in metabolic regulation, insulin sensitivity, and age-related physiological endpoints.
What Is MOTS-C?
MOTS-C (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a peptide encoded within the mitochondrial genome — specifically within the 12S ribosomal RNA gene. It was identified and characterized by Chang et al. at the University of Southern California in 2015 as part of a broader discovery of mitochondria-derived peptides (MDPs).
MOTS-C consists of 16 amino acids and is produced endogenously in response to metabolic stress signals. Circulating MOTS-C levels have been shown to decline with age in rodent models and have been associated with various metabolic parameters in observational human studies. All research material supplied by ACCUTIDE is for laboratory use only — no human clinical trial data exists for exogenous MOTS-C administration.
Proposed Mechanisms of Action
AMPK Pathway Activation
MOTS-C's most consistently documented mechanism is activation of AMP-activated protein kinase (AMPK) in skeletal muscle. AMPK is a master metabolic regulator that promotes glucose uptake, fatty acid oxidation, and mitochondrial biogenesis. MOTS-C appears to function as a mitochondria-to-nucleus signaling molecule that triggers AMPK activation in response to metabolic stress.
Insulin Sensitivity Modulation
Rodent studies have documented improved insulin sensitivity following MOTS-C administration, with particular effects in skeletal muscle glucose uptake. The 2015 Cell Metabolism study demonstrated that MOTS-C-treated mice on a high-fat diet showed significantly improved insulin tolerance compared to controls — a finding that has driven subsequent research into the peptide's metabolic applications.
Mitochondrial Biogenesis
MOTS-C has been associated with upregulation of PGC-1α, a key transcriptional coactivator that drives mitochondrial biogenesis. This pathway is of significant interest to longevity and exercise physiology researchers, as mitochondrial density and function are established markers of metabolic health in aging models.
Folate Cycle & Methionine Metabolism
A distinct proposed mechanism involves MOTS-C's interaction with the folate cycle — specifically its ability to inhibit the de novo purine biosynthesis pathway in a manner that redirects metabolic flux. This interaction with one-carbon metabolism is proposed as a mechanism underlying MOTS-C's effects on cellular energy sensing.
Selected Published Research
Lee C, et al. — Cell Metabolism, 2015
Foundational study identifying MOTS-C as a novel mitochondria-encoded peptide. Documents MOTS-C's role in regulating glucose and lipid metabolism through AMPK activation in skeletal muscle, with rodent data showing improved insulin sensitivity and resistance to diet-induced metabolic disruption.
Reynolds JC, et al. — Nature Communications, 2021
Rodent aging model study documenting age-related decline in endogenous MOTS-C levels and the effects of exogenous administration on physical performance, metabolic markers, and mitochondrial function in aged subjects.
Zhai D, et al. — Cell Reports, 2017
Mechanistic study demonstrating MOTS-C's activation of the AMPK-CREB signaling axis in skeletal muscle cells, with documented downstream effects on glucose uptake and lipid oxidation in both in vitro and rodent models.
Lu H, et al. — Molecular Metabolism, 2019
Examines the relationship between exercise-induced MOTS-C secretion and adaptive metabolic responses in rodent models, including mitochondrial biogenesis markers and skeletal muscle glucose utilization endpoints.
Purity Standards for Research Use
HPLC Purity
Research-grade MOTS-C should meet ≥99%+ purity by HPLC. As a 16-amino acid peptide, MOTS-C synthesis can produce related impurities including deletion sequences and oxidized methionine variants — both of which must be accounted for in the purity analysis.
Mass Spectrometry
MS identity confirmation verifies MOTS-C's molecular weight (M = 2174.5 g/mol) and ensures the correct amino acid sequence. Given the growing number of mitochondria-derived peptides being studied, MS identity verification is essential to confirm the correct compound.
Lyophilization & Storage
MOTS-C is supplied lyophilized and should be stored at -20°C.
Certificate of Analysis
Batch-specific COA documenting HPLC purity, MS identity confirmation, amino acid sequence, appearance, and storage conditions. MOTS-C is supplied in 40 mg vials — COA should reference the specific lot number and batch.
Sourcing MOTS-C in Canada
ACCUTIDE Research Supply provides MOTS-C (40 mg) tested to ≥99%+ HPLC purity with batch-specific COA and MS identity confirmation. All material is lyophilized and ships Canada-wide for laboratory research use only.
MOTS-C 40mg — Canadian Research Supply
≥99%+ HPLC · COA every batch · Ships Canada-wide · RUO
Often Researched With
Compounds frequently co-investigated alongside Mots-C in preclinical research literature.
Research Use Only Disclaimer: All information is provided for scientific research and educational purposes only. MOTS-C supplied by ACCUTIDE Research Supply is strictly for laboratory and research use (RUO). Not for human or animal consumption. All published studies referenced are preclinical rodent model or in vitro research.