MOTS-C

What is MOTS-C?

MOTS-C is a mitochondrial-derived peptide (MDP) encoded within the 12S ribosomal RNA gene of mitochondrial DNA. Research has characterized it as a regulator of metabolic homeostasis, insulin sensitivity, and exercise response. Studies have examined MOTS-C's ability to translocate to the nucleus under metabolic stress and directly regulate gene expression.

MOTS-C (Mitochondrial Open Reading Frame of the 12S rRNA-c) is supplied strictly as a reference material for in vitro and preclinical investigation. All characterization data described here is drawn from peer-reviewed literature and laboratory analysis; nothing herein constitutes a claim of clinical effect in humans.

Documented Research Areas

The following domains summarize directions explored across published studies and laboratory models. Each reflects observations reported in rodent models, in vitro systems, or the peer-reviewed record.

Mechanistic Pathway

Mechanistic steps below are hypothesized from in vitro assays and animal-model data reported in the literature. They describe biochemical interactions observed under controlled experimental conditions.

1. 1

   AMPK Pathway Activation

   MOTS-C activates AMP-activated protein kinase (AMPK), the master metabolic sensor. AMPK activation promotes fatty acid oxidation, glucose uptake via GLUT4 translocation, and mitochondrial biogenesis.

2. 2

   AICAR-Independent AMPK Signaling

   Research has documented that MOTS-C activates AMPK through a mechanism involving the folate cycle and AICAR-like metabolite accumulation, distinct from canonical AMPK activators.

3. 3

   Nuclear Translocation & Gene Regulation

   Under metabolic stress conditions, studies have shown MOTS-C can translocate from mitochondria to the nucleus, where it directly binds to ARE (antioxidant response element) gene promoters.

4. 4

   Insulin Signaling Enhancement

   Research has documented MOTS-C-mediated improvements in insulin receptor substrate (IRS) phosphorylation and downstream PI3K/Akt signaling in skeletal muscle cells from insulin-resistant rodent models.

Molecular Specifications

Selected Literature

The following peer-reviewed references informed the research summaries on this page. Citations are provided for scientific context only.

1. Lee C, et al. (2015). The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance. Cell Metabolism, 21(3), 443–454.
2. Kim SJ, et al. (2018). MOTS-c: a mitochondrial encoded regulator of the nucleus. Biogerontology, 19(6), 547–555.
3. Reynolds JC, et al. (2021). MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis. Nature Communications, 12(1), 470.
4. Zempo H, et al. (2021). A sex-specific mitohormetic response to exercise training. FASEB Journal, 35(2), e21269.
5. Lu H, et al. (2019). MOTS-c peptide regulates adipose homeostasis to prevent ovariectomy-induced metabolic dysfunction. Journal of Molecular Medicine, 97(4), 473–485.