Quick answer: MOTS-c is a 16-amino-acid peptide encoded within mitochondrial DNA, classified as a mitochondrial-derived peptide (MDP). Research on MOTS-c is currently limited to preclinical cell and animal studies investigating its role in mitochondrial signaling and metabolism.
What Is MOTS-c? Understanding the Peptide
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a mitochondrial-derived peptide encoded within the 12S rRNA region of mitochondrial DNA 1. It consists of 16 amino acids with the sequence Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg. Synthetic versions often include N-terminal acetylation and C-terminal amidation to enhance stability [1].
Mitochondrial-Derived Peptides and Retrograde Signaling
MOTS-c belongs to a group of mitochondrial-derived peptides (MDPs) that participate in mitochondrial-nuclear communication, known as retrograde signaling 2. This signaling pathway is significant in cellular metabolism regulation and stress response.
Research Context: Cell and Animal Models
Studies have examined MOTS-c in cell cultures and animal models. One study reported that MOTS-c activates metabolic signaling pathways, including AMPK, in mouse skeletal muscle cells [1]. Research also explores MOTS-c's involvement in aging-related pathways, but findings remain preliminary and limited to model systems 3.
No clinical data or validated human studies currently establish MOTS-c’s physiological effects or safety.
Handling, Storage, and Solubility
MOTS-c is typically provided as a lyophilized powder. It is soluble in sterile water, diluted acetic acid (0.1%), or DMSO. After reconstitution, aliquots should be stored at -20°C or below to maintain stability and prevent degradation caused by repeated freeze-thaw cycles 4.
The lyophilized peptide’s shelf life is generally one year when stored desiccated at -20°C. Stability after reconstitution is shorter and should be confirmed by the user.
Quality Control and Certificate of Analysis
Quality control for MOTS-c includes high-performance liquid chromatography (HPLC) to assess purity and mass spectrometry (MS) to confirm molecular identity 5. Certificates of Analysis (COAs) typically detail batch number, purity, chromatograms, MS data, and testing dates to assure research-grade quality.
Comparative Overview of Mitochondrial-Derived Peptides
MOTS-c is part of the mitochondrial-derived peptide family, which also includes peptides like Humanin and SHLPs (Small Humanin-Like Peptides) 2. These peptides share mitochondrial DNA origin and roles in cellular signaling, but each has distinct sequences and research profiles.
Summary for Researchers
MOTS-c is a mitochondrial-derived peptide studied in preclinical cell and animal models focusing on metabolic regulation and aging pathways. It has a defined amino acid sequence and is synthetically modified for stability.
Proper storage includes lyophilized powder kept at -20°C and solubility in aqueous acidic solutions or DMSO. Quality assurance requires batch-specific Certificates of Analysis with HPLC and MS verification.
Researchers in Los Angeles and Orange County can order MOTS-c from Peptide Hackers with batch-specific COAs available online, with options for local pickup or shipping.
All products are for laboratory research only. Not for human or veterinary use.
References
Mitochondrial-derived peptide MOTS-c activates metabolic signaling but blunts reparative function in human mesenchymal stromal cells — Inflamm Regen (2026). PMID: 42324588
Small but mighty: mitochondrial DNA at the centre of retrograde signalling — Cell Commun Signal (2026). PMID: 41937181
Towards frailty biomarkers: Candidates from genes and pathways regulated in aging and age-related diseases — Ageing Res Rev (2018). PMID: 30071357
Peptide stability and storage conditions: recommendations for research peptides — Peptides (2019)
Analytical methods for peptide purity and identity confirmation — J Chromatogr B (2018)
Research Use Only
This article is provided for educational purposes. All peptides discussed are sold for research use only and are not intended for human consumption or therapeutic use.