Purchasing lab-tested MOTS-c requires verifiable third-party analytical documentation to ensure strict sequence identity, high purity, and minimal endotoxin burden. For researchers evaluating mitochondrial-derived peptides, understanding analytical validation standards like reverse-phase HPLC and mass spectrometry is critical for reproducible preclinical investigation.
Purchasing lab-tested MOTS-c requires verifiable third-party analytical documentation to ensure strict sequence identity, high purity, and minimal endotoxin burden. For researchers evaluating mitochondrial-derived peptides, understanding analytical validation standards like reverse-phase HPLC and mass spectrometry is critical for reproducible preclinical investigation.
In contemporary bioenergetic and metabolic research, acquiring a truly lab-tested MOTS-c compound means obtaining a synthetic peptide verified through multi-tier analytical chemistry protocols. Because MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) plays a specialized role in cellular signaling, experimental validity depends heavily on compound purity, mass confirmation, and freedom from trace bacterial contamination.
When evaluating a lab-tested MOTS-c product, investigators must look beyond simple self-reported purity claims. True laboratory testing entails lot-specific analysis conducted by an independent ISO 17025 accredited laboratory using Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to establish purity, Matrix-Assisted Laser Desorption/Ionization or Electrospray Ionization Mass Spectrometry (MALDI-TOF / ESI-MS) to confirm molecular mass, and Chromogenic LAL Assays to quantify endotoxin levels. Accessing verified compounds via PX1 Research's catalog of pure peptides ensures laboratory models operate on controlled, reliable inputs.
MOTS-c is a 16-amino-acid peptide encoded within the mitochondrial 12S ribosomal RNA (rRNA) gene, representing a distinct class of biologically active signals known as mitochondrial-derived peptides. Unlike classical nuclear-encoded signaling molecules, MOTS-c originates directly from the mitochondrial genome (mtDNA), reflecting an evolutionary adaptation for retrograde organelle-to-nucleus communication.
The primary amino acid sequence of MOTS-c (Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg) yields a molecular weight of approximately 2174.6 Da. Because of its hydrophobic residues and susceptibility to oxidation at methionine positions, synthesizing MOTS-c with exact stereochemical accuracy presents significant chemical challenges. Laboratory verification via high-resolution liquid chromatography-mass spectrometry (LC-MS) is necessary to ensure the peptide sequence lacks truncated fragments, deletion sequences, or oxidized side chains prior to use in cell culture or animal assays.
Preclinical studies suggest that MOTS-c operates as a key metabolic regulator during cellular stress. Research models indicate that under conditions of nutrient deprivation or oxidative stress, MOTS-c translocates from the mitochondria to the nucleus, where it binds to specific promoter regions alongside transcription factors such as NRF2 (Nuclear Factor Erythroid 2-Related Factor 2) to modulate stress response genes.
In vitro data demonstrate that MOTS-c targets the folate cycle and purine biosynthesis pathways. By inhibiting the enzyme 5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase (AICART), MOTS-c leads to an accumulation of AICAR, an endogenous activator of 5' AMP-activated protein kinase (AMPK). Through AMPK activation, MOTS-c enhances cellular glucose uptake, optimizes fatty acid oxidation, and supports overall mitochondrial biogenesis in cultured skeletal muscle cells and hepatocytes.
Metabolic health models frequently utilize MOTS-c to explore pathways involved in insulin sensitivity and nutrient partitioning. Rodent models subjected to high-fat diet (HFD) regimens have shown that administration of MOTS-c aids in maintaining systemic insulin sensitivity, suppressing diet-induced weight gain, and preventing hepatic steatosis.
Mechanistic investigations reveal that MOTS-c promotes glucose clearance independent of classical insulin receptor pathways in certain tissue types. By enhancing GLUT4 translocation to the plasma membrane in skeletal muscle models, MOTS-c acts as an energy sensor that rebalances cellular energy state when ATP production is compromised. Researchers examining metabolic syndrome pathways rely on analytical COA database resources to ensure their experimental peptides provide consistent bioactivity without confounding artifacts.
MOTS-c has drawn substantial interest in exercise physiology research, frequently characterized in preclinical literature as an 'exercise mimetic' compound. In animal models, expression levels of MOTS-c naturally surge in response to acute physical exertion, indicating its function as an endogenous exercise-induced signaling hormone.
Studies in rodent models indicate that treatment with MOTS-c enhances physical performance, running capacity, and heat tolerance in both young and aged mice. These physiological adaptations stem from improved oxidative phosphorylation capacity in skeletal muscle tissue and upregulated expression of carnitine palmitoyltransferase 1A (CPT1A), which facilitates fatty acid transport into the mitochondria. Investigators studying age-related decline utilize bulk research compounds to evaluate long-term metabolic adaptations in controlled preclinical cohorts.
Within the domain of mitochondrial signaling and bioenergetics research, MOTS-c is frequently evaluated alongside other prominent mitochondrial-targeted molecules, including Humanin peptide research compounds and SS-31 (Elamipretide). While all three target organellar resilience and bioenergetic efficiency, their primary mechanisms of action differ substantially.
MOTS-c functions primarily as a nuclear-translocating transcriptional regulator that activates AMPK via folate pathway modulation, focusing heavily on systemic metabolic regulation, glucose homeostasis, and physical endurance adaptations. In contrast, Humanin (a 24-amino-acid mitochondrial-derived peptide) functions predominantly as a cytoprotective signal that binds to extracellular receptors (such as the FPRL1 complex) or intracellular proteins (Bax) to suppress apoptosis and neuroinflammatory cascades. Meanwhile, SS-31 (Elamipretide) is a synthetic tetrapeptide that selectively targets cardiolipin within the inner mitochondrial membrane, physically stabilizing membrane curvature and reducing electron leakage without directly translocating to the nucleus. Understanding these distinct pathways allows researchers to select the precise research peptide for their experimental protocols.
The scientific validity of peptide research hinges entirely on compound purity and chemical integrity. Unverified peptides frequently contain unreacted amino acid fragments, residual protecting groups (such as Fmoc or t-Boc), organic solvents (TFA, DMF), or heavy metal catalysts that alter cellular responses and corrupt baseline data.
A rigorous analytical testing standard ensures that every lot of MOTS-c meets strict thresholds: high-performance liquid chromatography purity exceeding 98%, exact mass matching via mass spectrometry, and low endotoxin levels verified through quantitative assays. PX1 Research adheres to these rigorous quality standards across its entire high-purity research peptides inventory, ensuring consistent performance in high-throughput assays.
A Certificate of Analysis (COA) provides documented proof of a compound's identity and purity. When reviewing a COA for lab-tested MOTS-c, researchers should analyze three critical laboratory tests:
1. Reverse-Phase HPLC (RP-HPLC): Evaluates chemical purity by separating the primary peptide peak from impurities. The primary peak area should account for ≥98% of the total integrated area at a 220 nm UV absorption wavelength. 2. Mass Spectrometry (ESI-MS or MALDI-TOF): Confirms molecular identity by measuring the exact mass-to-charge ratio (m/z). For MOTS-c, the observed molecular ion peak must align precisely with the theoretical monoisotopic mass of 2174.6 Da. 3. Endotoxin Testing (LAL Assay): Measures lipopolysaccharide (LPS) contamination from bacterial expression or processing equipment. For sensitive cell cultures and in vivo rodent assays, endotoxin levels must remain under stringent thresholds, as detailed in our guide on endotoxin testing standards.
To preserve the structural integrity of lab-tested MOTS-c during laboratory experiments, strict handling protocols must be observed. MOTS-c is typically supplied as a lyophilized (freeze-dried) powder under vacuum or inert argon gas to prevent moisture uptake and oxidative degradation.
For solubilization, researchers should follow established peptide reconstitution guidelines. Reconstitute the lyophilized powder using sterile Bacteriostatic Water or sterile 0.9% Sodium Chloride injection solution. If solubility issues arise due to the peptide's hydrophobic residues, brief gentle vortexing or addition of a minute concentration of sterile acetic acid (0.1% v/v) may assist dissolution. Lyophilized MOTS-c should be stored at -20°C or -80°C for long-term stability. Once reconstituted, liquid aliquots should be used promptly or frozen at -80°C to avoid repeated freeze-thaw cycles that induce peptide aggregation.
Selecting a supplier for lab-tested MOTS-c requires rigorous vendor vetting. Academic institutions, biotechnology firms, and contract research organizations (CROs) require absolute transparency regarding manufacturing conditions, batch traceability, and analytical verification.
PX1 Research manufactures its compounds in state-of-the-art US-based facilities under strict quality management systems. Each production batch undergoes independent third-party testing in ISO 17025 accredited testing laboratories, ensuring lot-to-lot consistency. Orders ship directly from domestic logistics centers in California and Arizona, providing fast domestic transit times and minimizing peptide exposure to uncontrolled ambient temperatures.
What is MOTS-c and how is it defined in research?
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a 16-amino-acid peptide encoded within the mitochondrial genome. It is studied in preclinical research for its role in cellular bioenergetics, metabolic homeostasis, and retrograde signaling between mitochondria and the nucleus.
What analytical tests confirm that MOTS-c is lab tested?
A fully lab-tested MOTS-c lot must be validated via Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) for purity (≥98%), Mass Spectrometry (ESI-MS or MALDI-TOF) for molecular mass confirmation, and Limulus Amebocyte Lysate (LAL) chromogenic assays for endotoxin quantification.
What are the primary research targets evaluated with MOTS-c?
Preclinical literature investigates MOTS-c for its interactions with AMPK activation pathways, folate metabolism, glucose transporter GLUT4 translocation, fatty acid oxidation, and physical endurance adaptation in animal models.
How does MOTS-c compare to Humanin in mitochondrial research?
Both are mitochondrial-derived peptides, but MOTS-c acts primarily as a metabolic regulator and transcriptional modulator via AMPK and folate pathways. Humanin functions largely as a cytoprotective, anti-apoptotic signal that interacts with cell survival pathways and Bax protein signaling.
How should lyophilized MOTS-c be stored in the laboratory?
Lyophilized MOTS-c powder should be stored desiccated at -20°C or -80°C to maintain long-term chemical stability. Reconstituted solution aliquots should be frozen at -80°C to prevent freeze-thaw degradation.
What solvent is recommended for reconstituting MOTS-c for laboratory assays?
MOTS-c is typically reconstituted using sterile Bacteriostatic Water or sterile 0.9% Sodium Chloride. Gentle agitation or dilute organic acids (e.g., 0.1% acetic acid) may be utilized if complete dissolution requires assistance.
Why are endotoxin limits important for MOTS-c research peptides?
Endotoxins (lipopolysaccharides) induce non-specific inflammatory responses in cell cultures and animal models, creating confounding variables that mask the true physiological mechanisms of MOTS-c.
Where is PX1 Research MOTS-c manufactured and tested?
PX1 Research peptides are manufactured in USA-based facilities operating under GMP guidelines and tested by independent ISO 17025 accredited laboratories to confirm purity, identity, and safety parameters.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.