MOTS-c vs SS-31: Mitochondrial Peptide Comparison

MOTS-c, a naturally occurring mitochondrial derived peptide, and SS-31, a synthetic mitochondrial-targeting compound, are the leading subjects in preclinical studies for mitochondrial dysfunction and age related diseases.

To understand the pros and cons of MOTS-c vs SS-31, we need to look at their molecular composition, research applications and mechanisms of action in the lab.

What are MOTS-c and SS-31 Peptides

MOTS-c is a 16 amino acid mitochondrial derived peptide encoded by the mitochondrial 12S rRNA gene. Unlike traditional nuclear encoded proteins, this peptide mots c comes from the mitochondrial genome, challenging the conventional understanding of mitochondria’s regulatory capabilities.

SS-31, also known as Elamipretide, is a synthetic approach to mitochondrial protection. This tetrapeptide was designed to target cardiolipin, a unique phospholipid in the inner mitochondrial membrane.

The discovery timeline is important to understand the history of these compounds. SS-31 was developed from targeted drug design post 2000, while MOTS-c was identified more recently as genomic tools became available to study mitochondrial derived peptides. Both have gone through extensive preclinical studies, with SS-31 further into clinical trials.

The differences in their origin reflect different research philosophies: MOTS-c uses the body’s natural mitochondrial signaling, while SS-31 uses synthetic chemistry to create highly specific mitochondrial targeting. This fundamental difference impacts their mechanisms, applications and research directions.

Molecular Composition and Chemical Data

The molecular structure of MOTS-c vs SS-31 shows significant differences that impact their biological activities. MOTS-c is a 16 amino acid peptide with the sequence MRWQEMGYIFYPRKLR, encoded directly from the mitochondrial 12S rRNA gene region.

Research shows MOTS-c has a molecular weight of approximately 1,915 daltons and is stable under physiological conditions.

SS-31 is a more compact tetrapeptide with the sequence D-Arg-dimethylTyr-Lys-Phe-NH2. With a molecular weight of approximately 640 daltons, this compound was designed for optimal cardiolipin binding in the mitochondrial membrane structure. The synthetic design incorporates modified amino acids for enhanced stability and membrane permeability.

Bioavailability studies show different administration characteristics for each compound. MOTS-c shows rapid distribution to skeletal muscle and other metabolically active tissues, while SS-31 has unique membrane-penetrating properties to target mitochondria directly. These differences impact experimental protocols and research applications in the lab.

Research Areas for MOTS-c vs SS-31

The compound’s ability to maintain membrane integrity makes it useful for studying damage prevention.

Both have promise for age related diseases but through different mechanisms.

These findings suggest complementary applications in sports science.

Mechanism of Action Comparison

SS-31 works through direct binding to cardiolipin in the mitochondrial membrane. This interaction stabilizes the inner mitochondrial membrane structure and optimizes electron transport efficiency.

Unlike MOTS-c’s regulatory approach, SS-31 is a direct structural stabilizer of mitochondrial architecture. Cellular target differences show complementary mechanisms: MOTS-c affects skeletal muscle and nuclear signaling pathways while SS-31 acts on mitochondrial membranes across various tissue types.

Studies looking at plasma mots c levels show inverse relationship with obesity markers and positive association with exercise capacity. The peptide’s effects on aging cell populations suggest applications in cellular senescence research.

The compound’s ability to maintain electron transport efficiency makes it useful for studying mitochondrial dysfunction in various disease models.

Synergistic potential emerges when considering MOTS-c vs SS-31 in combination protocols.

MOTS-c research shows minimal adverse effects in long term administration studies while SS-31 shows good safety margins in clinical trial settings. Both peptides work with natural cellular processes rather than disrupting normal physiology.

Future Research Directions for Both Peptides

Ongoing research into MOTS-c vs SS-31 will continue to expand our understanding of mitochondrial targeted interventions.

This will expand research applications and improve experimental reproducibility.

Long term safety studies are a priority for both compounds as research moves towards clinical applications. Ongoing studies are looking at chronic administration effects, resistance development and optimal treatment duration protocols. These will inform future research guidelines and safety parameters.

Purchase MOTS-c and SS-31 at Loti Labs

Loti Labs offers research grade MOTS-c with verified purity standards above 98% as determined by HPLC analysis. Each batch is tested by third party to ensure molecular integrity and absence of contaminants that can affect experimental outcomes.

SS-31 peptide options at Loti Labs are pharmaceutical grade with detailed COA documenting purity, molecular weight confirmation and stability data. Available in multiple quantities to fit small scale research projects or larger experimental protocols.

Pricing reflects the complexity of peptide synthesis and purification process. MOTS-c pricing accounts for the sophisticated production methods to maintain natural peptide integrity, while SS-31 pricing reflects synthetic optimization and quality control. Bulk purchase options available for extended research protocols or multi-experiment studies.

Quality assurance protocols ensure both peptides meet research standards. Storage requirements include specific temperature controls and moisture protection to maintain peptide stability throughout the research period. Handling protocols are provided with each shipment to optimize experimental results.

Shipping is designed to accommodate the sensitive nature of peptide compounds with temperature controlled delivery options and expedited processing for time sensitive research applications. Documentation is provided with each shipment detailing storage recommendations and handling procedures to maintain compound integrity from delivery to use.

Frequently Asked Questions

What are the main differences between MOTS-c and SS-31?

What research areas are MOTS-c and SS-31 primarily used for?

Both peptides are for research use only.

Can MOTS-c and SS-31 be combined in research protocols?

What is the molecular weight of MOTS-c compared to SS-31?

MOTS-c has a molecular weight of approximately 1,915 daltons as a 16-amino acid peptide with the sequence MRWQEMGYIFYPRKLR. SS-31 has a molecular weight of approximately 640 daltons as a compact tetrapeptide (D-Arg-dimethylTyr-Lys-Phe-NH2).

Summary

The comparison of MOTS-c vs SS-31 shows two different but potentially complementary approaches to mitochondrial research applications.

This makes them useful for different research questions and experimental designs.

As research advances our knowledge of these compounds, their applications in research will expand, providing new tools to understand cellular energy metabolism and age related changes.

References

1. Lee, C., et al. (2015).
2. Reynolds, J.C., et al. (2021).
3. Szeto, H.H. (2014). Birk, A.V., et al. (2013).
4. Chatfield, K.C., et al. (2019).
5. Kim, K.H., et al. (2018). “Mitochondrial peptides in aging and age-related diseases.” GeroScience 40(2): 113-119.
6. D’Angelo, S., et al. (2020).
7. Ming, W., et al. (2021).
8. Dabravolski, S.A., et al. (2022).