SS-31 (also known as Elamipretide, MTP-131) is a functional peptide that has attracted widespread attention in the fields of biomedicine and mitochondrial research in recent years. It is not a traditional hormone-like peptide or growth-regulating peptide, but rather a functional peptide that targets mitochondria, primarily used to improve mitochondrial structure and energy metabolism efficiency. Due to its unique mechanism of action and good stability, SS-31 is widely used in scientific research, advanced biotechnology development, and as a raw material system for related functional products.
1. Basic Overview and Classification of SS-31
From a functional classification perspective, SS-31 belongs to the category of mitochondrial protective peptides/mitochondrial functional regulatory peptides.
Structurally, it belongs to the short-chain synthetic polypeptide class.
From an application perspective, it is mainly classified as a research-grade and high-end biological functional peptide raw material.
SS-31 has a short amino acid sequence and a highly specific spatial conformation, enabling it to directly locate and bind to cardiolipin on the inner mitochondrial membrane. This targeting ability gives it extremely high recognition and research value among similar polypeptides.
2. Core Advantages and Characteristics of SS-31
Potential Mitochondrial Targeting
SS-31's greatest advantage lies in its high selectivity. It can enter the inner mitochondrial membrane region without relying on membrane potential and forms a stable interaction with cardiolipin, thereby improving the structural stability of the mitochondrial membrane.
Unlike some activating or repressing peptides, SS-31 does not directly interfere with nuclear signal transduction or the hormone axis system. Instead, it acts on the source of energy metabolism, thus being a "basic function-optimizing" peptide.
It possesses the dual benefits of antioxidant activity and improved energy efficiency. SS-31 can reduce the excessive production of reactive oxygen species (ROS) in mitochondria while improving ATP synthesis efficiency, thus having high value in anti-aging, tissue protection, and tolerance studies.
It exhibits high stability and reproducibility. As a synthetic short peptide, SS-31 has good batch-to-batch stability, a well-defined structure, and is beneficial for quality control and reproducible experiments.
3. Physicochemical Performance Analysis
SS-31 is a synthetic peptide compound, usually existing in the form of lyophilized powder. Its main physicochemical properties include:
Molecular type: Linear short peptide
Molecular weight: Approximately 639 Da (may vary slightly depending on the salt form)
Solubility:
Frequently soluble in deionized water
- Soluble in weakly acidic buffer solutions
Good solubility under neutral or weakly alkaline conditions
Regarding stability, SS-31 exhibits good chemical stability under low temperature, dry, and light-protected conditions. SS-31 in solution form is recommended for low-temperature storage, avoiding repeated freeze-thaw cycles to maintain its structural integrity and biological activity.
4. Color, Appearance, and Sensory Characteristics
High-quality SS-31 raw materials typically have the following appearance characteristics:
Color:
Pure white or off-white
- No obvious discoloration or spots.
Form:
- Finely lyophilized powder
- Uniform texture, good flowability
Odor:
Almost odorless
Should not have an irritating or abnormal odor
If the raw material shows obvious yellowing, clumping, or moisture absorption, it is usually related to improper storage conditions or insufficient purity.
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