Overview
Mitochondrial research peptides are studied for their relationship to the organelle rather than to a single receptor. Two structurally unrelated classes appear in this literature: mitochondrial-derived peptides, which are encoded within mitochondrial DNA and translated from mitochondrial reading frames; and mitochondria-targeted synthetic peptides, which are designed to accumulate at the inner mitochondrial membrane. Solira supplies compounds from both classes. All are supplied for in-vitro laboratory research only and are not approved for human use.
Mitochondrial-Derived Peptides
Mitochondrial-derived peptides (MDPs) are short peptides encoded by open reading frames within mitochondrial DNA rather than by the nuclear genome — a distinction that makes them a separate class from every nuclear-encoded peptide in the catalog. They are studied as signalling molecules produced by the organelle itself, and the research question is typically retrograde signalling: how the mitochondrion communicates state to the rest of the cell.
MOTS-c is a 16-amino-acid mitochondrial-derived peptide encoded by 12S rRNA, characterized in preclinical research on mitochondrial-function and metabolic-pathway mechanisms. 2174.60 g/mol.
Mitochondria-Targeted Peptides
The second class is synthetic and works by localisation rather than by genomic origin. These sequences carry an alternating aromatic-cationic motif that concentrates them at the inner mitochondrial membrane independently of membrane potential, which is what distinguishes them from cationic peptides that accumulate only in polarised mitochondria.
SS-31 (Elamipretide) is a synthetic mitochondria-targeted tetrapeptide that binds cardiolipin in the inner mitochondrial membrane, investigated in preclinical research on mitochondrial bioenergetics pathways. 639.79 g/mol — the smallest compound in this category.
The full category listing is at the Longevity & Mitochondrial research catalog.
Research Applications
Investigations of this compound class use methods that read the organelle directly rather than a receptor-binding endpoint: extracellular flux analysis measuring oxygen consumption rate and extracellular acidification rate in cultured cells; mitochondrial membrane potential measurement using potentiometric dyes; cardiolipin-binding assays using isolated inner-membrane preparations or liposome models for the mitochondria-targeted class; and expression work on mitochondrial reading frames for the MDP class, where the research question is whether a given open reading frame is translated under a given condition. Because the two classes reach the organelle by unrelated routes — genomic origin versus engineered localisation — they are frequently studied as contrasting tools rather than as substitutes.
Storage Characteristics
Lyophilized compounds in this category are stable for 24 months or longer at −20°C in sealed vials, protected from light and moisture. The tetrapeptide SS-31 is considerably more robust in solution than the 16- and 37-residue sequences, which are more sensitive to freeze-thaw cycles once reconstituted. Reconstituted aqueous solutions should be aliquoted before freezing. See the peptide storage guide for full reconstitution and handling parameters.
Related Research
- Compound Research Database — full Solira catalog with molecular weights and CAS numbers
- How Solira Tests Every Lot — HPLC and mass spectrometry verification applied to every research peptide lot, including this category
- What Is NAD+? — pyridine nucleotide coenzyme reference; catalogued under Cellular Vitality & Cofactors, and studied in overlapping electron-transfer literature
- Peptide Storage Guide — storage and reconstitution practices for lyophilized research peptides
- What Are Research Peptides? — neutral reference on synthesis, characterization and research-supply framing
