Overview

SS-31 (also known as Elamipretide and MTP-131) is a synthetic mitochondria-targeting tetrapeptide composed of four amino acids, including the modified residue 2′,6′-dimethyltyrosine. Its alternating cationic and aromatic structure allows the peptide to concentrate within the inner mitochondrial membrane, distinguishing it from peptides that act primarily at cell-surface receptors.

SS-31 has been studied for its selective association with cardiolipin, a phospholipid concentrated in the inner mitochondrial membrane that is closely involved in maintaining cristae architecture and the organization of the electron transport chain. Because of this interaction, researchers have examined the peptide as a tool for investigating mitochondrial bioenergetics and membrane stability.

Due to its mitochondrial localization and interaction with cardiolipin, SS-31 has become a frequently studied compound in laboratories examining cellular energy metabolism, oxidative stress signaling, and mitochondrial function.

Research Background

Scientific investigations have explored SS-31 in experimental models examining mitochondrial membrane organization, electron transport efficiency, and reactive oxygen species regulation.

Laboratory studies suggest that SS-31 may bind cardiolipin through electrostatic interactions, an association that researchers have proposed could help stabilize the structure of mitochondrial cristae. Because cardiolipin supports the organization of respiratory complexes within the inner mitochondrial membrane, experimental models have examined whether this interaction may influence electron transport chain efficiency.

Additional research has investigated SS-31 in relation to reactive oxygen species (ROS) and oxidative stress pathways. Experimental findings have suggested that stabilization of mitochondrial membranes may be associated with reduced production of reactive oxygen species and changes in adenosine triphosphate (ATP) synthesis observed within cellular research models.

Proteomic research has also examined the mitochondrial protein interaction landscape of SS-31, where investigators explored the peptide’s association with membrane-embedded proteins involved in oxidative phosphorylation and metabolic regulation.

SS-31 has been studied across a range of experimental models, including those examining cardiac ischemia-reperfusion, renal injury, and age-related mitochondrial decline, where researchers monitored biochemical markers of mitochondrial function during controlled laboratory protocols. Because of its mitochondrial targeting and interaction with cardiolipin, SS-31 continues to be studied as a model compound in research examining mitochondrial bioenergetics, oxidative stress, and cellular energy metabolism.

Common Research Focus Areas

• Mitochondrial bioenergetics and membrane stability studies

• Cardiolipin interaction and inner mitochondrial membrane research

• Electron transport chain and oxidative phosphorylation investigations

• Reactive oxygen species and oxidative stress pathway analysis

• Cellular energy metabolism and mitochondrial function research