Compounds studied at three levels of the same organelle: genome signaling, membrane structure, and redox chemistry.
This category shares its compounds with longevity but frames them differently. Longevity organizes around the aging endpoint; this page organizes around the organelle itself — bioenergetics at the level of mitochondrial signaling, inner-membrane architecture, and the electron-carrier economy. Reading the two pages together gives the mechanism (here) and the aging-hallmark context (longevity). This is a mechanistic research reference, not medical or dosing guidance.
The first level is the mitochondrial genome as a signaling source. MOTS-c is a mitochondrial-derived peptide (MDP) — encoded within the mitochondrial 12S rRNA region rather than the nuclear genome — and is studied as a retrograde signal from mitochondrion to cell, with AMPK activation and adaptation to metabolic stress as the principal research themes. The MDP concept itself is the notable idea: the organelle is not only a power plant but a source of regulatory peptides.
The second level is inner-membrane architecture. SS-31 (elamipretide) concentrates in the inner mitochondrial membrane and binds cardiolipin, the signature phospholipid that organizes electron-transport-chain supercomplexes and cristae curvature. It is studied for preserving cristae integrity and electron-transport efficiency, and it is the most clinically advanced entry — investigated in primary mitochondrial myopathy and Barth syndrome — making it the bridge between mechanistic research and clinical mitochondrial medicine.
The third level is the redox cofactor economy. NAD+ is the central electron carrier for oxidative phosphorylation and the obligate substrate for sirtuins and PARPs; its availability gates both bioenergetic flux and NAD+-dependent signaling. Catalogued as a research reagent and investigational therapeutic, it represents the chemistry layer beneath the signaling and structural layers — three different entry points into the same organelle rather than three interchangeable compounds.
In this catalog, a mitochondrial peptide is a compound studied at the level of mitochondrial function — genome-derived signaling (MOTS-c), inner-membrane structure (SS-31), or the redox cofactor economy (NAD+). Entries are mechanistic reference profiles, not products or treatment recommendations.
They share compounds but not framing. This page organizes them by organelle-level mechanism — signaling, membrane structure, redox chemistry. The longevity page organizes the same peptides around the aging endpoint and hallmarks of aging. Reading both gives mechanism plus aging context.
An MDP is a peptide encoded within the mitochondrial genome rather than the nuclear genome. MOTS-c, encoded in the mitochondrial 12S rRNA region, is the catalog's example — studied as a retrograde signal from mitochondrion to cell, with AMPK activation as a principal theme.
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