MOTS-c vs NAD+
MOTS-c (Mitochondrial-derived peptide) and NAD+ (Cellular coenzyme (dinucleotide)) are documented as co-studied in the PeptiDex library. This page puts the two entries side by side on class, molecular weight, half-life, origin, mechanism and studied research areas — every value taken from the entry it belongs to.
Why these two are co-studied
Cross-referenced for research context — not a usage or combination recommendation.
At a glance
| Attribute | MOTS-c | NAD+ |
|---|---|---|
| Compound class | Mitochondrial-derived peptide | Cellular coenzyme (dinucleotide) |
| Research category | Metabolic & Mitochondrial | Longevity & Cellular |
| Length (amino acids) | 16 amino acids | Not documented |
| Molecular weight | ~2174 g/mol | 663.43 g/mol (free acid) |
| Half-life | Not documented | Not documented |
| Origin | MOTS-c (Mitochondrial ORF of the 12S rRNA type-c) is a 16-amino-acid mitochondrial-derived peptide encoded within the MT-RNR1 (12S rRNA) region of mitochondrial DNA. It was described in 2015 and is one of a small family of mitochondrial-derived peptides. | Nicotinamide adenine dinucleotide (NAD+) is a naturally occurring coenzyme present in all living cells, first described in the early 20th century in the context of fermentation and cellular respiration. It is not a peptide but a dinucleotide composed of a nicotinamide moiety and an adenine moiety joined through ribose and phosphate groups. |
“Not documented” means the PeptiDex entry records no value for that field. Nothing on this page is estimated, and no figure is carried over from one compound to the other.
How MOTS-c works
MOTS-c is reported to regulate metabolic homeostasis, in part via activation of the AMPK pathway and modulation of the folate-methionine cycle and de novo purine biosynthesis. It has been described to translocate to the nucleus under metabolic stress and influence stress-response gene expression. Preclinical work links it to improved insulin sensitivity and glucose uptake in skeletal muscle; it is also described as exercise-responsive.
How NAD+ works
NAD+ functions as a central redox cofactor, cycling between its oxidized (NAD+) and reduced (NADH) forms to shuttle electrons in glycolysis, the citric acid cycle, and oxidative phosphorylation. Beyond redox chemistry, NAD+ is a required substrate for enzymes that consume it, including sirtuins (NAD+-dependent deacylases), poly(ADP-ribose) polymerases (PARPs) involved in DNA repair, and CD38. Cellular NAD+ levels have been reported to decline with age in various tissues, which is a focus of aging research. It is synthesized de novo from tryptophan and through salvage pathways from precursors such as nicotinamide, nicotinic acid, and nicotinamide riboside.
Mechanistic descriptions reflect published research-literature understanding and are quoted from each compound's own entry. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
Where each one appears in the literature
The research contexts each entry documents. Listing a research area is not a claim of efficacy or a therapeutic indication, and the two lists are not scored against each other.
MOTS-c
NAD+
What sets each apart
MOTS-c
Unlike the GH-derived fragments here, MOTS-c is endogenously encoded in the mitochondrial genome and acts as a broad metabolic regulator rather than a targeted lipolytic fragment.
NAD+
Unlike the peptides in this category, NAD+ is a small-molecule coenzyme central to redox metabolism rather than a signaling peptide, and it is studied primarily via precursor supplementation.
Frequently asked questions
What is MOTS-c and where does it come from?
MOTS-c (Mitochondrial Open-reading-frame of the Twelve-S rRNA type-c) is a 16-amino-acid mitochondrial-derived peptide (MDP) encoded within the 12S rRNA region of mitochondrial DNA, rather than by the nuclear genome. First described in 2015, it is studied as a regulator of metabolic homeostasis. Its sequence and MDP origin make it structurally distinct from most catalog peptides.
What is MOTS-c studied for?
MOTS-c is studied in models of metabolic homeostasis, insulin sensitivity, exercise capacity, and aging. Research reported that MOTS-c levels rise with exercise and that exogenous MOTS-c improved glucose tolerance, insulin sensitivity, and running endurance in aged mice. It is thought to act partly via AMPK-linked metabolic signaling.
How is MOTS-c thought to work mechanistically?
MOTS-c is reported to translocate to the nucleus under metabolic stress and influence adaptive gene-expression programs, and it engages the AMPK pathway and folate/one-carbon metabolism to promote glucose uptake and fatty-acid oxidation. This positions it as a signaling peptide linking mitochondrial state to whole-body metabolism in preclinical models.
What is NAD+ and what is it studied for?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme central to cellular energy metabolism, redox reactions, and as a substrate for sirtuins and PARP enzymes involved in DNA repair. It is studied in models of aging, mitochondrial function, metabolic decline, and neuroprotection, where tissue NAD+ levels fall with age. It is a naturally occurring coenzyme, not a peptide.
Is NAD+ a peptide?
No. NAD+ is a dinucleotide coenzyme composed of two nucleotides (one bearing adenine, the other nicotinamide) joined through phosphate groups, not a chain of amino acids. It is grouped in longevity research catalogs alongside peptides because of its role in aging and mitochondrial studies, but it is a distinct chemical class.
How does NAD+ differ from precursors like NMN and NR?
NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are biosynthetic precursors that cells convert into NAD+, whereas NAD+ is the finished coenzyme. Precursors are commonly studied as oral routes to raise intracellular NAD+, while NAD+ itself is studied via IV or subcutaneous routes in research settings. Direct cellular uptake of intact NAD+ is a subject of ongoing research.
Answers are the ones published on each compound's own PeptiDex entry. They are educational summaries of research-literature context and are not medical advice.