MOTS-c vs NAD+
Two molecules from the longevity-research cluster compared by class, molecular profile, and the metabolic and DNA-repair pathways each is studied for in laboratory models.
Overview
MOTS-c and NAD+ are frequently mentioned in the same longevity-research conversations, but they are fundamentally different kinds of molecule that act at different points in cellular metabolism. MOTS-c is a mitochondrial-derived peptide, a 16-residue chain encoded within the 12S rRNA region of mitochondrial DNA and studied as a signalling "mitokine". NAD+ (nicotinamide adenine dinucleotide) is a small-molecule coenzyme present in every living cell that functions both as a redox electron carrier and as a consumable substrate for several enzyme families.
The shared thread is metabolic and mitochondrial biology. MOTS-c is studied chiefly around AMP-activated protein kinase (AMPK), the cell's metabolic-stress sensor, while NAD+ is studied around the sirtuin deacylases and the poly(ADP-ribose) polymerase (PARP) DNA-repair enzymes that depend on it. Because both intersect mitochondrial function and have been examined in ageing-related models, they are natural comparison points in the longevity literature, even though one is a gene-encoded peptide and the other a metabolic cofactor.
At a Glance
| MOTS-c | NAD+ | |
|---|---|---|
| Molecular class | Mitochondrial-derived peptide (16 residues) | Dinucleotide coenzyme / cofactor |
| Origin | Encoded in mitochondrial 12S rRNA gene | Synthesised from vitamin B3 precursors / salvage pathway |
| Molecular formula | C101H152N28O22S2 | C21H27N7O14P2 |
| Molecular weight | ~2174.6 g/mol | ~663.4 g/mol |
| CAS number | 1627580-64-6 | 53-84-9 |
| Primary pathway studied | Folate–AICAR–AMPK metabolic signalling | Sirtuin & PARP-dependent signalling / redox |
| Common research focus | Metabolic homeostasis, insulin-sensitivity, exercise models | Ageing, DNA repair, mitochondrial-function models |
Molecular Profiles
MOTS-c
NAD+
MOTS-c Mechanism in Research Models
Findings below are drawn from published in-vitro and animal-model research:
- Folate–AICAR–AMPK axis: MOTS-c has been reported to interfere with the folate cycle and its tethered de novo purine biosynthesis, raising endogenous AICAR and activating AMP-activated protein kinase (AMPK), the cellular metabolic-stress sensor (Lee et al., 2015).
- Stress-induced nuclear translocation: Under glucose restriction and oxidative stress, MOTS-c has been reported to translocate to the nucleus in an AMPK-dependent manner and modulate stress-responsive genes, including interaction with the NRF2 antioxidant-response programme (Kim et al., 2018).
- Metabolic-homeostasis endpoints: In rodent studies, MOTS-c administration has been reported to influence glucose handling and to attenuate diet-induced and age-dependent insulin resistance, framed as a metabolic-regulation phenotype (Lee et al., 2015).
- Expression and ageing context: Review-level literature describes MOTS-c expression as responsive to exercise and metabolic stress and as declining with age, which is why it is examined in ageing-related metabolic models (Kumagai et al., 2023).
NAD+ Mechanism in Research Models
Findings below are drawn from published in-vitro and animal-model research:
- Redox electron carrier: NAD+ and its reduced form NADH form the principal redox couple of central metabolism, shuttling electrons through glycolysis, the TCA cycle, and oxidative phosphorylation, the long-established biochemical role of the coenzyme.
- Sirtuin co-substrate:The sirtuin family (SIRT1–7) consumes NAD+ to remove acyl groups from target proteins, splitting NAD+ into nicotinamide and ADP-ribose; sirtuin activity is therefore reported to track cellular NAD+ availability (Verdin, 2015).
- PARP-dependent DNA repair: Poly(ADP-ribose) polymerases such as PARP1 sense DNA strand breaks and consume NAD+ to build poly(ADP-ribose) chains that recruit repair machinery, a documented competing demand on the cellular NAD+ pool (Verdin, 2015).
- NAD+–sirtuin–DNA-repair crosstalk: In DNA-repair-deficient models, PARP1 hyperactivation has been reported to deplete NAD+ and reduce SIRT1 activity, with NAD+ repletion restoring SIRT1 signalling and mitochondrial function in those models (Fang et al., 2014).
Key Mechanistic Differences
- Peptide signal vs metabolic cofactor: MOTS-c is a gene-encoded signalling peptide studied for what it switches on (AMPK and downstream stress programmes); NAD+ is a consumable cofactor studied for the reactions and enzymes that depend on its availability (sirtuins, PARPs, redox).
- AMPK vs sirtuin/PARP emphasis:MOTS-c research centres on the folate–AICAR–AMPK axis and metabolic homeostasis (Lee 2015; Kim 2018), whereas NAD+ research centres on sirtuin deacylation and PARP-driven DNA repair (Verdin 2015; Fang 2014).
- Different scale and chemistry: MOTS-c is a ~2175 g/mol 16-residue peptide; NAD+ is a ~663 g/mol dinucleotide. They are not interchangeable and are not chemical analogues of one another.
- Shared mitochondrial and ageing context: Both intersect mitochondrial biology and both have been examined in ageing-related models, which is the main reason the two appear together in longevity-research discussions despite their distinct mechanisms.
Key Published Research
The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance
Lee C, et al. Cell Metabolism. 2015; 21(3):443-454 (PMID 25738459)
The foundational MOTS-c paper, reporting that the mitochondrially encoded peptide raises endogenous AICAR, activates AMPK, and influences metabolic phenotypes in rodent models.
The mitochondrial-encoded peptide MOTS-c translocates to the nucleus to regulate nuclear gene expression in response to metabolic stress
Kim KH, et al. Cell Metabolism. 2018; 28(3):516-524 (PMID 29983246)
Reports AMPK-dependent nuclear translocation of MOTS-c under glucose restriction and its interaction with stress-responsive transcription factors including NRF2.
NAD+ in aging, metabolism, and neurodegeneration
Verdin E. Science. 2015; 350(6265):1208-1213
A widely cited review setting out NAD+ as a co-substrate for sirtuins, PARPs, and cyclic-ADP-ribose synthases, and its decline as a theme in ageing and metabolic research.
Defective mitophagy in XPA via PARP-1 hyperactivation and NAD+/SIRT1 reduction
Fang EF, et al. Cell. 2014; 157(4):882-896 (PMID 24813611)
Links PARP1 hyperactivation to NAD+ depletion and reduced SIRT1 activity in a DNA-repair-deficient model, with NAD+ repletion restoring the NAD+–SIRT1 axis.
Where They Sit in Longevity Research
In ageing-focused laboratory research, MOTS-c and NAD+ are often discussed alongside other longevity-cluster compounds because each touches mitochondrial and metabolic regulation from a different angle, MOTS-c as an AMPK-activating peptide signal and NAD+ as the cofactor that gates sirtuin and PARP activity. Investigators mapping metabolic-stress responses or DNA-repair–linked pathways may reference both, alongside other longevity-cluster compounds such as Epithalon. See the individual MOTS-c and NAD+ product pages for single-compound detail.
Storage and Handling
Lyophilised (unreconstituted):Store at -20°C for long-term stability. Keep sealed and protected from light and moisture. NAD+ in particular is sensitive to moisture and should be kept desiccated.
Reconstituted:Store at 2-8°C and use within a short window. Avoid repeated freeze-thaw cycles for either compound.
Recommended solvent: Bacteriostatic water or sterile water for laboratory use.
Frequently Asked Questions
Are MOTS-c and NAD+ the same kind of molecule?
No. MOTS-c is a 16-residue mitochondrial-derived peptide encoded in mitochondrial DNA, while NAD+ is a small-molecule dinucleotide coenzyme. They are different classes of compound and are not chemical analogues of each other.
Why are MOTS-c and NAD+ compared in longevity research?
Both intersect mitochondrial and metabolic biology and both have been examined in ageing-related models. MOTS-c is studied around the AMPK metabolic-stress pathway, and NAD+ is studied around the sirtuin and PARP enzymes that depend on it, so they appear together as complementary reference points.
Which pathways is each one most associated with?
In the published literature MOTS-c is most associated with the folate–AICAR–AMPK axis and metabolic-homeostasis endpoints, while NAD+ is most associated with sirtuin deacylation, PARP-driven DNA repair, and cellular redox balance.
What purity and form does ERC supply for research?
Both are supplied as lyophilised powder at ≥98% HPLC purity, intended strictly for in-vitro laboratory research only.
Disclaimer: This information is compiled from published peer-reviewed literature and is provided for educational and research reference purposes only. It does not constitute medical advice. The compounds referenced here, sold by Enhanced Research Compounds, are intended exclusively for in-vitro research and laboratory use. They are not therapeutic goods, are not listed on the ARTG, and are not approved for human or animal consumption.