The short version of NAMPT fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-03-12. Anything still debated is marked as such rather than presented as settled.
Two enzymatic steps define the canonical route from nicotinamide to NAD+. Nicotinamide phosphoribosyltransferase, known as NAMPT, produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN adenylyltransferases, or NMNAT enzymes, then couple NMN with ATP to form NAD+. Whether intact NMN crosses cell membranes efficiently remains an active area of investigation; some studies propose direct transport, while others emphasize extracellular dephosphorylation to nicotinamide riboside followed by uptake. The relative contribution of each route likely depends on cell type, tissue, and experimental conditions.
Trace amounts of NMN have been reported in certain plant foods, including edamame, avocado, broccoli, cucumber, and cabbage. Reported concentrations vary widely because analytical methods differ and food matrices complicate extraction. Endogenous production in cells is generally considered more quantitatively important than dietary intake, though precise human turnover rates are difficult to establish. Commercial NMN for research or consumer products is commonly made through enzymatic synthesis or chemical phosphorylation routes. Regulatory classification differs by country; in some jurisdictions NMN is sold as a supplement, while in others it is treated as a novel food ingredient or restricted substance.
Nicotinamide mononucleotide, abbreviated NMN, is a naturally occurring nucleotide found in cells. Its structure combines a nicotinamide ring, a ribose sugar, and a phosphate group. As an intermediate in the NAD+ salvage pathway, NMN is converted to nicotinamide adenine dinucleotide, a coenzyme central to cellular redox reactions. NAD+ also serves as a substrate for enzymes involved in DNA repair, stress responses, and metabolic regulation. The compound is therefore part of normal cellular biochemistry rather than an exclusively synthetic molecule.
Quality control for NMN samples often includes purity determination by HPLC, identity confirmation by mass spectrometry or NMR, and water content measurement by Karl Fischer titration. Certificates of analysis may report residual solvents, heavy metals, and microbial limits depending on the intended use. Purity values are method-dependent, so a stated percentage should be interpreted alongside the analytical procedure and detection wavelength. Reference standards help ensure that retention times and spectral data are comparable across laboratories. Researchers increasingly request independent verification because supply chains for specialty chemicals can vary in documentation.
Common laboratory methods for NMN include high-performance liquid chromatography with ultraviolet detection, liquid chromatography coupled to mass spectrometry, and nuclear magnetic resonance spectroscopy. Because the nicotinamide ring absorbs ultraviolet light, HPLC-UV at wavelengths near 260 nm can be used for purity assessment. LC-MS and LC-MS/MS provide greater sensitivity and are often applied to biological samples. Identification typically relies on matching retention time, mass-to-charge ratio, and fragmentation pattern to a reference standard.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C11H15N2O8P | Canonical beta anomer; charge state depends on pH. |
| Molar mass | 334.22 g/mol | Calculated for the neutral formula. |
| CAS Registry Number | 1094-61-7 | Common identifier for beta-nicotinamide mononucleotide. |
| Appearance | White to off-white powder or crystals | Varies with purity, hydration, and polymorphism. |
| Solubility | Freely soluble in water; low solubility in nonpolar solvents | Reported values depend on salt form and temperature. |
it is indicated in the treatment of adults who are unable to achieve sufficient glycaemic control at their maximally tolerated dose of oral metformin alone or who are already treated with the combination of vildagliptin and metformin as separate tablets. it is indicated in combination with a sulphonylurea (i.e. triple combination therapy) as an adjunct to diet and exercise in patients inadequately controlled with metformin and a sulphonylurea. it is indicated in triple combination therapy with insulin as an adjunct to diet and exercise to improve glycaemic control in patients when insulin at a stable dose and metformin alone do not provide adequate glycaemic control.
=== Synthesis === One method for preparing β-phenethylamine, set forth in J. C. Robinson and H. R. Snyder's Organic Syntheses (published 1955), involves the reduction of benzyl cyanide with hydrogen in liquid ammonia, in the presence of a Raney-Nickel catalyst, at a temperature of 130 °C and a pressure of 13.8 MPa. Alternative syntheses are outlined in the footnotes to this preparation. A much more convenient method for the synthesis of β-phenethylamine is the reduction of ω-nitrostyrene by lithium aluminium hydride in ether, whose successful execution was first reported by R. F. Nystrom and W. G. Brown in 1948. Phenethylamine can also be produced via the cathodic reduction of benzyl cyanide in a divided cell.
A notable excision was the removal of the Glen Grey and Herschel Districts, and their allocation to the newly independent Transkei, with the populations of the districts moving into the rest of Ciskei to retain their South African citizenship (which was subsequently lost when Ciskei became independent). By the 1970s, the South African government decided on the final boundaries of Ciskei, as a consolidated area, through the amalgamation of existing reserves allocated to Ciskei, and the purchase of intervening white-owned land. This amalgamation reduced the total length of Ciskei's borders, making them easier for the South African government to police, as well being an attempt to create a more viable area for the homeland.
== Bibliography == Pirie, N. W (1971). "Leaf protein:its agronomy, preparation, quality and use". IBP Handbook. Vol. 20. Blackwell Scientific Publications. Pirie, N. W (1975). "Leaf protein: a beneficiary of tribulations". Nature. 253 (5489): 239–241. Bibcode:1975Natur.253..239P. doi:10.1038/253239a0. S2CID 4196894.
=== Importance === Calciseptine has been shown to specifically inhibit the L-type voltage-gated Ca2+ channels and was the first natural polypeptide discovered with this property. Specific polypeptide inhibitors of voltage-sensitive channels are important tools in research, and were already known for voltage-sensitive Na+ channels, both voltage-sensitive and Ca2+-activated K+ channels, and for N-type Ca2+-channels. Before calciseptine was sequenced and shown to be a specific L-type calcium channel inhibitor, no specific polypeptide inhibitors were known for this type of voltage-gated channels. Specific blockers of the L-type channel were small organic molecules like 1,4-dihydropyridines. It was suggested that polypeptide inhibitors could be found in snake venoms. Calciseptine confirmed this as it was shown to not only block the L-type channels specifically, but also to do this in exactly the same spot as the 1,4-dihydropyridines. After calciseptine, other polypeptides specifically blocking the L-type channels were found as well: FS2, C10S2C2 and S4C8.
Sources: en.wikipedia.org
=== Aliases === As with many other genes, there are some common aliases found with this gene. Those aliases are Lymphocyte-Activation Gene-1 (LAG1) Interacting Protein, Transparent Testa Glabra 1 (TTG1), and Odorant Response Abnormal 4 (ODR4). The most common alias for C1orf27 is ODR4, and this is what most readily appears when searching the gene.
=== Dilution to threshold === A dilution series of a sample or extract is prepared and assessed for presence of odour. The result can be described as the odour potency of a compound. One kind of analysis is to measure the maximum dilution in the series in which odour is still perceived. The resulting value is called the flavour dilution (FD) factor in the aroma extraction dilution analysis (AEDA) developed in 1987 by Schieberle and Grosch. On the other hand, another kind of analysis is to also measure the duration of the perceived odour to compute peak areas. The peak areas are known as Charm values in the CharmAnalysis developed in 1984 by Acree and co-workers. The former can then be interpreted as the peak height of the latter. Because the odour threshold of a compound is intended to be measured from a prepared series of dilution (commonly by a factor of 2–3 with 8–10 dilutions), the precision and variation in data can be determined from the dilution factors used. Due to time demand requirements from this method and the general requirement for multiple assessors to minimise errors, having the column split into multiple odour ports would be beneficial for the method.
The brain is particularly vulnerable to chemicals that are able to cross the blood-brain barrier. Body-first and brain-first models of Parkinson's disease propose that there are two distinct avenues through which environmental toxicants can enter the nervous system: (1) ingested into the gut and affecting the enteric nervous system (body-first), or (2) inhaled through the nose and affecting the olfactory bulb (brain-first). The World Health Organization (WHO) recommends reducing exposure to environmental factors associated with PD, including pesticides, trichloroethylene (TCE), and air pollution. Traumatic brain injury and Type 2 diabetes are additional risk factors. Exercise, coffee consumption, and diets rich in fruits, vegetables, whole grains, and fish are protective factors associated with lower risk of PD.
== Usage == Drug use among elderly Americans has been studied; in a group of 2,377 people with an average age of 71 surveyed between 2005 and 2006, 84% took at least one prescription drug, 44% took at least one over-the-counter (OTC) drug, and 52% took at least one dietary supplement; in a group of 2245 elderly Americans (average age of 71) surveyed over the period 2010 – 2011, those percentages were 88%, 38%, and 64%.
Sources: en.wikipedia.org
NMN is nicotinamide mononucleotide, a nucleotide intermediate in NAD+ metabolism. It occurs naturally in cells and can also be produced synthetically for research or commercial use. Its name reflects its composition: nicotinamide, ribose, and a phosphate group.
NMN is a direct precursor in the NAD+ salvage pathway. NMNAT enzymes convert NMN and ATP into NAD+, a coenzyme used in many cellular reactions. This relationship makes NMN a focus of studies on NAD+ metabolism.
Small amounts of NMN have been reported in some plant foods, but measured levels vary and are not consistently quantified. Dietary contribution is generally considered minor compared with endogenous production. Food-matrix effects make accurate analysis difficult.
NMN is commonly detected by HPLC-UV, LC-MS, or LC-MS/MS. These methods separate the compound from related substances and identify it by retention time and mass.