5-Amino-1MQ (5-amino-1-methylquinolinium) is a small-molecule, cell-permeable inhibitor of the enzyme nicotinamide N-methyltransferase (NNMT), studied in laboratory and animal models of metabolism and adipocyte biology. By blocking NNMT, research has examined how the compound influences intracellular levels of nicotinamide, S-adenosylmethionine (SAM), and NAD+. This article summarizes the research background, proposed mechanism, published literature, and handling guidance for 5-Amino-1MQ as a research-use-only compound. All information here is provided strictly for in-vitro and laboratory research context and does not describe human or veterinary use.
_Last updated: July 2026._
What Is 5-Amino-1MQ?
5-Amino-1MQ is a quinolinium-based small molecule — not a peptide — first characterized as a selective, membrane-permeable inhibitor of NNMT by Neelakantan and colleagues in a 2018 report in Biochemical Pharmacology. NNMT is a cytosolic enzyme that transfers a methyl group from the universal methyl donor SAM onto nicotinamide (a form of vitamin B3), producing 1-methylnicotinamide and S-adenosylhomocysteine. Because this reaction consumes both nicotinamide (a precursor of NAD+) and SAM, NNMT activity sits at a metabolic crossroads linking NAD+ availability, cellular methylation potential, and energy balance. 5-Amino-1MQ is used in research as a chemical tool to interrogate that crossroads by reducing NNMT enzymatic activity in cells and tissues.
Research Background
Interest in NNMT as a metabolic target grew after a 2014 study in Nature by Kraus and colleagues showed that knocking down NNMT expression in white adipose tissue and liver protected mice against diet-induced obesity, implicating the enzyme in the regulation of adipose energy metabolism. That genetic work motivated the search for pharmacological NNMT inhibitors that could reproduce the effect without modifying the genome. 5-Amino-1MQ emerged from that effort as a lead compound with favorable cell permeability and enzyme selectivity, making it a widely used probe in subsequent metabolic research.
Mechanism of Action
The proposed mechanism of 5-Amino-1MQ centers on competitive inhibition of NNMT. When NNMT is inhibited, less nicotinamide is diverted into the methylation-and-excretion pathway, and less SAM is consumed. In cultured and animal models, researchers have reported that NNMT inhibition is associated with increased intracellular SAM and NAD+ levels and altered polyamine flux, including changes in ornithine decarboxylase (ODC) and spermidine/spermine N1-acetyltransferase (SSAT) activity. Because NAD+ is a cofactor for enzymes such as the sirtuins and PARPs, and because SAM governs methylation reactions, shifts in these pools provide a plausible link between NNMT activity and broader metabolic and epigenetic signaling — connections reviewed in a 2021 RSC Medicinal Chemistry overview of NNMT mechanisms and inhibitors.
Reported Findings in Adipocyte Models
In differentiating pre-adipocyte cultures, the 2018 Biochemical Pharmacology study reported that 5-Amino-1MQ produced concentration-dependent reductions in lipid accumulation, with cell viability only modestly affected at the highest tested concentrations. In diet-induced obese (DIO) mouse models, systemic administration of the inhibitor was reported to reduce adipose tissue mass and body weight over the treatment period. A 2022 study in Scientific Reports further examined NNMT inhibition combined with a reduced-calorie diet in DIO mice and reported shifts in gut microbiome composition alongside the metabolic changes. These findings are drawn entirely from cell-culture and animal research and are presented here only as scientific context.
Why Researchers Study NNMT
Beyond adipose metabolism, NNMT expression is elevated in a range of tissues and conditions, and reviews continue to position it as a target of interest across metabolic, oncologic, and aging-related research. A 2024 review in Metabolites summarized evidence that NNMT activity tends to rise over time and that its regulation of the NAD+ and methionine cycles is relevant to age-associated metabolic decline. For laboratories, 5-Amino-1MQ offers a practical, well-characterized way to probe these pathways because it is orally bioavailable in animal studies, selective for NNMT, and active in intact cells rather than only in isolated-enzyme assays.
Frequently Asked Questions
What is 5-Amino-1MQ?
It is a small-molecule (quinolinium) inhibitor of nicotinamide N-methyltransferase (NNMT) used as a research tool to study NAD+, SAM, and adipocyte metabolism in cell and animal models. It is not a peptide.
How does 5-Amino-1MQ work?
It inhibits the NNMT enzyme, reducing the methylation of nicotinamide. In published models this is associated with higher intracellular SAM and NAD+ levels and altered polyamine metabolism.
Is 5-Amino-1MQ a peptide?
No. Unlike many catalog items, 5-Amino-1MQ is a small organic molecule, not a peptide, though it is studied alongside metabolic research peptides.
What research applications is 5-Amino-1MQ suitable for?
It is used in studies of NNMT enzymology, NAD+ and methylation metabolism, adipocyte differentiation and lipid accumulation, and related metabolic signaling pathways in vitro and in laboratory animals.
What is the purity level of Dynamite Research Peptides' 5-Amino-1MQ?
Our 5-Amino-1MQ is high-purity, verified by HPLC analysis. Detailed purity data is provided on the Certificate of Analysis (COA) included with each product.
Storage & Handling
Store 5-Amino-1MQ as a lyophilized or solid powder at -20°C or below, protected from light and moisture. Prepare working solutions immediately before use with an appropriate sterile solvent as indicated on the Certificate of Analysis (COA), keep prepared solutions refrigerated, and avoid repeated freeze-thaw cycles that can degrade the compound. Handle with appropriate personal protective equipment in a well-ventilated laboratory setting.
Conclusion
5-Amino-1MQ is a well-characterized small-molecule NNMT inhibitor and a useful tool compound for studying NAD+ metabolism, methylation potential, and adipocyte biology in laboratory models. Our 5-Amino-1MQ is high-purity, third-party tested, and ships with a COA so experimental results stay reliable and reproducible.
All products are for research use only — not for human or animal consumption, and not for diagnostic or therapeutic use.