What Is 5-Amino-1MQ? A Lab Guide to NNMT Inhibition & Uses
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5-Amino-1MQ (5-amino-1-methylquinolinium) is a small-molecule inhibitor of the enzyme nicotinamide N-methyltransferase (NNMT), used in laboratory research to study methylation and cellular energy metabolism. This guide explains what the compound is, the enzyme it targets, how that inhibition is investigated in research models, and the purity, reconstitution and storage points that matter when working with it.
Table of Contents
What Is 5-Amino-1MQ?
5-Amino-1MQ is a synthetic small molecule built on a methylquinolinium scaffold, most commonly supplied as the iodide salt and often listed under the name 5-amino-1-methylquinolinium. In research settings it is presented as a white to off-white crystalline powder with a low molecular weight (approximately 161.2 g/mol for the cation). That low weight, combined with good solubility, gives the compound favourable cell permeability — a practical advantage that makes it a convenient tool for in vitro work.
Its defining property is that it acts as an inhibitor of NNMT. Because that single enzyme sits at a junction between two important metabolic currencies — methyl groups and NAD+ — a selective, cell-permeable inhibitor is a useful probe for teasing apart how those pathways behave in controlled experiments.
Understanding NNMT
Nicotinamide N-methyltransferase is an enzyme that transfers a methyl group from the universal methyl donor S-adenosylmethionine (SAM) onto nicotinamide, a form of vitamin B3. The reaction produces 1-methylnicotinamide and S-adenosylhomocysteine. This matters for two reasons that researchers care about:
- It consumes methyl groups. Every methylation by NNMT draws on the SAM pool, so NNMT activity is one input into a cell’s overall methylation capacity.
- It diverts nicotinamide. Nicotinamide is also a precursor in the NAD+ salvage pathway, so methylating it away can influence how much is available for NAD+ regeneration.
Because NNMT expression is elevated in a number of metabolic research models, the enzyme has become a target of interest, and a selective inhibitor such as this compound is the standard way to interrogate its role experimentally.
How 5-Amino-1MQ Works
The molecule functions by inhibiting NNMT, reducing the rate at which the enzyme methylates nicotinamide. In laboratory models, researchers examine the downstream consequences of that inhibition across several connected pathways:
- NAD+ regulation: by sparing nicotinamide from methylation, the compound may influence NAD+ availability and cellular energy metabolism.
- Methylation balance: lowering NNMT activity affects how the SAM methyl pool is allocated, which underlies many downstream biochemical processes.
- Energy homeostasis: published research reports that NNMT inhibition can influence fat metabolism and energy balance in experimental animal and cell models.
The value of a small-molecule inhibitor here is control: adding a defined amount to a defined system lets researchers attribute an observed change specifically to reduced NNMT activity rather than to broader genetic manipulation.
5-Amino-1MQ Research Applications
As a cell-permeable NNMT inhibitor, the compound appears across several categories of laboratory work:
- Enzyme-activity assays: characterising the compound’s mechanism of action and measuring its effect on NNMT activity in vitro.
- Metabolic studies: investigating methylation flux, NAD+ dynamics and cellular energetics in defined models.
- Cell-based assays: applying the compound to cultured cells to probe metabolic and signalling responses.
- NAD+ quantification: pairing inhibition with NAD+ measurement to explore the link between NNMT and the salvage pathway.
5-Amino-1MQ Purity and Quality
In enzymology and cell work, reproducibility depends as much on the identity and purity of the reagent as on the experimental design. Impurities can confound an assay or shift an apparent potency, so the specifications below are worth confirming before use.
| Property | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| HPLC purity | ≥98% (HPLC-verified) |
| Molecular weight | ~161.2 g/mol (cation) |
| Common form | 5-amino-1-methylquinolinium iodide |
| Solubility | Soluble in DMSO and water |
| Storage | -20°C, protected from light and moisture |
Purity and identity should be confirmed against a batch-specific Certificate of Analysis (COA), which typically reports HPLC purity and confirms identity by mass spectrometry. See why peptide purity matters for more on HPLC verification and why it underpins reliable research data.
Reconstitution and Handling
5-Amino-1MQ is supplied as a solid and is brought into solution before use. It is soluble in both water and DMSO, so the solvent is chosen to suit the assay: aqueous buffer for many cell and enzyme systems, or DMSO for a concentrated stock. For aqueous preparations, bacteriostatic water is a common choice because its preservative lets a single vial serve multiple withdrawals under sterile technique.
- Equilibrate: bring the vial and solvent to room temperature before opening to avoid condensation on the powder.
- Add solvent gently: release it down the inside wall of the vial using sterile technique.
- Dissolve: swirl gently until the powder is fully in solution; avoid vigorous shaking.
- Aliquot: divide a concentrated stock into single-use aliquots to minimise repeated freeze-thaw cycles.
- Store: refrigerate working solutions and protect them from light.
Example calculation: dissolving 5 mg of the compound in 2 mL of solvent gives a 2.5 mg/mL stock. Adjusting the volume changes the concentration without changing the amount of material, so it is worth deciding on a target working concentration before reconstituting.
Storage
- Store the lyophilised powder at -20°C, protected from light and moisture.
- Keep the vial tightly sealed; the iodide salt can be sensitive to prolonged light exposure.
- After reconstitution, refrigerate the solution, store aliquots frozen, and minimise freeze-thaw cycles.
- Inspect solutions before use — they should be clear and free of particulates.
Related Research Compounds
Researchers studying metabolism and cellular signalling often work with this compound alongside other tools in the same catalogue:
- GHK-Cu — a copper-binding tripeptide used in collagen and tissue-remodelling research; see our GHK-Cu guide.
- BPC-157 — a peptide studied in tissue-repair and wound-healing models.
- Browse the full research catalogue for the wider range of laboratory compounds.
Frequently Asked Questions
What is 5-Amino-1MQ used for in research?
It is used to study NNMT inhibition and its downstream effects on methylation, NAD+ metabolism and cellular energetics in laboratory models.
What is NNMT?
Nicotinamide N-methyltransferase is an enzyme that methylates nicotinamide using SAM as the methyl donor, linking it to both methylation capacity and the NAD+ salvage pathway.
Is the compound soluble in water?
Yes. It is soluble in both water and DMSO, so the solvent can be matched to the experimental system.
What purity should I look for?
For most research applications, ≥98% HPLC purity is recommended, confirmed by a batch Certificate of Analysis.
How should it be stored?
Store the powder at -20°C, protected from light and moisture. Reconstituted solution should be refrigerated, aliquoted and used within a short window.
What is the molecular weight of 5-Amino-1MQ?
The cation has a molecular weight of approximately 161.2 g/mol; the supplied salt form is heavier due to the counter-ion, so confirm the exact figure on the COA.
5-Amino-1MQ for Research at Optimus Labs
Optimus Labs supplies 5-Amino-1MQ as a high-purity crystalline powder, HPLC-verified and batch-tested, with a Certificate of Analysis confirming purity and identity. Orders ship from the UK with tracked delivery, and every product is backed by third-party HPLC testing. Explore GHK-Cu, BPC-157 and the rest of the research catalogue for related laboratory compounds, or our overview of the most popular research peptides in the UK.
References
- Neelakantan H, et al. (2018). Selective inhibition of NNMT in high-fat-diet models. Biochemical Pharmacology — pubmed.ncbi.nlm.nih.gov
- Kraus D, et al. (2014). Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity. Nature — pubmed.ncbi.nlm.nih.gov
- Pissios P (2017). Nicotinamide N-Methyltransferase: More Than a Vitamin B3 Clearance Enzyme. Trends in Endocrinology & Metabolism — pubmed.ncbi.nlm.nih.gov
