What Is 5-Amino-1MQ? NNMT Inhibitor Research Guide

What Is 5-Amino-1MQ?

5-Amino-1-methylquinolinium, usually shortened to 5-Amino-1MQ, is a small-molecule inhibitor of nicotinamide N-methyltransferase (NNMT). It is worth stating plainly at the outset: it is not a peptide. It is a quinolinium salt with a molecular weight of roughly 160 g/mol, which is a fraction of the size of the peptides it is usually shelved alongside. Researchers who assume peptide handling conventions apply to it are starting from the wrong premise.

Interest in the compound comes almost entirely from what NNMT does rather than from the molecule itself. NNMT is an enzyme that transfers a methyl group from S-adenosylmethionine (SAM) to nicotinamide, producing 1-methylnicotinamide. Because nicotinamide is a precursor in the NAD+ salvage pathway, and because the reaction consumes SAM, NNMT sits at a junction between two metabolic processes that are studied heavily in their own right.

How 5-Amino-1MQ Is Studied to Work

In published preclinical work, 5-Amino-1MQ is used as a tool compound to inhibit NNMT and observe what follows. The reasoning under investigation runs in two directions. Inhibiting the enzyme reduces consumption of nicotinamide, which is studied for its effect on intracellular NAD+ availability. It also reduces consumption of SAM, the cell's principal methyl donor, which is examined in the context of methylation capacity more broadly.

Much of the literature has focused on adipocytes, where NNMT expression is comparatively high, and on models examining energy metabolism in adipose tissue. It is important to read that work for what it is: measurements of enzyme activity and downstream markers in cell and animal models, not demonstrations of an outcome in humans.

Evidence & Regulatory Status

The evidence base for 5-Amino-1MQ is preclinical. There are no completed human clinical trials establishing safety or efficacy for any indication, and the compound holds no marketing authorisation from the MHRA, the EMA or the FDA. It is not a licensed medicine, a food supplement or a cosmetic ingredient in the United Kingdom, and it is not approved for human or veterinary administration anywhere.

That status is the reason it is supplied strictly for in-vitro laboratory research. Any published figures on dosing come from animal models and do not translate to humans; treating them as if they did would be a straightforward misreading of the source material.

Research Handling & Quality

Because it is a small molecule rather than a peptide, 5-Amino-1MQ is more chemically robust than the lyophilised peptides stored beside it. It does not carry the same susceptibility to peptide-bond hydrolysis, and it is generally supplied as a stable powder. Cool, dry, dark storage remains sensible practice, and the container should be brought to room temperature before opening to avoid condensation drawing moisture into the vial.

On sourcing, identity matters more than headline purity for a compound like this. A percentage figure tells you how much of the sample is a single species; it does not tell you which species. Ask what analytical method produced the number and request the chromatogram rather than the summary line. We supply certificates of analysis on request and publish the ones we hold in our COA library.

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