5-Amino-1MQ research protocols: NNMT inhibition, concentrations, and published findings

5-Amino-1-methylquinolinium, almost always written 5-Amino-1MQ, is not a peptide. It is a small-molecule inhibitor of nicotinamide N-methyltransferase (NNMT), and it is stocked alongside peptide reference standards because the metabolic research programs that use it overlap heavily with those using GLP-1 analogues and mitochondrial peptides. That distinction matters for handling: solubility, storage, and stability behave like a small molecule, not like a lyophilized peptide.

Mechanism: what NNMT inhibition actually does

NNMT catalyses the transfer of a methyl group from S-adenosylmethionine (SAM) to nicotinamide, producing 1-methylnicotinamide and S-adenosylhomocysteine. Two consequences drive the research interest:

• Nicotinamide sequestration. Nicotinamide is a precursor in the NAD+ salvage pathway. Every molecule methylated by NNMT is a molecule unavailable for NAD+ regeneration. In tissues where NNMT is highly expressed, notably white adipose tissue and liver, elevated NNMT activity correlates with reduced NAD+ availability.
• SAM consumption. NNMT is a substantial methyl sink. High NNMT activity depletes the SAM pool, which shifts the SAM to SAH ratio and alters the cell's capacity for other methylation reactions, including histone methylation.

Knockdown studies in rodent models published from 2014 onward reported that reducing NNMT expression in adipose tissue protected against diet-induced obesity, with the proposed mechanism running through increased cellular NAD+ and elevated energy expenditure in adipocytes. 5-Amino-1MQ emerged as a cell-permeable small-molecule tool to reproduce that knockdown pharmacologically rather than genetically.

The research value of 5-Amino-1MQ is that it lets you interrogate the NNMT axis acutely and reversibly, in a system where genetic knockdown would take weeks and confound developmental effects.

Concentrations reported in the literature

Published work expresses 5-Amino-1MQ exposure in two very different units depending on model system. Conflating them is the most common protocol error we see referenced.

Molecular weight for the iodide salt commonly supplied is approximately 286 g/mol, so a 1 mM stock requires roughly 0.286 mg per mL. Confirm the salt form and molecular weight on your lot certificate before computing molarity, because free base and salt forms differ enough to matter at the low micromolar range.

Reconstitution and solubility

Our 50 mg vial is the standard research unit. 5-Amino-1MQ is water soluble, which distinguishes it from many small-molecule inhibitors that require DMSO. Practical notes:

1. Bacteriostatic water is the default solvent for stock preparation. Sterile water works where the benzyl alcohol preservative would interfere with a downstream assay, but the resulting solution is single-use.
2. Prepare a concentrated stock, then dilute. A 50 mg vial in 5 mL gives 10 mg/mL, a convenient parent stock that dilutes cleanly into working ranges.
3. Aliquot before freezing. Small molecules tolerate freeze-thaw better than peptides do, but repeated cycles still introduce concentration drift through condensation on the vial wall. See our freeze-thaw stability guide.
4. Protect from light. Quinolinium compounds are photosensitive. Amber tubes or foil-wrapped aliquots are standard practice.

Tolerability signals in the preclinical record

Published rodent work reports that 5-Amino-1MQ was well tolerated across the dosing windows studied, with no significant changes in food intake reported in several diet-induced-obesity models, which is mechanistically interesting because it points toward an energy-expenditure effect rather than an appetite effect. What the literature does not contain is a substantial human safety dataset. There are no completed large-scale clinical trials, no established human pharmacokinetics, and no regulatory approval in Canada or elsewhere. Any claim you encounter about outcomes in people is extrapolating from rodent data across a species barrier that NNMT biology does not obviously respect, since NNMT expression patterns differ meaningfully between mouse and human adipose tissue.

Related reading

NNMT sits directly upstream of NAD+ availability, so this compound is frequently studied alongside NAD+ itself. See our NAD+ research overview for the salvage-pathway side of the same axis, and the 5-Amino-1MQ reference page for CAS number, molecular weight, and PubMed entry points.

Sourcing and verification

Purity matters more than any protocol detail. A concentration curve computed from a vial that is 88% peptide and 12% truncated sequence is not reproducible, and the failure is invisible until you compare it against another lot. Every Lumera Labs lot ships with a lot-specific certificate of analysis reporting HPLC-UV purity, and those certificates are posted publicly at Lab Results before you order, not emailed afterward. Orders ship from within Canada in 24 to 48 hours, free over $200 CAD, so there is no customs exposure and no multi-week transit window for temperature-sensitive material.

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