5-Amino-1-Methylquinolinium (5-Amino-1MQ)

Reviewed for accuracy by the Gorilla Research Labs research team · 2026-07-04

Small Molecule 5-Amino-1-Methylquinolinium (5-Amino-1MQ) 5-Amino-1MQ is a small molecule research compound characterized by its role as a selective inhibitor of the enzyme Nicotinamide N-methyltransferase (NNMT) in laboratory settings.

Overview & Classification

5-Amino-1MQ is a synthetic derivative of 1-methylquinolinium, classified within the chemical class of quinolinium compounds. It is primarily utilized in biochemical research as a tool to investigate the enzymatic activity of NNMT. As a small molecule, its chemical structure is designed to interact with the catalytic site of its target enzyme. For specific molecular weight, exact chemical structure, and IUPAC nomenclature, researchers should consult the provided Certificate of Analysis (COA) or the PubChem database. • Chemical class: Quinolinium derivative. • Primary research application: Enzymatic inhibition studies. • Physical state: Typically provided as a crystalline powder for laboratory dissolution.

Molecular Target & Mechanism

The primary molecular target of 5-Amino-1MQ is Nicotinamide N-methyltransferase (NNMT). NNMT is a cytosolic enzyme responsible for the N-methylation of nicotinamide, utilizing S-adenosyl-L-methionine (SAM) as a methyl donor to produce 1-methylnicotinamide (1-MNA). In vitro research models suggest that 5-Amino-1MQ acts as a membrane-permeable, small-molecule inhibitor. By occupying the binding site of the NNMT enzyme, the compound has been reported to impede the transfer of the methyl group from SAM to nicotinamide. This modulation of enzymatic activity serves to alter the local concentrations of both the substrate and the methylated product within the cellular environment of the research model. The mechanism of inhibition is generally characterized as competitive or non-competitive depending on the specific assay conditions and the concentrations of the substrate utilized in the experimental setup.

Why Researchers Use It

Researchers utilize 5-Amino-1MQ as a biochemical probe to modulate NNMT activity in controlled laboratory environments. By inhibiting this specific enzyme, investigators can observe changes in the intracellular flux of nicotinamide and SAM, which are central components of cellular bioenergetics and methylation pathways. The compound is employed to elucidate the role of NNMT in various cellular processes. By systematically inhibiting NNMT, researchers can isolate the consequences of methyl-donor depletion and nicotinamide sequestration, providing insights into the regulatory roles this enzyme plays in cellular signaling and epigenetic maintenance.

Research Context

The study of NNMT inhibition is a specialized area of molecular biology focused on understanding the regulation of NAD+ precursors and the maintenance of methyl-donor pools. Research involving 5-Amino-1MQ often centers on the enzymatic pathways that govern the conversion of nicotinamide. Laboratory investigations have sought to map the distribution of NNMT across different cell lines and tissue types. By employing 5-Amino-1MQ, researchers can verify the contribution of NNMT to the total methylation capacity of a cell, thereby distinguishing it from other methyltransferase activities. These studies are essential for mapping the complex interplay between SAM-dependent methylation and the salvage pathways of nicotinamide.

Handling, Stability & Storage for Laboratory Use

5-Amino-1MQ is intended solely for in vitro laboratory research. It should be stored in a cool, dry environment, preferably at -20°C, protected from light and moisture to maintain chemical integrity. For in vitro assays, the compound is typically dissolved in organic solvents such as dimethyl sulfoxide (DMSO) or ethanol, depending on the requirements of the specific experiment. Once dissolved, the stock solution should be aliquoted and stored at -20°C to prevent degradation. Researchers should ensure that the final concentration of the solvent in the assay medium is non-toxic to the cells or enzymes being studied. • Storage: -20°C, desiccated, and protected from light. • Solubility: Verify solubility in DMSO or aqueous buffers prior to experimental application. • Handling: Use standard laboratory personal protective equipment (PPE) including gloves and eye protection.

Purity & Analytical Verification

The reliability of research outcomes depends on the chemical purity of the compound. Analytical verification is typically performed using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) to ensure the absence of significant contaminants or degradation products. A Certificate of Analysis (COA) is provided with each batch to document the purity levels and the methods used for verification. Researchers are encouraged to review the COA to confirm that the compound meets the necessary specifications for their specific in vitro research protocols.

How It Relates to Other Compounds in Its Research Class

5-Amino-1MQ belongs to a class of research tools designed to modulate methyltransferase activity. It is often compared to other inhibitors of the SAM-dependent enzyme family. While other inhibitors may target a broader range of methyltransferases, 5-Amino-1MQ is studied for its relative selectivity toward NNMT. In comparative biochemical assays, researchers may use 5-Amino-1MQ alongside structural analogs to determine the specificity of the inhibitory effect. This comparative approach allows for the characterization of the structural requirements for effective binding to the NNMT catalytic pocket.

Frequently Asked Research Questions

How does 5-Amino-1MQ interact with the NNMT enzyme? 5-Amino-1MQ is characterized as a potent inhibitor that binds to the active site of NNMT, preventing the enzyme from methylating nicotinamide using S-adenosyl-L-methionine. Is 5-Amino-1MQ selective for NNMT? In laboratory studies, 5-Amino-1MQ has been reported to demonstrate significant selectivity for NNMT over other related methyltransferase enzymes, though researchers should always perform control assays to verify selectivity within their specific experimental model. What is the primary research application for this molecule? It is used as a biochemical tool to inhibit NNMT activity in vitro, allowing researchers to study the resulting shifts in cellular nicotinamide and SAM levels. Can this compound be used in vivo? This compound is provided exclusively for in vitro laboratory research and in vitro model systems. It is not intended for use in any living organism, including animal or human models. How is the efficacy of the inhibition measured in the lab? Efficacy is typically measured by quantifying the decrease in 1-methylnicotinamide (1-MNA) production using techniques such as liquid chromatography-tandem mass spectrometry (LC-MS/MS) following enzymatic incubation. Research use only — no structure/function or human-use claims are made.