Description
5-Amino-1MQ is a synthetic small-molecule inhibitor of nicotinamide N-methyltransferase (NNMT). A cytosolic enzyme that methylates nicotinamide using S-adenosyl-methionine (SAM) as a methyl donor, diverting both nicotinamide and SAM away from other metabolic processes in the process. Unlike the peptides, 5-Amino-1MQ is a membrane-permeable quinolinium compound that reaches its target intracellularly rather than binding a cell-surface receptor. Its pharmacology in adipocyte models — including selectivity profile, intracellular NAD+ effects, and SAM balance — was characterized in detail by Neelakantan et al. (Biochemical Pharmacology, 2018). Researchers studying the broader NAD+ salvage pathway and related mitochondrial signaling compounds can find additional context in the mitochondrial and cellular peptides research overview.
Key Characteristics
- Selective NNMT inhibitor with documented membrane permeability — accesses cytosolic enzyme directly, which distinguishes its experimental role from extracellular receptor ligands
- By blocking NNMT-mediated methylation of nicotinamide, more substrate remains available for NAD+ resynthesis via the salvage pathway — a mechanistically distinct approach from direct NAD+ supplementation, such as NAD+, which adds precursor downstream rather than reducing enzymatic drain upstream
- NNMT inhibition also affects SAM/SAH balance — SAM is consumed in the methylation reaction, so NNMT blockade preserves methyl-donor availability for other cellular methylation processes including histone modification
- Research use extends beyond adipose tissue models: NNMT accumulation in aged skeletal muscle has been linked to reduced satellite cell activity and NAD+ depletion, making this compound relevant in muscle biology research contexts as well
- The evidence base is preclinical — no published human pharmacokinetic or clinical trial data exist for 5-Amino-1MQ specifically
Handling and Storage
Store as lyophilized powder in a cool, dry location away from heat, moisture, and direct light. Refrigeration is recommended for extended storage. Unlike many peptide-based compounds, 5-Amino-1MQ shows relatively greater stability under standard conditions, though controlled storage remains important for maintaining analytical consistency across experiments.
FAQs
What is 5-Amino-1MQ?
5-Amino-1MQ (5-amino-1-methylquinolinium) is a synthetic small-molecule inhibitor of NNMT, the enzyme that methylates nicotinamide to 1-methylnicotinamide. It is not a peptide. It is a membrane-permeable quinolinium compound that reaches its target enzyme inside the cell rather than binding a surface receptor. Researchers use it to study how NNMT inhibition affects intracellular NAD+ availability, SAM balance, and adipocyte signaling in preclinical models.
How does 5-Amino-1MQ differ from NAD+ supplementation in research models?
NAD+ and its precursors add substrate to the NAD+ pool directly. 5-Amino-1MQ acts at an earlier point — it blocks the enzyme that consumes nicotinamide before it can be recycled into NAD+. The two approaches address different parts of the same pathway, which is why some preclinical study designs have examined them in combination rather than as alternatives.
How should 5-Amino-1MQ be stored?
As a lyophilized powder, store in controlled conditions away from heat, moisture, and light. Refrigeration is recommended for long-term storage, and repeated freeze-thaw cycles should be avoided to preserve compound integrity across experimental use.
