Believed to act as a modulator of nicotinic acetylcholine receptors (nAChRs) activity. In vitro increases receptor desensitization and decreases affinity for ACh of alpha-4:beta-2-containing nAChRs. May play a role in the intracellular trafficking of alpha-4:beta-2 and alpha-7-containing nAChRs and may inhibit their expression at the cell surface. May be involved in the control of anxiety. Interacts with CHRNA4 and nAChRs containing alpha-4:beta-2 (CHRNA4:CHRNB2) and alpha-7 (CHRNA7) subunits.