Technology Synergy Deciphers the Flavor Perception Mechanism of Strong-Flavor Liquor: A Study on the Interaction of Core Active Substances, cAMP Signaling Axis, and Odorant Receptors
摘要
To clarify the core flavor-active compounds in strong-flavor liquor (SFL) and their interaction mechanisms with odorant receptors (ORs), this study integrated Headspace Solid-Phase Microextraction Coupled with Gas Chromatography-Mass Spectrometry (HS-SPME-GC-MS), database mining and molecular docking. Volatile compounds in SFL were identified via HS-SPME-GC-MS, and 17 core substances (e.g., ethyl caproate, ethyl octanoate) were screened using odor activity value (OAV) > 1, blood-brain barrier (BBB) permeability, and ternary criteria (Log S > −4, Consensus Log Po/w < 5, molecular weight < 300 Da). A total of 93 intersecting targets were obtained from 314 compound targets and 160 olfactory targets, with 8 core targets (EGFR, DRD2, MAOB, etc.) organized into 4 functional modules. Key pathways included neuroactive ligand-receptor interaction and cAMP signaling. Molecular docking showed 90.4% of ligand-target pairs had binding free energy < −4.5 kcal/mol, with Benzenepropanoic acid, ethyl ester (M15) and MAOB having the lowest (-7.8 kcal/mol). This study provides a theoretical basis for SFL flavor regulation and olfactory perception research.
Graphical Abstract