Non-specific hydrophobic domains

Non-specific hydrophobic domains are structural regions within proteins or lipid bilayers characterized by a high density of non-polar amino acids or lipid tails. These domains are not a single molecular entity but rather a common structural feature that facilitates protein folding, membrane insertion, and protein-protein interactions through the hydrophobic effect (Kauzmann, 1959; Tanford, 1973). In pharmacology, these regions are often sites of non-specific binding for highly lipophilic compounds, such as general anesthetics, which may exert their effects by partitioning into these regions rather than binding to a specific receptor site (Eckenhoff, 2001). Because they lack a unique sequence or structure, targeting these domains typically results in low selectivity and a high potential for off-target effects. The exposure of these domains in misfolded proteins is also a hallmark of various neurodegenerative diseases, where they drive the formation of toxic aggregates (Dobson, 2003). Consequently, they are generally considered a challenge in drug design and a source of toxicity rather than a viable therapeutic target. Understanding these domains is essential for predicting drug-membrane interactions and the behavior of hydrophobic small molecules in biological systems.

Other names

Hydrophobic pocketsHydrophobic regionsLipophilic domainsNon-polar domains

Non-specific partitioning into lipophilic environments and stabilization of hydrophobic protein-ligand or protein-protein interfaces.