Other receptors

The term 'Other receptors' is a non-specific categorical designation used in pharmacological databases and clinical trial registries to classify proteins that function as receptors but do not belong to major established families such as G protein-coupled receptors (GPCRs), ligand-gated ion channels, or nuclear receptors (Alexander et al., 2023). This grouping is often used for miscellaneous targets, including certain cell adhesion molecules, cytokine receptors that do not fit other schemas, or orphan receptors with poorly defined signaling pathways (Armstrong et al., 2024). Because this is a catch-all category rather than a distinct molecular entity, it lacks a singular biological function, specific disease association, or a unified mechanism of drug interaction. In therapeutic contexts, the use of this term usually indicates that a specific target has not been assigned a standard nomenclature or that the data refers to a heterogeneous set of proteins. Therefore, it cannot be considered a valid therapeutic target for drug discovery purposes without further specification of the underlying protein (IUPHAR/BPS, 2024).

Other names

Miscellaneous receptorsUnclassified receptorsNon-canonical receptorsOther protein targets

Not applicable as this is a categorical grouping rather than a specific molecular target.