Dopamine Receptors Interaction Profile

Dopamine Receptors Interaction Profile maps binding interfaces between human dopamine receptors (D1R, D2R, D3R, D4R, D5R) and intracellular partners to elucidate structural determinants of GPCR coupling.

Key Features:

• Structural Characterization: Employs homology modeling using templates including the β2-adrenergic receptor bound to Gs, rhodopsin bound to Gi, neurotensin receptor-1, and muscarinic 2 receptor bound to arrestins to generate models of dopamine receptor complexes.
• Comprehensive Interface Analysis: Provides detailed descriptions of protein–protein interfaces across the human dopamine receptor family and intracellular partners, including arrestins (Arr2, Arr3) and G-proteins (Gi1, Gi2, Gi3, Go, Gob, Gq, Gslo, Gssh, Gt2, Gz).
• Distinct Structural Insights: Identifies distinct structural and dynamical properties of arrestins versus Gs- and Gi-family G-proteins and pinpoints structural motifs involved in selective coupling of D1-like and D2-like receptors.
• Large-Scale Modeling: Conducts a large-scale analysis comprising 50 structural models to investigate determinants of GPCR–intracellular partner interfaces.

Scientific Applications:

• Signaling and physiology: Elucidates structural bases of dopaminergic signaling to inform studies of receptor signaling and physiological properties.
• Drug target characterization: Characterizes receptor–partner interfaces to support structure-based investigations of pharmacology and selective targeting of dopamine receptors.
• GPCR research support: Supports basic and applied research into GPCR biology and the development of pharmacological interventions for disorders involving dopaminergic signaling.

Methodology:

A computational pipeline integrates homology modeling with structural analysis using known templates (β2-adrenergic receptor–Gs, rhodopsin–Gi, neurotensin receptor-1, muscarinic 2 receptor–arrestin) to build and analyze 50 models of D1R–D5R in complex with G-proteins (Gi1, Gi2, Gi3, Go, Gob, Gq, Gslo, Gssh, Gt2, Gz) and arrestins (Arr2, Arr3).