Related Experiment Video
Updated: Jan 9, 2026
10:59
Visualizing the Conformational Dynamics of Membrane Receptors Using Single-Molecule FRET
Published on: August 17, 2022
3.7K
Temporally resolved and interpretable machine learning model of GPCR conformational transition
Babgen Manookian1, Elizaveta Mukhaleva1,2, Grigoriy Gogoshin1
1Department of Computational and Quantitative Medicine, Beckman Research Institute of the City of Hope, Duarte, CA, USA.
Nature Communications
|December 6, 2025
Summary
Developing subtype-specific drugs for dopamine receptors D2R and D3R is challenging. Our new DRUMBEAT algorithm identifies distinct residue communities crucial for D3R conformational changes, aiding targeted drug design for neurological disorders.
Area of Science:
- Pharmacology and computational biophysics
- Machine learning applications in drug discovery
- Neuroscience and receptor dynamics
Background:
- Developing subtype-specific drugs for homologous proteins like dopamine D2 and D3 receptors is difficult due to subtle differences in their dynamic behavior and druggable sites.
- Molecular Dynamics (MD) simulations generate vast datasets, necessitating advanced analytical methods to understand protein conformational ensembles.
- Identifying key residue communities that control receptor dynamics is crucial for structure-based drug design.
Purpose of the Study:
- To introduce the Dynamically Resolved Universal Model for BayEsiAn network Tracking (DRUMBEAT) algorithm for analyzing large-scale MD simulation data.
- To validate DRUMBEAT by identifying residue communities involved in the deactivation of the beta-2 adrenergic receptor.
- To pinpoint distinct residue communities specific to dopamine D3 receptor (D3R) conformational transitions compared to D2 receptor (D2R).
Main Methods:
- Application of the interpretable machine learning algorithm, DRUMBEAT, to analyze MD simulation data.
- Validation of DRUMBEAT using simulations of the beta-2 adrenergic receptor.
- Comparative analysis of MD data for D2R and D3R to identify subtype-specific residue networks.
Main Results:
- DRUMBEAT successfully identified residue communities regulating conformational states in the beta-2 adrenergic receptor.
- Distinct and non-conserved residue communities were identified specific to D3R conformational transitions, particularly around F170^4.62–F172^ECL2 and S146^4.38–G141^34.56 contacts.
- These identified communities differ between D2R and D3R, highlighting key distinctions in their dynamic behavior.
Conclusions:
- The DRUMBEAT algorithm provides a scalable and unbiased approach for analyzing complex protein dynamics from MD simulations.
- The identified subtype-specific residue communities offer novel insights into the distinct conformational behavior of D3R versus D2R.
- This research provides a foundation for designing subtype-selective drugs targeting D3R for neuropsychiatric and substance use disorders.
Related Concept Videos
00:52¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
1.2K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.2K
01:22Activation and Inactivation of G Proteins
10.7K
Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
10.7K
01:15G Protein-coupled Receptors
16.3K
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
16.3K
01:30Transducer Mechanism: G Protein–Coupled Receptors
3.9K
G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
GPCRs are also called heptahelical,...
GPCRs are also called heptahelical,...
3.9K
01:21G-protein Coupled Receptors
131.3K
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
131.3K
01:12GPCR Desensitization
7.9K
G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
7.9K