GPCRsignal

GPCRsignal performs molecular dynamics simulations to analyze signaling complexes between G-protein-coupled receptors (GPCRs) and effector proteins (G proteins and arrestins), characterizing receptor–effector interfaces and interaction frequencies.

Key Features:

• Curated GPCR-effector complex collection: Includes wild-type structures and structures with mutations identified by crystallography or cryo-electron microscopy, as well as user-introduced mutations.
• Molecular Dynamics Simulations: Executes molecular dynamics simulations on GPCR-effector complexes to model molecular interactions and conformational dynamics.
• Implicit water-membrane environment: Runs simulations in an implicit water-membrane environment to represent membrane effects on receptor behavior.
• Statistical analysis via multiple simulations: Supports execution and comparison of multiple simulations to obtain statistically robust interaction data.
• Dynamic FlarePlots: Provides Dynamic FlarePlots for detailed analysis of specific interaction types within individual simulations.
• Interaction frequency analysis with visualizations: Compares simulation groups using heatmaps of interaction frequencies and stick-model visualizations where interacting residues are colored and sized proportional to frequency differences.

Scientific Applications:

• GPCR signaling pathway analysis: Characterizes molecular-level receptor–effector interactions relevant to GPCR signaling pathways.
• Mutation and conformational impact assessment: Evaluates how specific mutations or conformational changes affect receptor–effector interfaces and interaction patterns.
• Mechanistic studies of drug action and therapeutic design: Provides interaction and dynamics data that inform mechanisms of drug action and support targeted therapeutic strategy development.

Methodology:

Molecular dynamics simulations are performed on curated GPCR–effector complexes (wild-type and mutated structures from crystallography or cryo-electron microscopy or user mutations) in an implicit water-membrane environment; multiple simulations are used for statistical analysis and results are analyzed with Dynamic FlarePlots, heatmaps of interaction frequencies, and stick-model visualizations of frequency differences.