Building complex membranes with Martini 3

Area of Science:

• Computational Biophysics
• Molecular Dynamics Simulations
• Membrane Biophysics

Background:

• The Martini model is a widely used coarse-grained force field for molecular simulations.
• Membrane systems are central to Martini's development, with Martini 3 offering improved realism.
• Accurate simulation of membrane properties is crucial for understanding biological processes.

Purpose of the Study:

• To provide a comprehensive tutorial for constructing and simulating membrane-based systems.
• To demonstrate advanced techniques for analyzing complex membrane configurations.
• To facilitate the use of Martini 3 for realistic membrane protein and lipid bilayer simulations.

Main Methods:

• Step-by-step guide for setting up membrane simulation starting configurations.
• Instructions for running initial molecular dynamics simulations.
• Methods for dedicated analysis of membrane properties and behavior.
• Techniques for simulating systems with leaflet asymmetry and curvature gradients.
• Protocols for embedding membrane proteins in simulated lipid bilayers.

Main Results:

• Demonstration of successful construction of complex membrane starting configurations.
• Validation of simulation protocols for membrane systems of increasing complexity.
• Successful analysis of membrane properties like asymmetry and curvature.
• Effective simulation and analysis of embedded membrane proteins.

Conclusions:

• Martini 3 is a powerful tool for simulating realistic membrane systems.
• The provided tutorial enables researchers to tackle complex membrane simulation challenges.
• This work enhances the application of coarse-grained simulations in membrane biophysics.