For molecular modelers, efficiently running simulations across multiple conformations or systems can often be a critical, time-consuming challenge. The GROMACS Wizard in SAMSON allows users to utilize batch computations and streamline their molecular dynamics simulations, saving valuable time and reducing manual setup efforts.
Imagine having to simulate dozens of protein structures or different molecular conformations. Wouldn’t it be great if you could apply the same workflow to all of them, without needing to configure each project by hand? With SAMSON’s GROMACS Wizard, you can do exactly that. Here’s how.
Why Batch Computations?
Running batch computations is ideal when:
- You want to apply the same GROMACS workflow to different conformations of a single molecular system (e.g., for umbrella sampling).
- You need to simulate a set of different systems (e.g., applying uniform parameters to multiple protein models).
This functionality removes repetitive tasks, ensuring consistency and allowing for both local and cloud-based simulations. Let’s explore how to set up batch computations when working with a single system and many conformations.
Preparing Batch Computations for a Single System
To implement batch computations for several conformations of the same system:
- Load your trajectory or conformations: You can easily load trajectories into SAMSON through
Home > File > Open(Ctrl/Cmd + O) or drag-and-drop files directly. Alternatively, SAMSON offers tools to create conformations, such as molecular editors or extensions like Ligand Path Finder. - Select conformations: Once your conformations are in SAMSON, follow these steps:
- Select either a set of conformations where each conformation will act as an initial starting point for a subproject, or a path where each frame of the trajectory is designated as an initial state.
- Click the Set conformations or a path button to confirm your selection. A slider is available to preview conformations.
- Prepare the batch: In the GROMACS Wizard’s Prepare tab, you can configure the molecular system’s force field, solvent type, periodic box, and any other simulation-specific details. Leveraging batch-specific options like Box lengths or Solute-box distance allows for flexibility in defining how the periodic box fits around your conformations, which can significantly save computation time.
Once the preparation is complete, SAMSON will generate a batch project with separate subfolders for any individual conformation. These can be used for the next steps of simulation, such as minimization, equilibration, or production runs—all executed either locally or in the cloud.
Visualizing and Running Simulations
If you’ve used the Batch preparation functionalities, you can preview how the periodic box fits each conformation and adjust settings as needed. This ensures precision for challenging molecular dynamics scenarios that involve many conformations or systems.
Batch simulations can either be run locally or submitted to the cloud. The workloads are efficiently distributed, as SAMSON creates separate jobs for each conformation:
- For local computations, you can monitor and manage jobs (e.g., set priorities or cancel them) using the Local jobs window.
- For cloud computations, jobs can be queued and monitored in real time using the Cloud jobs window.
Streamline Your Simulations Today
Batch computations in SAMSON’s GROMACS Wizard simplify running simulations, making large-scale studies more manageable. For a complete guide, visit the original documentation page to learn more.
SAMSON and all SAMSON Extensions are free for non-commercial use. Download SAMSON now at https://www.samson-connect.net.