For molecular modelers, running simulations for a wide array of molecular systems or conformations can be a daunting task. Repeatedly setting up simulations for each system, fine-tuning parameters, and organizing numerous projects can consume significant time and energy. The GROMACS Wizard within SAMSON offers an elegant solution to this issue: batch computations. Whether you’re setting up simulations for multiple conformations of a single system or multiple distinct molecular systems, batch projects streamline the workflow and reduce repetitive steps.
The Power of Batch Projects
Batch projects in GROMACS Wizard allow you to prepare, minimize, equilibrate, and simulate systems in batch, removing the hassle of managing them individually. This feature is ideal for:
- A single molecular system with numerous initial conformations. For instance, if you’re conducting Umbrella Sampling, batch setups ensure every conformation is treated as a separate subproject within the batch.
- Different molecular systems. If you’re running computations for multiple protein systems using identical parameters, batch projects enable efficient preparation and execution.
Preparing a Batch Project
Setting up a batch project is straightforward:
- Collect and prepare trajectories or conformations that you wish to include in the batch. You can create these directly in SAMSON using various tools such as editors (Twister) or extensions like Normal Modes Analysis.
- Load the conformations or a trajectory into SAMSON via Home > File > Open or simply drag and drop.
- Open the Prepare tab in the GROMACS Wizard. Select your molecular system and initial conformations or trajectory. Enable the [Optional] Batch preparation feature and click on Set conformations or a path. You can view the number of conformations and navigate through them using the slider.
- Define the periodic box for your system. Choose the Box lengths option to apply a unified box size across all conformations, or the Solute-box distance option for unique box sizes per conformation. Always ensure box dimensions respect the minimum image convention.
- Click Prepare to finalize your batch project setup. Prepared systems will be stored in numbered subfolders for easy management.
Running Simulations on a Batch Project
After preparation, the GROMACS Wizard facilitates smooth transitions to subsequent steps such as minimization, equilibration, and molecular dynamics. Select From batch folder as the input to automatically include all prepared subfolders.
Simulations can be launched either locally or in the cloud:
- Local simulations create separate jobs for each subfolder, which can be managed in the Local jobs window. Prioritize, cancel, or import individual jobs as needed.
- Cloud simulations generate corresponding Cloud jobs for each subfolder. Monitor job progress and download results from the Cloud jobs window.
Advantages of Batch Processing
Using batch projects not only saves time but also ensures consistency in parameter application across systems. This is particularly beneficial for large-scale studies where reproducibility and efficiency are critical.
Learn more about batch computations in GROMACS Wizard by visiting the official documentation page.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON here.