A molecular trajectory can contain far more information than is easy to interpret by watching it move. You may have a structure, a simulation, or an imported trajectory, but still be unsure what to do next: generate a path, measure how it changes, inspect protein–ligand interactions, or send a calculation to the cloud? Choosing the right next step helps turn motion into evidence you can work with.
Start with the question, not the tool
Before launching a simulation or opening an analysis tool, write down what you want to learn. Are you trying to create conformations or a path through structural changes? Do you already have a path and want to examine observables and plots? Or is your question specifically about protein–ligand interactions? These are different tasks, and the most useful starting point depends on what data you already have.
- If you need to generate molecular motion: begin with Modeling and Simulation. This is the place to add simulators, run interactive modeling, and create conformations or paths.
- If you already have a path or trajectory: go to Path Analyzer for analysis, including observables, plots, and dashboards. The path needs to be in the active document.
- If you want to examine protein–ligand interactions: use Interaction Designer as the analysis destination.
- If the workflow needs remote computation: consult Cloud computations for running jobs, monitoring them, and retrieving results.
A simple workflow that avoids a common dead end
A frequent source of frustration is arriving at an analysis step without the input it expects. Path Analyzer, for example, expects a path in the active document. If you do not yet have one, trying to begin with trajectory analysis is premature. Instead, build the workflow in stages:
- Prepare the modeling task. Identify the structure and the kind of motion or conformations you need to create.
- Run the modeling workflow. Use the simulation guidance to add and run simulators, then create the conformations or path relevant to your question.
- Check that the path is available. Before moving to analysis, confirm that the path you intend to study is present in the active document.
- Choose the analysis that matches your question. Use Path Analyzer for path or trajectory observables and plots; use Interaction Designer when the focus is protein–ligand interactions.
- Decide whether computation must be remote. Cloud workflows are optional and task-specific, and they require Computing Credits. If you are working locally and do not need remote jobs, you can leave this step out.
This sequence also makes it easier to diagnose where a workflow is blocked. If there is no path yet, return to modeling and simulation. If a path exists but the analysis is not available as expected, check that it is in the active document. If the analysis is complete but the next challenge is explaining the result, move on to visualization or sharing rather than repeating the simulation.
Keep the workflow proportional to the task
Not every project needs every part of the sequence. For interactive modeling, start with the modeling and simulation material and stop when that answers your immediate need. For a saved or imported trajectory, you can skip straight to Path Analyzer. For a local workflow, cloud computation is not a required step. This keeps the process focused and avoids spending time on tools that do not address the question in front of you.
Once you have results, the next step may be to make them easier to communicate. The documentation points to Visualize and present for figures or movies, Share and collaborate for sharing documents or collaboration access, and Automate and extend for scripted analysis and automation.
The full workflow guide is available in Simulate and analyze.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.