A molecular trajectory can contain a lot of information—and still leave you unsure what to inspect first. You may have a saved path, but not know whether to focus on its changing observables, protein–ligand interactions, or simply how the structure evolves over time. A useful way forward is to treat analysis as a sequence of decisions rather than a hunt through every available tool.
First, establish what you have
If you are starting from a structure and want to create a simulation, begin with Modeling and Simulation. This is where you can add and run simulators and create conformations or paths. If you already have a path or imported trajectory, you can skip directly to analysis.
That distinction matters because Path Analyzer expects a path in the active document. Before opening it, check that the document you are working in contains the path you intend to study. If there is no path yet, return to the modeling and simulation workflow first; trying to analyze a trajectory before one is available is a workflow mismatch, not an analysis problem.
Choose the analysis based on the question
Once the path is available, decide what you want to learn from it. For a broad view of how the trajectory changes, Path Analyzer is the natural next step: it supports analysis of observables and provides plots and dashboards. Start with a question you can state plainly, such as “What changes along this path?” Then use the available analysis to examine the trajectory in relation to that question, rather than treating every plot as equally important.
If your question is specifically about protein–ligand interactions, take a focused route: use Interaction Designer. This keeps the workflow aligned with the subject of the analysis. A useful rule of thumb is: use Path Analyzer when you want to inspect trajectory observables and their evolution; use Interaction Designer when you want to analyze protein–ligand interactions.
A simple workflow to keep you oriented
- Identify your starting point. Do you have a structure to simulate, or a path or trajectory ready to analyze?
- Create a path if needed. Start with Modeling and Simulation to run interactive modeling and create conformations or paths.
- Check the active document. Confirm that the path you want to study is available there before using Path Analyzer.
- Pick the analysis that matches your question. Use Path Analyzer for observables, plots, and dashboards; use Interaction Designer for protein–ligand interaction analysis.
- Keep the result connected to the question. As you review the analysis, note what it helps you understand about structural evolution or interactions, and what remains unresolved.
This sequence is useful because it separates three different tasks that are easy to blur together: generating a path, examining its evolution, and studying interactions. It also gives you a clear place to resume if you return to the project later: check whether the path exists, confirm which document contains it, and choose the analysis according to the question.
When does cloud computing belong in the workflow?
Cloud computations are task-specific rather than a required step for every analysis. Consider the Cloud computations guide when your workflow depends on remote jobs, monitoring, or retrieving results. The documentation notes that cloud computations require Computing Credits. If you are working locally and do not need remote jobs, you can leave this step out.
After analyzing a path, you can continue in different directions: visualize and present results, share and collaborate, or explore automation and extensions. For the complete workflow overview, read the Simulate and analyze documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.