In molecular modeling, visualizing structural characteristics effectively can be a significant challenge, especially when trying to analyze biophysical properties across complex biomolecules. Colorizing residues to reflect their properties can clarify structural insights, accelerate decision-making, and make presentations much more impactful.
The SAMSON Sequence View offers an elegant solution by letting you connect sequence information seamlessly with 3D molecular models. In this blog post, we’ll look at how you can use this feature to efficiently colorize residues and immediately see corresponding updates in the 3D viewport.
Why Sequence-Based Coloring Matters
As a molecular modeler, you may often ask questions such as:
- Which regions of my protein are hydrophobic or hydrophilic?
- How can I quickly identify charged residues in the 3D structure?
- Can I highlight specific chains or residues to focus my analysis?
Answers to these questions usually involve mapping biophysical data onto the structure. SAMSON’s Sequence View makes it simple to color-code residues in your sequence based on properties such as charge, hydrophobicity, or residue type. By transferring these colors directly to the 3D viewport, you instantly gain a clearer understanding of your structure.
How to Access and Use the Sequence View
Step 1: Open the Sequence View.
You can access the Sequence View in two ways:
- From the Home menu, click the View sequence command:
- Alternatively, right-click on a structure in the 3D viewport and select Structural model > View sequence in the Context menu:
If you’re working with multi-chain structures, a pop-up will let you decide which sequences to view:
Step 2: Apply Colorization.
Once in the Sequence View, you can use colorization options to highlight residues based on selected biophysical properties. For example, you may choose a gradient to showcase hydrophobic regions or assign specific colors to charged residues. These settings will automatically apply to the residues, and the changes will reflect instantly in the 3D model, bridging the gap between sequence data and structural representation.
Why You Should Try It
Sequence-based coloring not only simplifies your analysis but also enhances how you communicate molecular interactions in presentations or reports. Seeing residue-level changes in both the sequence and 3D view improves accuracy and ensures consistency across workflows. Whether you’re working to identify active sites, analyze stability, or design interactions, this feature can save you significant time and effort.
Learn more about the Sequence View in the SAMSON documentation: https://documentation.samson-connect.net/users/latest/sequence-view/
SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.