Managing molecular data effectively is a significant challenge for molecular modelers, especially when working on complex projects involving large molecular systems. SAMSON, the integrative molecular design platform, provides powerful organizational tools with its Folder Attributes, which allow users to categorize and retrieve data efficiently. In this blog post, we’ll explore how you can leverage the <code>Node Specification Language (NSL)</code> to handle folder attributes for enhanced molecular modeling workflows.
Why Folder Attributes Are Essential
Folders in SAMSON are more than just containers. They can represent molecular structures, hierarchical models, and other critical elements. However, finding or filtering specific elements within highly populated folders can be tedious without a proper system in place. This is where NSL folder attributes shine—they allow you to use precise, logical expressions to target exactly what you need. Whether you are sorting by number of hydrogens, visibility, or even formal charge, folder attributes streamline molecular organization with unmatched efficiency.
An Overview of Folder Attributes
Folder attributes in SAMSON are categorized into inherited attributes (from <a href=”https://documentation.samson-connect.net/users/latest/nsl/node/”>node attributes) and folder-specific attributes. This distinction makes it easier for users to manage essential characteristics based on a folder’s role in the molecular model.
Inherited Attributes
- hasMaterial: Indicates whether the folder contains material, expressed as <code>true</code> or <code>false</code>.
- hidden: Tracks visibility status and is modifiable with <code>f.h</code>.
- name: Enables searching based on folder names with expressions like <code>f.n "L*"</code>.
There are additional inherited attributes, including "<code>selected</code>," <code>selectionFlag</code>, and <code>visibilityFlag</code>, that molecular modelers can use to further define folder properties.
Folder-Specific Attributes
For deeper insights and specificity, folder-specific attributes allow you to tackle modeling problems directly. Here are some vital attributes:
- formalCharge (
f.fc): Matches folders with structures having a specific total formal charge. - numberOfAtoms (
f.nat): Retrieves folders with a specific number of atoms, useful for quickly locating large systems. - numberOfHydrogens (
f.nH): Filters folders with a given count of hydrogen atoms, which is essential in hydrogenation or reduction studies. - numberOfMolecules (
f.nm): Allows fine-tuned filtering based on molecular count within a folder. - partialCharge (
f.pc): Targets folders based on total partial charges, useful for exploring atomic charges in electrochemistry-related models.
Practical Use Case
Let’s say you are working on a protein-ligand complex and want to find folders with fewer than 3 chains. You can use:
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f.nc < 3 |
This ensures only relevant folders matching the criteria are retrieved. Similarly, to find structures with a formal charge between 6 and 8:
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f.fc 6:8 |
As a result, you reduce manual inspection errors and save valuable time by automating the search process.
Getting Started
If you’d like to explore this feature’s full potential, review the detailed examples and definitions provided in SAMSON’s Folder Attributes documentation. With practice, you can integrate NSL-based folder queries into your workflow seamlessly.
Learn more about folder attributes and their applications in SAMSON.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON here.