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Quickly Find the Right Chains Using Attributes in SAMSON

When working with complex molecular systems, one of the recurring frustrations for molecular modelers is navigating large structures with dozens (or hundreds) of chains. Whether you’re prepping for simulations, visual analysis, or editing molecular systems, trying to find specific chains…

Making Sense of Molecular Models: How to Filter Backbones by Atom Counts in SAMSON

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When working on complex molecular systems, clarity and focus are essential. One challenge molecular modelers often face is the ability to isolate specific structural elements—like protein backbones—based on detailed chemical composition. For example, what if you only want to work…

Interactive φ/ψ Editing: A Faster Way to Tweak Protein Backbone Conformations

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Protein structure modeling often involves spotting and correcting outlier conformations in the backbone. These problematic residues can affect simulation stability, energy minimization, or interpretation of function. Fixing them typically means switching between raw coordinate editing or laborious script-based correction. But…

Avoiding common selection mistakes with presentation nodes in SAMSON

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In molecular modeling, selecting the right things – atoms, groups, visual representations – is part of almost every workflow. But when working in complex models in SAMSON, especially with presentation nodes, it’s easy to think you’ve selected something when you…

Filtering Side Chains by Atomic Composition in SAMSON

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When dealing with large biomolecular systems, keeping track of the structural components—especially side chains—can be overwhelming. If you’ve ever needed to pinpoint side chains based on the number of atoms or specific elements they contain, then you know how time-consuming…

Avoid Jumpy Movements When Animating Molecular Systems

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When presenting complex molecular transformations or simulations, one of the most frustrating problems molecular modelers face is jittery or discontinuous motion. Whether you’re creating animations to communicate results or to better understand molecular processes, the key to clear, compelling molecular…

A Quick Path to PMF Profiles with WHAM in GROMACS Wizard

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Understanding the free energy landscape of a biomolecular system is key to gaining insights into processes like binding, folding, and conformational changes. One widely used approach for this is Potential of Mean Force (PMF) analysis using the Weighted Histogram Analysis…

When Bonds Break: Handling Topology Changes in Interactive Molecular Modeling

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One of the most common hurdles in molecular modeling arises when a user attempts to edit a structure interactively and ends up frustrating the system—bonds don’t break, new atoms refuse to connect, or the energy landscape becomes unstable. If you’ve…

Make Visual Selection Easier in SAMSON with Render Preset Attributes

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When working with complex molecular systems, molecular modelers often have to visually isolate specific parts of their structures using consistent rendering styles. This is especially useful when preparing figures for publications or presentations, or when exploring specific substructures during a…

Simulating Multiple Conformations at Once: A Time-Saving Workflow for Molecular Modelers

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One of the recurring challenges in molecular modeling is evaluating how different conformations of a single molecular system behave under identical simulation conditions. Whether you’re performing Umbrella Sampling or exploring conformational variability, setting up individual simulations for each structure can…