Spring is Molecular Docking Season
The bread and butter of computational chemistry: predicting potential binding modes, which serves as a crucial foundation for SAR analysis and design decisions, is being made available to everyone this month with the proprietary docking tool FlexX. Validated by over 10,000 citations of its original publication, FlexX is a world-class docking engine that combines scientific rigor with unparalleled speed.
FlexX is a command-line tool that can be launched conveniently with only a few simple parameters. Whether you want to predict binding modes for a handful of molecules or run entire virtual screening campaigns, FlexX provides a fast and practical way to bring your compounds into the binding site.
What Does FlexX Do?
- Predicting binding mode of ligands by flexibly placing them at the target structure.
- Applying pharmacophore constraints to guide the docking toward known or desired interaction patterns.
- Supports template-based docking when a common core or reference ligand is available.
- Covalent docking supports the automatic detection of the most commonly used warheads.
How Does FlexX Work?
At its core, FlexX utilized a incremental construction (anchor-and-grow) algorithm. Instead of treating a molecule as a single rigid body, FlexX splits the ligand into various fragments. Then it places the initial fragment into the binding site and scores it using a lighting-fast pre-scoring scheme, followed by a step-wise construction. Here, it build the rest of the molecule from the anchor, scoring intermediate solutions to find the most realistic binding poses.
Why Use FlexX?
Because docking should not be a black box.
FlexX delivers high-speed docking performance, processing ligands in less than one second per compound. This makes FlexX suitable not only for focused compound sets, but also for larger virtual screening campaigns. For mixed chemotype series, fuzzy template docking allows you to use a known bioactive conformation as a reference. FlexX then identifies the maximum common substructure, places the shared part onto the template, and flexibly docks the remanining parts of the molecule.
Its support of automated covalent docking can recognize and transform covalent warheads, such as acrylamides or nitriles, into their protein-bound state and dock them against targetable residue types. This reduced the manual preparation usually required for covalent design projects.
Furthermore, and while FlexX is most commonly used for protein targets, it can also be applied to DNA and RNA targets, giving you additional flexibility across different structure-based discovery scenearios.
Access the Tool of the Month!
You will receive full access to FlexX for the entire month of May, giving you the opportunity to explore possible binding hypotheses, and move quickly from compound idea to structural interpretation.
The license will be valid until May 31, 2026 and can be used for: