NCGC Scaffold Hopper is a public domain cheminformatics client-server application developed by the National Center for Advancing Translational Sciences (NCATS) (formerly the NIH Chemical Genomics Center – NCGC). Within structural bioinformatics and computational drug discovery, it is primarily used to perform substructure analysis, map chemical spaces, and navigate molecular frameworks via a technique known as scaffold hopping. 💡 Core Concept: What is Scaffold Hopping?
In medicinal chemistry, scaffold hopping is the identification of structurally diverse molecular backbones that preserve the original core biological activity and 3D interaction capabilities (pharmacophores) of a target molecule. Researchers use scaffold hopping to:
Bypass intellectual property (IP): Generate novel, patentable core structures that mimic an established drug’s therapeutic effect.
Optimize ADMET properties: Swap out a core scaffold that causes toxicity or poor metabolic stability for a safer chemical framework.
Expand hit-to-lead chemical diversity: Uncover distinct chemical classes from high-throughput screening data. 🛠️ Key Functionalities of the NCGC Scaffold Hopper
The NCGC Scaffold Hopper tool manages large collections of bioactive compounds (such as ChEMBL datasets) and processes them using structural bioinformatics metrics:
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