Phenotypic screening has been gaining increasing attention in small-molecule drug discovery, complementing target-based approaches. Historically, most drugs have been identified using phenotypic drug discovery (PDD) techniques, and today, both target-based and phenotypic screening are widely applied. Modern phenotypic assays, such as cell proliferation and selective growth inhibition, have become essential tools in oncology and infectious disease drug discovery.
A successful phenotypic screening library must cover a broad spectrum of biological targets and molecular pathways, serving as a strong starting point for drug discovery projects. The most effective approach involves selecting a chemically diverse compound set, which takes into account molecular scaffolds, bioactive chemical space, and physicochemical properties. In recent years, integrating known bioactivity data into compound selection has significantly advanced phenotypic screening. By combining chemical diversity with biological relevance, researchers can maximize the chances of identifying novel drug-like molecules.
Possessing one of the largest screening compound collections on the market, Life Chemicals offers two proprietary phenotypic libraries to accelerate cell-based phenotypic drug discovery:
- ChemDiversity Phenotypic Library: 7,600 compounds optimized for structural diversity
- BioDiversity Phenotypic Library: 15,900 compounds enriched with biologically active molecules and natural product-like compounds
By combining chemical space exploration with biologically relevant compound selection, our phenotypic screening libraries provide an unparalleled source for researchers in drug discovery, high-throughput screening (HTS), and lead optimization. Both Screening Libraries feature:
- High chemical and biological diversity
- Optimized physicochemical properties for drug screening
- Drug-like compounds (PAINS-free, Ro5-compliant, low toxicity)
The compound selection can be customized based on your requirements, cherry picking is available.
Please, contact us at orders@lifechemicals.com for any additional information and price quotations.
For a pre plated set based on this Screening Library, please explore our Pre-plated Focused Libraries.
ChemDiversity Phenotypic Library
This Screening Set has been designed based on the assumption that chemical diversity leads to biological diversity, ensuring a broader coverage of drug targets and molecular processes. While some areas of chemical space may have limited biological relevance, our carefully selected, lead-like, and drug-like compounds have been chosen to maximize screening success.
Based on the proprietary HTS Compound Collection, the ChemDiversity Phenotypic Library was refined through multiple selection steps (Fig. 1), resulting in 7,600 structurally diverse, lead-like and drug-like screening compounds enveloping the broadest chemical space.
The selection criteria included:
- Structural diversity to ensure far-reaching target engagement
- Elimination of PAINS, Ro5 violations, Veber non-compliant structures, and reactive/toxic groups
- Optimization for solubility and cell permeability to enhance bioavailability
Fig. 1. General preparation workflow of the ChemDiversity Phenotypic Library.
Representative screening compounds from the Life Chemicals ChemDiversity Phenotypic Screening Library
BioDiversity Phenotypic Library
This Screening Set features around 15,900 compounds selected with a unique approach: prioritizing maximum bioactivity diversity rather than just structural dissimilarity. This specialized compound set is ideal for phenotypic drug discovery, ensuring broad biological relevance across multiple therapeutic areas.
Key Features of the BioDiversity Phenotypic Library
- 6,300+ bioactive compounds with experimental biological activity, including approved and experimental drugs from the ChEMBL and DrugBank
- 3,800 analogs of these bioactive compounds, selected via 2D fingerprint similarity search (Tanimoto ≥ 0.85)
- 5,700 natural product-related compounds, including 1,200 natural-like fragments, to enhance biological relevance
- Curated for optimal physicochemical properties, ensuring no reactive, toxic, PAINS, or low-solubility compounds
- Enhanced with bioactivity data, including compounds’ bioactivity profiles in the ChEMBL database and various compound annotations (such as UniProt IDs of all targets associated with each compound)
The library design process is illustrated in Fig. 2. It follows strict filtering criteria to exclude reactive, toxic and PAINS compounds, as well as compounds with low water solubility (LogSw) and Caco/MDCK cell permeability (calculated data). Additionally, the bioactivity spectrum (Fig. 3) showcases the remarkable target range of the library, making it a powerful tool for phenotypic screening in oncology, infectious diseases, and other therapeutic areas.
Representative screening compounds from the Life Chemicals BioDiversity Phenotypic Screening Library
Fig. 2. General preparation workflow of the BioDiversity Phenotypic Library.
Fig. 3. Bioactivity distribution by protein/drug target class within the BioDiversity Phenotypic Library. Some categories may partially overlap.