Extraction and analysis of chemical modification patterns in drug development

Area of Science:

• Medicinal Chemistry
• Drug Discovery
• Computational Chemistry

Background:

• Drug development involves continuous modification of prototypic compounds.
• KEGG DRUG database and structure maps capture historical medicinal chemistry knowledge.
• Understanding chemical modification patterns is crucial for drug design.

Purpose of the Study:

• To extract and characterize chemical modification patterns from approved drugs.
• To identify relationships between core structures and peripheral fragments in drug modifications.
• To develop a systematic approach for in silico drug modifications.

Main Methods:

• Identified 236 core structures and 506 peripheral fragments using fingerprints and hierarchical clustering.
• Analyzed position-dependent relationships between core structures and peripheral fragments.
• Converted drug pairs into peripheral fragment changes and analyzed transformation profiles via clustering.

Main Results:

• Identified 125 distinct chemical modification patterns from KEGG DRUG structure maps.
• Revealed specific fragment-to-site modification tendencies on core structures.
• Demonstrated application of identified patterns for reconstructing drug structure maps.

Conclusions:

• A systematic method for extracting chemical modification patterns from drug databases was developed.
• The identified patterns offer insights into medicinal chemists' strategies.
• The approach holds potential for advancing in silico drug design and modification.