Ambit-SMIRKS

Ambit-SMIRKS implements chemical reaction representation, transformation, and search using the SMIRKS language as an extension of Ambit-SMARTS within the Ambit project, leveraging The Chemistry Development Kit (The CDK) for core chemical informatics functionality.

Key Features:

• SMIRKS Language Parsing: Parses SMIRKS linear notations into internal reaction representations using The CDK objects.
• Reaction Application: Applies stored reactions against target molecules supporting multiple site-selection modes including single, non-overlapping, non-identical, non-homomorphic, and externally specified site lists.
• Efficient Substructure Searching: Uses an efficient substructure-searching algorithm to locate reaction sites for transformation.
• Stereo Information Handling: Manages stereochemical information using basic chemical stereo elements as implemented in The CDK.
• SMARTS Syntax Support: Supports full SMARTS logical expressions including recursive SMARTS and syntax extensions for reaction specification.
• Product Post-Processing: Performs product post-processing to refine and standardize resultant molecules after transformation.

Scientific Applications:

• Standardization of Chemical Databases: Standardizes large chemical databases to ensure consistency and accuracy across datasets.
• Pathway Transformation and Prediction: Facilitates creation of pathway transformation databases and prediction of biochemical pathway transformations.

Methodology:

Ambit-SMIRKS parses SMIRKS (and SMARTS) into CDK-based internal reaction representations, applies stored reactions to target molecules using efficient substructure-search algorithms with selectable site modes, handles stereochemical information via CDK stereo elements, and performs product post-processing while integrating with The CDK.