biochemical-data-connectors 1.1.0

A Python package to extract chemical, biochemical, and bioactivity data from public databases like ORD, ChEMBL and PubChem.

biochemical-data-connectors

biochemical-data-connectors is a Python package for extracting chemical, biochemical, and bioactivity data from public databases like ORD, ChEMBL and PubChem.

Overview

biochemical-data-connectors provides a simple and consistent interface to query major cheminformatics bioinformatics databases for compounds. It is designed to be a modular and reusable tool for researchers and developers in cheminformatics and drug discovery.

Key Features

1. Bioactive Compounds
   • Unified Interface: A single, easy-to-use abstract base class for fetching bioactives for a given target.
   • Multiple Data Sources: Includes concrete connectors for major public databases:
     1. ChEMBL (ChEMBLBioactivesExtractor)
     2. PubChem (PubChemBioactivesExtractor)
   • Powerful Filtering: Filter compounds by bioactivity type (e.g., Kd, IC50) and potency value.
   • Efficient Fetching: Uses concurrency to fetch data from APIs efficiently.
2. Chemical Reactions
   • Local ORD Processing: Includes a connector (OpenReactionDatabaseConnector) to efficiently process a local copy of the Open Reaction Database.
   • Reaction Role Correction: Uses RDKit to automatically correct and reassign reactant/product roles from the source data, improving data quality.
   • Robust SMILES Extraction: Canonicalizes and validates SMILES strings for both reactants and products to ensure high-quality, standardized output.
   • Memory-Efficient Processing: Employs a generator-based extraction method, allowing for iteration over massive reaction datasets with a low memory footprint.

Installation

You can install this package locally via:

pip install biochemical-data-connectors

Quick Start

Here is a simple example of how to retrieve all compounds from ChEMBL with a measured Kd of less than or equal to 1000 nM for the EGFR protein (UniProt ID: P00533).

import logging
from biochemical_data_connectors import ChEMBLConnector

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# 1. Instantiate the connector for the desired database
chembl_connector = ChEMBLConnector(
    bioactivity_measure='Kd',
    bioactivity_threshold=1000.0, # in nM
    logger=logger
)

# 2. Specify the target's UniProt ID
target_uniprot_id = "P00533" # EGFR

# 3. Get the bioactive compounds
print(f"Fetching bioactive compounds for {target_uniprot_id} from ChEMBL...")
smiles_list = chembl_connector.get_bioactive_compounds(target_uniprot_id)

# 4. Print the results
if smiles_list:
    print(f"\nFound {len(smiles_list)} compounds.")
    print("First 5 compounds:")
    for smiles in smiles_list[:5]:
        print(smiles)
else:
    print("No compounds found matching the criteria.")

Package Structure

biochemical-data-connectors/
├── pyproject.toml
├── requirements-dev.txt
├── src/
│   └── biochemical_data_connectors/
│       ├── __init__.py
│       ├── constants.py
│       ├── connectors/
│       │   ├── __init__.py
│       │   ├── bioactive_compounds_connectors.py
│       │   └── ord_connectors.py
│       └── utils/
│           ├── __init__.py
│           └── api/
│               ├── __init__.py
│               ├── mappings.py
│               └── pubchem_api.py
├── tests/
│   └── ...
└── README.md

License

This project is licensed under the terms of the MIT License.