Natural product chemical representation

natural-product-chemical-representation

Summary

Compute biosynfoni fingerprints—a molecular representation tailored specifically for natural product chemistry and bioinformatic analysis—that encode biosynthetic structural features distinct from generic molecular descriptors. Use this skill when you need a feature representation of natural product molecules optimized for downstream biosynthetic class prediction, chemical similarity search, or machine learning on natural product datasets.

When to use

You have a set of natural product molecules (or suspected natural products) in SMILES, InChI, or SDF format and need a chemical representation suitable for biosynthetic classification, structural screening, or machine learning tasks where standard generic fingerprints (e.g., ECFP) do not capture biosynthetic logic specific to natural product scaffolds and transformations.

When NOT to use

• Input molecules are synthetic compounds with no natural product ancestry or biosynthetic relevance; consider generic molecular fingerprints (ECFP, MACCS) instead.
• You need real-time fingerprint computation on very large chemical libraries (>1 million molecules) without parallelization infrastructure; biosynfoni may have latency constraints.
• Your downstream task requires human-interpretable chemical features or explicit substructure annotations; biosynfoni fingerprints are latent bit-vectors.

Inputs

• SMILES strings
• InChI strings
• SDF molecular structures file
• RDKit Mol objects

Outputs

• biosynfoni count fingerprints (bit-vectors)
• CSV file with molecule IDs and fingerprint vectors
• NumPy .npy array of fingerprints

How to apply

Install the biosynfoni package via pip (biosynfoni requires Python 3.9+; RDKit is installed as a dependency). Load molecular structures from your dataset using RDKit (Chem.MolFromSmiles, Chem.MolFromInChI, or an SDF supplier). For each molecule, instantiate the Biosynfoni class and extract the .fingerprint attribute, which returns a count-based bit-vector encoding biosynthetic structural motifs. Export fingerprints as a structured output (CSV with molecule IDs and bit-vectors, or NumPy .npy array) for downstream analysis. The fingerprint captures biosynthetic information and biochemical logic tailored to natural products, making it superior to generic molecular fingerprints for natural product-specific tasks.

Related tools

• biosynfoni (Core package for computing molecular fingerprints tailored to natural product chemistry; provides the Biosynfoni class API and command-line interface for fingerprint generation.) — https://github.com/lucinamay/biosynfoni
• RDKit (Dependency for molecular structure parsing and manipulation; required to load and represent molecules from SMILES, InChI, or SDF formats before fingerprint computation.)
• pip (Package manager for installing biosynfoni and its dependencies in development or production mode.)
• black (Code formatter used during development and testing of the biosynfoni package; not required for end-user fingerprint computation but ensures code quality standards.) — https://github.com/psf/black
• pytest (Testing framework used in biosynfoni development to verify fingerprint computation correctness and package functionality.)

Examples

from biosynfoni import Biosynfoni
from rdkit import Chem
mol = Chem.MolFromSmiles('CC(=O)Oc1ccccc1C(=O)O')
fp = Biosynfoni(mol).fingerprint

Evaluation signals

• Fingerprints are successfully computed for all input molecules without errors; each molecule yields a single count-based bit-vector of consistent dimensionality.
• Output CSV or NumPy array contains the expected number of fingerprint records matching the number of input molecules, with no missing or null values.
• Fingerprints computed from identical SMILES/InChI strings are byte-identical (deterministic output), indicating stable and reproducible computation.
• Biosynfoni fingerprints demonstrate superior discriminative power for natural product biosynthetic class prediction compared to generic fingerprints (ECFP, MACCS) when evaluated on COCONUT or similar natural product gold standards.
• Fingerprints capture biosynthetic motifs absent in generic descriptors; evidence can be obtained by comparing feature importance or embedding visualizations between biosynfoni and ECFP on a curated natural product benchmark.

Limitations

• Biosynfoni is optimized specifically for natural products; application to purely synthetic compounds may not yield biochemically meaningful representations.
• No changelog or version history documentation is available, making it difficult to track changes or compatibility across different releases.
• Fingerprint interpretation is latent (bit-level) and not directly human-readable; feature attribution or explainability of individual bits requires additional analysis.
• Computational performance on very large molecular libraries (millions of molecules) is not documented; scaling requirements are unknown.

Evidence

• [readme] a biosynformatic molecular fingerprint tailored to natural product chem- and bioinformatic research: "a biosynformatic molecular fingerprint tailored to natural product chem- and bioinformatic research"
• [readme] relating to biosynthetic information and biochemical logic: "relating to biosynthetic information and biochemical logic"
• [readme] Biosynfoni requires Python 3.9 or later. RDKit is installed as a dependency when installing Biosynfoni.: "Biosynfoni requires Python 3.9 or later. RDKit is installed as a dependency when installing Biosynfoni."
• [readme] fp = Biosynfoni(mol).fingerprint # returns biosynfoni's count fingerprint of the molecule: "fp = Biosynfoni(mol).fingerprint # returns biosynfoni's count fingerprint of the molecule"
• [readme] Write the fingerprints of all molecules in an SDF file to a CSV file: "Write the fingerprints of all molecules in an SDF file to a CSV file"
• [readme] We have used data from the COCONUT natural product database and ZINC compound database.: "We have used data from the COCONUT natural product database and ZINC compound database."
• [other] No changelog found — version history and update documentation absent: "No changelog found — version history and update documentation absent"