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Cheminformatics

Accurate structural modeling of chemically diverse molecular interfaces with Vilya-2

Pascal Sturmfels, Naozumi Hiranuma, Milad Salem, Benjamin D. Sellers, Stephen Rettie, Ivan Anishchanka

Featured August 10, 2026

Original Paper

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Simply

A new AI model called Vilya-2 learns how all atoms in any molecule fit together, like LEGOs, to predict how drugs bind to proteins, even for tricky new shapes, and it knows how sure it is about its predictions.

In depth
The paper introduces Vilya-2, a diffusion transformer that significantly improves the accuracy and generalization of molecular structure prediction, especially for complex peptide therapeutics. It achieves this by employing a unified all-atom representation for all molecular types, enabling transfer learning and robustly modeling interactions with protein targets. The model generates diverse structural ensembles and ranks them with a calibrated confidence metric, leading to state-of-the-art performance in peptide interface prediction and small-molecule docking.

Key Takeaways

  • 1
    Vilya-2 utilizes a unified all-atom representation for all molecular entities (proteins, peptides, small molecules), overcoming limitations of residue-level tokenization in previous models and enabling broad transfer learning.
  • 2
    The model is a diffusion transformer that generates diverse structural ensembles and employs a well-calibrated confidence metric to accurately rank predictions, leading to superior performance in predicting protein-peptide interfaces and small-molecule docking.
  • 3
    Vilya-2 demonstrates exceptional generalization capabilities to novel protein-ligand complexes, large macrocycles, and miniproteins unseen during training, and can be fine-tuned as a foundation model for downstream tasks like activity prediction.

Conceptual Flow

HIGH LEVEL
1
Methodology: Unified All-Atom Modeling

The model sees all parts of molecules, big or small, as tiny building blocks, helping it learn how everything fits together.

Protein Parts
Drug Parts
Combine All Parts
Single Molecule Map
2
Results: Accurate & Generalizable Predictions

This new way of seeing molecules helps the model guess their shapes much better and for many more types of drugs than old methods.

Old Guessing
New Guessing
Compare Accuracy
New Guessing Wins