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IsoDDE (Isomorphic Drug Design Engine)

A new drug design engine that predicts protein-ligand structures with twice the accuracy of AlphaFold 3.

- Protein-ligand structure prediction: Achieves more than twice the accuracy of AlphaFold 3. Records a 50% success rate (AF3 23.3%) even for novel protein pocket/ligand combinations with extremely low similarity (0-20%) to the training data. Models complex structural changes such as induced fit and cryptic pocket opening. Accurately predicts the cryptic pocket structure of the NKG2D homodimer, a case where AF3 failed. - Antibody-antigen interface modeling: Achieves a 39% rate of high-precision predictions (DockQ > 0.8) among 334 low-similarity protein pairs. This is 2.3 times better than AlphaFold 3 (17%) and 19.8 times better than Boltz-2 (2%). Achieves 70% accuracy (RMSD โ‰ค 2ร…) for the CDR-H3 loop, which is the most variable and difficult to predict in antibodies, suggesting the possibility of de novo antibody design. - Binding affinity prediction: Achieves the best performance among deep learning-based methods in three public benchmarks: FEP+ 4, OpenFE, and CASP16. Achieves accuracy equal to or better than the physics-based gold standard, the FEP+ method, without experimental crystal structures (FEP+ 4 benchmark r=0.85 vs FEP+ 0.78). Reduces computation time and cost to a fraction of the original. - Novel binding pocket identification: Identifies new pockets that ligands can bind to based solely on amino acid sequences, within seconds. Significantly reduces time and cost compared to experimental fragment soaking. Successfully predicts all known pockets and recently discovered novel allosteric sites in the Cereblon protein based solely on sequence. Achieves accuracy close to experimental techniques at computer speed (seconds). - Multimodal drug design: Supports the generation of candidates across various drug modalities, including small molecules, antibodies, peptides, and molecular glues (confirmed in collaboration with J&J).

๐Ÿ’ป System Requirements

๐Ÿง RAM

Undisclosed (likely based on a large-scale GPU cluster for inference, but specific specifications are not available)

๐Ÿ’พStorage

Undisclosed

โšก Installation

### 4-1. Quick Start

```
# IsoDDE is not open-source software.
# External installation/execution is not possible โ€” It is an internal system exclusively for Isomorphic Labs.
```

### 4-2. Access Method

Currently, the only way to access IsoDDE is through a restricted partnership with Isomorphic Labs. Confirmed partnerships include:

- **Novartis**: Initial agreement signed in January 2024, collaboration scope expanded in February 2025.
- **Eli Lilly**: AI drug discovery agreement signed in January 2024.
- **Johnson & Johnson**: Cross-modality, multi-target research collaboration signed on January 20, 2026. Covers small molecules, antibodies, peptides, and molecular glues.
- Internal pipeline: Drug design programs are underway in multiple therapeutic areas, approaching the stage of clinical trials.

Direct access via API calls or model downloads is not provided for academic researchers or independent companies. The technical report (page 27) is publicly available through the official technical announcement page, allowing users to view benchmark results and a methodological overview; however, the model architecture, training data, and weights are not disclosed.

๐Ÿงฌ Bio Use Cases

๐Ÿ”ฌ

Discovery of Drug Candidates for Challenging Target Proteins

It can predict reliable ligand-binding structures even for out-of-distribution targets where existing structure prediction models fail. In the most difficult similarity range (0-20%) of the Runs N' Poses benchmark, it shows more than twice the success rate compared to AF3, enabling rapid utilization in the early stages of novel target discovery for identifying hit compounds and optimizing leads without physical simulations.

๐Ÿงฌ

Accelerated Antibody Therapeutics Design

Through precise modeling of the CDR-H3 loop (achieving an RMSD โ‰ค2ร… rate of 70%), the antibody-antigen binding interface can be predicted with high accuracy in advance. By screening the binding characteristics of candidate antibodies before experimental X-ray crystallography or cryo-EM structure determination, it contributes to shortening the wet-lab cycle and reducing the time to reach a clinical candidate.

๐Ÿ’Š

Discovery of Novel Drug Targets Based on Hidden Pockets

It explores new binding pockets based solely on amino acid sequences in proteins previously classified as 'undruggable'. As seen in the cereblon case, it replaces the experimental fragment soaking process, which takes months, with a process that takes only a few seconds, dramatically accelerating the initial filtering of target expansion strategies.

๐Ÿ“„ Official Docs

๐Ÿ“ Update Notes

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