Predicting accurate protein-ligand binding affinity is important in drug discovery. This code implements fusion network model to benefit from Spatial Grach CNN and 3D CNN models to improve the binding affinity prediction. The code is written in python with Tensorflow and Pytorch.

- Tensorflow 1.14 or higher

• PyTorch 1.4 or higher
• PyTorch Geometric Feature)
• rdkit (optional)
• pybel (optional)
• pdbfixer (optional)
• tfbio (optional)

The implemented networks use a 3D atomic representation as input data in a Hierarchical Data Format (HDF5). Each complex/pocket data is comprised of a list of atoms with their features including 3D coordinates of the atoms (x, y, z) and associated features such as atomic number and charges. For more detail, please refer to the paper in the Citing LIST section.

Note that the original 3D-CNN implementation used in the paper below has been moved to 3dcnn_tf. A new version using pytorch has been released in model/3dcnn

To train or test 3D-CNN, run model/3dcnn_tf/main_3dcnn_pdbbind.py. Here is an example comand to test a pre-trained 3D-CNN model:

python main_3dcnn_pdbbind.py --main-dir "pdbbind_3dcnn" --model-subdir "pdbbind2016_refined" --run-mode 5 --external-hdftype 3 --external-testhdf "eval_set.hdf" --external-featprefix "eval_3dcnn" --external-dir "pdbbind_2019"

In this new version, the voxelization process is done on GPU, which improves performance/speed-up. The new version is located in model/3dcnn

To train, run model/3dcnn/main_train.py To test/evaluate, run model/3dcnn/model_eval.py

example evaluation: python main_eval.py --data-dir [directory storing data hdf and csv files] --mlhdf-fn [hdf file name] --model-path [full path to model checkpoint file (.pth)] --complex-type [1: crystal, 2: docking]

python main_eval.py --data-dir /a/b/c --mlhdf-fn data_ml.hdf --model-path d/e/model_3dcnn_01.pth --complex-type 2 --save-pred --save-feat

Note that model/3dcnn/data_reader.py is a default data reader that reads our ML-HDF format described above. Please use your own data_reader to read your own format.

To train or test SG-CNN, run model/sgcnn/src/train.py or model/sgcnn/src/test.py.

For an example training script, see model/sgcnn/scripts/train_pybel_pdbbind_2016_general_refined.sh

To train or test fusion model, run model/fusion/main_fusion_pdbbind.py

python main_fusion_pdbbind.py --main-dir "pdbbind_fusion" --fusionmodel-subdir "pdbbind2016_fusion" --run-mode 3 --external-csvfile "eval_3dcnn.csv" --external-3dcnn-featfile "eval_3dcnn_fc10.npy" --external-sgcnn-featfile "eval_sgcnn_feat.npy" --external-outprefix "eval_fusion" --external-dir "pdbbind_2019"

We trained all of the networks above on pdbbind 2016 datasets. Particularly, we used general and refined datasets for training and validation, and evaluated the model on the core set (see sample_data/core_test.hdf).

The checkpoint files for the models are made available under the Creative Commons BY 4.0 license. See the license section below for the terms of the license. The files can be found here: ftp:https://gdo-bioinformatics.ucllnl.org/fast/pdbbind2016_model_checkpoints/.

Note that the new 3dcnn checkpoint for pytorch (model_checkpoint_3dcnn.tgz) was trained on pdbbind 2019 refined dataset.

We make available the hold-out test set from the manuscript here: sample_data/PDBSPHERES_EVAL_SET.csv

To contribute to FAST, please send us a pull request. When you send your request, make develop the destination branch on the repository.

0.1

FAST was created by Hyojin Kim ([email protected]), Derek Jones ([email protected]), Jonathan Allen ([email protected]).

This project was supported by the American Heart Association (AHA) project (PI: Felice Lightstone).

If you need to reference FAST in a publication, please cite the following paper:

Jones, D., Kim, H., Zhang, X., Zemla, A., Stevenson, G., Bennett, W. F. D., Kirshner, D., Wong, S. E., Lightstone, F. C., & Allen, J. E. (2021). Improved Protein-Ligand Binding Affinity Prediction with Structure-Based Deep Fusion Inference. Journal of Chemical Information and Modeling, 61(4), 1583–1592. https://doi.org/10.1021/acs.jcim.0c01306

@ARTICLE{Jones_Kim_improved_2021,
  title    = "Improved {Protein-Ligand} Binding Affinity Prediction with
              {Structure-Based} Deep Fusion Inference",
  author   = "Jones, Derek and Kim, Hyojin and Zhang, Xiaohua and Zemla, Adam
              and Stevenson, Garrett and Bennett, W F Drew and Kirshner, Daniel
              and Wong, Sergio E and Lightstone, Felice C and Allen, Jonathan E",
  journal  = "J. Chem. Inf. Model.",
  volume   =  61,
  number   =  4,
  pages    = "1583--1592",
  month    =  apr,
  year     =  2021,
  language = "en"
}

FAST is distributed under the terms of the MIT license. All new contributions must be made under this license. See LICENSE in this directory for the terms of the license. SPDX-License-Identifier: MIT LLNL-CODE-808183

Checkpoint files are provided under the Creative Commons BY 4.0 license. See LICENSE-CC-BY in this directory for the terms of the license.
LLNL-MI-813373