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License: GNU J. Cheminform. bioRxiv Zenodo

GENiPPI

Interface-aware molecular generative framework for protein-protein interaction modulators

Protein-protein interactions (PPIs) play a crucial role in numerous biochemical and biological processes. Although several structure-based molecular generative models have been developed, PPI interfaces and compounds targeting PPIs exhibit distinct physicochemical properties compared to traditional binding pockets and small-molecule drugs. As a result, generating compounds that effectively target PPIs, particularly by considering PPI complexes or interface hotspot residues, remains a significant challenge. In this work, we constructed a comprehensive dataset of PPI interfaces with active and inactive compound pairs. Based on this, we propose a novel molecular generative framework tailored to PPI interfaces, named GENiPPI. Our evaluation demonstrates that GENiPPI captures the implicit relationships between the PPI interfaces and the active molecules, and can generate novel compounds that target these interfaces. Moreover, GENiPPI can generate structurally diverse novel compounds with limited PPI interface modulators. To the best of our knowledge, this is the first exploration of a structure-based molecular generative model focused on PPI interfaces, which could facilitate the design of PPI modulators. The PPI interface-based molecular generative model enriches the existing landscape of structure-based (pocket/interface) molecular generative model.

Framework of GENiPPI

Model Architecture of GENiPPI

Acknowledgements

The code in this repository is based on their source code release (https://github.com/AspirinCode/iPPIGAN and https://github.com/kiharalab/GNN_DOVE). If you find this code useful, please consider citing their work.

News!

[2024/11/11] Accepted in Journal of Cheminformatics, 2024.

[2024/03/15] submission to Journal of Cheminformatics, 2024.

[2023/10/10] submission to bioRxiv, 2023.

Requirements

Python==3.6
pytorch==1.7.1
torchvision==0.8.2
tensorflow==2.5
keras==2.2.2
RDKit==2020.09.1.0
HTMD==1.13.9
Multiwfn==3.7
moleculekit==0.6.7

https://github.com/rdkit/rdkit

https://github.com/Acellera/htmd

https://github.com/Acellera/moleculekit

http://sobereva.com/multiwfn/

Installation

conda env create -f environment.yml

OR

conda create --name GENiPPI python=3.6 conda

pip install -r requirements.txt


OR

conda config --add channels acellera
conda install -c acellera htmd=1.13.9

#pytorch==1.7.1
conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cudatoolkit=11.0 -c pytorch
#keras
conda install keras==2.2.2

Training


#the training model
# 0 : train
python train.py [File Index] 0

#example
python train.py 1 0
python train.py 2 0
...

#fine-tuning
# 1 : fine tuning
python train.py [File Index] 1

#example
python train.py 2 1
python train.py 3 1
python train.py 4 1
...

For the generation stage the model files are available. It is possible to use the ones that are generated during the training step or you can download the ones that we have already generated model files from Google Drive.

Generation

novel compound generation please follow notebook:

python gen_wgan.py

or

GENiPPI_generate.ipynb

Model Metrics

MOSES

Molecular Sets (MOSES), a benchmarking platform to support research on machine learning for drug discovery. MOSES implements several popular molecular generation models and provides a set of metrics to evaluate the quality and diversity of generated molecules. With MOSES, MOSES aim to standardize the research on molecular generation and facilitate the sharing and comparison of new models. https://github.com/molecularsets/moses

QEPPI

quantitative estimate of protein-protein interaction targeting drug-likeness

https://github.com/ohuelab/QEPPI

Analysis

Molecular shape

calculate NPR and PMI descriptors

Chem.Descriptors3D.NPR1(mol)
Chem.Descriptors3D.NPR2(mol)

Chem.rdMolDescriptors.CalcPMI1
Chem.rdMolDescriptors.CalcPMI2
Chem.rdMolDescriptors.CalcPMI3

https://greglandrum.github.io/rdkit-blog/posts/2022-06-22-variability-of-pmi-descriptors.html

calculate PBF descriptors

Chem.rdMolDescriptors.CalcPBF(mol)

reference
Firth, N.C., Brown, N. and Blagg, J., 2012. Plane of best fit: a novel method to characterize the three-dimensionality of molecules. Journal of chemical information and modeling, 52(10), pp.2516-2525.

TMAP visualization of chemical space

https://github.com/reymond-group/mhfp

https://github.com/reymond-group/faerun-python


pip install mhfp
pip install faerun

reference code
https://tmap.gdb.tools/?ref=gdb.unibe.ch#ex-chembl

License

Code is released under GNU AFFERO GENERAL PUBLIC LICENSE.

Cite: