Journal
BMC BIOINFORMATICS
Volume 22, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s12859-021-04466-0
Keywords
Structure-based drug design; Protein-ligand complex; Binding affinity; Attention mechanism
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2019R1A2C3005212]
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By proposing a deep-neural network model, we improved the prediction accuracy of protein-ligand complex binding affinity, with important features of descriptor embeddings and an attention mechanism. The proposed model outperformed existing models on most benchmark datasets.
Background: Accurate prediction of protein-ligand binding affinity is important for lowering the overall cost of drug discovery in structure-based drug design. For accurate predictions, many classical scoring functions and machine learning-based methods have been developed. However, these techniques tend to have limitations, mainly resulting from a lack of sufficient energy terms to describe the complex interactions between proteins and ligands. Recent deep-learning techniques can potentially solve this problem. However, the search for more efficient and appropriate deep-learning architectures and methods to represent protein-ligand complex is ongoing. Results: In this study, we proposed a deep-neural network model to improve the prediction accuracy of protein-ligand complex binding affinity. The proposed model has two important features, descriptor embeddings with information on the local structures of a protein-ligand complex and an attention mechanism to highlight important descriptors for binding affinity prediction. The proposed model performed better than existing binding affinity prediction models on most benchmark datasets. Conclusions: We confirmed that an attention mechanism can capture the binding sites in a protein-ligand complex to improve prediction performance. Our code is available at https://github.com/Blue1993/BAPA.
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