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Abstract
This hands-on tutorial offers a practical guide to implementing Graph Neural Networks (GNNs) within the scope of Quantitative Structure-Activity Relationship (QSAR) modeling. Readers will be guided through a detailed, step-by-step process of applying a state-of-the-art GNN algorithm for activity predictions. It is anticipated that this practical tutorial will provide readers with sufficient knowledge to apply GNNs to their problems as well as to gain a good intuition of the underlying concepts. Specifically, the first part of this tutorial introduces the basic theory of GNNs for QSAR, including molecular graphs and their transformation in the GNN. The second part translates this theory into practical code, culminating in a working implementation of a QSAR model using a GNN. Basic knowledge of QSAR modeling and basic proficiency in the Python programming language and Keras deep learning framework is required. The code for the implementation detailed in this tutorial is available at https://github.com/akensert/molgraph/.
| Original language | English |
|---|---|
| Article number | 343046 |
| Number of pages | 12 |
| Journal | Analytica Chimica Acta |
| Volume | 1331 |
| DOIs | |
| Publication status | Published - 1 Dec 2024 |
Bibliographical note
Funding Information:The importance of QSAR modeling for toxicity predictions was expressed in 2014 when the organizers of Tox21 (Toxicology in the 21st Century) challenged invited participants to develop computational methods for predicting the toxicity of chemical compounds [1,2]. More specifically, the challenge was aimed at discovering modern methods capable of accurately predicting the activity of chemical compounds against specific types of receptors in the body (Fig. 1), including Steroid Receptors (SR) and Non-Steroid Receptors (NR), which when activated, may disrupt biological pathways in ways that may result in toxic effects. Among the various computational methods tested, including Random Forests and Support Vector Machines (often operating on molecular descriptors [3]), a Deep Neural Network (DNN), known as DeepTox, demonstrated superior performance for this specific challenge [4]. DeepTox, with its fully-connected neural network (FCNN) architecture, operated on a specific type of numerical representation of molecules, known as extended-connectivity fingerprints (ECFP) [5], which directly leveraged the graph structure of molecules to capture the presence or absence of molecular substructures of different radii.Alexander Kensert is funded by a joint initiative of the Research Foundation Flanders (FWO) and the Walloon Fund for Scientific Research (FNRS) (EOS \u2013 research project \u201CChimic\u201D (EOS ID: 30897864)).
Funding Information:
Alexander Kensert is funded by a joint initiative of the Research Foundation Flanders (FWO) and the Walloon Fund for Scientific Research (FNRS) (EOS \u2013 research project \u201CChimic\u201D (EOS ID: 30897864)).
Publisher Copyright:
© 2024
Keywords
- Bioinformatics
- Computational chemistry
- Deep learning
- Neural networks
- Predictive modeling
- Toxicity predictions
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Dive into the research topics of 'A hands-on tutorial on quantitative structure-activity relationships using fully expressive graph neural networks'. Together they form a unique fingerprint.Projects
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OZRMETH7: BruChrom: Breaking Boundaries in Chromatography
Desmet, G. (Administrative Promotor)
1/01/21 → 31/12/27
Project: Fundamental
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