PredPPI-GReMLIN: Prediction of Protein-Protein Interactions through Mining of Conserved Bipartite Graphs
1. A novel graph-based framework, predPPI-GReMLIN, has been introduced to predict protein-protein interactions (PPIs) by integrating atomic-level physicochemical descriptors and conserved substructure mining. This method models PPI interfaces as bipartite graphs, capturing both spatial and structural details that are often overlooked by traditional sequence-based approaches.
2. The core innovation of predPPI-GReMLIN lies in its ability to detect conserved interaction patterns within protein interfaces using a graph-search strategy. By matching these patterns against a large corpus of known protein complexes, the method can predict novel interaction partners and ligands with high accuracy.
3. Evaluations on diverse datasets, including CAMP, Yeast, and TAGPPI, demonstrate superior performance compared to state-of-the-art methods. predPPI-GReMLIN achieves over 97% precision, recall, accuracy, and F1-scores in binary classification tasks, highlighting its robust predictive capabilities.
4. A significant advancement is the incorporation of solvent-accessible surface area (SASA) features, which enhances the accuracy of multi-class interaction type classification to 57.74%. This integration provides deeper insights into the physicochemical context of PPIs.
5. A case study on the SARS-CoV-2 spike-ACE2 complex further validates the method. Docking simulations using predicted ligands reproduce native-like binding energetics, with statistically significant results compared to random ligands (p=5.1×10^-9). This highlights the potential for drug discovery applications.
6. The dataset and source code for predPPI-GReMLIN are publicly available, enabling researchers to explore and build upon this innovative framework. This accessibility is crucial for advancing the field of structural bioinformatics and PPI prediction.
💻Code:
github.com/morufwork/predPPI…
📜Paper:
biorxiv.org/content/10.64898…
#ProteinInteraction #GraphMining #Bioinformatics #MachineLearning #StructuralBiology #PPIPrediction