Deep Learning-Guided Evolutionary Optimization for Protein Design
1 BoGA introduces a hybrid approach combining genetic algorithms with Bayesian optimization, where a surrogate model acts as a discriminator to filter candidate sequences before expensive evaluation, dramatically improving optimization efficiency.
2 The key innovation lies in decoupling sequence generation from evaluation: the genetic algorithm proposes diverse candidates through mutation, while a deep learning surrogate model prioritizes which candidates merit costly structure prediction or docking calculations.
3 The framework demonstrates superior performance across multiple tasks including beta-sheet fraction optimization, normalized hydrophobic moment maximization, and AlphaFold-guided secondary structure design, with larger proposal pools consistently yielding better results.
4 In a real-world application, BoGA successfully designed peptide binders targeting pneumolysin, a critical virulence factor of Streptococcus pneumoniae, accelerating discovery of high-confidence binders compared to standard genetic algorithms.
5 The method offers significant advantages over existing approaches like hallucination or diffusion-based methods: no requirement for large-scale pre-training, flexible objective functions without retraining, and seamless integration of advancing structure prediction tools.
6 BoGA is implemented within the modular BoPep suite, supporting interchangeable embeddings, surrogate architectures, acquisition functions, and mutation operators, making it a generalizable strategy for diverse protein design objectives.
📜Paper:
arxiv.org/abs/2603.02753
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