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Molecular Diversity

Molecular Diversity

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Bayesian active learning-aided structure-based virtual screening reveals novel inhibitors of mutant IDH1

Published:15 October 2025 DOI: 10.1007/s11030-025-11381-6 PMID: 41091333
Sen Xu,?Yue Yang,?Chao Chen,?Xiaolong Lv,?Xiaojun Lei,?Haigang Wu,?Yuguang Lei

Abstract

Mutations in Isocitrate dehydrogenase 1 (IDH1) create neoenzymatic activity that drives the oncometabolite 2-hydroxyglutarate, motivating selective small-molecule inhibitors. Here, we present a dual-strategy pipeline that integrates Bayesian neural network (BNN)-aided structure-based virtual screening (SBVS) with an active-learning-guided generative design loop. Beginning from?~?3.1 million candidate structures, a BNN provides calibrated activity means and uncertainties that drive upper-confidence-bound acquisition, while a Transformer-based generative model proposes scaffold-diverse analogs optimized for predicted binding affinity, physicochemical constraints, and ADMET priors. Shortlisted compounds undergo consensus docking and triplicate 200-ns molecular dynamics (MD) per complex, followed by free energy decomposition and in silico ADMET profiling. We identify five chemically diverse leads (XS-1-XS-5) with stable binding modes and favorable predicted developability relative to AG-120. Residue-level analyses reveal context-dependent contributions-most notably His132, which exhibits high conditional ΔΔG despite lower contact frequency-supporting targeted SAR hypotheses. Our results demonstrate that coupling uncertainty-aware prioritization with goal-directed generation accelerates the discovery of selective mutant-IDH1 inhibitors while preserving chemical diversity and downstream viability.

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