2026-05-13 スイス連邦工科大学ローザンヌ校（EPFL）
A simulated protein backbone (yellow) augmented with AI-generated snapshots from the LD-FPG, representing side chain positions and dynamic movements. 2025 LPCS LTS2 EPFL CC BY SA
＜関連情報＞
- https://actu.epfl.ch/news/ai-generates-first-complete-models-of-proteins-i-3/
- https://papers.nips.cc/paper_files/paper/2025/hash/23be5bb3a432d3ccfe991562897ebf02-Abstract-Conference.html
グラフ埋め込みにおける潜在拡散を用いた全原子タンパク質構造の生成モデリング Generative Modeling of Full-Atom Protein Conformations using Latent Diffusion on Graph Embeddings
Aditya Sengar, Ali Hariri, Daniel Probst, PATRICK BARTH, Pierre Vandergheynst
NeurIPS Proceedings Published:2025
Abstract
Generating diverse, all‐atom conformational ensembles of dynamic proteins such as G‐protein‐coupled receptors (GPCRs) is critical for understanding their function, yet most generative models simplify atomic detail or ignore conformational diversity altogether. We present latent diffusion for full protein generation (LD-FPG), a framework that constructs complete all‐atom protein structures, including every side‐chain heavy atom, directly from molecular dynamics (MD) trajectories. LD-FPG employs a Chebyshev graph neural network (ChebNet) to obtain low‐dimensional latent embeddings of protein conformations, which are processed using three pooling strategies: blind, sequential and residue‐based. A diffusion model trained on these latent representations generates new samples that a decoder, optionally regularized by dihedral‐angle losses, maps back to Cartesian coordinates. Using D2R-MD, a 2μs MD trajectory (12 000 frames) of the human dopamine D2 receptor in a membrane environment, the sequential and residue-based pooling strategies reproduce the reference ensemble with high structural fidelity (all‐atom lDDT¥∼ 0.7; Cα-lDDT ¥∼ 0.8) and recovers backbone and side‐chain dihedral‐angle distributions with a Jensen–Shannon divergence <0.03 compared to the MD data. LD-FPG thereby offers a practical route to system‐specific, all‐atom ensemble generation for large proteins, providing a promising tool for structure‐based therapeutic design on complex, dynamic targets. The D2R-MD dataset and our implementation are freely available to facilitate further research.
