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Generative Coarse-Graining of Molecular Conformations
Wujie Wang · Minkai Xu · Chen Cai · Benjamin Kurt Miller · Tess Smidt · Yusu Wang · Jian Tang · Rafael Gomez-Bombarelli

Wed Jul 20 10:30 AM -- 10:35 AM (PDT) @ Hall F

Coarse-graining (CG) of molecular simulations simplifies the particle representation by grouping selected atoms into pseudo-beads and therefore drastically accelerates simulation. However, such CG procedure induces information losses, which makes accurate backmapping, i.e., restoring fine-grained (FG) coordinates from CG coordinates, a long-standing challenge. Inspired by the recent progress in generative models and equivariant networks, we propose a novel model that rigorously embeds the vital probabilistic nature and geometrical consistency requirements of the backmapping transformation. Our model encodes the FG uncertainties into an invariant latent space and decodes them back to FG geometries via equivariant convolutions. To standardize the evaluation of this domain, we further provide three comprehensive benchmarks based on molecular dynamics trajectories. Extensive experiments show that our approach always recovers more realistic structures and outperforms existing data-driven methods with a significant margin.

Author Information

Wujie Wang (Massachusetts Institute of Technology)
Minkai Xu (University of Montreal)
Chen Cai (University of California, San Diego)
Benjamin Kurt Miller (University of Amsterdam)
Tess Smidt (Massachusetts Institute of Technology)
Yusu Wang (UC San Diego)
Jian Tang (Mila)
Rafael Gomez-Bombarelli (MIT)

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