PreprintCited by 31Computational Drug Discovery MethodsMachine Learning in Materials ScienceSynthesis and Characterization of Heterocyclic Compounds

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DiffDec: Structure-Aware Scaffold Decoration with an End-to-End Diffusion Model

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Xie, Junjie, Chen, Sheng, Lei, Jinping, Yang, Yuedong·2023·Journal of Chemical Information and Modeling

Preprint — published as 10.1021/acs.jcim.3c01466 · Paper page

Abstract

In molecular optimization, one popular way is R-groups decoration on molecular scaffolds, and many efforts have been put to generate R-groups based on deep generative models. However, these methods mostly use information of known binding ligands, without fully utilizing target structure information. In this study, we proposed a new method, DiffDec, to involve three-dimensional pocket constraints by a modified diffusion technique for optimizing molecules through molecular scaffold decoration. For an end-to-end generation of R-groups with different sizes, we designed a novel fake atom mechanism. DiffDec was shown able to generate structure-aware R-groups, and simultaneously generate multiple R-groups for one scaffold on different growth anchors. The growth anchors could be provided by users or automatically determined by our model. DiffDec achieved R-group recovery rates of 69.67% and 45.34% in the single and multiple R-group decoration tasks, respectively, and these values were significantly higher than competing methods (37.33% and 26.85%). According to the molecular docking study, our decorated molecules obtained better average binding affinity than baseline methods. The docking pose analysis revealed that DiffDec could decorate scaffolds with R-groups that exhibited improved binding affinities and more favourable interactions with the pocket. These results demonstrated the potential and applicability of DiffDec in real-world scaffold decoration for molecular optimization.

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Metadata

Authors
Xie, J., Chen, S., Lei, J., & Yang, Y.
Affiliations
Sun Yat-sen University (CN)
Corresponding author
  • Lei, Jinping
  • Yang, Yuedong
Venue
Journal of Chemical Information and Modeling
Publisher
openRxiv
Published
2023-10-10
Volume
64
Issue
7
Pages
2554-2564
ISSN
1549-9596 (ISSN-L)
OpenAlex
W4391187294
Cited by
31
References
1
Citations by year
2026: 13 · 2025: 11 · 2024: 7
FWCI
6.56
Type
journal article
Language
en
Open access
Locations
  • Journal of Chemical Information and Modeling (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed (publishedVersion)
  • Griffith Research Online (submittedVersion, other-oa)
Funders
  • National Natural Science Foundation of China (2020YFB0204803, 82003651)
  • National Key Research and Development Program of China (2023YFF1204900)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Drug Discovery › Computational Drug Discovery Methods
  • Physical Sciences › Materials Science › Materials Chemistry › Machine Learning in Materials Science
  • Physical Sciences › Chemistry › Organic Chemistry › Synthesis and Characterization of Heterocyclic Compounds
Keywords
diffusion models, binding affinity, molecular docking, molecular optimization
MeSH terms
Quantitative Structure-Activity Relationship, Molecular Docking Simulation

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