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Benchmarking AlphaFold‐enabled molecular docking predictions for antibiotic discovery
Open accessAbstract
Efficient identification of drug mechanisms of action remains a challenge. Computational docking approaches have been widely used to predict drug binding targets; yet, such approaches depend on existing protein structures, and accurate structural predictions have only recently become available from AlphaFold2. Here, we combine AlphaFold2 with molecular docking simulations to predict protein‐ligand interactions between 296 proteins spanning Escherichia coli 's essential proteome, and 218 active antibacterial compounds and 100 inactive compounds, respectively, pointing to widespread compound and protein promiscuity. We benchmark model performance by measuring enzymatic activity for 12 essential proteins treated with each antibacterial compound. We confirm extensive promiscuity, but find that the average area under the receiver operating characteristic curve (auROC) is 0.48, indicating weak model performance. We demonstrate that rescoring of docking poses using machine learning‐based approaches improves model performance, resulting in average auROCs as large as 0.63, and that ensembles of rescoring functions improve prediction accuracy and the ratio of true‐positive rate to false‐positive rate. This work indicates that advances in modeling protein‐ligand interactions, particularly using machine learning‐based approaches, are needed to better harness AlphaFold2 for drug discovery.
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“Within the chemoinformatics space, there are advances in computationally modeling how small molecules and proteins interact via docking.157–159”
From Connecting metabolome and phenotype: recent advances in functional metabolomics tools for the identification of bioactive natural products (2024) · cites this paper as [158]
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MethodHighly accurate protein structure prediction with AlphaFold
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“This is consistent with previous assessments of AlphaFold’s fidelity to experimentally determined protein structures (Jumper et al , 2021) and suggests that the weak performance of our model arises from the docking method, and not the quality of protein structures.”
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“As positive controls for our docking simulations, we re-docked 11 experimentally evidenced protein-ligand complexes from the RCSB Protein Data Bank (Dataset EV2).”
MethodInfluentialAutoDock Vina 1.2.0: New Docking Methods, Expanded Force Field, and Python Bindings
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MethodInfluentialThe complete genome sequence of Escherichia coli K-12.
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“As shown in the workflow here, in order to leverage AlphaFold 2 for docking, we first downloaded all 296 AlphaFold 2 -predicted E. coli essential protein structures from the AlphaFold Protein Structure Database (Jumper et al , 2021 ; Varadi et al , 2022 ).”
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“The advent of AlphaFold2 and other deep neural networks for protein folding, such as RoseTTAFold (Baek et al , 2021; Humphreys et al , 2021), has been widely anticipated and celebrated in structural biology.”
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“The results indicated that the binding energies of all components to the targets were less than −5 kcal/mol, suggesting favorable binding stability and affinity (Wong et al. 2022).”
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“Scores below − 7.0 kcal/mol were interpreted as having strong binding affinity, scores between − 5.0 and − 7.0 kcal/mol were considered as moderate binding affinity, and scores above − 4.0 kcal/mol were interpreted as weak or nonspecific interactions (Wong et al., 2022).”
InfluentialBasapuram, G., Duttagupta, S., & Dutta, A. (2026) · World Journal of Microbiology and Biotechnology · doi:10.1007/s11274-026-05239-8
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“Based on the literature, binding energies above − 5 kcal/mol were classified as unfavourable interactions; those ranging from − 5 to − 7 kcal/mol were considered indicative of moderate binding affinity, whereas values ≤ − 7 kcal/mol were interpreted as indicative of strong binding [94,95].”
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“In this context, target-based AI approaches, including structure-guided virtual screening via molecular docking and binding-affinity predictions ( 12 ), offer a promising avenue.”
Self-citationYao, X., Ya, Y., Li, H., & Huang, S. (2026) · Nature Computational Science · doi:10.1038/s43588-026-01062-1
Ramos-Cortes, L. R., Santos-Mena, A. O., Flores-Padilla, L. E., Miranda-Lizárraga, K. P., Cañedo-Figueroa, D. M., Ontiveros-Zúñiga, L. F., Lira-Hernández, F. I., Osuna‐Ramos, J. F., Noriega, S., Cardoso‐Ortiz, J., et al. (2026) · Frontiers in Pharmacology · doi:10.3389/fphar.2026.1940098
“This structure may come from X-ray crystallography, cryo-electron microscopy, nuclear magnetic resonance, homology modeling, or modern protein structure prediction (Wong et al., 2022; Ren et al., 2023).”
Pathak, M. (2026) · European Journal of Medicinal Chemistry · doi:10.1016/j.ejmech.2026.119442 · Cited by 1
Ways to search for novel antibiotics
Volynkina, I. A., Lukianov, D. A., & Владимирович, С. П. (2026) · Russian Journal for Personalized Medicine · doi:10.18705/2782-3806-2026-6-5-364-383
Metadata
- Authors
- Wong, F., Krishnan, A., Zheng, E. J., Stärk, H., Manson, A. L., Earl, A. M., Jaakkola, T., & Collins, J. J.
- Affiliations
- Broad Institute (US)
- MIT Computer Science and Artificial Intelligence Laboratory (US)
- Corresponding author
- Collins, James J
- ORCID
- Venue
- Molecular Systems Biology
- Published
- 2022-09-01
- Volume
- 18
- Issue
- 9
- Pages
- e11081-e11081
- ISSN
- 1744-4292 (ISSN-L)
- PMC
- PMC9446081
- OpenAlex
- W4294719209
- Cited by
- 284
- References
- 52
- Citations by year
- 2026: 61 · 2025: 85 · 2024: 70 · 2023: 60 · 2022: 8
- FWCI
- 30.16
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Molecular Systems Biology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
- Funders
- Broad Institute of MIT and Harvard
- Flu Lab, LLC
- HHS¦NIH¦National Institute of Allergy and Infectious Diseases (U19AI110818, R01‐AI146194)
- HHS¦NIH¦National Institute of General Medical Sciences (P41‐GM103311)
- James S. McDonnell Foundation
- Rosamund Zander and Hansjorg Wyss
- Sea Grape Foundation
- Swiss National Science Foundation (SNSF_ 203071)
- The Audacious Project
- Topics
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Drug Discovery › Computational Drug Discovery Methods
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
- Keywords
- AlphaFold2, molecular docking, protein-ligand interactions, antibiotic discovery, antibacterial agents, machine learning, drug target prediction, benchmarking
- MeSH terms
- Anti-Bacterial Agents, Ligands, Protein Binding, Proteins, Benchmarking, Molecular Docking Simulation
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