Deep learning discovers halicin, a structurally new broad-spectrum antibiotic
MIT's Collins and Barzilay labs (Cell, Feb 2020) trained a message-passing neural network on ~2,300 molecules. It identified halicin, a diabetes drug candidate, as a potent antibiotic that killed M. tuberculosis, carbapenem-resistant Enterobacteriaceae and pan-resistant A. baumannii, and cleared infections in mice.
Key facts
- Published in Cell on 20 Feb 2020
- Screened >107 million molecules from ZINC15 in silico; of 23 top predictions tested, 8 were antibacterial
- Halicin treated C. difficile and pan-resistant A. baumannii infections in mice
- Structurally distant from known antibiotics; preclinical only
Science result
- Field
- medicine / antibiotic discovery
- Problem
- Finding new antibiotic classes against drug-resistant bacteria
- Result
- Discovery of halicin, a broad-spectrum bactericidal compound unlike existing antibiotics, validated in mice.
- AI system
- Chemprop message-passing neural network
- Human role
- Human-led with AI tools: humans built training data and did all lab validation
- Verification
- Peer-reviewed in Cell; lab-validated in vitro and in mice
- Status
- confirmed
- Why surprising
- The first time deep learning found a new antibiotic from scratch, among molecules that chemists had not considered antibacterial.
What happened
A graph neural network trained on growth-inhibition data screened the Drug Repurposing Hub and then 100M+ molecules, surfacing halicin and other candidates confirmed in the lab.
Why it matters
It launched the modern field of AI antibiotic discovery at a time of stalled antibiotic pipelines.
Changelog
- 2026-09-29: created
Related events
- AI finds abaucin, a narrow-spectrum antibiotic against the superbug Acinetobacter baumannii ★★★
- Generative AI designs new antibiotics that kill drug-resistant gonorrhoea and MRSA ★★★★
- Explainable deep learning discovers a new structural class of antibiotics against MRSA ★★★
Sources (3)
- paperA Deep Learning Approach to Antibiotic Discovery (Cell)
- paperPubMed record
- pressChemistry World: AI tool screens 107 million molecules, discovers potent new antibiotics
id: 2020-02-20-halicin-ai-antibiotic · updated 2026-09-29 · open in the interactive timeline