{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2020-02-20-halicin-ai-antibiotic/","md":"https://postcutoff.com/e/2020-02-20-halicin-ai-antibiotic/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2020-02-20-halicin-ai-antibiotic","date":"2020-02-20","date_precision":"day","short_title":"Deep learning discovers halicin, a structurally new broad-spectrum antibiotic","deck":null,"takeaway":"MIT's Collins and Barzilay labs (Cell, Feb 2020) trained a message-passing neural network on ~2,300 molecules.","category":"science","category_label":"Science & math","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":[{"n":1,"title":"A Deep Learning Approach to Antibiotic Discovery (Cell)","url":"https://www.cell.com/cell/fulltext/S0092-8674(20)30102-1","type":"paper","group":"primary","domain":"cell.com"},{"n":2,"title":"PubMed record","url":"https://pubmed.ncbi.nlm.nih.gov/32084340/","type":"paper","group":"primary","domain":"pubmed.ncbi.nlm.nih.gov"},{"n":3,"title":"Chemistry World: AI tool screens 107 million molecules, discovers potent new antibiotics","url":"https://www.chemistryworld.com/news/ai-tool-screens-107-million-molecules-discovers-potent-new-antibiotics/4011233.article","type":"press","group":"press","domain":"chemistryworld.com"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["MIT","Broad Institute"],"title":"Deep learning discovers halicin, a structurally new broad-spectrum antibiotic","summary":"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"],"key_numbers":[],"tags":["biology","antibiotics","drug-discovery","graph-neural-networks"],"science":{"field":"medicine","subfield":"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.","open_since":"","ai_system":["Chemprop message-passing neural network"],"human_role":"Human-led with AI tools: humans built training data and did all lab validation","verification":{"key":"peer-review","label":"Peer-reviewed","text":"Peer-reviewed in Cell; lab-validated in vitro and in mice"},"status":"confirmed","shock":"The first time deep learning found a new antibiotic from scratch, among molecules that chemists had not considered antibacterial."},"body_md":"## What happened\n\nA 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.\n\n## Why it matters\n\nIt launched the modern field of AI antibiotic discovery at a time of stalled antibiotic pipelines.","disputed":[],"related":[{"id":"2025-08-14-mit-generative-ai-antibiotics","url":"https://postcutoff.com/e/2025-08-14-mit-generative-ai-antibiotics/","date":"2025-08-14","date_precision":"day","short_title":"Generative AI designs new antibiotics that kill drug-resistant gonorrhoea and MRSA","deck":null,"takeaway":"It showed generative AI exploring chemical space beyond existing compound libraries for one of medicine's most urgent needs.","category":"science","category_label":"Science & math","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":2,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["MIT"]},{"id":"2023-05-25-abaucin-ai-antibiotic","url":"https://postcutoff.com/e/2023-05-25-abaucin-ai-antibiotic/","date":"2023-05-25","date_precision":"day","short_title":"AI finds abaucin, a narrow-spectrum antibiotic against the superbug Acinetobacter baumannii","deck":null,"takeaway":"It showed that AI could find narrow-spectrum antibiotics, which spare the microbiome and slow resistance.","category":"science","category_label":"Science & math","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":2,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["McMaster University","MIT"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/deep-learning-discovers-halicin"}