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-Structure paper
| タイトル | De novo design of potent inhibitors of clostridial family toxins. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 122, Issue 39, Page e2509329122, Year 2025 |
| 掲載日 | 2025年9月30日 |
著者 | Robert J Ragotte / Huazhu Liang / John Tam / Sean Miletic / Jacob M Berman / Roger Palou / Connor Weidle / Zhijie Li / Matthias Glögl / Greg L Beilhartz / Kenneth D Carr / Andrew J Borst / Brian Coventry / Xinru Wang / John L Rubinstein / Mike Tyers / Daniel Schramek / Roman A Melnyk / David Baker / ![]() |
| PubMed 要旨 | remains a leading cause of hospital-acquired infections, with its primary virulence factor, toxin B (TcdB), responsible for severe colitis and recurrent disease. The closely related toxin, TcsL, ... remains a leading cause of hospital-acquired infections, with its primary virulence factor, toxin B (TcdB), responsible for severe colitis and recurrent disease. The closely related toxin, TcsL, from , causes a rarer but often fatal toxic shock syndrome, particularly in gynecological and obstetric contexts. We report the de novo design of small protein minibinders that directly neutralize TcdB and TcsL by preventing their entry into host cells. Using deep learning and Rosetta-based approaches, we generated high-affinity minibinders that protect cells from intoxication with picomolar potency and, in the case of TcsL, prolonged survival following lethal toxin challenge in mice. The designed proteins against TcdB demonstrate exceptional stability in proteolytic and acidic environments, making them well-suited for oral delivery-a valuable feature for treating infections localized to the gastrointestinal tract. For TcsL, potent inhibitors were identified from 48 initial designs and 48 optimized designs, highlighting the potential of computational design for rapidly developing countermeasures against life-threatening bacterial toxins. |
リンク | Proc Natl Acad Sci U S A / PubMed:40982695 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.02 - 4.61 Å |
| 構造データ | EMDB-45739, PDB-9cm5: EMDB-48223, PDB-9mf4: |
| 由来 |
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キーワード | TOXIN / TcdB / Clostridium difficile / C. Diff. / fzd48 / De Novo Minibinder / minibinder / de novo / inhibitor |
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