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-Structure paper
タイトル | Computational identification of a systemic antibiotic for gram-negative bacteria. |
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ジャーナル・号・ページ | Nat Microbiol, Vol. 7, Issue 10, Page 1661-1672, Year 2022 |
掲載日 | 2022年9月26日 |
著者 | Ryan D Miller / Akira Iinishi / Seyed Majed Modaresi / Byung-Kuk Yoo / Thomas D Curtis / Patrick J Lariviere / Libang Liang / Sangkeun Son / Samantha Nicolau / Rachel Bargabos / Madeleine Morrissette / Michael F Gates / Norman Pitt / Roman P Jakob / Parthasarathi Rath / Timm Maier / Andrey G Malyutin / Jens T Kaiser / Samantha Niles / Blake Karavas / Meghan Ghiglieri / Sarah E J Bowman / Douglas C Rees / Sebastian Hiller / Kim Lewis / |
PubMed 要旨 | Discovery of antibiotics acting against Gram-negative species is uniquely challenging due to their restrictive penetration barrier. BamA, which inserts proteins into the outer membrane, is an ...Discovery of antibiotics acting against Gram-negative species is uniquely challenging due to their restrictive penetration barrier. BamA, which inserts proteins into the outer membrane, is an attractive target due to its surface location. Darobactins produced by Photorhabdus, a nematode gut microbiome symbiont, target BamA. We reasoned that a computational search for genes only distantly related to the darobactin operon may lead to novel compounds. Following this clue, we identified dynobactin A, a novel peptide antibiotic from Photorhabdus australis containing two unlinked rings. Dynobactin is structurally unrelated to darobactins, but also targets BamA. Based on a BamA-dynobactin co-crystal structure and a BAM-complex-dynobactin cryo-EM structure, we show that dynobactin binds to the BamA lateral gate, uniquely protruding into its β-barrel lumen. Dynobactin showed efficacy in a mouse systemic Escherichia coli infection. This study demonstrates the utility of computational approaches to antibiotic discovery and suggests that dynobactin is a promising lead for drug development. |
リンク | Nat Microbiol / PubMed:36163500 / PubMed Central |
手法 | EM (単粒子) / X線回折 / EM (電子線結晶学) |
解像度 | 1.05 - 3.6 Å |
構造データ | EMDB-14242, PDB-7r1w: PDB-7r1v: PDB-7t3h: |
化合物 | ChemComp-HOH: |
由来 |
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キーワード | MEMBRANE PROTEIN / Beta-Barrel / outer membrane / protein insertion / protein folding / protein maturation / antibiotic / natural product / cyclized peptide / antibiotics / drug development / Bam A / MicroED |