Food-Poisoning Bacteria Employ a Citrate Synthase and a Type II NRPS To Synthesize Bolaamphiphilic Lipopeptide Antibiotics*.

Food-Poisoning Bacteria Employ a Citrate Synthase and a Type II NRPS To Synthesize Bolaamphiphilic Lipopeptide Antibiotics*.
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DOI:
10.1002/anie.202009107
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发表时间:
2020-11-23
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Hertweck C
Hertweck C
中科院分区:
其他
文献类型:
--
作者:
Dose B;Ross C;Niehs SP;Scherlach K;Bauer JP;Hertweck C

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Mining the genome of the food‐spoiling bacterium Burkholderia gladioli pv. cocovenenans revealed five nonribosomal peptide synthetase (NRPS) gene clusters, including an orphan gene locus (bol). Gene inactivation and metabolic profiling linked the bol gene cluster to novel bolaamphiphilic lipopeptides with antimycobacterial activity. A combination of chemical analysis and bioinformatics elucidated the structures of bolagladin A and B, lipocyclopeptides featuring an unusual dehydro‐β‐alanine enamide linker fused to an unprecedented tricarboxylic fatty acid tail. Through a series of targeted gene deletions, we proved the involvement of a designated citrate synthase (CS), priming ketosynthases III (KS III), a type II NRPS, including a novel desaturase for enamide formation, and a multimodular NRPS in generating the cyclopeptide. Network analyses revealed the evolutionary origin of the CS and identified cryptic CS/NRPS gene loci in various bacterial genomes. When life gives you citrate… Genome mining of food‐spoiling bacteria revealed unprecedented lipocyclopeptides (bolagladins) with antimycobacterial activity. A specialized citrate synthase and nonribosomal peptide synthetases (NRPSs) play key roles in the formation and loading of their unusual tricarboxylic fatty acid tail, thus generating a bolaamphiphilic natural product (see scheme).
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