Mining elements of siderophore chirality encoded in microbial genomes

Mining elements of siderophore chirality encoded in microbial genomes
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挖掘微生物基因组中编码的铁载体手性元素

DOI:
10.1002/1873-3468.14539
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发表时间:
2023
期刊:
影响因子:
3.5
通讯作者:
Thomsen, Emil
Thomsen, Emil
中科院分区:
生物学3区
文献类型:
--
作者:
Butler, Alison;Jelowicki, Aneta M.;Ogasawara, Haley A.;Reitz, Zachary L.;Stow, Parker R.;Thomsen, Emil

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绝大多数细菌的生长都需要铁元素。铁载体是一种重要的铁获取策略,它是合成用于隔离铁的次级微生物代谢物(III)。铁载体结构包括多种形式,其中高度修饰的肽型铁载体是本文感兴趣的。最先进的基因组挖掘工具,如antiSMASH(抗生素和次级代谢物分析SHell),具有预测和发现新的肽性铁载体的潜力,包括一组组合在一般类别(DHB‐1 /dCAA‐lSer)3(CAA,阳离子氨基酸)三丝氨酸酯骨架上的三儿茶酚铁载体。在细菌基因组中预测到含1 /dArg、1 / dlyys和lorn的铁载体,但不含dorn。幸运的是,dorn铁载体被发现了,但它缺乏预测,这突出了当前基因组挖掘工具的局限性。这些铁载体的完整组合组合,形成手性铁(III)配合物,揭示了微生物基因组中编码的立体特异性配位化学。这组铁(III) -铁载体中的手性引发了一个问题,即相关的铁载体介导的铁获取途径是否具有立体特异性和选择性。
The vast majority of bacteria require iron to grow. A significant iron acquisition strategy is the production of siderophores, which are secondary microbial metabolites synthesized to sequester iron(III). Siderophore structures encompass a variety of forms, of which highly modified peptidic siderophores are of interest herein. State‐of‐the‐art genome mining tools, such as antiSMASH (antibiotics & Secondary Metabolite Analysis SHell), hold the potential to predict and discover new peptidic siderophores, including a combinatoric suite of triscatechol siderophores framed on a triserine‐ester backbone of the general class, (DHB‐l/dCAA‐lSer)3(CAA, cationic amino acid). Siderophores withl/dArg,l/dLys andlOrn, but notdOrn, were predicted in bacterial genomes. Fortuitously thedOrn siderophore was identified, yet its lack of prediction highlights the limitation of current genome mining tools. The full combinatoric suite of these siderophores, which form chiral iron(III) complexes, reveals stereospecific coordination chemistry encoded in microbial genomes. The chirality embedded in this suite of Fe(III)‐siderophores raises the question of whether the relevant siderophore‐mediated iron acquisition pathways are stereospecific and selective for ferric siderophore complexes of a defined configuration.
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