Chemical synthesis of the lantibiotic lacticin 481 reveals the importance of lanthionine stereochemistry.

Chemical synthesis of the lantibiotic lacticin 481 reveals the importance of lanthionine stereochemistry.
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DOI:
10.1021/ja4014024
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发表时间:
2013-05-15
影响因子:
15
通讯作者:
van der Donk, Wilfred A.
van der Donk, Wilfred A.
中科院分区:
化学1区
文献类型:
--
作者:
Knerr, Patrick J.;van der Donk, Wilfred A.

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lantir是一类抗菌肽天然产物,其特征是含有硫醚的氨基酸衣硫氨酸和甲基衣硫氨酸的翻译后安装。直到最近,人们才知道这些交联中的每一种都只有一种自然形成的立体化学构型。具有替代硫代氨酸和甲基硫代氨酸立体化学的l抗生素的发现促使人们对其生物活性的重要性进行了研究。在这里,固体支撑的化学合成使lantibiotic lacticin 481和含有非天然立体构型交联的类似物的全合成成为可能。生物学评价显示,这些改变消除了所有类似物的抗菌活性,揭示了酶安装立体化学对乳酸素481的生物活性至关重要。
Lantibiotics are a family of antibacterial peptide natural products characterized by the post-translational installation of the thioether-containing amino acids lanthionine and methyllanthionine. Until recently, only a single naturally occurring stereochemical configuration for each of these cross-links was known. The discovery of lantibiotics with alternative lanthionine and methyllanthionine stereochemistry has prompted an investigation of its importance to biological activity. Here, solid-supported chemical synthesis enabled the total synthesis of the lantibiotic lacticin 481 and analogues containing cross-links with non-native stereochemical configurations. Biological evaluation revealed that these alterations abolished the antibacterial activity in all of the analogues, revealing the critical importance of the enzymatically installed stereochemistry for the biological activity of lacticin 481.
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