A stereoselective vanadium-dependent chloroperoxidase in bacterial antibiotic biosynthesis.

A stereoselective vanadium-dependent chloroperoxidase in bacterial antibiotic biosynthesis.
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DOI:
10.1021/ja201088k
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发表时间:
2011-03-30
影响因子:
15
通讯作者:
Moore, Bradley S.
Moore, Bradley S.
中科院分区:
化学1区
文献类型:
--
作者:
Bernhardt, Peter;Okino, Tatsufumi;Winter, Jaclyn M.;Miyanaga, Akimasa;Moore, Bradley S.

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卤素酶催化将卤素原子引入富电子有机分子的反应。钒依赖的卤素过氧化物酶通常被认为是混杂的卤化酶,迄今为止仅来自真核生物,其细胞功能经常受到争议。本文首次报道了来自Streptomyces sp. CNQ-525的细菌钒依赖氯过氧化物酶(NapH1)的生化特性,该酶在napyradiomycin抗生素的生物合成中催化高度立体选择性的氯化环化反应。这一发现将氯过氧化物钒酶与微生物天然产物的生物合成联系起来。
Halogenases catalyze reactions that introduce halogen atoms into electron-rich organic molecules. Vanadium-dependent haloperoxidases are generally considered to be promiscuous halogenating enzymes that have thus far been derived exclusively from eukaryotes, where their cellular function is often disputed. We now report the first biochemical characterization of a bacterial vanadium-dependent chloroperoxidase, NapH1 from Streptomyces sp. CNQ-525, which catalyzes a highly stereoselective chlorination-cyclization reaction in napyradiomycin antibiotic biosynthesis. This finding biochemically links a vanadium chloroperoxidase to microbial natural product biosynthesis.
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