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Indoleacetate decarboxylase is a glycyl radical enzyme catalysing the formation of malodorant skatole

机译:吲哚乙酸酯脱羧酶是催化恶臭臭臭素形成的糖基自由基酶

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摘要

Skatole is a malodorous compound that contributes to the characteristic smell of animal faeces. Although skatole has long been known to originate from bacterial tryptophan fermentation, the enzyme catalysing its formation has so far remained elusive. Here we report the use of comparative genomics for the discovery of indoleacetate decarboxylase, an O2-sensitive glycyl radical enzyme catalysing the decarboxylation of indoleacetate to form skatole as the terminal step of tryptophan fermentation in certain anaerobic bacteria. We describe its biochemical characterization and compare it to other glycyl radical decarboxylases. Indoleacetate decarboxylase may serve as a genetic marker for the identification of skatole-producing environmental and human-associated bacteria, with impacts on human health and the livestock industry.
机译:Skatole是一种恶臭化合物,有助于动物粪便的特征气味。尽管人们早已知道粪臭素是由细菌色氨酸发酵产生的,但迄今为止,催化其形成的酶仍然难以捉摸。在这里,我们报告了比较基因组学在发现吲哚乙酸酯脱羧酶方面的应用,吲哚乙酸酯脱羧酶是一种O2敏感的甘氨酸自由基酶,可催化吲哚乙酸酯的脱羧形成粪臭素,作为某些厌氧细菌中色氨酸发酵的最终步骤。我们描述其生化特征并将其与其他甘氨酰自由基脱羧酶进行比较。吲哚乙酸酯脱羧酶可以作为遗传标记,用于识别产生粪臭素的环境细菌和与人类相关的细菌,并对人类健康和畜牧业产生影响。

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