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药学学报  2013 

转化次丹参酮二烯酿酒酵母全细胞催化体系的构建

, PP. 1618-1623

Keywords: 丹参,cyp76ah1,酿酒酵母,全细胞催化

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Abstract:

丹参酮是中药丹参的重要活性成分之一,其代谢途径尚未明确。快速筛选和鉴定丹参酮生物合成途径相关基因具有重要意义。铁锈醇作为丹参酮代谢途径中间产物,其产量相对较低,为得到大量铁锈醇用来作为下游p450功能鉴定的底物进行下游途径解析,迫切需要建立高效转化次丹参酮二烯至铁锈醇的体系。本文以酿酒酵母为宿主,构建了含有催化次丹参酮二烯生成铁锈醇的cyp76ah1及p450还原酶smcpr1全细胞催化体系,并在dna及mrna水平对其进行了表征。通过透性剂处理,实现了一步生物转化合成铁锈醇,转化效率达到了69.9%。该研究证实含有cyp76ah1及来源于丹参的细胞色素还原酶smcpr1的酿酒酵母能够将次丹参酮二烯转化为铁锈醇,研究结果不仅为生物转化生产铁锈醇提供了一个有效平台,还可以用于鉴定丹参酮下游合成的其他cyp450的功能。

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