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通过Corynebacterium glutamicum使用异质芳香碳素酸减少酶生产香
Miku Matsuzawa1, Junko Ito1, Keiko Danjo1
1Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc, Kawasaki, Kanagawa, 210-8681, Japan.
这项研究对Corynebacterium glutamicum进行了素生产的工程设计,使用Gordonia effusa芳香碳酸减少酶 (ACAR) 达到创纪录的22g/L. 来自其他物种的新型ACAR显示出对高效,副产品减少的香草素合成的希望.
科学领域:
- 生物技术是生物技术.
- 微生物工程 微生物工程
- 合成生物学 合成生物学
背景情况:
- 香是一种关键的调味剂,是通过使用葡萄糖进行生物转化以实现可持续生产的目标.
- 这项研究的重点是最后的生物转化步骤:将香草酸转化为香草素.
- 选择Corynebacterium glutamicum作为微生物宿主是由于其固有的抗林耐药性.
研究的目的:
- 识别和描述能够有效地将香酸转化为香素的芳香碳酸减少酶 (ACAR).
- 通过优化生物转化途径,设计一种强大的C. glutamicum菌株,用于高产量的香草生产.
- 评估各种ACARs在商业规模瓦尼林合成方面的潜力.
主要方法:
- 在C. glutamicum中删除瓦尼林降解基因 (芳香性 aldehyde降解酶和vanAB).
- 从各种生物体中引入和表达十七个ACAR同类物质到工程化C. glutamicum中.
- 在体内转换试验以评估工程菌株的香草产量.
主要成果:
- 已经引入的8个ACARs成功表达并证明了素的生产.
- 来自Gordonia effusa,Coccomyxa subellipsoidea和Novosphingobium malaysiense的ACARs表现出显著的转化活性和基质特异性.
- 经过工程改造的C. glutamicum菌株与Gordonia effusa ACAR取得了22g/L的香草度.
结论:
- 使用C. glutamicum与Gordonia effusa ACAR.进行工程设计,创下了素积累的新纪录 (22 g/L).
- 来自Novosphingobium malaysiense和Coccomyxa subellipsoidea的ACAR被确定为高度基质特异性的,有助于减少副产品.
- 这些发现为开发高效和可持续的工业规模素生物生产方法提供了基础.
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