固定化Pseudovibrio-ω-转氨酶催化合成(4S)-四氢萘酮
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1.江苏海洋大学 江苏省海洋药物活性分子筛选重点实验室;2.南京师范大学 食品与制药工程学院

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Q814.2

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江苏省研究生科研与实践创新计划项目(KYCX2022-31)


Synthesis of (4S) -tetrahydronaphthalone catalyzed by the immobilized Pseudovibrio-ω-aminotransferase
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1.Jiangsu Ocean University, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening;2.Nanjing Normal University, School of Food Science and Pharmaceutical Engineering

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    摘要:

    舍曲林是一种重要的选择性5’-羟色胺再摄取抑制剂(SSRI)类抗抑郁药物,已经在全球抑郁症治疗中起到了重要的作用。(4S)-四氢萘酮是合成舍曲林的关键中间体,其供应受限于缺乏操作简单且环境友好的手性拆分路线。假单胞菌ω-转氨酶(Pseudovibrio-ω-Transaminase,P-ω-TA)是一种来源于海绵假单胞菌Pseudovibrio sp. WM33,具有吡哆醛-5’-磷酸(PLP)依赖性的转氨酶,对(4S)-四氢萘酮表现出良好的手性拆分能力,可将(1S,4S)-去甲基舍曲林转化为(4S)-四氢萘酮,但该游离酶在应用时面临酶制备过程复杂、只能单次使用和稳定性差等问题,使用成本高。本研究以T4噬菌体衣壳作为载体,探索了P-ω-TA的自组装固定化及生物催化回收利用。通过将P-ω-TA融合到T4的非必需小外壳蛋白(Soc)上,实现了酶在T4衣壳上的亲和固定,且拷贝数较高。固定化的P-ω-TA保持了完整的活性,可通过离心操作轻松回收并进行重复使用。在五次回收和重复使用过程中,每轮酶活性的平均回收率均大于93%。经验证,固定化P-ω-TA保持了在底物手性中心处的(S)-型选择性拆分以及对(1S,4S)-去甲基舍曲林的催化能力。本研究建立的固定化P-ω-TA方法降低了对(4S)-四氢萘酮手性拆分催化成本,并有助于建立一条更环保的舍曲林合成路线。关键词:假单胞菌ω-转氨酶;T4噬菌体;手性拆分;酶固定化;舍曲林中图分类号:Q814.2 文献标识码: A 文章编号:

    Abstract:

    Sertraline is an important selective serotonin reuptake inhibitor (SSRI)-type of antidepressant that has strongly supported the effort against depression worldwide. (4S)-tetralone is the key intermediate in sertraline synthesis whose supply has been limited by the lack of available chiral resolution routes that are operationally simple and environmentally friendly. The Pseudovibrio-ω-Transaminase (P-ω-TA) is a pyridoxal-5’-phosphate (PLP)-dependent transaminase identified in marine sponge Pseudovibrio sp. WM33 that has shown good chiral resolution of (4S)-tetralone, which can convert (1S,4S) -demethylsertraline to (4S) -tetrahydronaphthalone, but direct application of this enzyme suffers from the high cost caused by the complicated preparation, single-use property and poor stability. In this study, we explored immobilization of P-ω-TA using bacteriophage T4 capsid as the carrier through self-assembly for recoverable biocatalysis. By fusing P-ω-TA to the non-essential small outer capsid protein (Soc) of T4, affinity immobilization of the enzyme on the T4 capsid has been achieved with a high copy number. The immobilized P-ω-TA retains the full activity and can be easily recovered by centrifugation for repeated use. In a five-round recover and reuse process, the average recovery of enzyme activity was >93% for each round. It has been demonstrated that immobilized P-ω-TA maintains the (S) -type selective resolution at the chiral center of the substrate and the catalytic ability for (1S,4S)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydronaphthalen-1-amine; hydrochloride. Immobilization of P-ω-TA reduces the biocatalysis cost on chiral resolution of (4S)-tetralone, and helps establishing a greener synthetic route for sertraline.

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高嵩,邵小芙,果波,李前,王佩,曹阳.固定化Pseudovibrio-ω-转氨酶催化合成(4S)-四氢萘酮[J].精细化工,2024,41(5):

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  • 收稿日期:2023-05-17
  • 最后修改日期:2023-08-05
  • 录用日期:2023-08-07
  • 在线发布日期: 2024-04-29
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