Deracemization and Stereoinversion to Aromatic d-Amino Acid Derivatives with Ancestral l-Amino Acid Oxidase,ACS Catalysis

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Deracemization and Stereoinversion to Aromatic d-Amino Acid Derivatives with Ancestral l-Amino Acid Oxidase
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-10-11 , DOI: 10.1021/acscatal.9b03418
Shogo Nakano ₁ , Yuki Minamino ₁ , Fumihito Hasebe ₁ , Sohei Ito ₁

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Enantiomerically pure amino acid derivatives could be foundational compounds for peptide drugs. Deracemization of racemates to l-amino acid derivatives can be achieved through the reaction of evolved d-amino acid oxidase and chemical reductants, whereas deracemization to d-amino acid derivatives has not progressed due to the difficulty associated with the heterologous expression of l-amino acid oxidase (LAAO). In this study, we succeeded in developing an ancestral LAAO (AncLAAO) bearing broad substrate selectivity (13 l-amino acids) and high productivity through an Escherichia coli expression system (∼50.7 mg/L). AncLAAO can be applied to perform deracemization to d-amino acids in a similar way to deracemization to l-amino acids. In fact, full conversion (>99% ee, d-form) could be achieved for 16 racemates, including nine d,l-Phe derivatives, six d,l-Trp derivatives, and a d,l-phenylglycine. Taken together, we believe that AncLAAO could be a key enzyme to obtain optically pure d-amino acid derivatives in the future.

中文翻译：

用祖先l-氨基酸氧化酶进行脱硝和立体转化为芳香族d-氨基酸衍生物

对映体纯的氨基酸衍生物可能是肽类药物的基础化合物。外消旋物对1-氨基酸衍生物的脱硫可以通过进化出的d-氨基酸氧化酶和化学还原剂的反应来实现，而对d-氨基酸衍生物的脱硫则由于与1-氨基酸的异源表达有关的困难而没有进行。酸性氧化酶（LAAO）。在这项研究中，我们通过大肠杆菌表达系统（〜50.7 mg / L）成功开发了具有广泛的底物选择性（13 l-氨基酸）和高生产率的祖先LAAO（AncLAAO ）。AncLAAO可以应用于对d进行除权-氨基酸以类似于消旋为1-氨基酸的方式。实际上，对于16个外消旋体可以实现完全转化（＞ 99％ee，d-形式），包括九个d，1- Phe衍生物，六个d，1- Trp衍生物和d，1-苯基甘氨酸。综上所述，我们认为，AncLAAO可能是将来获得光学纯的d-氨基酸衍生物的关键酶。

更新日期：2019-10-12

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