Volume 134, Issue 1 e202110793
Forschungsartikel
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Unlocking the Stereoselectivity and Substrate Acceptance of Enzymes: Proline-Induced Loop Engineering Test

Dr. Ge Qu

Dr. Ge Qu

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

National Technology Innovation Center of Synthetic Biology, Tianjin, 300308 China

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Yuexin Bi

Yuexin Bi

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

University of Science and Technology of China, Hefei, 230027 China

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Beibei Liu

Beibei Liu

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

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Junkuan Li

Junkuan Li

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072 China

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Xu Han

Xu Han

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

National Technology Innovation Center of Synthetic Biology, Tianjin, 300308 China

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Dr. Weidong Liu

Dr. Weidong Liu

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

National Technology Innovation Center of Synthetic Biology, Tianjin, 300308 China

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Yingying Jiang

Yingying Jiang

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Zongmin Qin

Zongmin Qin

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Prof. Dr. Zhoutong Sun

Corresponding Author

Prof. Dr. Zhoutong Sun

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 China

National Technology Innovation Center of Synthetic Biology, Tianjin, 300308 China

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First published: 17 October 2021
Citations: 3

Abstract

Protein stability and evolvability influence each other. Although protein dynamics play essential roles in various catalytically important properties, their high flexibility and diversity makes it difficult to incorporate such properties into rational engineering. Therefore, how to unlock the potential evolvability in a user-friendly rational design process remains a challenge. In this endeavor, we describe a method for engineering an enantioselective alcohol dehydrogenase. It enables synthetically important substrate acceptance for 4-chlorophenyl pyridine-2-yl ketone, and perfect stereocontrol of both (S)- and (R)-configured products. Thermodynamic analysis unveiled the subtle interaction between enzyme stability and evolvability, while computational studies provided insights into the origin of selectivity and substrate recognition. Preparative-scale synthesis of the (S)-product (73 % yield; >99 % ee) was performed on a gram-scale. This proof-of-principle study demonstrates that interfaced proline residues can be rationally engineered to unlock evolvability and thus provide access to new biocatalysts with highly improved catalytic performance.

Conflict of interest

This work has been included in a patent application by the Tianjin Institute of Industrial Biotechnology.

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