Chinese Journal of Catalysis ›› 2025, Vol. 72: 4-23.DOI: 10.1016/S1872-2067(25)64659-6

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Engineering metalloenzymes for new-to-nature carbene and nitrene transfer biocatalysis

Wenjin Pana,1, Xinlong Fana,1, Wantong Jiangb, Sirui Xinc, Ningzhi Wangd, Qian Wange, Keyang Yua, Xinkun Rena,*()   

  1. aCollege of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210023, Jiangsu, China
    bSchool of Life Sciences, Nanjing University, Nanjing 210023, Jiangsu, China
    cSchool of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China
    dKuang Yaming Honors School, Nanjing University, Nanjing 210023, Jiangsu, China
    eSchool of Environment, Nanjing University, Nanjing 210023, Jiangsu, China
  • Received:2024-11-05 Accepted:2025-01-14 Online:2025-05-18 Published:2025-05-20
  • Contact: *E-mail: xinkunren@nju.edu.cn (X. Ren).
  • About author:Xinkun Ren (College of Engineering and Applied Sciences, Nanjing University) received his B.A. degree from Kuang Yaming Honors School, Nanjing University (P. R. China) in 2012, and Ph.D. degree from University of Oxford (United Kingdom) in 2018. He carried out his Postdoctoral research at University of Rochester from 2018 to the end of 2021. Since then, he has been working in College of Engineering of Applied Sciences (P. R. China). He is a recipient of the National Natural Science Foundation's Overseas Outstanding Youth Program (2022) and Distinguished Young Scholar of Natural Science Foundation of Jiangsu Province (2023). His current research focuses on new synthetic strategies, mechanisms, and applications of biocatalysts, aiming to overcome the limitations of natural evolution. He has published more than 20 peer-reviewed papers and served as primary inventor in filling over 40 invention patents.
    First author contact:1These authors contributed equally.
  • Supported by:
    Natural Science Foundation of Jiangsu Province(BK20232017);Science Fund for Distinguished Young Scholars of Jiangsu Province(BK20230022)

Abstract:

Biocatalysis, which involves using enzymes to address synthetic challenges of significance to humans, has rapidly developed into a pivotal technology for chemical innovation. Over the past decade, there has been a notable increase in the use of metalloproteins as catalysts for abiotic, synthetically valuable carbene and nitrene transfer reactions. This trend highlights the adaptability of protein-based catalysts and our growing ability to harness this potential for novel enzyme chemistry. This review focuses on the most recent advancements in metalloenzyme-catalyzed carbene and nitrene transfer reactions, including cyclopropanation, carbene Y-H and C-H insertions, Doyle-Kirmse reactions, aldehyde olefinations, nitrene azide-to-aldehyde conversions, and nitrene C-H insertion. A variety of protein scaffolds have been engineered to offer varied levels of reactivity and selectivity towards pharmaceutically relevant compounds. The application of these new catalysts in preparative-scale synthesis underscores their emerging biotechnological significance. Furthermore, insights into key intermediate and determining factors in stereochemistry are offering valuable guidance for engineering metalloproteins, thereby expanding the scope and utility of these non-natural activities.

Key words: Metalloenzyme, Biocatalysis, Carbene, Nitrene, Non-natural reaction