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Old yellow enzymes: structures and structure-guided engineering for stereocomplementary bioreduction

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Abstract

Since the first discovery of old yellow enzyme 1 (OYE1) from Saccharomyces pastorianus in 1932, biocatalytic asymmetric reduction of activated alkenes by OYEs has become a valuable reaction in organic synthesis. To access stereocomplementary C=C-bond bioreduction, the mining of novel OYEs and especially the protein engineering of existing OYEs have been performed, which successfully achieved the stereocomplementary reduction in several cases and further raise the potential of applications. In this review, we analyzed the structures, active sites, and substrate recognition of OYEs, which are the bases for their substrate specificity and stereospecificity. Sequence similarity network of OYEs superfamily was also constructed to investigate the scope of characterized OYEs. The structure-guided engineering to switch the stereoselectivity of OYEs and thus access stereocomplementary bioreduction over the last decade (2009–2020) was then reviewed and discussed, which might give new insights into the mining and engineering of related biocatalysts.

Key points

The sequence similarity network of OYEs superfamily was constructed and annotated.

The structures and active sites of OYEs from different classes were compared.

“Left/right” binding mode was used to explain the stereopreferences of OYEs.

Structure-guided engineering of OYEs to switch their stereoselectivity was reviewed.

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Funding

This work was financially supported by the National Natural Science Foundation of China (31971207, 81602993), LiaoNing Revitalization Talents Program (XLYC1907153), and Young Elite Scientists Sponsorship Program by CAST (2016QNRC001).

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Authors

Contributions

QS, HW, and JL conducted structural comparison and summarized the stereo-switch of OYEs. SL, JG, and HL conducted phylogenetic analysis and sequence similarity network of OYEs. XJ, HH, ZZ, and SY contributed ideas for literature analysis. BQ contributed ideas for literature analysis and wrote the manuscript. All the authors read and approved the manuscript.

Corresponding authors

Correspondence to Hua Huo, Zhendong Zheng, Song You or Bin Qin.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Shi, Q., Wang, H., Liu, J. et al. Old yellow enzymes: structures and structure-guided engineering for stereocomplementary bioreduction. Appl Microbiol Biotechnol 104, 8155–8170 (2020). https://doi.org/10.1007/s00253-020-10845-z

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  • DOI: https://doi.org/10.1007/s00253-020-10845-z

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