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Advances in the bioconversion mechanism of lovastatin to wuxistatin by Amycolatopsis sp. CGMCC 1149

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Abstract

Wuxistatin, a novel statin and more potent than lovastatin, was converted from lovastatin by Amycolatopsis sp. (CGMCC 1149). Product I, an intermediate product, was found in the fermentation broth, and the structure analysis showed that product I had an additional hydroxyl group at the methyl group attached to C3 compared to lovastatin, which indicates that product I is one isomer of wuxistatin. Isotope tracing experiment proved that hydroxyl group of wuxistatin was provided by product I and the reaction from product I to wuxistatin was an intramolecular transfer. Hydroxylation reaction established in a cell-free system could be inhibited by CO and enhanced by ATP, Fe2+, and ascorbic acid, which were consistent with the presumption that the hydroxylase was an induced cytochrome P450. Study on proteomics of Amycolatopsis sp. CGMCC 1149 suggested that three identified proteins, including integral membrane protein, Fe-S oxidoreductase, and GTP-binding protein YchF, were induced by lovastatin and required during hydroxylation reaction. In conclusion, bioconversion mechanism of wuxistatin by Amycolatopsis sp. CGMCC 1149 was proposed: lovastatin is firstly hydroxylated to product I by a hydroxylase, namely cytochrome P450, and then product I is rearranged to wuxistatin by isomerases.

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Acknowledgments

This work is a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions. We thank associate professor Jian Song (School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China) for the assistance in the analysis of chemical structures in the manuscript.

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Authors and Affiliations

  1. The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China

    Hong Zong, Bin Zhuge, Huiying Fang, Yanhui Cao, Lin Mu, Weilai Fu & Jian Zhuge

  2. School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China

    Jian Song

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  1. Hong Zong
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  2. Bin Zhuge
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  3. Huiying Fang
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  4. Yanhui Cao
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  5. Lin Mu
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  7. Jian Song
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  8. Jian Zhuge
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Correspondence to Bin Zhuge.

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Zong, H., Zhuge, B., Fang, H. et al. Advances in the bioconversion mechanism of lovastatin to wuxistatin by Amycolatopsis sp. CGMCC 1149. Appl Microbiol Biotechnol 97, 599–609 (2013). https://doi.org/10.1007/s00253-012-4341-4

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  • DOI: https://doi.org/10.1007/s00253-012-4341-4

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