Volume 57, Issue 48 pp. 15887-15890
Communication

A Clade II-D Fungal Chimeric Diterpene Synthase from Colletotrichum gloeosporioides Produces Dolasta-1(15),8-diene

Dr. Guangkai Bian

Dr. Guangkai Bian

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

These authors contributed equally to this work.

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Jan Rinkel

Jan Rinkel

Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany

These authors contributed equally to this work.

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Dr. Zhangqian Wang

Dr. Zhangqian Wang

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

These authors contributed equally to this work.

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Lukas Lauterbach

Lukas Lauterbach

Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany

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Dr. Anwei Hou

Dr. Anwei Hou

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

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Yujie Yuan

Yujie Yuan

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

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Prof. Zixin Deng

Prof. Zixin Deng

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

Hubei Engineering Laboratory for Synthetic Microbiology, Wuhan Institute of Biotechnology, Wuhan, 430075 China

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Prof. Tiangang Liu

Corresponding Author

Prof. Tiangang Liu

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071 China

Hubei Engineering Laboratory for Synthetic Microbiology, Wuhan Institute of Biotechnology, Wuhan, 430075 China

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Prof. Dr. Jeroen S. Dickschat

Corresponding Author

Prof. Dr. Jeroen S. Dickschat

Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany

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First published: 02 October 2018
Citations: 69

Graphical Abstract

The missing link: Fungal chimeric diterpene synthases with prenyltransferase and terpene synthase domains fall into two clades (I+II) with six subclades (A–F). The present study reports the characterization of the first clade II-D enzyme, the structures of its products, and the cyclization mechanism. The observed 12R configuration reveals a uniform stereochemistry at this carbon for all clade II enzyme products.

Abstract

Based on a terpenoid overproduction platform in yeast for genome mining, a chimeric diterpene synthase from the endophytic fungus Colletotrichum gloeosporioides ES026 was characterized as the (5R,12R,14S)-dolasta-1(15),8-diene synthase. The absolute configuration was independently verified through the use of enantioselectively deuterated terpene precursors, which unequivocally established the predicted C1-III-IV cyclization mode for this first characterized clade II-D enzyme. Extensive isotopic labeling experiments and isolation of the intermediate (1R)-δ-araneosene supported the proposed cyclization mechanism.

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