Volume 126, Issue 42 pp. 11497-11501
Zuschrift

An Unusual Dehydratase Acting on Glycerate and a Ketoreducatse Stereoselectively Reducing α-Ketone in Polyketide Starter Unit Biosynthesis

Dr. Hai-Yan He

Dr. Hai-Yan He

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (China)

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Dr. Hua Yuan

Dr. Hua Yuan

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (China)

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Dr. Man-Cheng Tang

Dr. Man-Cheng Tang

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (China)

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Prof. Dr. Gong-Li Tang

Corresponding Author

Prof. Dr. Gong-Li Tang

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (China)

Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237 (China)

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (China)Search for more papers by this author
First published: 27 August 2014
Citations: 2

We thank Prof. Zixin Deng’s Lab at Shanghai JiaoTong University for support in obtaining MS data. This work was financially supported by grants from the 973 Program (2010CB833200) and NNSFC (31200054 and 31330003).

Abstract

Polyketide synthases (PKSs) usually employ a ketoreductase (KR) to catalyze the reduction of a β-keto group, followed by a dehydratase (DH) that drives the dehydration to form a double bond between the α- and β-carbon atoms. Herein, a DH*-KR* involved in FR901464 biosynthesis was characterized: DH* acts on glyceryl-S-acyl carrier protein (ACP) to yield ACP-linked pyruvate; subsequently KR* reduces α-ketone that yields L-lactyl-S-ACP as starter unit for polyketide biosynthesis. Genetic and biochemical evidence was found to support a similar pathway that is involved in the biosynthesis of lankacidins. These results not only identified new PKS domains acting on different substrates, but also provided additional options for engineering the PKS starter pathway or biocatalysis.

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