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Li DS, Shi LL, Guo K, Luo SH, Liu YC, Chen YG, Liu Y, Li SH. A new sesquiterpene synthase catalyzing the formation of (R)-β-bisabolene from medicinal plant Colquhounia coccinea var. mollis and its anti-adipogenic and antibacterial activities. Phytochemistry 2023; 211:113681. [PMID: 37080413 DOI: 10.1016/j.phytochem.2023.113681] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/24/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
The sesquiterpene β-bisabolene possessing R and S configurations is commonly found in plant essential oils with antimicrobial and antioxidant activities. Here, we report the cloning and functional characterization of a (R)-β-bisabolene synthase gene (CcTPS2) from a Lamiaceae medicinal plant Colquhounia coccinea var. mollis. The biochemical function of CcTPS2 catalyzing the cyclization of farnesyl diphosphate to form a single product (R)-β-bisabolene was characterized through an engineered Escherichia coli producing diverse polyprenyl diphosphate precursors and in vitro enzyme assay, indicating that CcTPS2 was a high-fidelity (R)-β-bisabolene synthase. The production of (R)-β-bisabolene in an engineered E. coli strain harboring the exogenous mevalonate pathway, farnesyl diphosphate synthase and CcTPS1 genes was 17 mg/L under shaking flask conditions. Ultimately, 120 mg of purified (R)-β-bisabolene was obtained from the engineered E. coli, and its structure was elucidated by detailed spectroscopic analyses (including 1D and 2D NMR, and specific rotation). Four chimeric enzymes were constructed through domain swapping, which altered the product outcome, indicating the region important for substrate and product specificity. In addition, (R)-β-bisabolene exhibited anti-adipogenic activity in the model organism Caenorhabditis elegans and antibacterial activity selectively against Gram-positive bacteria.
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Affiliation(s)
- De-Sen Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Lin-Lin Shi
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Kai Guo
- State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China
| | - Shi-Hong Luo
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, 110866, PR China
| | - Yan-Chun Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China
| | - Yue-Gui Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yan Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China.
| | - Sheng-Hong Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China.
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Chen R, Wei Q, Liu Y, Wei X, Chen X, Yin X, Xie T. Transcriptome sequencing and functional characterization of new sesquiterpene synthases from Curcuma wenyujin. Arch Biochem Biophys 2021; 709:108986. [PMID: 34252391 DOI: 10.1016/j.abb.2021.108986] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/22/2021] [Accepted: 07/08/2021] [Indexed: 12/13/2022]
Abstract
Tubers of Curcuma wenyujin are rich in essential oils, mainly various sesquiterpenes, showing antibacterial, anti-viral and anti-tumor effects. However, the molecular mechanism of C. wenyujin is deficient and related sesquiterpene synthases are still unclear. In this study, the transcriptome data of tubers and leaves from C. wenyujin were obtained and assembled into 78 092 unigenes. Of them, 244 unigenes were predicted to be involved in terpenoid biosynthesis while 131 unigenes were categorized as the "Terpenoid backbone biosynthesis" (TBB) term. Twenty-two unigenes possessed terpene synthase domain; five were predicted to be sesquiterpene synthases. Of the 208 unigenes annotated as cytochromes P450, 8 unigenes with full-length coding sequences were part of the CYP71 clade that primarily may perform hydroxylations of specialized metabolites. Furthermore, Ten DEGs related to the C5 precursor supply and sesquiterpene synthesis were validated by Real-time PCR; that showed a close correspondence with transcriptome sequence. A novel germacrene B synthase (CwGBS) and α-santalene synthase (CwSS) were identified in metabolically engineering E. coli. This study provided the first de novo transcriptome comparative analysis of leaf and tuber tissues from C. wenyujin, aiming to understand genetic mechanisms. Key genes involved in the biosynthesis of sesquiterpene will help for revealing the underlying mechanisms of C. wenyujin.
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Singh S, Thulasiram HV, Sengupta D, Kulkarni K. Dynamic coupling analysis on plant sesquiterpene synthases provides leads for the identification of product specificity determinants. Biochem Biophys Res Commun 2020; 536:107-114. [PMID: 33387748 DOI: 10.1016/j.bbrc.2020.12.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
Abstract
Sesquiterpene synthases catalyse cyclisation of farnesyl pyrophosphate to produce diverse sesquiterpenes. Despite utilising the same substrate and exhibiting significant sequence and structural homology, these enzymes form different products. Previous efforts were based on identifying the effect of divergent residues present at the catalytic binding pocket on the product specificity of these enzymes. However, the rationales deduced for the product specificity from these studies were not generic enough to be applicable to other phylogenetically distant members of this family. To address this problem, we have developed a novel approach combining sequence, structural and dynamical information of plant sesquiterpene synthases (SSQs) to predict product modulating residues (PMRs). We tested this approach on the SSQs with known PMRs and also on sesquisabinene synthase 1 (SaSQS1), a SSQ from Indian sandalwood. Our results show that the dynamical sectors of SSQs obtained from molecular dynamics simulation and their hydrophobicity and vicinity indices together provide leads for the identification of PMRs. The efficacy of the technique was tested on SaSQS1 using mutagenesis. To the best of our knowledge, this is a first technique of this kind which provides cues on PMRs of SSQs, with divergent phylogenetic relationship.
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Affiliation(s)
- Sneha Singh
- Division of Biochemical Sciences, CSIR - National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Hirekodathakallu V Thulasiram
- Division of Organic Chemistry, CSIR - National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Durba Sengupta
- Division of Physical and Materials Chemistry, CSIR - National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kiran Kulkarni
- Division of Biochemical Sciences, CSIR - National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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