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Ma RF, Liu H, Zhao XC, Shan P, Sun P, Xue JJ, Wei G, Zhang H. Meroterpenoids from Daphne genkwa shows promising in vitro antitumor activity via inhibiting PI3K/Akt/mTOR signaling pathway in A549 cells. Bioorg Chem 2023; 140:106803. [PMID: 37659144 DOI: 10.1016/j.bioorg.2023.106803] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/20/2023] [Accepted: 08/21/2023] [Indexed: 09/04/2023]
Abstract
Phytochemical investigation into the leaves and branches of Daphne genkwa afforded 25 meroterpenoids (1-16) including nine pairs of enantiomers (1a/1b-8a/8b and 12a/12b), among which 20 compounds have been reported in the present work for the first time. The structures with absolute configurations of the new molecules (excluding 10-13) were established via comprehensive spectroscopic analyses especially electronic circular dichroism (ECD) and Mosher's methods. A preliminary in vitro cell viability assay revealed remarkable cytotoxicities of selective compounds against A549 (lung), Hela (cervical), MDA-MB231 (breast) and MCF-7 (breast) cancer cells, and compound 8a showed the best inhibitory activity with IC50 values in the range of 3.12-4.67 μM toward the four cell lines. Subsequent in vitro antitumor evaluation of 8a disclosed that it could inhibit the proliferation and metastasis, as well as induce significant apoptosis and cycle arrest, of A549 cells. Further mechanistic investigations revealed that 8a could exert its antitumor activity via inhibiting the PI3K/Akt/mTOR signaling pathway.
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Affiliation(s)
- Ren-Fen Ma
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China; School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Hu Liu
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Xue-Chun Zhao
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Peipei Shan
- Institute of Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
| | - Ping Sun
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Jun-Juan Xue
- School of Chinese Medicine, Shandong College of Traditional Chinese Medicine, Yantai 264199, China
| | - Guodong Wei
- School of Chinese Medicine, Shandong College of Traditional Chinese Medicine, Yantai 264199, China
| | - Hua Zhang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China.
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Song Z, Chen D, Sui S, Wang Y, Cen S, Dai J. Characterization of a Malabaricane-Type Triterpene Synthase from Astragalus membranaceus and Enzymatic Synthesis of Astramalabaricosides. JOURNAL OF NATURAL PRODUCTS 2023. [PMID: 37336771 DOI: 10.1021/acs.jnatprod.3c00331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Triterpenoids are a large and medicinally important group of natural products with a wide range of biological and pharmacological effects. Among them, malabaricane-type triterpenoids are a rare group of terpenoids with a 6,6,5-tricyclic ring system, and a few malabaricane triterpene synthases have been characterized to date. Here, an arabidiol synthase AmAS for the formation of the malabaricane-type 6,6,5-tricyclic triterpenoid skeleton in astramalabaricosides biosynthesis was characterized from Astragalus membranaceus. Multiple sequence alignment, site-directed mutagenesis, and molecular docking of AmAS reveal that residues Q256 and Y258 are essential for AmAS activity, and the triad motif IIH725-727 was the critical residue necessary for its product specificity. Mutation of IIH725-727 with VFN led to the formation of seven tricyclic, tetracyclic, and pentacyclic triterpenoids (1-7). Glycosylation of malabaricane-type triterpenoids in the biosynthesis of astramalabaricosides was also explored. Three triterpenoids (1, 5, and 6) displayed potent inhibitory effects against influenza A virus in vitro. These findings provide insights into malabaricane-type triterpenoids biosynthesis in A. membranaceus and access to diverse bioactive triterpenoids for drug discovery.
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Affiliation(s)
- Zhijun Song
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Dawei Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Songyang Sui
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yujia Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Shan Cen
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jungui Dai
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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Huang ZY, Ye RY, Yu HL, Li AT, Xu JH. Mining methods and typical structural mechanisms of terpene cyclases. BIORESOUR BIOPROCESS 2021; 8:66. [PMID: 38650244 PMCID: PMC10992375 DOI: 10.1186/s40643-021-00421-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/24/2021] [Indexed: 12/13/2022] Open
Abstract
Terpenoids, formed by cyclization and/or permutation of isoprenes, are the most diverse and abundant class of natural products with a broad range of significant functions. One family of the critical enzymes involved in terpenoid biosynthesis is terpene cyclases (TCs), also known as terpene synthases (TSs), which are responsible for forming the ring structure as a backbone of functionally diverse terpenoids. With the recent advances in biotechnology, the researches on terpene cyclases have gradually shifted from the genomic mining of novel enzyme resources to the analysis of their structures and mechanisms. In this review, we summarize both the new methods for genomic mining and the structural mechanisms of some typical terpene cyclases, which are helpful for the discovery, engineering and application of more and new TCs.
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Affiliation(s)
- Zheng-Yu Huang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, China
| | - Ru-Yi Ye
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, China
| | - Hui-Lei Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, China
| | - Ai-Tao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, China
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, China.
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Liu Z, Zhang Y, Sun J, Huang WC, Xue C, Mao X. A Novel Soluble Squalene-Hopene Cyclase and Its Application in Efficient Synthesis of Hopene. Front Bioeng Biotechnol 2020; 8:426. [PMID: 32478051 PMCID: PMC7232578 DOI: 10.3389/fbioe.2020.00426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/14/2020] [Indexed: 11/13/2022] Open
Abstract
Hopene is an important precursor for synthesizing bioactive hopanoids with great commercial value. However, the chemical methods for synthesizing hopene are not efficient to date. Hopene is commonly obtained by extracting from plants or bacteria like other terpenoids, but the complicated extraction process is inefficient and unfriendly to the environment. Hopene can be biological synthesized by squalene-hopene cyclase (SHC) from squalene. However, hopene production by SHC remained at a low level until now. In this work, we found a novel SHC named OUC-SaSHC from Streptomyces albolongus ATCC 27414. An easy procedure for expression and purification of OUC-SaSHC was established. The conditions for OUC-SaSHC to convert squalene into hopene are optimized as in 100 mM sodium phosphate buffer (pH 7.0) containing 0.5% Tween 80, 20 mM squalene and 0.14 mg/mL OUC-SaSHC at 30°C. In the scale-up reaction with the final volume of 100 mL, the yield of squalene could be up to 99% at 36 h, and 8.07 mg/mL hopene was produced. Our work showed a great potential of OUC-SaSHC as biocatalyst on scale-up production of hopene, hence improves the SHC-catalyzing enzyme synthesis of hopene from laboratory level to application level.
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Affiliation(s)
- Zhen Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Yinan Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Jianan Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Wen-Can Huang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Quilez Del Moral JF, Domingo V, Pérez Á, Martínez Andrade KA, Enríquez L, Jaraiz M, López-Pérez JL, Barrero AF. Mimicking Halimane Synthases: Monitoring a Cascade of Cyclizations and Rearrangements from Epoxypolyprenes. J Org Chem 2019; 84:13764-13779. [PMID: 31559826 DOI: 10.1021/acs.joc.9b01996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We have developed and rationalized a biomimetic transformation mimicking halimane synthases based on a Lewis acid-catalyzed cascade of cyclizations and rearrangements of epoxypolyprenes. Two rings, three stereogenic centers, and a new double bond were generated in a single chemical operation. Based on this cascade transformation, we achieved a unified strategy toward the stereoselective total syntheses of halimene-type terpenoids and analogues as a proof-of-concept study. This method has been applied to the rapid synthesis of diterpene isotuberculosinol, a virulence factor of Mycobacterium tuberculosis as a representative example.
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Affiliation(s)
- José F Quilez Del Moral
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Victoriano Domingo
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Álvaro Pérez
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Kevin A Martínez Andrade
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Lourdes Enríquez
- Department of Electronics , University of Valladolid , 47011 Valladolid , Spain
| | - Martín Jaraiz
- Department of Electronics , University of Valladolid , 47011 Valladolid , Spain
| | - José Luis López-Pérez
- Department of Pharmaceutical Sciences, IBSAL-CIETUS , University of Salamanca , 37007 Salamanca , Spain.,Department of Pharmacology, Faculty of Medicine , University of Panama , 3366 Panama , Republic of Panama
| | - Alejandro F Barrero
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
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Nakano C, Watanabe T, Minamino M, Hoshino T. Enzymatic syntheses of novel carbocyclic scaffolds with a 6,5 + 5,5 ring system by squalene-hopene cyclase. Org Biomol Chem 2019; 17:9375-9389. [DOI: 10.1039/c9ob01941c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel scaffold with a 6,5 + 5, 5 ring system (allodammarane) was synthesized from 27-norsqualene (13a), 3R-(18) and 3S-27-noroxidosqualenes (19).
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Affiliation(s)
- Chiaki Nakano
- Department of Applied Biological Chemistry
- Faculty of Agriculture
- and Graduate School of Science and Technology
- Niigata University
- Niigata
| | - Takumi Watanabe
- Department of Applied Biological Chemistry
- Faculty of Agriculture
- and Graduate School of Science and Technology
- Niigata University
- Niigata
| | - Mai Minamino
- Department of Applied Biological Chemistry
- Faculty of Agriculture
- and Graduate School of Science and Technology
- Niigata University
- Niigata
| | - Tsutomu Hoshino
- Department of Applied Biological Chemistry
- Faculty of Agriculture
- and Graduate School of Science and Technology
- Niigata University
- Niigata
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