1
|
Kong Y, Liu Y, Wang K, Wang T, Wang C, Ai B, Jia H, Pan G, Yin M, Xu Z. Confirmation of the stereochemistry of spiroviolene. Beilstein J Org Chem 2024; 20:852-858. [PMID: 38655555 PMCID: PMC11035986 DOI: 10.3762/bjoc.20.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 04/10/2024] [Indexed: 04/26/2024] Open
Abstract
We confirm the previously revised stereochemistry of spiroviolene by X-ray crystallographically characterizing a hydrazone derivative of 9-oxospiroviolane, which is synthesized by hydroboration/oxidation of spiroviolene followed by oxidation of the resultant hydroxy group. An unexpected thermal boron migration occurred during the hydroboration process of spiroviolene that resulted in the production of a mixture of 1α-hydroxyspiroviolane, 9α- and 9β-hydroxyspiroviolane after oxidation. The assertion of the cis-orientation of the 19- and 20-methyl groups provided further support for the revised cyclization mechanism of spiroviolene.
Collapse
Affiliation(s)
- Yao Kong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Yuanning Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Kaibiao Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Tao Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Chen Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Ben Ai
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| | - Guohui Pan
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Yin
- School of Medicine, Yunnan University, 2 North Cui Hu Road, Kunming 650091, China
| | - Zhengren Xu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo 315010, China
| |
Collapse
|
2
|
Xu H, Dickschat JS. Isotopic labelings for mechanistic studies. Methods Enzymol 2024; 699:163-186. [PMID: 38942502 DOI: 10.1016/bs.mie.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
The intricate mechanisms in the biosynthesis of terpenes belong to the most challenging problems in natural product chemistry. Methods to address these problems include the structure-based site-directed mutagenesis of terpene synthases, computational approaches, and isotopic labeling experiments. The latter approach has a long tradition in biosynthesis studies and has recently experienced a revival, after genome sequencing enabled rapid access to biosynthetic genes and enzymes. Today, this allows for a combined approach in which isotopically labeled substrates can be incubated with recombinant terpene synthases. These clearly defined reaction setups can give detailed mechanistic insights into the reactions catalyzed by terpene synthases, and recent developments have substantially deepened our understanding of terpene biosynthesis. This chapter will discuss the state of the art and introduce some of the most important methods that make use of isotopic labelings in mechanistic studies on terpene synthases.
Collapse
Affiliation(s)
- Houchao Xu
- Kekulé-Institute for Organic Chemistry and Biochemistry, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany.
| |
Collapse
|
3
|
Huang ZY, Taizoumbe KA, Liang C, Goldfuss B, Xu JH, Dickschat JS. Spiroluchuene A Synthase: A Cyclase from Aspergillus luchuensis Forming a Spirotetracyclic Diterpene. Angew Chem Int Ed Engl 2023; 62:e202315659. [PMID: 37962519 DOI: 10.1002/anie.202315659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 11/15/2023]
Abstract
The diterpene synthase AlTS was identified from Aspergillus luchuensis. AlTS catalyses the formation of the diterpene hydrocarbon spiroluchuene A, which exhibits a novel skeleton characterised by a spirocyclic ring system. The cyclisation mechanism towards this compound was elucidated through isotopic labelling experiments in conjunction with DFT calculations and metadynamic simulations. The biosynthetic intermediate luchudiene, besides the derivative spiroluchuene B, was captured from an enzyme variant obtained through site-directed mutagenesis. With its 10-membered ring luchudiene is structurally related to germacrenes and can undergo a Cope rearrangement to luchuelemene.
Collapse
Affiliation(s)
- Zheng-Yu Huang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Kizerbo A Taizoumbe
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Chengqin Liang
- College of Pharmacy, Guilin Medical University, Guilin, 541004, China
| | - Bernd Goldfuss
- Department of Chemistry, University of Cologne, Greinstraße 4, 50939, Cologne, Germany
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Jeroen S Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| |
Collapse
|
4
|
Abstract
Covering: 2020This review covers the literature published in 2020 for marine natural products (MNPs), with 757 citations (747 for the period January to December 2020) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1407 in 420 papers for 2020), together with the relevant biological activities, source organisms and country of origin. Pertinent reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. A meta analysis of bioactivity data relating to new MNPs reported over the last five years is also presented.
Collapse
Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.,School of Enivironment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | | |
Collapse
|
5
|
Sato H, Takagi T, Miyamoto K, Uchiyama M. Theoretical Study on the Mechanism of Spirocyclization in Spiroviolene Biosynthesis. Chem Pharm Bull (Tokyo) 2021; 69:1034-1038. [PMID: 34602572 DOI: 10.1248/cpb.c21-00536] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Spiroviolene is a spirocyclic triquinane diterpene produced by Streptomyces violens. Recently, a biosynthetic pathway that includes secondary carbocation intermediates and a complicated concerted skeletal rearrangement was proposed for spiroviolene, based upon careful labeling experiments. On the basis of density functional theory (DFT) calculations, we propose a revised pathway for spiroviolene biosynthesis, involving a multistep carbocation cascade that bypasses the formation of unstable secondary carbocations by breaking the adjacent C-C bond to form a more stable tertiary carbocation (IM3) and by Wagner-Meerwein 1,2-methyl rearrangement (IM7).
Collapse
Affiliation(s)
- Hajime Sato
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi
| | - Taisei Takagi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | | | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Research Initiative for Supra-Materials (RISM), Shinshu University
| |
Collapse
|
6
|
Galliher MS, Roldan BJ, Stephenson CRJ. Evolution towards green radical generation in total synthesis. Chem Soc Rev 2021; 50:10044-10057. [PMID: 34350919 PMCID: PMC9074136 DOI: 10.1039/d1cs00411e] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of radicals as intermediates in total synthesis has evolved since their initial use in the latter half of the twentieth century. Radical generation from metal hydride methodologies has shifted to "greener" techniques including catalytic metal-mediated systems, electrochemical and photoredox-mediated processes. This review will focus on these classical and contemporary methods for radical generation and their applications in recent total syntheses.
Collapse
Affiliation(s)
- Matthew S Galliher
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI 48109, USA.
| | - Bec J Roldan
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI 48109, USA.
| | - Corey R J Stephenson
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI 48109, USA.
| |
Collapse
|
7
|
Wu H, Ding Y, Hu K, Long X, Qu C, Puno PT, Deng J. Bioinspired Network Analysis Enabled Divergent Syntheses and Structure Revision of Pentacyclic Cytochalasans. Angew Chem Int Ed Engl 2021; 60:15963-15971. [PMID: 33860618 DOI: 10.1002/anie.202102831] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Indexed: 12/11/2022]
Abstract
We accomplished the divergent total syntheses of ten pentacyclic cytochalasans (aspergillin PZ, trichodermone, trichoderones, flavipesines, and flavichalasines) from a common precursor aspochalasin D and revised the structures of trichoderone B, spicochalasin A, flavichalasine C, aspergilluchalasin based on structure network analysis of the cytochalasans biosynthetic pathways and DFT calculations. The key steps of the syntheses include transannular alkene/epoxyalkene and carbonyl-ene cyclizations to establish the C/D ring of pentacyclic aspochalasans. Our bioinspired approach to these pentacyclic cytochalasans validate the proposed biosynthetic speculation from a chemical view and provide a platform for the synthesis of more than 400 valuable cytochalasans bearing different macrocycles and amino-acid residues.
Collapse
Affiliation(s)
- Hai Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yiming Ding
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Kun Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Xianwen Long
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Chunlei Qu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Pema-Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Jun Deng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| |
Collapse
|
8
|
Wu H, Ding Y, Hu K, Long X, Qu C, Puno P, Deng J. Bioinspired Network Analysis Enabled Divergent Syntheses and Structure Revision of Pentacyclic Cytochalasans. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hai Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
- University of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Yiming Ding
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
- University of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Kun Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Xianwen Long
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
- University of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Chunlei Qu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
- University of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Pema‐Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Jun Deng
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| |
Collapse
|
9
|
Zhang YA, Milkovits A, Agarawal V, Taylor CA, Snyder SA. Total Synthesis of the Meroterpenoid Manginoid A as Fueled by a Challenging Pinacol Coupling and Bicycle-forming Etherification. Angew Chem Int Ed Engl 2021; 60:11127-11132. [PMID: 33644941 DOI: 10.1002/anie.202016178] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/17/2021] [Indexed: 12/17/2022]
Abstract
The manginoids are a unique collection of bioactive natural products whose structures fuse an oxa-bridged spirocyclohexanedione with a heavily substituted trans-hydrindane framework. Herein, we show that such architectures can be accessed through a strategy combining a challenging pinacol coupling and bicycle-forming etherification with several additional chemo- and regioselective reactions. The success of these key events proved to be highly substrate and condition specific, affording insights for their application to other targets. As a result, not only has a 19-step total synthesis of manginoid A been achieved, but a potential roadmap to access other members of the family and related natural products has also been identified.
Collapse
Affiliation(s)
- Yu-An Zhang
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Amanda Milkovits
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Valay Agarawal
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Cooper A Taylor
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Scott A Snyder
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| |
Collapse
|
10
|
Zhang Y, Milkovits A, Agarawal V, Taylor CA, Snyder SA. Total Synthesis of the Meroterpenoid Manginoid A as Fueled by a Challenging Pinacol Coupling and Bicycle‐forming Etherification. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016178] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yu‐An Zhang
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Amanda Milkovits
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Valay Agarawal
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Cooper A. Taylor
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Scott A. Snyder
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| |
Collapse
|
11
|
Schriever K, Saenz-Mendez P, Rudraraju RS, Hendrikse NM, Hudson EP, Biundo A, Schnell R, Syrén PO. Engineering of Ancestors as a Tool to Elucidate Structure, Mechanism, and Specificity of Extant Terpene Cyclase. J Am Chem Soc 2021; 143:3794-3807. [PMID: 33496585 PMCID: PMC8023661 DOI: 10.1021/jacs.0c10214] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Indexed: 12/21/2022]
Abstract
Structural information is crucial for understanding catalytic mechanisms and to guide enzyme engineering efforts of biocatalysts, such as terpene cyclases. However, low sequence similarity can impede homology modeling, and inherent protein instability presents challenges for structural studies. We hypothesized that X-ray crystallography of engineered thermostable ancestral enzymes can enable access to reliable homology models of extant biocatalysts. We have applied this concept in concert with molecular modeling and enzymatic assays to understand the structure activity relationship of spiroviolene synthase, a class I terpene cyclase, aiming to engineer its specificity. Engineering a surface patch in the reconstructed ancestor afforded a template structure for generation of a high-confidence homology model of the extant enzyme. On the basis of structural considerations, we designed and crystallized ancestral variants with single residue exchanges that exhibited tailored substrate specificity and preserved thermostability. We show how the two single amino acid alterations identified in the ancestral scaffold can be transferred to the extant enzyme, conferring a specificity switch that impacts the extant enzyme's specificity for formation of the diterpene spiroviolene over formation of sesquiterpenes hedycaryol and farnesol by up to 25-fold. This study emphasizes the value of ancestral sequence reconstruction combined with enzyme engineering as a versatile tool in chemical biology.
Collapse
Affiliation(s)
- Karen Schriever
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 114 28 Stockholm, Sweden
| | - Patricia Saenz-Mendez
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 114 28 Stockholm, Sweden
| | | | - Natalie M. Hendrikse
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 114 28 Stockholm, Sweden
- Swedish
Orphan Biovitrum AB, 112
76 Stockholm, Sweden
| | - Elton P. Hudson
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Protein Science, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
| | - Antonino Biundo
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 114 28 Stockholm, Sweden
| | - Robert Schnell
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, 17 165 Stockholm, Sweden
| | - Per-Olof Syrén
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Science
for Life Laboratory, KTH Royal Institute
of Technology, 114 28 Stockholm, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 114 28 Stockholm, Sweden
- Wallenberg
Wood Science Center, Teknikringen 56−58, 100 44 Stockholm, Sweden
| |
Collapse
|
12
|
Xu H, Dickschat JS. Revision of the Cyclisation Mechanism for the Diterpene Spiroviolene and Investigations of Its Mass Spectrometric Fragmentation. Chembiochem 2021; 22:850-854. [PMID: 33084237 PMCID: PMC7983979 DOI: 10.1002/cbic.202000682] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/21/2020] [Indexed: 01/15/2023]
Abstract
The diterpene spiroviolene, its diterpene synthase from Streptomyces violens and the experimentally determined terpene cyclisation mechanism were reported in 2017. Recently, the structure of spiroviolene was revised based on a total synthesis, with consequences for the cyclisation mechanism. Herein, a reinvestigation of the terpene cyclisation to spiroviolene and the mass spectrometric fragmentation mechanism investigated by 13 C-labelling experiments are presented.
Collapse
Affiliation(s)
- Houchao Xu
- Kekulé Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
| | - Jeroen S. Dickschat
- Kekulé Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
| |
Collapse
|