1
|
Grundmann CO, Guzman J, Vilcinskas A, Pupo MT. The insect microbiome is a vast source of bioactive small molecules. Nat Prod Rep 2024; 41:935-967. [PMID: 38411238 DOI: 10.1039/d3np00054k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Covering: September 1964 to June 2023Bacteria and fungi living in symbiosis with insects have been studied over the last sixty years and found to be important sources of bioactive natural products. Not only classic producers of secondary metabolites such as Streptomyces and other members of the phylum Actinobacteria but also numerous bacteria from the phyla Proteobacteria and Firmicutes and an impressive array of fungi (usually pathogenic) serve as the source of a structurally diverse number of small molecules with important biological activities including antimicrobial, cytotoxic, antiparasitic and specific enzyme inhibitors. The insect niche is often the exclusive provider of microbes producing unique types of biologically active compounds such as gerumycins, pederin, dinactin, and formicamycins. However, numerous insects still have not been described taxonomically, and in most cases, the study of their microbiota is completely unexplored. In this review, we present a comprehensive survey of 553 natural products produced by microorganisms isolated from insects by collating and classifying all the data according to the type of compound (rather than the insect or microbial source). The analysis of the correlations among the metadata related to insects, microbial partners, and their produced compounds provides valuable insights into the intricate dynamics between insects and their symbionts as well as the impact of their metabolites on these relationships. Herein, we focus on the chemical structure, biosynthesis, and biological activities of the most relevant compounds.
Collapse
Affiliation(s)
| | - Juan Guzman
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
| | - Andreas Vilcinskas
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
- Institute for Insect Biotechnology, Justus-Liebig-University, Giessen, Germany
| | - Mônica Tallarico Pupo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| |
Collapse
|
2
|
Huang H, Luan X, Zuo Z. Cooperative Photoredox and Cobalt-Catalyzed Acceptorless Dehydrogenative Functionalization of Cyclopropylamides towards Allylic N,O-Acyl-acetal Derivatives. Angew Chem Int Ed Engl 2024; 63:e202401579. [PMID: 38609328 DOI: 10.1002/anie.202401579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 04/01/2024] [Accepted: 04/12/2024] [Indexed: 04/14/2024]
Abstract
We disclose herein a novel photoredox and cobalt co-catalyzed ring-opening/acceptorless dehydrogenative functionalization of mono-donor cyclopropanes. This sustainable and atom-economic approach allows the rapid assembly of a wide range of allylic N,O-acyl-acetal derivatives. The starting materials are readily available and the reaction features mild conditions, broad substrate scope, and excellent functional group compatibility. The optimized conditions accommodate assorted cycloalkylamides and primary, secondary, and tertiary alcohols, with applications in late-stage functionalization of pharmaceutically relevant compounds, stimulating further utility in medicinal chemistry. Moreover, selective nucleophilic substitutions with various carbon nucleophiles were achieved in a one-pot fashion, offering a reliable avenue to access some cyclic and acyclic derivatives.
Collapse
Affiliation(s)
- Haohao Huang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Xinjun Luan
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Zhijun Zuo
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| |
Collapse
|
3
|
Sun R, Wang J, Liang H, Li S, Yang X. Hydroalkoxylation of Enamides Catalyzed by N-Heteroarenium Iodides. J Org Chem 2024; 89:3010-3019. [PMID: 38329891 DOI: 10.1021/acs.joc.3c02453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
A facile and novel N-heteroarenium iodide-catalyzed hydroalkoxylation of enamides has been described. The protocol provides easy access to N,O-acetals, which proved to be a versatile synthetic synthon. The hydrosulfonylation, hydroamination, and hydrophosphorylation products of enamide could be indirectly provided from N,O-acetals. The reaction mechanism was further investigated, which indicated that the hydroalkoxylation of enamides was driven by weak coordination between enamide and the contact ion pair of N-heteroarenium iodide.
Collapse
Affiliation(s)
- Rui Sun
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Junyi Wang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Haoran Liang
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Shuo Li
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Xiao Yang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| |
Collapse
|
4
|
Manna A, Rohilla S, Singh VK. Enantioselective Synthesis of Thiazolopyran Derivatives via a Direct Vinylogous Michael- oxa-Michael Sequence. Org Lett 2024; 26:280-285. [PMID: 38127653 DOI: 10.1021/acs.orglett.3c03971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
An efficient diastereo- and enantioselective direct vinylogous Michael-oxa-Michael sequence between 5-alkenyl thiazolones and isopropylidene oxindoles has been developed. The reaction is catalyzed by a bifunctional squaramide catalyst that allows to access a wide range of densely substituted thiazolopyran derivatives containing a quaternary stereocenter. This protocol is flexible toward different sterically and electronically tuned substrates and is amenable to gram-scale synthesis and several synthetic transformations.
Collapse
Affiliation(s)
- Abhijit Manna
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Shweta Rohilla
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Vinod K Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| |
Collapse
|
5
|
Zhang X, Wang D, Chang M, Xu X, Li W, Wang W. Pd(II)-Catalyzed tandem selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins. Chem Commun (Camb) 2024; 60:594-597. [PMID: 38099810 DOI: 10.1039/d3cc05191a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
A practical and effective palladium-catalyzed selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins was reported. The active 2-methylene-1,3-cycloalkanedione was in situ generated via Pd-catalyzed enolate oxidation processes, and it subsequently reacted with a wide variety of olefins to afford various polysubstituted dihydropyran derivatives in good to excellent yields.
Collapse
Affiliation(s)
- Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Di Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Mengfan Chang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Xuefeng Xu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wenguang Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wanya Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| |
Collapse
|
6
|
D'Agostino PM. Highlights of biosynthetic enzymes and natural products from symbiotic cyanobacteria. Nat Prod Rep 2023; 40:1701-1717. [PMID: 37233731 DOI: 10.1039/d3np00011g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Covering: up to 2023Cyanobacteria have long been known for their intriguing repertoire of natural product scaffolds, which are often distinct from other phyla. Cyanobacteria are ecologically significant organisms that form a myriad of different symbioses including with sponges and ascidians in the marine environment or with plants and fungi, in the form of lichens, in terrestrial environments. Whilst there have been several high-profile discoveries of symbiotic cyanobacterial natural products, genomic data is scarce and discovery efforts have remained limited. However, the rise of (meta-)genomic sequencing has improved these efforts, emphasized by a steep increase in publications in recent years. This highlight focuses on selected examples of symbiotic cyanobacterial-derived natural products and their biosyntheses to link chemistry with corresponding biosynthetic logic. Further highlighted are remaining gaps in knowledge for the formation of characteristic structural motifs. It is anticipated that the continued rise of (meta-)genomic next-generation sequencing of symbiontic cyanobacterial systems will lead to many exciting discoveries in the future.
Collapse
Affiliation(s)
- Paul M D'Agostino
- Technical University of Dresden, Chair of Technical Biochemistry, Bergstraβe 66, 01069 Dresden, Germany.
| |
Collapse
|
7
|
Nisar M, Gondal HY, Cheema ZM, Yousaf S, Nadeem H. New azole-derived hemiaminal ethers as promising acetylcholinesterase inhibitors: synthesis, X-ray structures, in vitro and in silico studies. J Biomol Struct Dyn 2023; 41:15535-15548. [PMID: 37021341 DOI: 10.1080/07391102.2023.2190805] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/05/2023] [Indexed: 04/07/2023]
Abstract
A new class of azole-derived hemiaminal ethers is designed as acetylcholinesterase (AChE) inhibitors. The synthesized compounds exhibited remarkable inhibitory activity against acetylcholine. Chiral hemiaminals (3d and 3i) based on (R)-menthoxymethyl group exhibit excellent inhibition with IC50 values of 0.983 ± 1.41 and 1.154 ± 0.89 µM. Similarly, butoxymethyl derivatives 3a, 3f and 3h, also showed promising inhibition comparable to the standard drug, Donepezil. In silico studies were performed to understand the mode of interactions with the target proteins, where menthoxymethyl azoles 3d and 3i demonstrated the highest docking scores. Molecular dynamics simulations displayed the stable ligand-protein complex of 3i with effective binding interactions. The bioavailability and pharmacokinetic parameterssupported the suitability of these small molecule inhibitors to develop cost-effective drug leads for Alzheimer's disease (AD). MTT assay substantiated the non-cytotoxic nature of the compounds. The synthesized compounds are extensively characterized by 1H NMR, 13C NMR and mass spectral data and SC-XRD.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Muhammad Nisar
- Institute of Chemistry, University of Sargodha, Sargodha, Pakistan
| | | | | | - Sammer Yousaf
- HEJ Research Institute of Chemistry, ICCBS, University of Karachi, Pakistan
| | - Humaira Nadeem
- Department of Pharmaceutical Chemistry, Riphah International University, Islamabad, Pakistan
| |
Collapse
|
8
|
Song T, Luo Y, Wang K, Wang B, Yuan Q, Zhang W. Nickel-Catalyzed Remote C(sp 3)–N/O Bond Formation of Alkenes with Unactivated Amines and Alcohols. ACS Catal 2023. [DOI: 10.1021/acscatal.3c00238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Tao Song
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yicong Luo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Kuiyang Wang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Bingyi Wang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Qianjia Yuan
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
- College of Chemistry, Zhengzhou University, 75 Daxue Road, Zhengzhou 450052, China
| |
Collapse
|
9
|
Nakamura F, Kimura H, Fusetani N, Nakao Y. Two Onnamide Analogs from the Marine Sponge Theonella conica: Evaluation of Geometric Effects in the Polyene Systems on Biological Activity. Molecules 2023; 28:molecules28062524. [PMID: 36985496 PMCID: PMC10058928 DOI: 10.3390/molecules28062524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Two previously unreported onnamide analogs, 2Z- and 6Z-onnamides A (1 and 2), were isolated from the marine sponge Theonella conica collected at Amami-Oshima Is., Kagoshima Prefecture, Japan. Structures of compounds 1 and 2 were elucidated by spectral analysis. Structure–activity relationships (SARs) for effects on histone modifications and cytotoxicity against HeLa and P388 cells were characterized. The geometry in the polyene systems of onnamides affected the histone modification levels and cytotoxicity.
Collapse
Affiliation(s)
- Fumiaki Nakamura
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Hiroshi Kimura
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8501, Japan
| | - Nobuhiro Fusetani
- Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yoichi Nakao
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Correspondence: ; Tel.: +81-3-5286-3100
| |
Collapse
|
10
|
Antifungal and Antibacterial Activities of Isolated Marine Compounds. Toxins (Basel) 2023; 15:toxins15020093. [PMID: 36828408 PMCID: PMC9966175 DOI: 10.3390/toxins15020093] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/07/2023] [Accepted: 01/07/2023] [Indexed: 01/20/2023] Open
Abstract
To combat the ineffectiveness of currently available pharmaceutical medications, caused by the emergence of increasingly resistant bacterial and fungal strains, novel antibacterial and antifungal medications are urgently needed. Novel natural compounds with antimicrobial activities can be obtained by exploring underexplored habitats such as the world's oceans. The oceans represent the largest ecosystem on earth, with a high diversity of organisms. Oceans have received some attention in the past few years, and promising compounds with antimicrobial activities were isolated from marine organisms such as bacteria, fungi, algae, sea cucumbers, sea sponges, etc. This review covers 56 antifungal and 40 antibacterial compounds from marine organisms. These compounds are categorized according to their chemical structure groups, including polyketides, alkaloids, ribosomal peptides, and terpenes, and their organismal origin. The review provides the minimum inhibitory concentration MIC values and the bacterial/fungal strains against which these chemical compounds show activity. This study shows strong potential for witnessing the development of new novel antimicrobial drugs from these natural compounds isolated and evaluated for their antimicrobial activities.
Collapse
|
11
|
Dayanidhi DL, Somarelli JA, Mantyh JB, Rupprecht G, Roghani RS, Vincoff S, Shin I, Zhao Y, Kim SY, McCall S, Hong J, Hsu DS. Psymberin, a marine-derived natural product, induces cancer cell growth arrest and protein translation inhibition. Front Med (Lausanne) 2022; 9:999004. [PMID: 36743670 PMCID: PMC9894252 DOI: 10.3389/fmed.2022.999004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/18/2022] [Indexed: 01/20/2023] Open
Abstract
Colorectal cancer (CRC) is the third most prevalent form of cancer in the United States and results in over 50,000 deaths per year. Treatments for metastatic CRC are limited, and therefore there is an unmet clinical need for more effective therapies. In our prior work, we coupled high-throughput chemical screens with patient-derived models of cancer to identify new potential therapeutic targets for CRC. However, this pipeline is limited by (1) the use of cell lines that do not appropriately recapitulate the tumor microenvironment, and (2) the use of patient-derived xenografts (PDXs), which are time-consuming and costly for validation of drug efficacy. To overcome these limitations, we have turned to patient-derived organoids. Organoids are increasingly being accepted as a "standard" preclinical model that recapitulates tumor microenvironment cross-talk in a rapid, cost-effective platform. In the present work, we employed a library of natural products, intermediates, and drug-like compounds for which full synthesis has been demonstrated. Using this compound library, we performed a high-throughput screen on multiple low-passage cancer cell lines to identify potential treatments. The top candidate, psymberin, was further validated, with a focus on CRC cell lines and organoids. Mechanistic and genomics analyses pinpointed protein translation inhibition as a mechanism of action of psymberin. These findings suggest the potential of psymberin as a novel therapy for the treatment of CRC.
Collapse
Affiliation(s)
- Divya L. Dayanidhi
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
- Center for Genomics and Computational Biology, Duke University, Durham, NC, United States
| | - Jason A. Somarelli
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
| | - John B. Mantyh
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
- Center for Genomics and Computational Biology, Duke University, Durham, NC, United States
| | - Gabrielle Rupprecht
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
- Center for Genomics and Computational Biology, Duke University, Durham, NC, United States
| | - Roham Salman Roghani
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
- Center for Genomics and Computational Biology, Duke University, Durham, NC, United States
| | - Sophia Vincoff
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
| | - Iljin Shin
- Department of Chemistry, Duke University, Durham, NC, United States
| | - Yiquan Zhao
- Department of Chemistry, Duke University, Durham, NC, United States
| | - So Young Kim
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, United States
| | - Shannon McCall
- Department of Pathology, Duke University, Durham, NC, United States
| | - Jiyong Hong
- Department of Chemistry, Duke University, Durham, NC, United States
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, United States
| | - David S. Hsu
- Division of Medical Oncology, Department of Medicine, Duke University Medical Center, Durham, NC, United States
- Center for Genomics and Computational Biology, Duke University, Durham, NC, United States
| |
Collapse
|
12
|
Shimizu D, Kurose A, Nishikata T. Remote Nucleophilic Substitution at a C(sp 3)–H Bond of α-Bromocarboxamides via 1,4-Hydrogen Atom Transfer To Access N-Acyl- N, O-acetal Compounds. Org Lett 2022; 24:7873-7877. [DOI: 10.1021/acs.orglett.2c02716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daisuke Shimizu
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Ayako Kurose
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| |
Collapse
|
13
|
Yang KX, Ji DS, Zheng H, Gu Y, Xu PF. Organocatalytic inverse-electron-demand Diels-Alder reaction between 5-alkenyl thiazolones and β,γ-unsaturated carbonyl compounds. Chem Commun (Camb) 2022; 58:4227-4230. [PMID: 35285468 DOI: 10.1039/d2cc00457g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An inverse-electron-demand oxa-Diels-Alder reaction of 5-alkenyl thiazolones with β,γ-unsaturated carbonyl compounds enabled by quinine thiourea was studied, which allows the enantioselective synthesis of a broad range of highly functionalized pyranthiazoles bearing three continuous stereocenters. This protocol is adaptable to a wide scope of substrates and has great potential for scale-up synthesis and facile transformation.
Collapse
Affiliation(s)
- Kai-Xuan Yang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Dong-Sheng Ji
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Haixue Zheng
- State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Yucheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China.
| |
Collapse
|
14
|
An isotopic labeling approach linking natural products with biosynthetic gene clusters. Nat Chem Biol 2022; 18:295-304. [PMID: 34969972 PMCID: PMC8891042 DOI: 10.1038/s41589-021-00949-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 10/29/2021] [Indexed: 12/31/2022]
Abstract
Major advances in genome sequencing and large-scale biosynthetic gene cluster (BGC) analysis have prompted an age of natural product discovery driven by genome mining. Still, connecting molecules to their cognate BGCs is a substantial bottleneck for this approach. We have developed a mass-spectrometry-based parallel stable isotope labeling platform, termed IsoAnalyst, which assists in associating metabolite stable isotope labeling patterns with BGC structure prediction to connect natural products to their corresponding BGCs. Here we show that IsoAnalyst can quickly associate both known metabolites and unknown analytes with BGCs to elucidate the complex chemical phenotypes of these biosynthetic systems. We validate this approach for a range of compound classes, using both the type strain Saccharopolyspora erythraea and an environmentally isolated Micromonospora sp. We further demonstrate the utility of this tool with the discovery of lobosamide D, a new and structurally unique member of the family of lobosamide macrolactams.
Collapse
|
15
|
El-Demerdash A, Al-Karmalawy AA, Abdel-Aziz TM, Elhady SS, Darwish KM, Hassan AHE. Investigating the structure-activity relationship of marine natural polyketides as promising SARS-CoV-2 main protease inhibitors. RSC Adv 2021; 11:31339-31363. [PMID: 35496831 PMCID: PMC9041294 DOI: 10.1039/d1ra05817g] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 09/16/2021] [Indexed: 02/05/2023] Open
Abstract
Since its first report in December 2019, the novel coronavirus virus, SARS-CoV-2, has caused an unprecedented global health crisis and economic loss imposing a tremendous burden on the worldwide finance, healthcare system, and even daily life. Even with the introduction of different preventive vaccines, there is still a dire need for effective antiviral therapeutics. Nature has been considered as the historical trove of drug discovery and development, particularly in cases of worldwide crises. Herein, a comprehensive in silico investigation of a highly focused chemical library of 34 pederin-structurally related marine compounds, belonging to four polyketides families, was initiated against the SARS-CoV-2 main protease, Mpro, being the key replicating element of the virus and main target in many drugs development programs. Two of the most potent SARS-CoV-2 Mpro co-crystallized inhibitors, O6K and N3, were added to the tested database as reference standards. Through molecular docking simulation, promising compounds including Pederin (1), Dihydro-onnamide A (11), Onnamide C (14), Pseudo-onnamide A (17), and Theopederin G (29) have been identified from different families based on their superior ligand-protein energies and relevant binding profiles with the key Mpro pocket residues. Thermodynamic behaviors of the identified compounds were investigated through 200 ns all-atom molecular dynamics simulation illustrating their significant stability and pocket accommodation. Furthermore, structural activity preferentiality was identified for the pederin-based marine compounds highlighting the importance of the terminal guanidine and cyclic hemiacetal linker, and the length of the sidechain. Our findings highlight the challenges of targeting SARS-CoV-2 Mpro as well as recommending further in vitro and in vivo studies regarding the examined marine products either alone or in combination paving the way for promising lead molecules.
Collapse
Affiliation(s)
- Amr El-Demerdash
- Chemistry Department, Organic Chemistry Division, Faculty of Science, Mansoura University Mansoura 35516 Egypt
- Metabolic Biology & Biological Chemistry Department, John Innes Centre Norwich Research Park Norwich NR4 7UH UK
| | - Ahmed A Al-Karmalawy
- Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Horus University-Egypt New Damietta 34518 Egypt
| | - Tarek Mohamed Abdel-Aziz
- Department of Cellular and Integrative Physiology, University of Texas Health Science Centre at San Antonio San Antonio Texas 78229-3900 USA
- Zoology Department, Faculty of Science, Minia University El-Minia 61519 Egypt
| | - Sameh S Elhady
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University Jeddah Saudi Arabia
| | - Khaled M Darwish
- Department of Medicinal Chemistry, Faculty of Pharmacy, Suez Canal University Ismailia Egypt
| | - Ahmed H E Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University Mansoura 35516 Egypt
| |
Collapse
|
16
|
Little RF, Hertweck C. Chain release mechanisms in polyketide and non-ribosomal peptide biosynthesis. Nat Prod Rep 2021; 39:163-205. [PMID: 34622896 DOI: 10.1039/d1np00035g] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Review covering up to mid-2021The structure of polyketide and non-ribosomal peptide natural products is strongly influenced by how they are released from their biosynthetic enzymes. As such, Nature has evolved a diverse range of release mechanisms, leading to the formation of bioactive chemical scaffolds such as lactones, lactams, diketopiperazines, and tetronates. Here, we review the enzymes and mechanisms used for chain release in polyketide and non-ribosomal peptide biosynthesis, how these mechanisms affect natural product structure, and how they could be utilised to introduce structural diversity into the products of engineered biosynthetic pathways.
Collapse
Affiliation(s)
- Rory F Little
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
| | - Christian Hertweck
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
| |
Collapse
|
17
|
Bold CP, Gut M, Schürmann J, Lucena-Agell D, Gertsch J, Díaz JF, Altmann KH. Synthesis of Morpholine-Based Analogues of (-)-Zampanolide and Their Biological Activity. Chemistry 2021; 27:5936-5943. [PMID: 33078440 DOI: 10.1002/chem.202003996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/17/2020] [Indexed: 12/23/2022]
Abstract
We describe the convergent synthesis of three prototypical examples of a new class of analogues of the complex, cytotoxic marine macrolide (-)-zampanolide that incorporate an embedded N-substituted morpholine moiety in place of the natural tetrahydropyran ring. The final construction of the macrolactone core was based on a high-yielding intramolecular HWE olefination, while the hemiaminal-linked side chain was elaborated through a stereoselective, BINAL-H-mediated addition of (Z,E)-sorbamide to a macrocyclic aldehyde precursor. The synthesis of the common functionalized morpholine building block involved two consecutive epoxide openings with tosylamide and the product of the first opening reaction, respectively, as nucleophiles. Of the three morpholino-zampanolides investigated, the N-acetyl and the N-benzoyl derivatives both exhibited nanomolar antiproliferative activity, thus being essentially equipotent with the natural product. In contrast, the activity of the N-tosyl derivative was significantly reduced.
Collapse
Affiliation(s)
- Christian Paul Bold
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Melanie Gut
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Jasmine Schürmann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Daniel Lucena-Agell
- Centro de Investigaciones Biolόgicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Jürg Gertsch
- Department of Chemistry and Applied Biosciences, Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstrasse 28, 3012, Bern, Switzerland
| | - José Fernando Díaz
- Centro de Investigaciones Biolόgicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Karl-Heinz Altmann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| |
Collapse
|
18
|
Helfrich EJN, Ueoka R, Chevrette MG, Hemmerling F, Lu X, Leopold-Messer S, Minas HA, Burch AY, Lindow SE, Piel J, Medema MH. Evolution of combinatorial diversity in trans-acyltransferase polyketide synthase assembly lines across bacteria. Nat Commun 2021; 12:1422. [PMID: 33658492 PMCID: PMC7930024 DOI: 10.1038/s41467-021-21163-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 01/06/2021] [Indexed: 02/07/2023] Open
Abstract
Trans-acyltransferase polyketide synthases (trans-AT PKSs) are bacterial multimodular enzymes that biosynthesize diverse pharmaceutically and ecologically important polyketides. A notable feature of this natural product class is the existence of chemical hybrids that combine core moieties from different polyketide structures. To understand the prevalence, biosynthetic basis, and evolutionary patterns of this phenomenon, we developed transPACT, a phylogenomic algorithm to automate global classification of trans-AT PKS modules across bacteria and applied it to 1782 trans-AT PKS gene clusters. These analyses reveal widespread exchange patterns suggesting recombination of extended PKS module series as an important mechanism for metabolic diversification in this natural product class. For three plant-associated bacteria, i.e., the root colonizer Gynuella sunshinyii and the pathogens Xanthomonas cannabis and Pseudomonas syringae, we demonstrate the utility of this computational approach for uncovering cryptic relationships between polyketides, accelerating polyketide mining from fragmented genome sequences, and discovering polyketide variants with conserved moieties of interest. As natural combinatorial hybrids are rare among the more commonly studied cis-AT PKSs, this study paves the way towards evolutionarily informed, rational PKS engineering to produce chimeric trans-AT PKS-derived polyketides.
Collapse
Affiliation(s)
- Eric J N Helfrich
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
- Institute for Molecular Bio Science, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Reiko Ueoka
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
| | - Marc G Chevrette
- Wisconsin Institute for Discovery, Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, USA
| | - Franziska Hemmerling
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
| | - Xiaowen Lu
- Bioinformatics Group, Wageningen University, Wageningen, The Netherlands
| | - Stefan Leopold-Messer
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
| | - Hannah A Minas
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
| | - Adrien Y Burch
- Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, CA, USA
| | - Steven E Lindow
- Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, CA, USA
| | - Jörn Piel
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland.
| | - Marnix H Medema
- Bioinformatics Group, Wageningen University, Wageningen, The Netherlands.
| |
Collapse
|
19
|
Deyrup ST, Stagnitti NC, Perpetua MJ, Wong-Deyrup SW. Drug Discovery Insights from Medicinal Beetles in Traditional Chinese Medicine. Biomol Ther (Seoul) 2021; 29:105-126. [PMID: 33632986 PMCID: PMC7921859 DOI: 10.4062/biomolther.2020.229] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 11/23/2022] Open
Abstract
Traditional Chinese medicine (TCM) was the primary source of medical treatment for the people inhabiting East Asia for thousands of years. These ancient practices have incorporated a wide variety of materia medica including plants, animals and minerals. As modern sciences, including natural products chemistry, emerged, there became increasing efforts to explore the chemistry of this materia medica to find molecules responsible for their traditional use. Insects, including beetles have played an important role in TCM. In our survey of texts and review articles on TCM materia medica, we found 48 species of beetles from 34 genera in 14 different families that are used in TCM. This review covers the chemistry known from the beetles used in TCM, or in cases where a species used in these practices has not been chemically studied, we discuss the chemistry of closely related beetles. We also found several documented uses of beetles in Traditional Korean Medicine (TKM), and included them where appropriate. There are 129 chemical constituents of beetles discussed.
Collapse
Affiliation(s)
- Stephen T. Deyrup
- Department of Chemistry and Biochemistry, Siena College, Loudonville, NY 12309, USA
| | - Natalie C. Stagnitti
- Department of Chemistry and Biochemistry, Siena College, Loudonville, NY 12309, USA
| | | | - Siu Wah Wong-Deyrup
- The RNA Institute and Department of Biological Sciences, University at Albany, State University of New York, Albany, NY 12222, USA
| |
Collapse
|
20
|
Teoh MC, Furusawa G, Veera Singham G. Multifaceted interactions between the pseudomonads and insects: mechanisms and prospects. Arch Microbiol 2021; 203:1891-1915. [PMID: 33634321 DOI: 10.1007/s00203-021-02230-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 12/19/2020] [Accepted: 02/11/2021] [Indexed: 02/07/2023]
Abstract
Insects and bacteria are the most widespread groups of organisms found in nearly all habitats on earth, establishing diverse interactions that encompass the entire range of possible symbiotic associations from strict parasitism to obligate mutualism. The complexity of their interactions is instrumental in shaping the roles of insects in the environment, meanwhile ensuring the survival and persistence of the associated bacteria. This review aims to provide detailed insight on the multifaceted symbiosis between one of the most versatile bacterial genera, Pseudomonas (Gammaproteobacteria: Pseudomonadaceae) and a diverse group of insect species. The Pseudomonas engages with varied interactions with insects, being either a pathogen or beneficial endosymbiont, as well as using insects as vectors. In addition, this review also provides updates on existing and potential applications of Pseudomonas and their numerous insecticidal metabolites as biocontrol agents against pest insects for the improvement of integrated pest management strategies. Here, we have summarized several known modes of action and the virulence factors of entomopathogenic Pseudomonas strains essential for their pathogenicity against insects. Meanwhile, the beneficial interactions between pseudomonads and insects are currently limited to a few known insect taxa, despite numerous studies reporting identification of pseudomonads in the guts and haemocoel of various insect species. The vector-symbiont association between pseudomonads and insects can be diverse from strict phoresy to a role switch from commensalism to parasitism following a dose-dependent response. Overall, the pseudomonads appeared to have evolved independently to be either exclusively pathogenic or beneficial towards insects.
Collapse
Affiliation(s)
- Miao-Ching Teoh
- Centre for Chemical Biology, Universiti Sains Malaysia, 11900, Bayan Lepas, Penang, Malaysia
| | - Go Furusawa
- Centre for Chemical Biology, Universiti Sains Malaysia, 11900, Bayan Lepas, Penang, Malaysia
| | - G Veera Singham
- Centre for Chemical Biology, Universiti Sains Malaysia, 11900, Bayan Lepas, Penang, Malaysia.
| |
Collapse
|
21
|
Ohsawa K, Ochiai S, Kubota J, Doi T. Gold-Catalyzed Amide/Carbamate-Linked N,O-Acetal Formation with Bulky Amides and Alcohols. J Org Chem 2020; 86:1281-1291. [DOI: 10.1021/acs.joc.0c02640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kosuke Ohsawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki,
Aoba-ku, Sendai, 980-8578, Japan
| | - Shota Ochiai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki,
Aoba-ku, Sendai, 980-8578, Japan
| | - Junya Kubota
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki,
Aoba-ku, Sendai, 980-8578, Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki,
Aoba-ku, Sendai, 980-8578, Japan
| |
Collapse
|
22
|
Kim H, Kim S, Kim M, Lee C, Yang I, Nam SJ. Bioactive natural products from the genus Salinospora: a review. Arch Pharm Res 2020; 43:1230-1258. [PMID: 33237436 DOI: 10.1007/s12272-020-01288-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/13/2020] [Indexed: 12/29/2022]
Abstract
Actinomycetes are an important source for bioactive secondary metabolites. Among them, the genus Salinispora is one of the first salt obligatory marine species worldwide and is typically found in various types of substrates in tropical and subtropical marine environments including sediments and marine organisms. This genus produces a wide range of chemical scaffolds and bioactive compounds such as lomaiviticins, cyclomarins, rifamycins, salinaphthoquinones, and salinosporamides. This review arranged Salinispora derived secondary metabolites according to the three species that comprise the genus. Moreover, muta- and semi-synthesis analogs derived from salinosporamide were also described in this review.
Collapse
Affiliation(s)
- Haerin Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Sohee Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Minju Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Chaeyoung Lee
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Inho Yang
- Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Pusan, 49112, Korea.
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea.
| |
Collapse
|
23
|
Xiao-Yan M, Chang-Fei Z, Xinjun H, Wei Z, Yanli L. Brønsted acid catalyzed proto-functionalization of enecarbamates and enamides: A convenient route to N,O-acetals. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
24
|
Metagenomic Exploration of the Marine Sponge Mycale hentscheli Uncovers Multiple Polyketide-Producing Bacterial Symbionts. mBio 2020; 11:mBio.02997-19. [PMID: 32209692 PMCID: PMC7157528 DOI: 10.1128/mbio.02997-19] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Marine sponges have been a prolific source of unique bioactive compounds that are presumed to act as a deterrent to predation. Many of these compounds have potential therapeutic applications; however, the lack of efficient and sustainable synthetic routes frequently limits clinical development. Here, we describe a metagenomic investigation of Mycale hentscheli, a chemically gifted marine sponge that possesses multiple distinct chemotypes. We applied shotgun metagenomic sequencing, hybrid assembly of short- and long-read data, and metagenomic binning to obtain a comprehensive picture of the microbiome of five specimens, spanning three chemotypes. Our data revealed multiple producing species, each having relatively modest secondary metabolomes, that contribute collectively to the chemical arsenal of the holobiont. We assembled complete genomes for multiple new genera, including two species that produce the cytotoxic polyketides pateamine and mycalamide, as well as a third high-abundance symbiont harboring a proteusin-type biosynthetic pathway that appears to encode a new polytheonamide-like compound. We also identified an additional 188 biosynthetic gene clusters, including a pathway for biosynthesis of peloruside. These results suggest that multiple species cooperatively contribute to defensive symbiosis in M. hentscheli and reveal that the taxonomic diversity of secondary-metabolite-producing sponge symbionts is larger and richer than previously recognized.IMPORTANCE Mycale hentscheli is a marine sponge that is rich in bioactive small molecules. Here, we use direct metagenomic sequencing to elucidate highly complete and contiguous genomes for the major symbiotic bacteria of this sponge. We identify complete biosynthetic pathways for the three potent cytotoxic polyketides which have previously been isolated from M. hentscheli Remarkably, and in contrast to previous studies of marine sponges, we attribute each of these metabolites to a different producing microbe. We also find that the microbiome of M. hentscheli is stably maintained among individuals, even over long periods of time. Collectively, our data suggest a cooperative mode of defensive symbiosis in which multiple symbiotic bacterial species cooperatively contribute to the defensive chemical arsenal of the holobiont.
Collapse
|
25
|
Qin J, Zhang Y, Liu C, Zhou J, Zhan R, Chen W, Huang H. Asymmetric Inverse-Electron-Demand Diels–Alder Reaction of β,γ-Unsaturated Amides through Dienolate Catalysis. Org Lett 2019; 21:7337-7341. [DOI: 10.1021/acs.orglett.9b02629] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jialiang Qin
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yili Zhang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Cuiting Liu
- Central Laboratory, Southern Medical University, Guangzhou 510515, China
| | - Jun Zhou
- School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Ruoting Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Weiwen Chen
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Huicai Huang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| |
Collapse
|
26
|
Nakabachi A, Okamura K. Diaphorin, a polyketide produced by a bacterial symbiont of the Asian citrus psyllid, kills various human cancer cells. PLoS One 2019; 14:e0218190. [PMID: 31181122 PMCID: PMC6557518 DOI: 10.1371/journal.pone.0218190] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 05/28/2019] [Indexed: 12/15/2022] Open
Abstract
Diaphorin is a polyketide produced by Candidatus Profftella armatura (Betaproteobacteria), an organelle-like defensive symbiont harbored by a plant sap-sucking insect, Asian citrus psyllid Diaphorina citri (Hemiptera: Liviidae). Diaphorin belongs to the pederin family, a group of compounds that share much of their core structure with that of pederin, which is characterized by two dihydropyran rings bridged by an N-acyl aminal. Most members of this family have potent antitumor activity, making them promising anticancer drug candidates. The present study assessed the therapeutic potential of diaphorin for its antitumor activity against 39 human cancer cell lines including those from breast, brain, colon, lung, skin, ovary, kidney, stomach, and prostate. The results showed that diaphorin had inhibitory activity against all 39 cancer cell lines tested. The GI50, TGI, and LC50 values ranged from 0.28 μM- 2.4 μM, 1.6 μM -11 μM, and 7.5 μM-> 100 μM, respectively. These values are among the highest in the pederin family, indicating that the anticancer activity of diaphorin is milder than those of other pederin congeners. The inhibitory effects of diaphorin significantly differed among the distinct cancer types. The maximum difference was about 10-fold, which was similar to those of most other pederin congeners.
Collapse
Affiliation(s)
- Atsushi Nakabachi
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi, Aichi, Japan
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Toyohashi, Aichi, Japan
| | - Keiko Okamura
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi, Aichi, Japan
| |
Collapse
|
27
|
Hashimoto Y, Ikeda T, Ida A, Morita N, Tamura O. Inverse-Electron-Demand oxa-Diels-Alder Reactions of α-Keto-β,γ-unsaturated Esters and α,β-Unsaturated Hydrazones. Org Lett 2019; 21:4245-4249. [PMID: 31140822 DOI: 10.1021/acs.orglett.9b01422] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A concise synthetic method for dihydropyrans has been developed by inverse-electron-demand oxa-Diels-Alder reaction of α-keto-β,γ-unsaturated esters with α,β-unsaturated hydrazones as electron-rich olefins. This reaction is catalyzed by Eu(hfc)3 and proceeds in an endo-selective manner. This umpolung cycloaddition affords a variety of substituted dihydropyrans stereoselectively in high yields. In addition, indirect synthesis of formyl-substituted dihydropyran was achieved by dehydrazonation of the cycloadduct. This method is expected to be useful for the synthesis of dihydropyrans and tetrahydropyrans with unusual substitution patterns.
Collapse
Affiliation(s)
| | - Takanori Ikeda
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Ayako Ida
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Nobuyoshi Morita
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Osamu Tamura
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| |
Collapse
|
28
|
Yamada T, Hamada M, Floreancig P, Nakabachi A. Diaphorin, a polyketide synthesized by an intracellular symbiont of the Asian citrus psyllid, is potentially harmful for biological control agents. PLoS One 2019; 14:e0216319. [PMID: 31048920 PMCID: PMC6497295 DOI: 10.1371/journal.pone.0216319] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 04/19/2019] [Indexed: 12/03/2022] Open
Abstract
The Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Sternorrhyncha: Psylloidea: Liviidae) is an important pest of citrus species worldwide because it transmits Candidatus Liberibacter spp. (Alphaproteobacteria), the causative agents of an incurable citrus disease known as huanglongbing or greening disease. Diaphorina citri possesses a vertically-transmitted intracellular symbiont, Candidatus Profftella armatura (Betaproteobacteria), which produces diaphorin, a polyketide that is significantly toxic to mammalian cells. Diaphorin is an analog of pederin, a defensive polyketide in the body fluid of Paederus rove beetles (Coleoptera: Staphylinidae) that deters predators. In the present study, as a first step to assess the possibility that diaphorin is toxic to biological control agents, we assayed diaphorin activities against insects and fungi. The target cells and organisms were (a) the Sf9 cell line derived from the fall armyworm moth Spodoptera frugiperda (Lepidoptera: Noctuidae), (b) the pea aphid Acyrthosiphon pisum (Hemiptera: Sternorrhyncha: Aphidoidea: Aphididae), a phloem sap-sucking insect that is closely related to psyllids, (c) the Asian lady beetle Harmonia axyridis (Coleoptera: Coccinellidae), one of the major predators of D. citri, and (d) the budding yeast Saccharomyces cerevisiae (Ascomycota: Saccharomycetes) as a model of fungal pathogens. For a comparison, we also evaluated pederin activities. The results of our analyses revealed the following: (1) Diaphorin and pederin are significantly toxic to the tested insects and yeast; (2) Their toxicities vary widely among the target cells and organisms; (3) Diaphorin is generally less toxic than pederin; (4) The toxicities of diaphorin and pederin are considerably different in the Sf9 insect cell line and S. cerevisiae, but similar in A. pisum and H. axyridis; and (5) The amount of diaphorin contained in D. citri is toxic to all of the tested cells and organisms, suggesting that this polyketide is potentially harmful for biological control agents.
Collapse
Affiliation(s)
- Tomoko Yamada
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Toyohashi, Aichi, Japan
| | - Masato Hamada
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Toyohashi, Aichi, Japan
| | - Paul Floreancig
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Atsushi Nakabachi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Toyohashi, Aichi, Japan
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi, Aichi, Japan
| |
Collapse
|
29
|
Kust A, Mareš J, Jokela J, Urajová P, Hájek J, Saurav K, Voráčová K, Fewer DP, Haapaniemi E, Permi P, Řeháková K, Sivonen K, Hrouzek P. Discovery of a Pederin Family Compound in a Nonsymbiotic Bloom-Forming Cyanobacterium. ACS Chem Biol 2018; 13:1123-1129. [PMID: 29570981 DOI: 10.1021/acschembio.7b01048] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The pederin family includes a number of bioactive compounds isolated from symbiotic organisms of diverse evolutionary origin. Pederin is linked to beetle-induced dermatitis in humans, and pederin family members possess potent antitumor activity caused by selective inhibition of the eukaryotic ribosome. Their biosynthesis is accomplished by a polyketide/nonribosomal peptide synthetase machinery employing an unusual trans-acyltransferase mechanism. Here, we report a novel pederin type compound, cusperin, from the free-living cyanobacterium Cuspidothrix issatschenkoi (earlier Aphanizomenon). The chemical structure of cusperin is similar to that of nosperin recently isolated from the lichen cyanobiont Nostoc sharing the tehrahydropyran moiety and major part of the linear backbone. However, the cusperin molecule is extended by a glycine residue and lacks one hydroxyl substituent. Pederins were previously thought to be exclusive to symbiotic relationships. However, C. issatschenkoi is a nonsymbiotic planktonic organism and a frequent component of toxic water blooms. Cusperin is devoid of the cytotoxic activity reported for other pederin family members. Hence, our findings raise questions about the role of pederin analogues in cyanobacteria and broaden the knowledge of ecological distribution of this group of polyketides.
Collapse
Affiliation(s)
- Andreja Kust
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
- The Czech Academy of Sciences, Biology Centre, Institute of Hydrobiology, České Budějovice, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Jan Mareš
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
- The Czech Academy of Sciences, Biology Centre, Institute of Hydrobiology, České Budějovice, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Jouni Jokela
- Department of Microbiology, University of Helsinki, FI-00014 Helsinki, Finland
| | - Petra Urajová
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
| | - Jan Hájek
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Kumar Saurav
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
| | - Kateřina Voráčová
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
| | - David P. Fewer
- Department of Microbiology, University of Helsinki, FI-00014 Helsinki, Finland
| | - Esa Haapaniemi
- Department of Chemistry, University of Jyväskylä, FI-40010 Jyväskylä, Finland
| | - Perttu Permi
- Department of Chemistry, University of Jyväskylä, FI-40010 Jyväskylä, Finland
- Department of Biology and Environmental Science, Nanoscience Center, University of Jyväskylä, FI-40010 Jyväskylä, Finland
| | - Klára Řeháková
- The Czech Academy of Sciences, Biology Centre, Institute of Hydrobiology, České Budějovice, Czech Republic
| | | | - Pavel Hrouzek
- Institute of Microbiology CAS, Center Algatech, Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| |
Collapse
|
30
|
Calcott MJ, Ackerley DF, Knight A, Keyzers RA, Owen JG. Secondary metabolism in the lichen symbiosis. Chem Soc Rev 2018; 47:1730-1760. [PMID: 29094129 DOI: 10.1039/c7cs00431a] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lichens, which are defined by a core symbiosis between a mycobiont (fungal partner) and a photobiont (photoautotrophic partner), are in fact complex assemblages of microorganisms that constitute a largely untapped source of bioactive secondary metabolites. Historically, compounds isolated from lichens have predominantly been those produced by the dominant fungal partner, and these continue to be of great interest for their unique chemistry and biotechnological potential. In recent years it has become apparent that many photobionts and lichen-associated bacteria also produce a range of potentially valuable molecules. There is evidence to suggest that the unique nature of the symbiosis has played a substantial role in shaping many aspects of lichen chemistry, for example driving bacteria to produce metabolites that do not bring them direct benefit but are useful to the lichen as a whole. This is most evident in studies of cyanobacterial photobionts, which produce compounds that differ from free living cyanobacteria and are unique to symbiotic organisms. The roles that these and other lichen-derived molecules may play in communication and maintaining the symbiosis are poorly understood at present. Nonetheless, advances in genomics, mass spectrometry and other analytical technologies are continuing to illuminate the wealth of biological and chemical diversity present within the lichen holobiome. Implementation of novel biodiscovery strategies such as metagenomic screening, coupled with synthetic biology approaches to reconstitute, re-engineer and heterologously express lichen-derived biosynthetic gene clusters in a cultivable host, offer a promising means for tapping into this hitherto inaccessible wealth of natural products.
Collapse
Affiliation(s)
- Mark J Calcott
- School of Biological Sciences, Victoria University of Wellington, New Zealand.
| | | | | | | | | |
Collapse
|
31
|
Szebenyi DM, Kriksunov I, Howe KJ, Ramsey JS, Hall DG, Heck ML, Krasnoff SB. Crystal structure of diaphorin methanol monosolvate isolated from Diaphorina citri Kuwayama, the insect vector of citrus greening disease. Acta Crystallogr E Crystallogr Commun 2018; 74:445-449. [PMID: 29765742 PMCID: PMC5946964 DOI: 10.1107/s2056989018002992] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 02/20/2018] [Indexed: 11/10/2022]
Abstract
The title compound C22H39NO9·CH3OH [systematic name: (S)-N-((S)-{(2S,4R,6R)-6-[(S)-2,3-di-hydroxy-prop-yl]-4-hy-droxy-5,5-di-methyl-tetra-hydro-2H-pyran-2-yl}(hy-droxy)meth-yl)-2-hy-droxy-2-[(2R,5R,6R)-2-meth-oxy-5,6-dimeth-yl-4-methyl-ene-tetra-hydro-2H-pyran-2-yl]acetamide methanol monosolvate], was isolated from the Asian citrus psyllid, Diaphorina citri Kuwayama, and crystallizes in the space group P21. 'Candidatus Profftella armatura' a bacterial endosymbiont of D. citri, biosynthesizes diaphorin, which is a hybrid polyketide-nonribosomal peptide comprising two highly substituted tetra-hydro-pyran rings joined by an N-acyl aminal bridge [Nakabachi et al. (2013 ▸). Curr. Biol.23, 1478-1484]. The crystal structure of the title compound establishes the complete relative configuration of diaphorin, which agrees at all nine chiral centers with the structure of the methanol monosolvate of the di-p-bromo-benzoate derivative of pederin, a biogenically related compound whose crystal structure was reported previously [Furusaki et al. (1968 ▸). Tetra-hedron Lett.9, 6301-6304]. Thus, the absolute configuration of diaphorin is proposed by analogy to that of pederin.
Collapse
Affiliation(s)
- D. Marian Szebenyi
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, USA
| | - Irina Kriksunov
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, USA
| | - Kevin J. Howe
- USDA-ARS RW Holley Center for Agriculture and Health, Ithaca NY 14853, USA
| | - John S. Ramsey
- USDA-ARS RW Holley Center for Agriculture and Health, Ithaca NY 14853, USA
| | - David G. Hall
- U.S. Horticultural Research Laboratory, Fort Pierce, FL 34945, USA
| | - Michelle L. Heck
- USDA-ARS RW Holley Center for Agriculture and Health, Ithaca NY 14853, USA
- Boyce Thompson Institute for Plant Research, Ithaca, NY 14853, USA
- Plant Pathology and Plant-Microbe Biology Section, Cornell University, Ithaca, NY 14853, USA
| | - Stuart B. Krasnoff
- USDA-ARS RW Holley Center for Agriculture and Health, Ithaca NY 14853, USA
| |
Collapse
|
32
|
|
33
|
Rohrs TM, Qin Q, Floreancig PE. Re 2
O 7
-Mediated Dehydrative Cyclization Reactions: Total Synthesis of Herboxidiene and Its 12-Desmethyl Analogue. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705924] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Tyler M. Rohrs
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15260 USA
| | - Qi Qin
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15260 USA
| | - Paul E. Floreancig
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15260 USA
| |
Collapse
|
34
|
Schleissner C, Cañedo LM, Rodríguez P, Crespo C, Zúñiga P, Peñalver A, de la Calle F, Cuevas C. Bacterial Production of a Pederin Analogue by a Free-Living Marine Alphaproteobacterium. JOURNAL OF NATURAL PRODUCTS 2017; 80:2170-2173. [PMID: 28696720 DOI: 10.1021/acs.jnatprod.7b00408] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The polyketide pederin family are cytotoxic compounds isolated from insects, lichen, and marine sponges. During the past decade, different uncultivable bacteria symbionts have been proposed as the real producers of these compounds, such as those found in insects, lichen, and marine sponges, and their trans-AT polyketide synthase gene clusters have been identified. Herein we report the isolation and biological activities of a new analogue of the pederin family, compound 1, from the culture of a marine heterotrophic alphaproteobacterium, Labrenzia sp. PHM005. This is the first report of the production of a pederin-type compound by a free-living marine bacteria that could be cultured in the laboratory.
Collapse
Affiliation(s)
- Carmen Schleissner
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Librada M Cañedo
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Pilar Rodríguez
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Cristina Crespo
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Paz Zúñiga
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Ana Peñalver
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Fernando de la Calle
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| | - Carmen Cuevas
- Research and Development Department, PharmaMar S.A. , Avenida de los Reyes, 1, Colmenar Viejo 28770, Madrid, Spain
| |
Collapse
|
35
|
Rohrs TM, Qin Q, Floreancig PE. Re 2 O 7 -Mediated Dehydrative Cyclization Reactions: Total Synthesis of Herboxidiene and Its 12-Desmethyl Analogue. Angew Chem Int Ed Engl 2017; 56:10900-10904. [PMID: 28686815 DOI: 10.1002/anie.201705924] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Indexed: 12/27/2022]
Abstract
Re2 O7 catalysis effects efficient and stereoselective dehydrative cyclization reactions from monoallylic diols, with stereocontrol arising from thermodynamic equilibration. This method was applied to a rapid synthesis of the spliceosome inhibitor herboxidiene. The route was also utilized for the synthesis of an analogue that highlights the importance of a single methyl group in biasing the conformation in the acyclic region of the molecule.
Collapse
Affiliation(s)
- Tyler M Rohrs
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Qi Qin
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Paul E Floreancig
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| |
Collapse
|
36
|
Kinens A, Sejejs M, Kamlet AS, Piotrowski DW, Vedejs E, Suna E. Development of a Chiral DMAP Catalyst for the Dynamic Kinetic Resolution of Azole Hemiaminals. J Org Chem 2017; 82:869-886. [DOI: 10.1021/acs.joc.6b02955] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Artis Kinens
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
| | - Marcis Sejejs
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
- University of Latvia, Department of Chemistry, Jelgavas 1, LV-1004 Riga, Latvia
| | - Adam S. Kamlet
- Worldwide
Medicinal Chemistry, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - David W. Piotrowski
- Worldwide
Medicinal Chemistry, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - Edwin Vedejs
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
| | - Edgars Suna
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
- University of Latvia, Department of Chemistry, Jelgavas 1, LV-1004 Riga, Latvia
| |
Collapse
|
37
|
Bhushan A, Peters EE, Piel J. Entotheonella Bacteria as Source of Sponge-Derived Natural Products: Opportunities for Biotechnological Production. BLUE BIOTECHNOLOGY 2017; 55:291-314. [DOI: 10.1007/978-3-319-51284-6_9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
38
|
Shi ML, Zhan G, Zhou SL, Du W, Chen YC. Asymmetric Inverse-Electron-Demand Oxa-Diels-Alder Reaction of Allylic Ketones through Dienamine Catalysis. Org Lett 2016; 18:6480-6483. [PMID: 27978681 DOI: 10.1021/acs.orglett.6b03384] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A remote β,γ-regioselective asymmetric inverse-electron-demand oxa-Diels-Alder reaction between allylic ketones and α-cyano-α,β-unsaturated ketones has been developed through induced extended dienamine catalysis of a cinchona-derived primary amine. A spectrum of densely substituted dihydropyran frameworks were efficiently produced with excellent enantioselectivity and fair to exclusive diastereoselectivity.
Collapse
Affiliation(s)
- Ming-Lin Shi
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University , Chengdu 610041, China
| | - Gu Zhan
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University , Chengdu 610041, China
| | - Su-Lan Zhou
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University , Chengdu 610041, China
| | - Wei Du
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University , Chengdu 610041, China
| | - Ying-Chun Chen
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University , Chengdu 610041, China.,College of Pharmacy, Third Military Medical University , Shapingba, Chongqing 400038, China
| |
Collapse
|
39
|
Newman DJ. Predominately Uncultured Microbes as Sources of Bioactive Agents. Front Microbiol 2016; 7:1832. [PMID: 27917159 PMCID: PMC5114300 DOI: 10.3389/fmicb.2016.01832] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 11/01/2016] [Indexed: 12/15/2022] Open
Abstract
In this short review, I am discussing the relatively recent awareness of the role of symbionts in plant, marine-invertebrates and fungal areas. It is now quite obvious that in marine-invertebrates, a majority of compounds found are from either as yet unculturable or poorly culturable microbes, and techniques involving “state of the art” genomic analyses and subsequent computerized analyses are required to investigate these interactions. In the plant kingdom evidence is amassing that endophytes (mainly fungal in nature) are heavily involved in secondary metabolite production and that mimicking the microbial interactions of fermentable microbes leads to involvement of previously unrecognized gene clusters (cryptic clusters is one name used), that when activated, produce previously unknown bioactive molecules.
Collapse
|
40
|
Synthesis of N,O-acetals by net amide C N bond insertion of aldehydes into N-acyl phthalimides and N-acyl azoles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Liu Q, An C, TenDyke K, Cheng H, Shen YY, Hoye AT, Smith AB. Design, Synthesis, and Evaluation of Irciniastatin Analogues: Simplification of the Tetrahydropyran Core and the C(11) Substituents. J Org Chem 2016; 81:1930-42. [PMID: 26879056 PMCID: PMC4782725 DOI: 10.1021/acs.joc.5b02771] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The
design, synthesis, and biological evaluation of irciniastatin
A (1) analogues, achieved by removal of three synthetically
challenging structural units, as well as by functional group manipulation
of the C(11) substituent of both irciniastatins A and B (1 and 2), has been achieved. To this end, we first designed
a convergent synthetic route toward the diminutive analogue (+)-C(8)-desmethoxy-C(11)-deoxy-C(12)-didesmethylirciniastatin (6). Key transformations
include an acid-catalyzed 6-exo-tet pyran cyclization,
a chiral Lewis acid mediated aldol reaction, and a facile amide union.
The absolute configuration of 6 was confirmed via spectroscopic
analysis (CD spectrum, HSQC, COSY, and ROESY NMR experiments). Structure–activity
relationship (SAR) studies of 6 demonstrate that the
absence of the three native structural units permits access to analogues
possessing cytotoxic activity in the nanomolar range. Second, manipulation
of the C(11) position, employing late-stage synthetic intermediates
from our irciniastatin syntheses, provides an additional five analogues
(7–11). Biological evaluation of
these analogues indicates a high functional group tolerance at position
C(11).
Collapse
Affiliation(s)
- Qi Liu
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Chihui An
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Karen TenDyke
- Eisai Inc. , 4 Corporate Drive, Andover, Massachusetts 01810, United States
| | - Hongsheng Cheng
- Eisai Inc. , 4 Corporate Drive, Andover, Massachusetts 01810, United States
| | | | - Adam T Hoye
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
42
|
Helfrich EJN, Piel J. Biosynthesis of polyketides by trans-AT polyketide synthases. Nat Prod Rep 2016; 33:231-316. [DOI: 10.1039/c5np00125k] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review discusses the biosynthesis of natural products that are generated bytrans-AT polyketide synthases, a family of catalytically versatile enzymes that represents one of the major group of proteins involved in the production of bioactive polyketides.
Collapse
Affiliation(s)
- Eric J. N. Helfrich
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| | - Jörn Piel
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| |
Collapse
|
43
|
Abstract
Microbes produce a huge array of secondary metabolites endowed with important ecological functions. These molecules, which can be catalogued as natural products, have long been exploited in medical fields as antibiotics, anticancer and anti-infective agents. Recent years have seen considerable advances in elucidating natural-product biosynthesis and many drugs used today are natural products or natural-product derivatives. The major contribution to recent knowledge came from application of genomics to secondary metabolism and was facilitated by all relevant genes being organised in a contiguous DNA segment known as gene cluster. Clustering of genes regulating biosynthesis in bacteria is virtually universal. Modular gene clusters can be mixed and matched during evolution to generate structural diversity in natural products. Biosynthesis of many natural products requires the participation of complex molecular machines known as polyketide synthases and non-ribosomal peptide synthetases. Discovery of new evolutionary links between the polyketide synthase and fatty acid synthase pathways may help to understand the selective advantages that led to evolution of secondary-metabolite biosynthesis within bacteria. Secondary metabolites confer selective advantages, either as antibiotics or by providing a chemical language that allows communication among species, with other organisms and their environment. Herewith, we discuss these aspects focusing on the most clinically relevant bioactive molecules, the thiotemplated modular systems that include polyketide synthases, non-ribosomal peptide synthetases and fatty acid synthases. We begin by describing the evolutionary and physiological role of marine natural products, their structural/functional features, mechanisms of action and biosynthesis, then turn to genomic and metagenomic approaches, highlighting how the growing body of information on microbial natural products can be used to address fundamental problems in environmental evolution and biotechnology.
Collapse
|
44
|
Kim SK, Bommareddy A, VanWert AL. Pederin, Psymberin and the Structurally Related Mycalamides: Synthetic Aspects and Biological Activities. HANDBOOK OF ANTICANCER DRUGS FROM MARINE ORIGIN 2014. [PMCID: PMC7123710 DOI: 10.1007/978-3-319-07145-9_32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pederin, psymberin, and mycalamides are related members of a relatively new family of potent natural antiviral and antitumor compounds originally isolated from marine sponges in 1988. This natural family of chemicals is of great interest to medicinal chemists and biologists, stemming from its extremely low abundance in source organisms and strikingly potent biological activity. They have clearly emerged as promising new synthetic targets, and are the focus of quite an interdisciplinary approach to molecular characterization. In this chapter we review diverse synthetic approaches to this family of natural products that has been demonstrating remarkable biological activity. We discuss relevant history, biological origins with the latest information on source organisms and their hosts, in-depth synthetic approaches, and biological data supporting their potential as therapeutic compounds.
Collapse
Affiliation(s)
- Se-Kwon Kim
- grid.412576.30000000107198994Department of Marine-Bio Convergence Science, Pukyong National University, Busan, Korea, Republic of (South Korea)
| | | | | |
Collapse
|
45
|
Bhandari DR, Schott M, Römpp A, Vilcinskas A, Spengler B. Metabolite localization by atmospheric pressure high-resolution scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging in whole-body sections and individual organs of the rove beetle Paederus riparius. Anal Bioanal Chem 2014; 407:2189-201. [PMID: 25424178 PMCID: PMC4357651 DOI: 10.1007/s00216-014-8327-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/04/2014] [Accepted: 11/06/2014] [Indexed: 11/25/2022]
Abstract
Mass spectrometry imaging provides for non-targeted, label-free chemical imaging. In this study, atmospheric pressure high-resolution scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging (AP-SMALDI MSI) was used for the first time to describe the chemical distribution of the defensive compounds pederin, pseudopederin, and pederon in tissue sections (16 μm thick) of the rove beetle Paederus riparius. The whole-insect tissue section was scanned with a 20-μm step size. Mass resolution of the orbital trapping mass spectrometer was set to 100,000 at m/z 200. Additionally, organ-specific compounds were identified for brain, nerve cord, eggs, gut, ovaries, and malpighian tubules. To confirm the distribution of the specific compounds, individual organs from the insect were dissected, and MSI experiments were performed on the dissected organs. Three ganglia of the nerve cord, with a dimension of 250–500 μm, were measured with 10-μm spatial resolution. High-quality m/z images, based on high spatial resolution and high mass accuracy were generated. These features helped to assign mass spectral peaks with high confidence. Mass accuracy of the imaging experiments was <3 ppm root mean square error, and mapping of different compound classes from a single experiment was possible. This approach improved the understanding of the biochemistry of P. riparius. Concentration differences and distributions of pederin and its analogues could be visualized in the whole-insect section. Without any labeling, we assigned key lipids for specific organs to describe their location in the body and to identify morphological structures with a specificity higher than with staining or immunohistology methods.
Collapse
Affiliation(s)
- Dhaka Ram Bhandari
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
| | - Matthias Schott
- Institute of Phytopathology and Applied Zoology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Andreas Römpp
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
| | - Andreas Vilcinskas
- Institute of Phytopathology and Applied Zoology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Bernhard Spengler
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
| |
Collapse
|
46
|
Abstract
This review covers the literature published in 2012 for marine natural products, with 1035 citations (673 for the period January to December 2012) 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 (1241 for 2012), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
Collapse
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | | | | | | | | |
Collapse
|
47
|
Li M, Luo B, Liu Q, Hu Y, Ganesan A, Huang P, Wen S. Synthesis of N-Acyl-N,O-acetals Mediated by Titanium Ethoxide. Org Lett 2013; 16:10-3. [DOI: 10.1021/ol4031155] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Min Li
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Bingling Luo
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Qi Liu
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yumin Hu
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
| | - A. Ganesan
- School
of Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kindgom
| | - Peng Huang
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
| | - Shijun Wen
- Sun Yat-sen University Cancer Center, State
Key Laboratory of Oncology in South China, Collaborative Innovation
Center for Cancer Medicine, Guangzhou 510060, China
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| |
Collapse
|
48
|
Pal A, Peng Z, Schuber PT, Bhanu Prasad BA, Bornmann WG. Asymmetric Synthesis of the C1-C6 Portion of the Psymberin Using an Evans Chiral Auxiliary. Tetrahedron Lett 2013; 54:5555-5567. [PMID: 25110364 PMCID: PMC4124943 DOI: 10.1016/j.tetlet.2013.05.153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The C1-C6 region of the potent cytotoxic agent psymberin has been synthesized. The key transformations of the synthesis are an auxiliary-controlled addition of a Sn(II)-glycolate enolate to an aldehyde to yield the anti aldol product and transforming the primary alcohol into a terminal olefin utilizing organoselenium chemistry.
Collapse
Affiliation(s)
- Ashutosh Pal
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Zhenghong Peng
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Paul T. Schuber
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Basvoju A. Bhanu Prasad
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - William G. Bornmann
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| |
Collapse
|
49
|
Bielitza M, Pietruszka J. Psymberin - biologische Eigenschaften und Ansätze zu Total- und Analogasynthesen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
50
|
Bielitza M, Pietruszka J. The psymberin story--biological properties and approaches towards total and analogue syntheses. Angew Chem Int Ed Engl 2013; 52:10960-85. [PMID: 24105772 DOI: 10.1002/anie.201301259] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Indexed: 11/06/2022]
Abstract
Psymberin is a marine natural product which has attracted a great deal of interest since its isolation: While the highly cytotoxic compound was detected early on as an ingredient in a marine sponge, it took over a decade and 600 additional samples for the structure to eventually be assigned. In the last eight years fascinating synthetic and biosynthetic investigations have led to a more detailed understanding as well as a new starting point for structure-activity studies towards new antitumor compounds. The Review gives an in-depth insight into the progress in the field of the marine polyketide psymberin and demonstrates how organic synthesis is influencing neighboring scientific subjects.
Collapse
Affiliation(s)
- Max Bielitza
- Institut für Bioorganische Chemie der Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426 Jülich (Germany) http://www.iboc.uni-duesseldorf.de.
| | | |
Collapse
|