1
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Shen SM, Yu DD, Ke LM, Yao LG, Su MZ, Guo YW. Polyoxygenated cembrane-type diterpenes from the Hainan soft coral Lobophytum crassum as a promising source of anticancer agents with ErbB3 and ROR1 inhibitory potential. Acta Pharmacol Sin 2024:10.1038/s41401-024-01347-z. [PMID: 39075227 DOI: 10.1038/s41401-024-01347-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 06/28/2024] [Indexed: 07/31/2024] Open
Abstract
A detailed chemical investigation of the Hainan soft coral Lobophytum crassum led to the identification of a class of polyoxygenated cembrane-type macrocyclic diterpenes (1-28), including three new flexible cembranoids, lobophycrasins E-G (2-4), and twenty-five known analogues. Their structures were elucidated by combining extensive spectroscopic data analysis, quantum mechanical-nuclear magnetic resonance (QM-NMR) methods, the modified Mosher's method, X-ray diffraction analysis, and comparison with data reported in the literature. Bioassays revealed that sixteen cembranoids inhibited the proliferation of H1975, MDA-MB231, A549, and H1299 cells. Among them, Compounds 10, 17, and 20 exhibited significant antiproliferative activities with IC50 values of 1.92-8.82 μM, which are very similar to that of the positive control doxorubicin. Molecular mechanistic studies showed that the antitumour activity of Compound 10 was closely related to regulation of the ROR1 and ErbB3 signalling pathways. This study may provide insight into the discovery and utilization of marine macrocyclic cembranoids as lead compounds for anticancer drugs.
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Affiliation(s)
- Shou-Mao Shen
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China
- School of Pharmacy, Yancheng Teachers University, Yancheng, 224002, China
| | - Dan-Dan Yu
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China
| | - Lin-Mao Ke
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China
| | - Li-Gong Yao
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China
| | - Ming-Zhi Su
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China.
| | - Yue-Wei Guo
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, 264117, China.
- School of Medicine, Shanghai University, Shanghai, 200444, China.
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2
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Kumar P, Wallis M, Zhou X, Li F, Holland DC, Reddell P, Münch G, Raju R. Triplinones A-H: Anti-Inflammatory Arylalkenyl α,β-Unsaturated-δ-Lactones Isolated from the Leaves of Australian Rainforest Plant Cryptocarya triplinervis (Lauraceae). JOURNAL OF NATURAL PRODUCTS 2024; 87:1817-1825. [PMID: 38964296 DOI: 10.1021/acs.jnatprod.4c00454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Our ongoing exploration of Australian rainforest plants for the biodiscovery of anti-inflammatory agents led to the isolation and structural elucidation of eight new arylalkenyl α,β-unsaturated-δ-lactones, triplinones A-H (1-8), from the leaves of the Australian rainforest plant Cryptocarya triplinervis B. Hyland (Lauraceae). The chemical structures of these compounds were established by NMR spectroscopic data analysis, while their relative and absolute configurations were established using a combination of Mosher ester analysis utilizing both Riguera's and Kishi's methods, ECD experiments, and X-ray crystallography analysis. Compounds 1-8 exhibited good inhibitory activities toward nitric oxide (NO) production in lipopolysaccharide (LPS) and interferon (IFN)-γ induced RAW 264.7 macrophages, in particular compounds 1-3 and 5, with IC50 values of 7.3 ± 0.5, 6.0 ± 0.3, 5.6 ± 0.3, and 5.4 ± 2.5 μM, respectively.
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Affiliation(s)
- Paayal Kumar
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
| | - Matthew Wallis
- School of Science, Western Sydney University, Penrith, Sydney, NSW 2751, Australia
| | - Xian Zhou
- NICM Health Research Institute, Western Sydney University, Westmead, NSW 2145, Australia
| | - Feng Li
- School of Science, Western Sydney University, Penrith, Sydney, NSW 2751, Australia
| | - Darren C Holland
- School of Molecular Sciences, University of Western Australia, Perth, WA 6009, Australia
| | - Paul Reddell
- QBiotics Ltd, PO Box 1, Yungaburra, Queensland 4066, Australia
| | - Gerald Münch
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
- NICM Health Research Institute, Western Sydney University, Westmead, NSW 2145, Australia
| | - Ritesh Raju
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
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3
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Yun EJ, Lee SH, Kim S, Ryu HS, Kim KH. Catabolism of 2-keto-3-deoxy-galactonate and the production of its enantiomers. Appl Microbiol Biotechnol 2024; 108:403. [PMID: 38954014 PMCID: PMC11219438 DOI: 10.1007/s00253-024-13235-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 07/04/2024]
Abstract
2-Keto-3-deoxy-galactonate (KDGal) serves as a pivotal metabolic intermediate within both the fungal D-galacturonate pathway, which is integral to pectin catabolism, and the bacterial DeLey-Doudoroff pathway for D-galactose catabolism. The presence of KDGal enantiomers, L-KDGal and D-KDGal, varies across these pathways. Fungal pathways generate L-KDGal through the reduction and dehydration of D-galacturonate, whereas bacterial pathways produce D-KDGal through the oxidation and dehydration of D-galactose. Two distinct catabolic routes further metabolize KDGal: a nonphosphorolytic pathway that employs aldolase and a phosphorolytic pathway involving kinase and aldolase. Recent findings have revealed that L-KDGal, identified in the bacterial catabolism of 3,6-anhydro-L-galactose, a major component of red seaweeds, is also catabolized by Escherichia coli, which is traditionally known to be catabolized by specific fungal species, such as Trichoderma reesei. Furthermore, the potential industrial applications of KDGal and its derivatives, such as pyruvate and D- and L-glyceraldehyde, are underscored by their significant biological functions. This review comprehensively outlines the catabolism of L-KDGal and D-KDGal across different biological systems, highlights stereospecific methods for discriminating between enantiomers, and explores industrial application prospects for producing KDGal enantiomers. KEY POINTS: • KDGal is a metabolic intermediate in fungal and bacterial pathways • Stereospecific enzymes can be used to identify the enantiomeric nature of KDGal • KDGal can be used to induce pectin catabolism or produce functional materials.
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Affiliation(s)
- Eun Ju Yun
- Division of Biotechnology, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Sun-Hee Lee
- Department of Biotechnology, Graduate School, Korea University, Seoul, 02841, Republic of Korea
| | - Subin Kim
- Division of Biotechnology, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Hae Seul Ryu
- Division of Biotechnology, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul, 02841, Republic of Korea.
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4
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Lai D, Gan G. Three previously undescribed nor-eremophilane sesquiterpenoids from the fungus Penicillium sp. L1 associated with basalt fibre. Nat Prod Res 2024:1-8. [PMID: 38885305 DOI: 10.1080/14786419.2024.2367237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/05/2024] [Indexed: 06/20/2024]
Abstract
Three new nor-eremophilane sesquiterpenoids, namely nor-eremophilanol A-C (1-3), along with two known eremophilanes (4-5), were isolated from the culture of the fungus Penicillium sp. L1 that was obtained from the surface of basalt fibre composite bars. The structures of the new compounds were elucidated by a combined analysis of the 1D, 2D NMR, and HRMS spectroscopic data, and the absolute configuration of 1 was determined by the modified Mosher's method. The biosynthetic pathway leading to the nor-eremophilanes were proposed with the oxidative cleavage of the double bond as a key step. Compound 1 displayed antibacterial activities against the tested pathogenic bacteria.
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Affiliation(s)
- Daohui Lai
- Guangxi Science & Technology Normal University, Laibin, Guangxi, P.R. China
| | - Guorong Gan
- Guangxi Science & Technology Normal University, Laibin, Guangxi, P.R. China
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5
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Osadchuk I, Luts HE, Zahharova A, Tamm T, Borovkov V. Controlling Chirogenic Effects in Porphyrin Based Supramolecular Systems: Theoretical Analysis Versus Experimental Observations. Chemphyschem 2024; 25:e202400104. [PMID: 38693766 DOI: 10.1002/cphc.202400104] [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: 01/31/2024] [Revised: 03/18/2024] [Indexed: 05/03/2024]
Abstract
Electronic circular dichroism (ECD) spectroscopy is a widely employed method for studying chiral analysis, requiring the presence of a chromophore close to a chiral centre. Porphyrinoids are found to be one of the best chromophoric systems serving for this purpose and enabling the application of ECD spectroscopy for chirality determination across diverse classes of organic compounds. Consequently, it is crucial to understand the induction mechanisms of ECD in the porphyrin-based complexes. The present study explores systematically the influence of secondary chromophores, bonded to an achiral zinc porphyrin or to chiral guest molecules, on the B-region of ECD spectra using the time-dependent density functional theory (TD-DFT) calculations. The study analyses the impact of change in both the conformation of achiral porphyrin (host) and change in position and conformation of chiral organic molecule (guest) on the B-band of ECD spectra (energy, intensity, sign of Cotton effect). Finally, conclusions made on model complexes are applied to published experimental data, contributing to a deeper understanding of various factors influencing ECD spectra in chiral systems. In addition, a computer program aimed to help rationalise ECD spectra by visualizing corresponding orbital energies, rotatory strengths, electric and magnetic transition moments, and angles between them, is presented.
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Affiliation(s)
- Irina Osadchuk
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Hanna-Eliisa Luts
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Aleksandra Zahharova
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Toomas Tamm
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
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6
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Du YE, Cui J, Cho E, Hwang S, Jang YJ, Oh KB, Nam SJ, Oh DC. Serratiomycins D1-D3, Antibacterial Cyclic Peptides from a Serratia sp. and Structure Revision of Serratiomycin. JOURNAL OF NATURAL PRODUCTS 2024; 87:1330-1337. [PMID: 38687892 DOI: 10.1021/acs.jnatprod.3c00993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Serratiomycin (1) is an antibacterial cyclic depsipeptide, first discovered from a Eubacterium culture in 1998. This compound was initially reported to contain l-Leu, l-Ser, l-allo-Thr, d-Phe, d-Ile, and hydroxydecanoic acid. In the present study, 1 and three new derivatives, serratiomycin D1-D3 (2-4), were isolated from a Serratia sp. strain isolated from the exoskeleton of a long-horned beetle. The planar structures of 1-4 were elucidated by using mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. Comparison of the NMR chemical shifts and the physicochemical data of 1 to those of previously reported serratiomycin indeed identified 1 as serratiomycin. The absolute configurations of the amino units in compounds 1-4 were determined by the advanced Marfey's method, 2,3,4,6-tetra-O-acetyl-β-d-glucopyranosyl isothiocyanate derivatization, and liquid chromatography-mass spectrometric (LC-MS) analysis. Additionally, methanolysis and the modified Mosher's method were used to determine the absolute configuration of (3R)-hydroxydecanoic acid in 1. Consequently, the revised structure of 1 was found to possess d-Leu, l-Ser, l-Thr, d-Phe, l-allo-Ile, and d-hydroxydecanoic acid. In comparison with the previously published structure of serratiomycin, l-Leu, l-allo-Thr, and d-Ile in serratiomycin were revised to d-Leu, l-Thr, and l-allo-Ile. The new members of the serratiomycin family, compounds 2 and 3, showed considerably higher antibacterial activities against Staphylococcus aureus and Salmonella enterica than compound 1.
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Affiliation(s)
- Young Eun Du
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jinsheng Cui
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eunji Cho
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Sunghoon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yong-Joon Jang
- Natura Academia Research Center, Seoul 08826, Republic of Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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7
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Wang W, Lee J, Roh E, Shetye G, Cao J, McAlpine J, Pauli G, Franzblau S, Vu THN, Quach NT, Oh E, Park KH, Park C, Cho Y, Jang H, Han S, Kim H, Cho S, Phi QT, Kang H. Cavomycins A-C, Linear Oligomer Depsipeptides from an Annelid-Associated Streptomyces cavourensis. JOURNAL OF NATURAL PRODUCTS 2024; 87:976-983. [PMID: 38438310 DOI: 10.1021/acs.jnatprod.3c01275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Three unique linear oligomeric depsipeptides, designated as cavomycins A-C (1-3), were identified from Streptomyces cavourensis, a gut bacterium associated with the annelid Paraleonnates uschakovi. The structures of these depsipeptides were determined through a combination of spectroscopic methods and chemical derivatization techniques, including methanolysis, the modified Mosher's method, advanced Marfey's methods, and phenylglycine methyl ester derivatization. The unique dipeptidyl residue arrangements in compounds 1-3 indicate that they are not degradation products of valinomycin. Compound 2 and its methylation derivative 2a exhibited antiproliferative activity against PANC-1 pancreatic cancer cells with IC50 values of 1.2 and 1.7 μM, respectively.
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Affiliation(s)
- Weihong Wang
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
- Research Institute of Oceanography, Seoul National University, Seoul 08826, Korea
| | - JunI Lee
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - Eun Roh
- Interdisciplinary Graduate Program in Genetic Engineering, Seoul National University, NS-80, Seoul 08826, Korea
| | | | | | | | | | | | - Thi Hanh Nguyen Vu
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Ngoc Tung Quach
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Eunseok Oh
- Research Institute of Oceanography, Seoul National University, Seoul 08826, Korea
| | - Kyu-Hyung Park
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - Chanyoon Park
- Interdisciplinary Graduate Program in Genetic Engineering, Seoul National University, NS-80, Seoul 08826, Korea
| | - Youbin Cho
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - Hyeseon Jang
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - SongJoo Han
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - Hiyoung Kim
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
| | | | - Quyet-Tien Phi
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Heonjoong Kang
- Laboratory of Marine Drugs, School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
- Research Institute of Oceanography, Seoul National University, Seoul 08826, Korea
- Interdisciplinary Graduate Program in Genetic Engineering, Seoul National University, NS-80, Seoul 08826, Korea
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8
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Sparaco R, Cinque P, Scognamiglio A, Corvino A, Caliendo G, Fiorino F, Magli E, Perissutti E, Santagada V, Severino B, Luciano P, Casertano M, Aiello A, Martins Viegas GY, De Nucci G, Frecentese F. 3-Nitroatenolol: First Synthesis, Chiral Resolution and Enantiomers' Absolute Configuration. Molecules 2024; 29:1598. [PMID: 38611877 PMCID: PMC11013601 DOI: 10.3390/molecules29071598] [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: 03/01/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
4-Nitro and 7-nitro propranolol have been recently synthesized and characterized by us. (±)-4-NO2-propranolol has been shown to act as a selective antagonist of 6-nitrodopamine (6-ND) receptors in the right atrium of rats. As part of our follow-up to this study, herein, we describe the first synthesis of (±)-3-nitroatenolol as a probe to evaluate the potential nitration of atenolol by endothelium. Chiral chromatography was used to produce pure enantiomers. By using Riguera's method, which is based on the sign distribution of ΔδH, the absolute configuration of the secondary alcohol was determined.
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Affiliation(s)
- Rosa Sparaco
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Pierfrancesco Cinque
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Antonia Scognamiglio
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Angela Corvino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Giuseppe Caliendo
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Ferdinando Fiorino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Elisa Magli
- Department of Public Health, University of Naples Federico II, Via Pansini 5, 80131 Naples, Italy;
| | - Elisa Perissutti
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Vincenzo Santagada
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Beatrice Severino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Paolo Luciano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Marcello Casertano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Anna Aiello
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
| | - Gustavo Yuri Martins Viegas
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas 13083-887, SP, Brazil;
- Department of Health Studies, Metropolitan University of Santos (UNIMES), Santos 11045-002, SP, Brazil
| | - Gilberto De Nucci
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas 13083-887, SP, Brazil;
- Department of Health Studies, Metropolitan University of Santos (UNIMES), Santos 11045-002, SP, Brazil
| | - Francesco Frecentese
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy; (R.S.); (P.C.); (A.S.); (A.C.); (G.C.); (F.F.); (E.P.); (V.S.); (B.S.); (P.L.); (M.C.); (A.A.); (F.F.)
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9
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Wang Y, Zhao H, Yang C, Fang L, Zheng L, Lv H, Stavropoulos P, Ai L, Zhang J. Chiral Recognition of Chiral (Hetero)Cyclic Derivatives Probed by Tetraaza Macrocyclic Chiral Solvating Agents via 1H NMR Spectroscopy. Anal Chem 2024; 96:5188-5194. [PMID: 38506628 DOI: 10.1021/acs.analchem.3c05395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
In the field of chiral recognition, chiral cyclic organic compounds, especially heterocyclic organic compounds, have attracted little attention and have been rarely studied as chiral substrates by means of 1H NMR spectroscopy. In this paper, enantiomers of thiohydantoin derivatives, representing typical five-membered N,N-heterocycles, have been synthesized and utilized for assignment of absolute configuration and analysis of enantiomeric excess. All enantiomers have been successfully differentiated with the assistance of novel tetraaza macrocyclic chiral solvating agents (TAMCSAs) by 1H NMR spectroscopy. Surprisingly, unprecedented nonequivalent chemical shift values (up to 2.052 ppm) of the NH proton of substrates have been observed, a new milestone in the evaluation of enantiomers. To better understand the intermolecular interactions between host and guest, Job plots and theoretical calculations of (S)-G1 and (R)-G1 with TAMCSA 1a were investigated and revealed significant geometric differentiation between the diastereomers. In order to evaluate practical applications of the present systems in analyzing optical purity of chiral substrates, enantiomeric excesses of a typical substrate (G1) with different optical compositions in the presence of a representative TAMCSA (1a) can be accurately calculated based on the integration of the NH proton's signal peaks. Importantly, this work provides a significant breakthrough in exploring and developing the chiral recognition of chiral heterocyclic organic compounds by 1H NMR spectroscopy.
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Affiliation(s)
- Yu Wang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hongmei Zhao
- State Key Laboratory of Information Photonics and Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China
| | - Chunxia Yang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Lixia Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Li Zheng
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hehua Lv
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Pericles Stavropoulos
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Lin Ai
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Jiaxin Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
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10
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Huynh TH, Kim HK, Lee J, Ban YH, Jang YJ, Heo BE, Nguyen TQ, An JS, Kwon Y, Nam SJ, Jang J, Oh KB, Shin MK, Oh DC. Retinestatin, a Polyol Polyketide from a Termite Nest-Derived Streptomyces sp. JOURNAL OF NATURAL PRODUCTS 2024; 87:591-599. [PMID: 38442389 DOI: 10.1021/acs.jnatprod.3c01043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
A new polyol polyketide, named retinestatin (1), was obtained and characterized from the culture of a Streptomyces strain, which was isolated from a subterranean nest of the termite Reticulitermes speratus kyushuensis Morimoto. The planar structure of 1 was elucidated on the basis of the cumulative analysis of ultraviolet, infrared, mass spectrometry, and nuclear magnetic resonance spectroscopic data. The absolute configuration of 1 at 12 chiral centers was successfully assigned by employing a J-based configuration analysis in combination with ROESY correlations, a quantum mechanics-based computational approach to calculate NMR chemical shifts, and a 3 min flash esterification by Mosher's reagents followed by NMR analysis. Biological evaluation of retinestatin (1) using an in vitro model of Parkinson's disease revealed that 1 protected SH-SY5Y dopaminergic cells from MPP+-induced cytotoxicity, indicating its neuroprotective effects.
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Affiliation(s)
- Thanh-Hau Huynh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hee Kyung Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jayho Lee
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeon Hee Ban
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yong-Joon Jang
- Natural Center of Life and Environment, Seoul 08826, Republic of Korea
| | - Bo Eun Heo
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Thanh Quang Nguyen
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yun Kwon
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jichan Jang
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Kyoo Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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11
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Zhao Y, Liang F, Xie Y, Duan YT, Andeadelli A, Pateraki I, Makris AM, Pomorski TG, Staerk D, Kampranis SC. Oxetane Ring Formation in Taxol Biosynthesis Is Catalyzed by a Bifunctional Cytochrome P450 Enzyme. J Am Chem Soc 2024; 146:801-810. [PMID: 38129385 DOI: 10.1021/jacs.3c10864] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Taxol is a potent drug used in various cancer treatments. Its complex structure has prompted extensive research into its biosynthesis. However, certain critical steps, such as the formation of the oxetane ring, which is essential for its activity, have remained unclear. Previous proposals suggested that oxetane formation follows the acetylation of taxadien-5α-ol. Here, we proposed that the oxetane ring is formed by cytochrome P450-mediated oxidation events that occur prior to C5 acetylation. To test this hypothesis, we analyzed the genomic and transcriptomic information for Taxus species to identify cytochrome P450 candidates and employed two independent systems, yeast (Saccharomyces cerevisiae) and plant (Nicotiana benthamiana), for their characterization. We revealed that a single enzyme, CYP725A4, catalyzes two successive epoxidation events, leading to the formation of the oxetane ring. We further showed that both taxa-4(5)-11(12)-diene (endotaxadiene) and taxa-4(20)-11(12)-diene (exotaxadiene) are precursors to the key intermediate, taxologenic oxetane, indicating the potential existence of multiple routes in the Taxol pathway. Thus, we unveiled a long-elusive step in Taxol biosynthesis.
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Affiliation(s)
- Yong Zhao
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Feiyan Liang
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Yuman Xie
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Yao-Tao Duan
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Aggeliki Andeadelli
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), Thessaloniki 57001, Greece
- Department of Food Science and Nutrition, University of the Aegean, Myrina 81100, Lemnos, Greece
| | - Irini Pateraki
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Antonios M Makris
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), Thessaloniki 57001, Greece
| | - Thomas G Pomorski
- Transport Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Sotirios C Kampranis
- Biochemical Engineering Group, Plant Biochemistry Section, Department of Plant and Environment Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
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12
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Yun EJ, Yu S, Kim DH, Park NJ, Liu JJ, Jin YS, Kim KH. Identification of the enantiomeric nature of 2-keto-3-deoxy-galactonate in the catabolic pathway of 3,6-anhydro-L-galactose. Appl Microbiol Biotechnol 2023; 107:7427-7438. [PMID: 37812254 DOI: 10.1007/s00253-023-12807-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/28/2023] [Accepted: 09/19/2023] [Indexed: 10/10/2023]
Abstract
A novel metabolic pathway of 3,6-anhydro-L-galactose (L-AHG), the main sugar component in red macroalgae, was first discovered in the marine bacterium Vibrio sp. EJY3. L-AHG is converted to 2-keto-3-deoxy-galactonate (KDGal) in two metabolic steps. Here, we identified the enantiomeric nature of KDGal in the L-AHG catabolic pathway via stereospecific enzymatic reactions accompanying the biosynthesis of enantiopure L-KDGal and D-KDGal. Enantiopure L-KDGal and D-KDGal were synthesized by enzymatic reactions derived from the fungal galacturonate and bacterial oxidative galactose pathways, respectively. KDGal, which is involved in the L-AHG pathway, was also prepared. The results obtained from the reactions with an L-KDGal aldolase, specifically acting on L-KDGal, showed that KDGal in the L-AHG pathway exists in an L-enantiomeric form. Notably, we demonstrated the utilization of L-KDGal by Escherichia coli for the first time. E. coli cannot utilize L-KDGal as the sole carbon source. However, when a mixture of L-KDGal and D-galacturonate was used, E. coli utilized both. Our study suggests a stereoselective method to determine the absolute configuration of a compound. In addition, our results can be used to explore the novel L-KDGal catabolic pathway in E. coli and to construct an engineered microbial platform that assimilates L-AHG or L-KDGal as substrates. KEY POINTS: • Stereospecific enzyme reactions were used to identify enantiomeric nature of KDGal • KDGal in the L-AHG catabolic pathway exists in an L-enantiomeric form • E. coli can utilize L-KDGal as a carbon source when supplied with D-galacturonate.
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Affiliation(s)
- Eun Ju Yun
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Sora Yu
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Dong Hyun Kim
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Na Jung Park
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Jing-Jing Liu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yong-Su Jin
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
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13
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Hu G, Qiu M. Machine learning-assisted structure annotation of natural products based on MS and NMR data. Nat Prod Rep 2023; 40:1735-1753. [PMID: 37519196 DOI: 10.1039/d3np00025g] [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: 08/01/2023]
Abstract
Covering: up to March 2023Machine learning (ML) has emerged as a popular tool for analyzing the structures of natural products (NPs). This review presents a summary of the recent advancements in ML-assisted mass spectrometry (MS) and nuclear magnetic resonance (NMR) data analysis to establish the chemical structures of NPs. First, ML-based MS/MS analyses that rely on library matching are discussed, which involves the utilization of ML algorithms to calculate similarity, predict the MS/MS fragments, and form molecular fingerprint. Then, ML assisted MS/MS structural annotation without library matching is reviewed. Furthermore, the cases of ML algorithms in assisting structural studies of NPs based on NMR are discussed from four perspectives: NMR prediction, functional group identification, structural categorization and quantum chemical calculation. Finally, the review concludes with a discussion of the challenges and the trends associated with the structural establishment of NPs based on ML algorithms.
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Affiliation(s)
- Guilin Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China.
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Minghua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China.
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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14
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Silkenath B, Kläge D, Altwein H, Schmidhäuser N, Mayer G, Hartig JS, Wittmann V. Phosphonate and Thiasugar Analogues of Glucosamine-6-phosphate: Activation of the glmS Riboswitch and Antibiotic Activity. ACS Chem Biol 2023; 18:2324-2334. [PMID: 37793187 PMCID: PMC10594590 DOI: 10.1021/acschembio.3c00452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/19/2023] [Indexed: 10/06/2023]
Abstract
The glmS riboswitch is a motif found in 5'-untranslated regions of bacterial mRNA that controls the synthesis of glucosamine-6-phosphate (GlcN6P), an essential building block for the bacterial cell wall, by a feedback mechanism. Activation of the glmS riboswitch by GlcN6P mimics interferes with the ability of bacteria to synthesize its cell wall. Accordingly, GlcN6P mimics acting as glmS activators are promising candidates for future antibiotic drugs that may overcome emerging bacterial resistance against established antibiotics. We describe the synthesis of a series of phosphonate mimics of GlcN6P as well as the thiasugar analogue of GlcN6P. The phosphonate mimics differ in their pKa value to answer the question of whether derivatives with a pKa matching that of GlcN6P would be efficient glmS activators. We found that all derivatives activate the riboswitch, however, less efficiently than GlcN6P. This observation can be explained by the missing hydrogen bonds in the case of phosphonates and is valuable information for the design of future GlcN6P mimics. The thiasugar analogue of GlcN6P on the other hand turned out to be a glmS riboswitch activator with the same activity as the natural metabolite GlcN6P. The nonphosphorylated thiasugar displayed antimicrobial activity against certain bacilli. Therefore, the compound is a promising lead structure for the development of future antibiotics with a potentially novel mode of action.
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Affiliation(s)
- Bjarne Silkenath
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Dennis Kläge
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Hanna Altwein
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Nina Schmidhäuser
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Günter Mayer
- LIMES
Institute, Center for Aptamer Research & Development, University of Bonn, 53121 Bonn, Germany
| | - Jörg S. Hartig
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Valentin Wittmann
- Department
of Chemistry, University of Konstanz, 78457 Konstanz, Germany
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15
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Osadchuk I, Luts HE, Norvaiša K, Borovkov V, Senge MO. Supramolecular Chirogenesis in a Sterically Hindered Porphyrin: A Critical Theoretical Analysis. Chemistry 2023; 29:e202301408. [PMID: 37227167 DOI: 10.1002/chem.202301408] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 05/26/2023]
Abstract
The determination of molecular stereochemistry and absolute configuration is an important part of modern chemistry, pharmacology, and biology. Electronic circular dichroism (ECD) spectroscopy is a widely used tool for chirality assignment, especially with porphyrin macrocycles employed as reporter chromophores. However, the mechanisms of induced ECD in porphyrin complexes are yet to be comprehensively rationalized. In this work, the ECD spectra of a sterically hindered hexa-cationic porphyrin with two camphorsulfonic acids in dichloromethane and chloroform were experimentally measured and computationally analyzed. The influence of geometric factors such as the position of chiral guest molecules, distortion of the porphyrin macrocycle, and orientation of aromatic and non-aromatic peripheral substituents on the ECD spectra was theoretically studied. Various potential pitfalls, such as a lack of significant conformations and accidental agreement of experimental and simulated spectra, are considered and discussed.
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Affiliation(s)
- Irina Osadchuk
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Hanna-Eliisa Luts
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Karolis Norvaiša
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Mathias O Senge
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
- Institute for Advanced Study (TUM-IAS), Technical University of Munich, Lichtenberg Str. 2a, 85748, Garching, Germany
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16
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Yu G, Ge X, Wang Y, Mo X, Yu H, Tan L, Yang S. Discovery of Novel Terpenoids from the Basidiomycete Pleurotus ostreatus through Genome Mining and Coculture Optimization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37441728 DOI: 10.1021/acs.jafc.3c03276] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/15/2023]
Abstract
In our previous work, postredienes A-C, three unusual linear sesterterpenes with high antifungal activities, were isolated from Pleurotus ostreatus SY10 when cocultured with Trametes robiniophila SY636. However, their titers were low, and exploration of newly biosynthesized trace analogues is required. Herein, genome mining analysis predicted that 17 gene clusters are involved in terpenoid biosynthesis in P. ostreatus. Thus, coculture conditions for strains SY10 and SY636 were optimized using a single-factor test and Box-Behnken design. As a result, the titers of postredienes A-C were increased by over 2.5-fold, reaching 1.28 to 8.40 mg/L. Moreover, five new terpenoids, named postredienes D-H (1-5), were successfully isolated. Compound 1 exhibited activities against the human pathogenic fungi Candida albicans and Cryptococcus neoformans comparable to those of amphotericin B. Compound 2 represents a novel sesterterpene with a five-membered ring at C-7. The absolute configurations of 1-5 were elucidated by making the methoxyphenylacetic acid esters and acetonide derivatives, combined with ECD and NMR calculation. Two potential gene clusters and relevant biosynthetic pathways for 1-5 were subsequently proposed based on real-time reverse transcription-quantitative PCR (RT-qPCR) analysis. The current study provides new insights into the research of terpenoid biosynthesis genes in P. ostreatus and other basidiomycetes.
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Affiliation(s)
- Guihong Yu
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Xiaoxuan Ge
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Yu Wang
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Xuhua Mo
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Hao Yu
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Lingling Tan
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
| | - Song Yang
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People's Republic of China
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17
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Kil YS, You J, Wendt KL, King JB, Cichewicz RH. Resolving a Natural Product Cold Case: Elucidation of Fusapyrone Structure and Absolute Configuration and Demonstration of Their Fungal Biofilm Disrupting Properties. J Org Chem 2023; 88:9167-9186. [PMID: 37343240 DOI: 10.1021/acs.joc.3c00765] [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: 06/23/2023]
Abstract
Fusapyrones are fungal metabolites, which have been reported to have broad-spectrum antibacterial and antifungal properties. Despite the first members of this chemical class being described three decades prior, many aspects of their structures have remained unresolved, thereby constraining efforts to fully understand structure-activity relationships within this metabolite family and impeding the design of streamlined syntheses. Among the main challenges posed by fusapyrones is the incorporation of several single and groups of stereocenters separated by atoms with freely rotating bonds, which have proven unyielding to spectroscopic analyses. In this study, we obtained a series of new (2-5 and 7-9) and previously reported fusapyrones (1 and 6), which were subjected to a combination of spectroscopic, chemical, and computational techniques enabling us to offer proposals for their full structures, as well as provide a pathway to reinterpreting the absolute configurations of other published fusapyrone metabolites. Biological testing of the fusapyrones revealed their abilities to inhibit and disrupt biofilms made by the human fungal pathogen, Candida albicans. These results show that fusapyrones reduce hyphae formation in C. albicans, as well as decrease the surface adherence capabilities of planktonic cells and cells transitioning into early-stage biofilm formation.
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Affiliation(s)
- Yun-Seo Kil
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry & Biochemistry, Stephenson Life Science Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Jianlan You
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry & Biochemistry, Stephenson Life Science Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Karen L Wendt
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry & Biochemistry, Stephenson Life Science Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Jarrod B King
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry & Biochemistry, Stephenson Life Science Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Robert H Cichewicz
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry & Biochemistry, Stephenson Life Science Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
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18
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Silchenko AS, Kalinovsky AI, Avilov SA, Popov RS, Dmitrenok PS, Chingizova EA, Menchinskaya ES, Panina EG, Stepanov VG, Kalinin VI, Stonik VA. Djakonoviosides A, A 1, A 2, B 1-B 4 - Triterpene Monosulfated Tetra- and Pentaosides from the Sea Cucumber Cucumaria djakonovi: The First Finding of a Hemiketal Fragment in the Aglycones; Activity against Human Breast Cancer Cell Lines. Int J Mol Sci 2023; 24:11128. [PMID: 37446305 DOI: 10.3390/ijms241311128] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Seven new monosulfated triterpene glycosides, djakonoviosides A (1), A1 (2), A2 (3), and B1-B4 (4-7), along with three known glycosides found earlier in the other Cucumaria species, namely okhotoside A1-1, cucumarioside A0-1, and frondoside D, have been isolated from the far eastern sea cucumber Cucumaria djakonovi (Cucumariidae, Dendrochirotida). The structures were established on the basis of extensive analysis of 1D and 2D NMR spectra and confirmed by HR-ESI-MS data. The compounds of groups A and B differ from each other in their carbohydrate chains, namely monosulfated tetrasaccharide chains are inherent to group A and pentasaccharide chains with one sulfate group, branched by C-2 Qui2, are characteristic of group B. The aglycones of djakonoviosides A2 (3), B2 (5), and B4 (7) are characterized by a unique structural feature, a 23,16-hemiketal fragment found first in the sea cucumbers' glycosides. The biosynthetic pathway of its formation is discussed. The set of aglycones of C. djakonovi glycosides was species specific because of the presence of new aglycones. At the same time, the finding in C. djakonovi of the known glycosides isolated earlier from the other species of Cucumaria, as well as the set of carbohydrate chains characteristic of the glycosides of all investigated representatives of the genus Cucumaria, demonstrated the significance of these glycosides as chemotaxonomic markers. The membranolytic actions of compounds 1-7 and known glycosides okhotoside A1-1, cucumarioside A0-1, and frondoside D, isolated from C. djakonovi against human cell lines, including erythrocytes and breast cancer cells (MCF-7, T-47D, and triple negative MDA-MB-231), as well as leukemia HL-60 and the embryonic kidney HEK-293 cell line, have been studied. Okhotoside A1-1 was the most active compound from the series because of the presence of a tetrasaccharide linear chain and holostane aglycone with a 7(8)-double bond and 16β-O-acetoxy group, cucumarioside A0-1, having the same aglycone, was slightly less active because of the presence of branching xylose residue at C-2 Qui2. Generally, the activity of the djakonoviosides of group A was higher than that of the djakonoviosides of group B containing the same aglycones, indicating the significance of a linear chain containing four monosaccharide residues for the demonstration of membranolytic action by the glycosides. All the compounds containing hemiketal fragments, djakonovioside A2 (3), B2 (5), and B4 (7), were almost inactive. The most aggressive triple-negative MDA-MB-231 breast cancer cell line was the most sensitive to the glycosides action when compared with the other cancer cells. Okhotoside A1-1 and cucumarioside A0-1 demonstrated promising effects against MDA-MB-231 cells, significantly inhibiting the migration, as well as the formation and growth, of colonies.
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Affiliation(s)
- Alexandra S Silchenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Anatoly I Kalinovsky
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Sergey A Avilov
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Roman S Popov
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Pavel S Dmitrenok
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Ekaterina A Chingizova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Ekaterina S Menchinskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Elena G Panina
- Kamchatka Branch of Pacific Institute of Geography, Far Eastern Branch of the Russian Academy of Sciences, Partizanskaya st. 6, 683000 Petropavlovsk-Kamchatsky, Russia
| | - Vadim G Stepanov
- Kamchatka Branch of Pacific Institute of Geography, Far Eastern Branch of the Russian Academy of Sciences, Partizanskaya st. 6, 683000 Petropavlovsk-Kamchatsky, Russia
| | - Vladimir I Kalinin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
| | - Valentin A Stonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Pr. 100-letya Vladivostoka 159, 690022 Vladivostok, Russia
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19
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De Biasi F, Hope MA, Avalos CE, Karthikeyan G, Casano G, Mishra A, Badoni S, Stevanato G, Kubicki DJ, Milani J, Ansermet JP, Rossini AJ, Lelli M, Ouari O, Emsley L. Optically Enhanced Solid-State 1H NMR Spectroscopy. J Am Chem Soc 2023. [PMID: 37366803 DOI: 10.1021/jacs.3c03937] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Low sensitivity is the primary limitation to extending nuclear magnetic resonance (NMR) techniques to more advanced chemical and structural studies. Photochemically induced dynamic nuclear polarization (photo-CIDNP) is an NMR hyperpolarization technique where light is used to excite a suitable donor-acceptor system, creating a spin-correlated radical pair whose evolution drives nuclear hyperpolarization. Systems that exhibit photo-CIDNP in solids are not common, and this effect has, up to now, only been observed for 13C and 15N nuclei. However, the low gyromagnetic ratio and natural abundance of these nuclei trap the local hyperpolarization in the vicinity of the chromophore and limit the utility for bulk hyperpolarization. Here, we report the first example of optically enhanced solid-state 1H NMR spectroscopy in the high-field regime. This is achieved via photo-CIDNP of a donor-chromophore-acceptor molecule in a frozen solution at 0.3 T and 85 K, where spontaneous spin diffusion among the abundant strongly coupled 1H nuclei relays polarization through the whole sample, yielding a 16-fold bulk 1H signal enhancement under continuous laser irradiation at 450 nm. These findings enable a new strategy for hyperpolarized NMR beyond the current limits of conventional microwave-driven DNP.
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Affiliation(s)
- Federico De Biasi
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Michael A Hope
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Claudia E Avalos
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Ganesan Karthikeyan
- Institute of Radical Chemistry, Aix-Marseille University, CNRS, ICR, 13013 Marseille, France
| | - Gilles Casano
- Institute of Radical Chemistry, Aix-Marseille University, CNRS, ICR, 13013 Marseille, France
| | - Aditya Mishra
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Saumya Badoni
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Gabriele Stevanato
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Dominik J Kubicki
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jonas Milani
- Institut de Physique, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jean-Philippe Ansermet
- Institut de Physique, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Aaron J Rossini
- U.S. Department of Energy, Ames Laboratory, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Moreno Lelli
- Magnetic Resonance Center (CERM) and Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino, Italy
- Consorzio Interuniversitario Risonanze Magnetiche delle Metalloproteine Paramagnetiche (CIRMMP), 50019 Sesto Fiorentino, Italy
| | - Olivier Ouari
- Institute of Radical Chemistry, Aix-Marseille University, CNRS, ICR, 13013 Marseille, France
| | - Lyndon Emsley
- Institut des Sciences et Ingenierie Chimiques, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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20
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Donahue MG, Crull E. ( R)-(+)-3,5-Dinitro- N-(1-phenylethyl)benzothioamide. MOLBANK 2023; 2023:M1650. [PMID: 38274708 PMCID: PMC10810360 DOI: 10.3390/m1650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024] Open
Abstract
(R)-(+)-3,5-dinitro-N-(1-phenylethyl)benzothioamide 1 is a potential chiral solvating agent (CSA) for the spectral resolution of enantiomers via 1H NMR spectroscopy. The single enantiomer of 1 was synthesized from commercially available (R)-(+)-a-methylbenzylamine 2 in two steps with 85% yield.
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Affiliation(s)
- Matthew G. Donahue
- Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS 39406, USA
| | - Emily Crull
- Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS 39406, USA
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21
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Liang J, Xu Z, Wu J, Zhao Y. Tailoring the Recognition Property of a 19F-Labeled Gallium-Based NMR Probe: The Influence of the Metal Center. Anal Chem 2023; 95:7569-7574. [PMID: 37129497 DOI: 10.1021/acs.analchem.3c00049] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Chirality is a fundamental property of nature and an essential element of the life process. As the biological activities, metabolic pathways, and toxicity of individual enantiomers are often varied, methods to rapidly and accurately discriminate chiral analytes are in great demand. Here, we report a 19F-labeled gallium-based probe for the enantiodifferentiation of chiral monoamines, diamines, amino alcohols, amino acids, and N-heterocycles. A comparison between the new gallium-based probe and the previously developed aluminum aminotrisphenolate complex was performed. It was revealed that the gallium metal center displays a much stronger affinity toward the amino group compared to the hydroxy group, thereby producing simplified 19F NMR signals for analytes with multiple Lewis basic sites. For sterically bulky analyte, the replacement of the aluminum with gallium is envisioned to expand the binding pocket of the probe to allow different binding models to interconvert rapidly. This feature is important to the creation of easily interpretable 19F signals corresponding to each enantiomer. It is further demonstrated that the gallium-based probe is suitable for the assessment of the enantiomeric excess values of the crude products obtained in asymmetric reactions without the need for purification.
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Affiliation(s)
- Jinhua Liang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Zhenchuang Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Jian Wu
- Instrumental Analysis Center, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yanchuan Zhao
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
- Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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22
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Velado M, Martinović M, Alonso I, Tortosa M, Fernández de la Pradilla R, Viso A. Base-Induced Sulfoxide-Sulfenate Rearrangement of 2-Sulfinyl Dienes for the Regio- and Stereoselective Synthesis of Enantioenriched Dienyl Diols. J Org Chem 2023; 88:3697-3713. [PMID: 36868575 PMCID: PMC10028699 DOI: 10.1021/acs.joc.2c02931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
The base-induced [2,3]-sigmatropic rearrangement of a series of enantiopure 2-sulfinyl dienes has been examined and optimized using a combination of NaH and iPrOH. The reaction takes place by allylic deprotonation of the 2-sulfinyl diene to give a bis-allylic sulfoxide anion intermediate that after protonation undergoes sulfoxide-sulfenate rearrangement. Different substitution at the starting 2-sulfinyl dienes has allowed us to study the rearrangement finding that a terminal allylic alcohol is determinant to achieve complete regioselectivity and high enantioselectivities (90:10-95:5) with the sulfoxide as the only element of stereocontrol. Density functional theory (DFT) calculations provide an interpretation of these results.
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Affiliation(s)
- Marina Velado
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Manuel Martinović
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Inés Alonso
- Organic Chemistry Department and Center for Innovation in Advanced Chemistry (ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Mariola Tortosa
- Organic Chemistry Department and Center for Innovation in Advanced Chemistry (ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | | | - Alma Viso
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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23
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Dobšíková K, Michal P, Spálovská D, Kuchař M, Paškanová N, Jurok R, Kapitán J, Setnička V. Conformational analysis of amphetamine and methamphetamine: a comprehensive approach by vibrational and chiroptical spectroscopy. Analyst 2023; 148:1337-1348. [PMID: 36857656 DOI: 10.1039/d2an02014a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
After cannabis, the most commonly used illicit substance worldwide is amphetamine and its derivatives, such as methamphetamine, with an ever-increasing number of synthetic modifications. Thus, fast and reliable methods are needed to identify them according to their spectral patterns and structures. Here, we have investigated the use of molecular spectroscopy methods to describe the 3D structures of these substances in a solution that models the physiological environment. The substances were analyzed by Raman and infrared (IR) absorption spectroscopy and by chiroptical methods, vibrational circular dichroism (VCD) and Raman optical activity (ROA). The obtained experimental data were supported by three different computational approaches based on density functional theory (DFT) and molecular dynamics (MD). Successful interpretation relies on good agreement between experimental and predicted spectra. The determination of the conformer populations of the studied molecules was based on maximizing the similarity overlap of weighted conformer spectra by a global minimization algorithm. Very good agreement was obtained between the experimental spectra and optimized-population weighted spectra from MD, providing a detailed insight into the structure of the molecules and their interaction with the solvent. The relative population of three amphetamine and six methamphetamine conformers was determined and is consistent with a previous NMR study. However, this work shows that only a few isolated conformers are not sufficient for the successful interpretation of the spectra, but the entire conformational space needs to be sampled appropriately and explicit interaction with the solvent needs to be included.
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Affiliation(s)
- Kristýna Dobšíková
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
| | - Pavel Michal
- Department of Optics, Palacký University Olomouc, Olomouc, 771 46, Czech Republic.
| | - Dita Spálovská
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,National Institute of Mental Health, Klecany 250 67, Czech Republic
| | - Natalie Paškanová
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
| | - Radek Jurok
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Organic Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
| | - Josef Kapitán
- Department of Optics, Palacký University Olomouc, Olomouc, 771 46, Czech Republic.
| | - Vladimír Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
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24
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Li Z, Xu B, Kojasoy V, Ortega T, Adpressa DA, Ning W, Wei X, Liu J, Tantillo DJ, Loesgen S, Rudolf JD. First trans-eunicellane terpene synthase in bacteria. Chem 2023; 9:698-708. [PMID: 36937101 PMCID: PMC10022577 DOI: 10.1016/j.chempr.2022.12.006] [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] [Indexed: 01/03/2023]
Abstract
Terpenoids are the largest family of natural products, but prokaryotes are vastly underrepresented in this chemical space. However, genomics supports vast untapped biosynthetic potential for terpenoids in bacteria. We discovered the first trans-eunicellane terpene synthase (TS), AlbS from Streptomyces albireticuli NRRL B-1670, in nature. Mutagenesis, deuterium labeling studies, and quantum chemical calculations provided extensive support for its cyclization mechanism. In addition, parallel stereospecific labeling studies with Bnd4, a cis-eunicellane TS, revealed a key mechanistic distinction between these two enzymes. AlbS highlights bacteria as a valuable source of novel terpenoids, expands our understanding of the eunicellane family of natural products and the enzymes that biosynthesize them, and provides a model system to address fundamental questions about the chemistry of 6,10-bicyclic ring systems.
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Affiliation(s)
- Zining Li
- Department of Chemistry, University of Florida, Gainesville, FL, United States
| | - Baofu Xu
- Department of Chemistry, University of Florida, Gainesville, FL, United States
| | - Volga Kojasoy
- Department of Chemistry, University of California–Davis, Davis, CA, United States
| | - Teresa Ortega
- Department of Chemistry, University of California–Davis, Davis, CA, United States
| | | | - Wenbo Ning
- Department of Chemistry, University of Florida, Gainesville, FL, United States
| | - Xiuting Wei
- Department of Chemistry, University of Florida, Gainesville, FL, United States
| | - Jamin Liu
- Department of Chemistry, University of Florida, Gainesville, FL, United States
| | - Dean J. Tantillo
- Department of Chemistry, University of California–Davis, Davis, CA, United States
| | - Sandra Loesgen
- Department of Chemistry, University of Florida, Gainesville, FL, United States
- Whitney Laboratory for Marine Biosciences, University of Florida, St. Augustine, FL, United States
| | - Jeffrey D. Rudolf
- Department of Chemistry, University of Florida, Gainesville, FL, United States
- Lead contact
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25
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Zhao Y, Gericke O, Li T, Kjaerulff L, Kongstad KT, Heskes AM, Møller BL, Jørgensen FS, Venter H, Coriani S, Semple SJ, Staerk D. Polypharmacology-Labeled Molecular Networking: An Analytical Technology Workflow for Accelerated Identification of Multiple Bioactive Constituents in Complex Extracts. Anal Chem 2023; 95:4381-4389. [PMID: 36802535 DOI: 10.1021/acs.analchem.2c04859] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Discovery of sustainable and benign-by-design drugs to combat emerging health pandemics calls for new analytical technologies to explore the chemical and pharmacological properties of Nature's unique chemical space. Here, we present a new analytical technology workflow, polypharmacology-labeled molecular networking (PLMN), where merged positive and negative ionization tandem mass spectrometry-based molecular networking is linked with data from polypharmacological high-resolution inhibition profiling for easy and fast identification of individual bioactive constituents in complex extracts. The crude extract of Eremophila rugosa was subjected to PLMN analysis for the identification of antihyperglycemic and antibacterial constituents. Visually easy-interpretable polypharmacology scores and polypharmacology pie charts as well as microfractionation variation scores of each node in the molecular network provided direct information about each constituent's activity in the seven assays included in this proof-of-concept study. A total of 27 new non-canonical nerylneryl diphosphate-derived diterpenoids were identified. Serrulatane ferulate esters were shown to be associated with antihyperglycemic and antibacterial activities, including some showing synergistic activity with oxacillin in clinically relevant (epidemic) methicillin-resistant Staphylococcus aureus strains and some showing saddle-shaped binding to the active site of protein-tyrosine phosphatase 1B. PLMN is scalable in the number and types of assays included and thus holds potential for a paradigm shift toward polypharmacological natural-products-based drug discovery.
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Affiliation(s)
- Yong Zhao
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Oliver Gericke
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Tuo Li
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Louise Kjaerulff
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Allison Maree Heskes
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Birger Lindberg Møller
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Flemming Steen Jørgensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Henrietta Venter
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australian
| | - Sonia Coriani
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, Kgs. Lyngby DK-2800, Denmark
| | - Susan J Semple
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australian
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
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26
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Shah HS, Yuan J, Xie T, Yang Z, Chang C, Greenwell C, Zeng Q, Sun G, Read BN, Wilson TS, Valle HU, Kuang S, Wang J, Sekharan S, Bruhn JF. Absolute Configuration Determination of Chiral API Molecules by MicroED Analysis of Cocrystal Powders Formed Based on Cocrystal Propensity Prediction Calculations. Chemistry 2023; 29:e202203970. [PMID: 36744589 PMCID: PMC10089073 DOI: 10.1002/chem.202203970] [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: 12/20/2022] [Indexed: 02/07/2023]
Abstract
Establishing the absolute configuration of chiral active pharmaceutical ingredients (APIs) is of great importance. Single crystal X-ray diffraction (scXRD) has traditionally been the method of choice for such analysis, but scXRD requires the growth of large crystals, which can be challenging. Here, we present a method for determining absolute configuration that does not rely on the growth of large crystals. By examining microcrystals formed with chiral probes (small chiral compounds such as amino acids), absolute configuration can be unambiguously determined by microcrystal electron diffraction (MicroED). Our streamlined method employs three steps: (1) virtual screening to identify promising chiral probes, (2) experimental cocrystal screening and (3) structure determination by MicroED and absolute configuration assignment. We successfully applied this method to analyze two chiral API molecules currently on the market for which scXRD was not used to determine absolute configuration.
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Affiliation(s)
- Harsh S Shah
- J-STAR Research Inc., 6 Cedar Brook Dr, Cranbury, NJ 08512, USA
| | - Jiuchuang Yuan
- XtalPi Inc., Shenzhen Jingtai Technology Co., Ltd International Biomedical Innovation Park II 3F, No. 2 Hongliu Road, Futian District, Shenzhen, 518100, China
| | - Tian Xie
- J-STAR Research Inc., 6 Cedar Brook Dr, Cranbury, NJ 08512, USA
| | - Zhuocen Yang
- XtalPi Inc., Shenzhen Jingtai Technology Co., Ltd International Biomedical Innovation Park II 3F, No. 2 Hongliu Road, Futian District, Shenzhen, 518100, China
| | - Chao Chang
- XtalPi Inc., Shenzhen Jingtai Technology Co., Ltd International Biomedical Innovation Park II 3F, No. 2 Hongliu Road, Futian District, Shenzhen, 518100, China
| | | | - Qun Zeng
- XtalPi Inc., Shenzhen Jingtai Technology Co., Ltd International Biomedical Innovation Park II 3F, No. 2 Hongliu Road, Futian District, Shenzhen, 518100, China
| | - GuangXu Sun
- XtalPi Inc., Shenzhen Jingtai Technology Co., Ltd International Biomedical Innovation Park II 3F, No. 2 Hongliu Road, Futian District, Shenzhen, 518100, China
| | - Brandon N Read
- NanoImaging Services Inc., 4940 Carroll Canyon Road, Suite 115, San Diego, CA 92121, USA
| | - Timothy S Wilson
- NanoImaging Services Inc., 4940 Carroll Canyon Road, Suite 115, San Diego, CA 92121, USA
| | - Henry U Valle
- NanoImaging Services Inc., 4940 Carroll Canyon Road, Suite 115, San Diego, CA 92121, USA
| | - Shanming Kuang
- J-STAR Research Inc., 6 Cedar Brook Dr, Cranbury, NJ 08512, USA
| | - Jian Wang
- J-STAR Research Inc., 6 Cedar Brook Dr, Cranbury, NJ 08512, USA
| | | | - Jessica F Bruhn
- NanoImaging Services Inc., 4940 Carroll Canyon Road, Suite 115, San Diego, CA 92121, USA
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27
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Marinobazzanan, a Bazzanane-Type Sesquiterpenoid, Suppresses the Cell Motility and Tumorigenesis in Cancer Cells. Mar Drugs 2023; 21:md21030153. [PMID: 36976200 PMCID: PMC10056982 DOI: 10.3390/md21030153] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Marinobazzanan (1), a new bazzanane-type sesquiterpenoid, was isolated from a marine-derived fungus belonging to the genus Acremonium. The chemical structure of 1 was elucidated using NMR and mass spectroscopic data, while the relative configurations were established through the analysis of NOESY data. The absolute configurations of 1 were determined by the modified Mosher’s method as well as vibrational circular dichroism (VCD) spectra calculation and it was determined as 6R, 7R, 9R, and 10R. It was found that compound 1 was not cytotoxic to human cancer cells, including A549 (lung cancer), AGS (gastric cancer), and Caco-2 (colorectal cancer) below the concentration of 25 μM. However, compound 1 was shown to significantly decrease cancer-cell migration and invasion and soft-agar colony-formation ability at concentrations ranging from 1 to 5 μM by downregulating the expression level of KITENIN and upregulating the expression level of KAI1. Compound 1 suppressed β-catenin-mediated TOPFLASH activity and its downstream targets in AGS, A549, and Caco-2 and slightly suppressed the Notch signal pathway in three cancer cells. Furthermore, 1 also reduced the number of metastatic nodules in an intraperitoneal xenograft mouse model.
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28
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Hirao T, Kishino S, Haino T. Supramolecular chiral sensing by supramolecular helical polymers. Chem Commun (Camb) 2023; 59:2421-2424. [PMID: 36727639 DOI: 10.1039/d2cc06502a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A tetrakis(porphyrin) with branched side chains self-assembled to form supramolecular helical polymers both in solution and in the solid state. The helicity of the supramolecular polymers was determined by the chirality of solvent molecules, which permitted the polymer chains to be used in chiral sensing.
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Affiliation(s)
- Takehiro Hirao
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
| | - Sei Kishino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima 739-8526, Japan. .,International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
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29
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Im JH, Oh S, Bae ES, Um S, Lee SK, Ban YH, Oh DC. Discovery and structure elucidation of glycosyl and 5-hydroxy migrastatins from dung beetle gut Kitasatospora sp. J Ind Microbiol Biotechnol 2023; 50:kuad046. [PMID: 38093455 PMCID: PMC10750973 DOI: 10.1093/jimb/kuad046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 12/12/2023] [Indexed: 12/27/2023]
Abstract
Two new macrocyclic secondary metabolites, glycosyl-migrastatin (1) and 5-hydroxy-migrastatin (2), were isolated from a gut bacterium Kitasatospora sp. JL24 in dung beetle Onthophagus lenzii. Based on a comprehensive analysis of the nuclear magnetic resonance (NMR), MS, and UV spectroscopic data, the planar structures of 1 and 2 were successfully identified as new derivatives of migrastatin. Compound 1 was the first glycosylated member of the migrastatin family. The absolute configuration of the sugar moiety was determined to be d-glucose through the analysis of coupling constants and ROESY correlations, followed by chemical derivatization and chromatographic comparison with authentic d- and l-glucose. Compound 2, identified as 5-hydroxy-migrastatin possessing an additional hydroxy group with a previously unreported chiral center, was assigned using Mosher's method through 19F NMR chemical shifts and confirmed with the modified Mosher's method. Genomic analysis of Kitasatospora sp. strain JL24 revealed a putative biosynthetic pathway involving an acyltransferase-less type I polyketide synthase biosynthetic gene cluster. ONE-SENTENCE SUMMARY Two secondary metabolites, glycosyl-migrastatin (1) and 5-hydroxy-migrastatin (2), were discovered from the gut bacterium Kitasatospora sp. JL24 in the dung beetle Onthophagus lenzii.
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Affiliation(s)
- Ji Hyeon Im
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Seoyoung Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun Seo Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Soohyun Um
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeon Hee Ban
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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30
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Li Y, Zhao H, Ren Y, Qiu M, Zhang H, Gao G, Zheng L, Stavropoulos P, Ai L. Synthesis of Enantiomers of Chiral Ester Derivatives Containing an Amide Group and Their Chiral Recognition by
1
H NMR Spectroscopy. ChemistrySelect 2023. [DOI: 10.1002/slct.202204039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Yan‐Lin Li
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Hong‐Mei Zhao
- State Key Laboratory of Information Photonics and Communications, School of Science Beijing University of Posts and Telecommunications Beijing 100876 P. R. China
| | - Yu‐Qing Ren
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Meng Qiu
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Hai‐Tong Zhang
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Guang‐Peng Gao
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Li Zheng
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
| | - Pericles Stavropoulos
- Department of Chemistry Missouri University of Science and Technology Rolla, Missouri 65409 USA
| | - Lin Ai
- College of Chemistry Beijing Normal University Beijing 100875 P. R. China
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31
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Li H, Li Y, Jiao J, Lin C. Recent research progress on crystallization strategies for difficult-to-crystallize organic molecules. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
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32
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Absolute Stereochemistry Determination of Bioactive Marine-Derived Cyclopeptides by Liquid Chromatography Methods: An Update Review (2018-2022). MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020615. [PMID: 36677673 PMCID: PMC9867211 DOI: 10.3390/molecules28020615] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023]
Abstract
Cyclopeptides are considered as one of the most important classes of compounds derived from marine sources, due to their structural diversity and a myriad of their biological and pharmacological activities. Since marine-derived cyclopeptides consist of different amino acids, many of which are non-proteinogenic, they possess various stereogenic centers. In this respect, the structure elucidation of new molecular scaffolds obtained from natural sources, including marine-derived cyclopeptides, can become a very challenging task. The determination of the absolute configurations of the amino acid residues is accomplished, in most cases, by performing acidic hydrolysis, followed by analyses by liquid chromatography (LC). In a continuation with the authors' previous publication, and to analyze the current trends, the present review covers recently published works (from January 2018 to November 2022) regarding new cyclopeptides from marine organisms, with a special focus on their biological/pharmacological activities and the absolute stereochemical assignment of the amino acid residues. Ninety-one unreported marine-derived cyclopeptides were identified during this period, most of which displayed anticancer or antimicrobial activities. Marfey's method, which involves LC, was found to be the most frequently used for this purpose.
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Joyeux B, Gamet A, Casaretto N, Nay B. Asymmetric synthesis of a stereopentade fragment toward latrunculins. Beilstein J Org Chem 2023; 19:428-433. [PMID: 37091733 PMCID: PMC10113517 DOI: 10.3762/bjoc.19.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/27/2023] [Indexed: 04/25/2023] Open
Abstract
Latrunculins are marine toxins used in cell biology to block actin polymerization. The development of new synthetic strategies and methods for their synthesis is thus important in order to improve, modulate or control this biological value. The total syntheses found in the literature all target similar disconnections, especially an aldol strategy involving a recurrent 4-acetyl-1,3-thiazolidin-2-one ketone partner. Herein, we describe an alternative disconnection and subsequent stereoselective transformations to construct a stereopentade amenable to latrunculin and analogue synthesis, starting from (+)-β-citronellene. Key stereoselective transformations involve an asymmetric Krische allylation, an aldol reaction under 1,5-anti stereocontrol, and a Tishchenko-Evans reduction accompanied by a peculiar ester transposition, allowing to install key stereogenic centers of the natural products.
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Affiliation(s)
- Benjamin Joyeux
- Laboratoire de Synthèse Organique, Ecole Polytechnique, CNRS, ENSTA, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Antoine Gamet
- Laboratoire de Synthèse Organique, Ecole Polytechnique, CNRS, ENSTA, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Nicolas Casaretto
- Laboratoire de Chimie Moléculaire, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Bastien Nay
- Laboratoire de Synthèse Organique, Ecole Polytechnique, CNRS, ENSTA, Institut Polytechnique de Paris, 91128 Palaiseau, France
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Sparaco R, Scognamiglio A, Corvino A, Caliendo G, Fiorino F, Magli E, Perissutti E, Santagada V, Severino B, Luciano P, Casertano M, Aiello A, De Nucci G, Frecentese F. Synthesis, Chiral Resolution and Enantiomers Absolute Configuration of 4-Nitropropranolol and 7-Nitropropranolol. Molecules 2022; 28:molecules28010057. [PMID: 36615252 PMCID: PMC9822233 DOI: 10.3390/molecules28010057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/06/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
We recently identified 6-nitrodopamine and other nitro-catecholamines (6-nitrodopa, 6-nitroadrenaline), indicating that the endothelium has the ability to nitrate the classical catecholamines (dopamine, noradrenaline, and adrenaline). In order to investigate whether drugs could be subject to the same nitration process, we synthesized 4-nitro- and 7-nitropropranolol as probes to evaluate the possible nitration of the propranolol by the endothelium. The separation of the enantiomers in very high yields and excellent enantiopurity was achieved by chiral HPLC. Finally, we used Riguera's method to determine the absolute configuration of the enantiomers, through double derivatization with MPA and NMR studies.
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Affiliation(s)
- Rosa Sparaco
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Antonia Scognamiglio
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Angela Corvino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Giuseppe Caliendo
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Ferdinando Fiorino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Elisa Magli
- Department of Public Health, University of Naples Federico II, Via Pansini 5, 80131 Naples, Italy
| | - Elisa Perissutti
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Vincenzo Santagada
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Beatrice Severino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Paolo Luciano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Marcello Casertano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Anna Aiello
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Gilberto De Nucci
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas 13083-970, SP, Brazil
- Correspondence: ; Tel.: +55-19-991788879; Fax: +55-19-32521516
| | - Francesco Frecentese
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
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Resolution of Racemic Aryloxy-Propan-2-yl Acetates via Lipase-Catalyzed Hydrolysis: Preparation of Enantiomerically Pure/Enantioenriched Mexiletine Intermediates and Analogs. Catalysts 2022. [DOI: 10.3390/catal12121566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The lipase kinetic resolution (KR) of aryloxy-propan-2-yl acetates, via hydrolysis, produced enantiomerically pure/enantioenriched mexiletine intermediates and analogs. Racemic acetates rac-1-(2,6-dimethylphenoxy)propan-2-yl acetate (rac-5a), rac-1-(2,4-dimethylphenoxy)propan-2-yl acetate (rac-5b), rac-1-(o-tolyloxy)propan-2-yl acetate (rac-5c) and rac-1-(naphthalen-1-yloxy)propan-2-yl acetate (rac-5d) were used as substrates. A preliminary screening (24 h, phosphate buffer pH 7.0 with 20% acetonitrile as co-solvent, 30 °C and enzyme:substrate ratio of 2:1, m:m) was carried out with twelve lipases using acetate 5a as substrate. Two enzymes stood out in the KR of 5a, the Amano AK lipase from Pseudomonas fluorescens and lipase from Thermomyces lanuginosus (TLL) immobilized on Immobead 150. Under these conditions, both the (R)-1-(2,6-dimethylphenoxy)propan-2-ol [(R)-4a] and the remaining (S)-1-(2,6-dimethylphenoxy)propan-2-yl acetate [(S)-5a] were obtained with enantiomeric excess (ee) > 99%, 50% conversion and enantiomeric ratio (E) > 200. The KR study was expanded to racemic acetates 5b-d, leading to the corresponding chiral remaining acetates with ≥95% ee, and the alcohols 4b-d with ≥98% ee, and conversion values close to 50%. The best conditions for KRs of rac-5b-d involved the use of lipase from P. fluorescens or TLL immobilized on Immobead 150, 24 or 48 h and 30 °C. These intermediates had their absolute configurations determined using 1H NMR spectroscopy (Mosher’s method), showing that the KRs of these acetates obeyed the Kazlauskas’ rule. Molecular docking studies corroborated the experimental results, indicating a preference for the hydrolysis of (R)-5a-d.
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36
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Huang B, Xu L, Ying J, Zhao Y, Huang S. A novel in-situ strategy for enantiomeric discrimination and selective identification of multicomponent carboxylic acids in foods. Anal Chim Acta 2022; 1230:340402. [DOI: 10.1016/j.aca.2022.340402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 08/19/2022] [Accepted: 09/12/2022] [Indexed: 11/24/2022]
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37
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Patel AK, Joseph D, Atreya HS, Suryaprakash N. A One-Dimensional Phase-Modulated (PM) NMR Experiment for Differentiating Spin Systems in Small Molecules Mixtures: With Application to Chiral Discrimination and Bicomponent Organic Systems. Anal Chem 2022; 94:16555-16559. [PMID: 36036726 DOI: 10.1021/acs.analchem.2c00565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A one-dimensional phase-modulated NMR experiment, which distinguishes the partially resolved peaks and accelerates the data acquisition due to reduced dimensionality, is reported for differentiating spin systems, with application to chiral discrimination. The multifarious utility of the technique is demonstrated in plenteous examples.
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Affiliation(s)
- Arun Kumar Patel
- Solid State and Structural Chemistry Unit, NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - David Joseph
- Solid State and Structural Chemistry Unit, NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Hanudatta S Atreya
- Solid State and Structural Chemistry Unit, NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - N Suryaprakash
- Solid State and Structural Chemistry Unit, NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
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38
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Mesa JM, Comini MA, Dibello E, Gamenara D. Organocatalytic synthesis and anti‐trypanosomal activity evaluation of L‐pentofuranose‐mimetic iminosugars. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Juan Manuel Mesa
- Universidad de la Republica Uruguay Organic chemistry department Gral. Flores 2124 11800 Montevideo URUGUAY
| | - Marcelo Alberto Comini
- Institut Pasteur Montevideo Group Redox Biology of Trypanosomes Mataojo 2020 11400 Montevideo URUGUAY
| | - Estefania Dibello
- Universidad de la República Uruguay Departamento de Química Orgánica Gral. Flores 21 24 11800 Montevideo URUGUAY
| | - Daniela Gamenara
- Universidad de la Republica Facultad de Quimica Organic Chemistry Department Gral. Flores 2124 11800 Montevideo URUGUAY
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39
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Cank KB, Shepherd RA, Knowles SL, Rangel-Grimaldo M, Raja HA, Bunch ZL, Cech NB, Rice CA, Kyle DE, Falkinham JO, Burdette JE, Oberlies NH. Polychlorinated cyclopentenes from a marine derived Periconia sp. (strain G1144). PHYTOCHEMISTRY 2022; 199:113200. [PMID: 35421431 PMCID: PMC9173697 DOI: 10.1016/j.phytochem.2022.113200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/03/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
Studies on an organic extract of a marine fungus, Periconia sp. (strain G1144), led to the isolation of three halogenated cyclopentenes along with the known and recently reported rhytidhyester D; a series of spectrometric and spectroscopic techniques were used to elucidate these structures. Interestingly, two of these compounds represent tri-halogenated cyclopentene derivatives, which have been observed only rarely from Nature. The relative and absolute configurations of the compounds were established via mass spectrometry (MS), nuclear magnetic resonance (NMR) spectroscopy, Mosher's esters method, optical rotation and GIAO NMR calculations, including correlation coefficient calculations and the use of both DP4+ and dJ DP4 analyses. Several of the isolated compounds were tested for activity in anti-parasitic, antimicrobial, quorum sensing inhibition, and cytotoxicity assays and were shown to be inactive.
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Affiliation(s)
- Kristóf B Cank
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Robert A Shepherd
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Sonja L Knowles
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Manuel Rangel-Grimaldo
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Zoie L Bunch
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Nadja B Cech
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA
| | - Christopher A Rice
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, 724 Biological Sciences Building, University of Georgia, Athens, GA, 30602-2607, USA; Center for Tropical and Emerging Global Diseases, University of Georgia, 335 Coverdell Center 500 D.W. Brooks Drive, Athens, GA, 30602-7399, USA.
| | - Dennis E Kyle
- Center for Tropical and Emerging Global Diseases, University of Georgia, 335 Coverdell Center 500 D.W. Brooks Drive, Athens, GA, 30602-7399, USA.
| | - Joseph O Falkinham
- Department of Biological Sciences, Virginia Tech Center for Drug Discovery, Derring Hall Room 2125, 926 West Campus Drive, Mail Code 0406, Blacksburg, VA, 24061, USA.
| | - Joanna E Burdette
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, 833 South Wood Street, 333 PHARM, MC 781, Chicago, IL, 60612, USA.
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, Greensboro, NC, 27402-6170, USA.
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40
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Giannopoulos V, Smonou I. Asymmetric Reduction of α,α‐Dichloro‐β‐Keto Esters by NADPH‐Dependent Ketoreductases. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vasileios Giannopoulos
- University of Crete Department of Chemistry: Panepistemio Kretes Tmema Chemeias Chemistry GREECE
| | - Ioulia Smonou
- University of Crete Department of Chemistry Campus Voutes, Heraklion 71003 Heraklion, Crete GREECE
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41
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Chen MY, Kong FD, Yang L, Ma QY, Xie QY, Yu J, Chen PW, Zhou LM, Wu YG, Dai HF, Zhao YX. Phenethoxy Derivatives with Anti-inflammatory Activities from the Betelnut Endophytic Trichoderma asperellum G10. JOURNAL OF NATURAL PRODUCTS 2022; 85:1193-1200. [PMID: 35512012 DOI: 10.1021/acs.jnatprod.1c00813] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Eight new phenethoxy derivatives, trichoasperellins A-H (1-8), were isolated from the endophytic fungus Trichoderma asperellum G10 isolated from the medicinal plant Areca catechu L. The structures of these compounds were elucidated from spectroscopic data, J-based configurational analysis, and Mosher's methods. Compounds 1-4 and 6-8 bear one or two multioxidized C7 moieties with the same carbon skeleton. The carbon skeletons of compounds 6-8 are new, all containing three moieties connected via two acetal carbons similar to those of disaccharide glycosides. Compound 4 inhibited nitric oxide production with an IC50 value of 48.3 μM, comparable to that of the positive control indomethacin (IC50, 42.3 μM).
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Affiliation(s)
- Ming-Yang Chen
- College of Horticulture, Hainan University, Haikou 570228, People's Republic of China
| | - Fan-Dong Kong
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, People's Republic of China
| | - Li Yang
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
| | - Qing-Yun Ma
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
| | - Qing-Yi Xie
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
| | - Jing Yu
- College of Horticulture, Hainan University, Haikou 570228, People's Republic of China
| | - Peng-Wei Chen
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
| | - Li-Man Zhou
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, People's Republic of China
| | - You-Gen Wu
- College of Horticulture, Hainan University, Haikou 570228, People's Republic of China
| | - Hao-Fu Dai
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
| | - You-Xing Zhao
- Hainan Institute for Tropical Agricultural Resources, Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou 571101, People's Republic of China
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42
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Schröder M, Roß T, Hemmerling F, Hahn F. Studying a Bottleneck of Multimodular Polyketide Synthase Processing: the Polyketide Structure-Dependent Performance of Ketoreductase Domains. ACS Chem Biol 2022; 17:1030-1037. [PMID: 35412301 DOI: 10.1021/acschembio.2c00047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ketoreductases (KRs) are canonical domains of type I polyketide synthases (PKSs). They stereoselectively reduce ACP-bound β-ketothioester intermediates and are responsible for a large part of the stereocenters in reduced polyketides. Albeit essential for the understanding and engineering of PKS, the specific effects of altering the polyketide part of KR precursors on their performance has rarely been studied. We present investigations on the substrate-dependent performance of six isolated KR domains using a library of structurally diverse surrogates for PKS thioester intermediates. A pronounced correlation between the polyketide structure and the KR performance was observed with activity and stereoselectivity diminishing with growing deviation from the natural KR precursor structure. The extent of this decrease and the profile of arising side products was characteristic for the individual KRs. Our results reinforce the importance of structure-KR performance relationships and suggest extended studies with isolated domains and whole PKS modules.
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Affiliation(s)
- Marius Schröder
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
- Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, 30167 Hannover, Germany
| | - Theresa Roß
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Franziska Hemmerling
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
- Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, 30167 Hannover, Germany
| | - Frank Hahn
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
- Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, 30167 Hannover, Germany
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43
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Huo ZQ, Zhu F, Zhang XW, Zhang X, Liang HB, Yao JC, Liu Z, Zhang GM, Yao QQ, Qin GF. Approaches to Configuration Determinations of Flexible Marine Natural Products: Advances and Prospects. Mar Drugs 2022; 20:333. [PMID: 35621984 PMCID: PMC9143581 DOI: 10.3390/md20050333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 02/07/2023] Open
Abstract
Flexible marine natural products (MNPs), such as eribulin and bryostatin, play an important role in the development of modern marine drugs. However, due to the multiple chiral centers and geometrical uncertainty of flexible systems, configuration determinations of flexible MNPs face great challenges, which, in turn, have led to obstacles in druggability research. To resolve this issue, the comprehensive use of multiple methods is necessary. Additionally, configuration assignment methods, such as X-ray single-crystal diffraction (crystalline derivatives, crystallization chaperones, and crystalline sponges), NMR-based methods (JBCA and Mosher's method), circular dichroism-based methods (ECCD and ICD), quantum computational chemistry-based methods (NMR calculations, ECD calculations, and VCD calculations), and chemical transformation-based methods should be summarized. This paper reviews the basic principles, characteristics, and applicability of the methods mentioned above as well as application examples to broaden the research and applications of these methods and to provide a reference for the configuration determinations of flexible MNPs.
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Affiliation(s)
- Zong-Qing Huo
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
| | - Feng Zhu
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
| | - Xing-Wang Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Xiao Zhang
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China;
| | - Hong-Bao Liang
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China;
| | - Jing-Chun Yao
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
| | - Zhong Liu
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
| | - Gui-Min Zhang
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China;
| | - Qing-Qiang Yao
- Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China;
| | - Guo-Fei Qin
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi 273400, China; (Z.-Q.H.); (F.Z.); (H.-B.L.); (J.-C.Y.); (Z.L.); (G.-M.Z.)
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Yu G, Sun P, Aierken R, Sun C, Zhang Z, Che Q, Zhang G, Zhu T, Gu Q, Li M, Li D. Linear polyketides produced by co-culture of Penicillium crustosum and Penicillium fellutanum. MARINE LIFE SCIENCE & TECHNOLOGY 2022; 4:237-244. [PMID: 37073220 PMCID: PMC10077197 DOI: 10.1007/s42995-021-00125-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 11/17/2021] [Indexed: 05/03/2023]
Abstract
Two new polyketides, penifellutins A (1) and B (2), possessing a 22 carbon linear skeleton, were isolated from a co-culture of the deep-sea-derived fungi Penicillium crustosum PRB-2 and Penicillium fellutanum HDN14-323. Meanwhile, two esterification products of 1, penifellutins C (3) and D (4), were obtained because compound 1 could be esterified spontaneously when stored in methanol. Their configurations were difficult to determine because of chiral central crowdedness, structural flexibility and instability. As such, we solved this issue by comprehensively using Mo2(OAc)4-based CD experiments, density functional theory calculation of 13C NMR, DP4 + probability analysis and many chemical reactions, including making acetonide derivative, Mosher's method, PGME method, etc. Compounds 1 and 2 show obvious inhibitory activity on the liver hyperplasia of zebrafish larvae at a concentration of 10 μmol/L, while 3 and 4 show no activity, indicating that two carboxyls in the structure are important active sites. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-021-00125-8.
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Affiliation(s)
- Guihong Yu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
- School of Life Sciences, Shandong Province Key Laboratory of Applied Mycology, Qingdao Agricultural University, Qingdao, 266109 China
| | - Peng Sun
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Reyilamu Aierken
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Science, Xiamen University, Xiamen, 361102 China
| | - Chunxiao Sun
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Zhenzhen Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Qian Che
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Guojian Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts of Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts of Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Mingyu Li
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Science, Xiamen University, Xiamen, 361102 China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts of Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
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Pech-Puch D, Forero AM, Fuentes-Monteverde JC, Lasarte-Monterrubio C, Martinez-Guitian M, González-Salas C, Guillén-Hernández S, Villegas-Hernández H, Beceiro A, Griesinger C, Rodríguez J, Jiménez C. Antimicrobial Diterpene Alkaloids from an Agelas citrina Sponge Collected in the Yucatán Peninsula. Mar Drugs 2022; 20:298. [PMID: 35621949 PMCID: PMC9143306 DOI: 10.3390/md20050298] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 12/10/2022] Open
Abstract
Three new diterpene alkaloids, (+)-8-epiagelasine T (1), (+)-10-epiagelasine B (2), and (+)-12-hydroxyagelasidine C (3), along with three known compounds, (+)-ent-agelasine F (4), (+)-agelasine B (5), and (+)-agelasidine C (6), were isolated from the sponge Agelas citrina, collected on the coasts of the Yucatán Peninsula (Mexico). Their chemical structures were elucidated by 1D and 2D NMR spectroscopy, HRESIMS techniques, and a comparison with literature data. Although the synthesis of (+)-ent-agelasine F (4) has been previously reported, this is the first time that it was isolated as a natural product. The evaluation of the antimicrobial activity against the Gram-positive pathogens Staphylococcus aureus, Streptococcus pneumoniae, Enterococcus faecalis showed that all of them were active, with (+)-10-epiagelasine B (2) being the most active compound with an MIC in the range of 1-8 µg/mL. On the other hand, the Gram-negative pathogenes Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae were also evaluated, and only (+)-agelasine B (5) showed a moderate antibacterial activity with a MIC value of 16 μg/mL.
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Affiliation(s)
- Dawrin Pech-Puch
- Departamento de Química, Facultade de Ciencias e Centro de Investigacións Científicas Avanzadas (CICA), Universidade de A Coruña, 15071 A Coruña, Spain; (D.P.-P.); (A.M.F.)
- Departamento de Biología Marina, Universidad Autónoma de Yucatán, Km. 15.5, Carretera Mérida-Xmatkuil, A.P. 4-116 Itzimná, Merida C.P. 97100, Yucatán, Mexico; (C.G.-S.); (S.G.-H.); (H.V.-H.)
| | - Abel M. Forero
- Departamento de Química, Facultade de Ciencias e Centro de Investigacións Científicas Avanzadas (CICA), Universidade de A Coruña, 15071 A Coruña, Spain; (D.P.-P.); (A.M.F.)
| | - Juan Carlos Fuentes-Monteverde
- Department of NMR Based Structural Biology, Max Planck Institute (MPI) for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany; (J.C.F.-M.); (C.G.)
| | - Cristina Lasarte-Monterrubio
- Microbiology Department of the University Hospital A Coruña (CHUAC), Institute of Biomedical Research of A Coruña (INIBIC), Centro de Investigación Biomédica en Red (CIBER) Infec., 15006 A Coruña, Spain; (C.L.-M.); (M.M.-G.); (A.B.)
| | - Marta Martinez-Guitian
- Microbiology Department of the University Hospital A Coruña (CHUAC), Institute of Biomedical Research of A Coruña (INIBIC), Centro de Investigación Biomédica en Red (CIBER) Infec., 15006 A Coruña, Spain; (C.L.-M.); (M.M.-G.); (A.B.)
| | - Carlos González-Salas
- Departamento de Biología Marina, Universidad Autónoma de Yucatán, Km. 15.5, Carretera Mérida-Xmatkuil, A.P. 4-116 Itzimná, Merida C.P. 97100, Yucatán, Mexico; (C.G.-S.); (S.G.-H.); (H.V.-H.)
| | - Sergio Guillén-Hernández
- Departamento de Biología Marina, Universidad Autónoma de Yucatán, Km. 15.5, Carretera Mérida-Xmatkuil, A.P. 4-116 Itzimná, Merida C.P. 97100, Yucatán, Mexico; (C.G.-S.); (S.G.-H.); (H.V.-H.)
| | - Harold Villegas-Hernández
- Departamento de Biología Marina, Universidad Autónoma de Yucatán, Km. 15.5, Carretera Mérida-Xmatkuil, A.P. 4-116 Itzimná, Merida C.P. 97100, Yucatán, Mexico; (C.G.-S.); (S.G.-H.); (H.V.-H.)
| | - Alejandro Beceiro
- Microbiology Department of the University Hospital A Coruña (CHUAC), Institute of Biomedical Research of A Coruña (INIBIC), Centro de Investigación Biomédica en Red (CIBER) Infec., 15006 A Coruña, Spain; (C.L.-M.); (M.M.-G.); (A.B.)
| | - Christian Griesinger
- Department of NMR Based Structural Biology, Max Planck Institute (MPI) for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany; (J.C.F.-M.); (C.G.)
| | - Jaime Rodríguez
- Departamento de Química, Facultade de Ciencias e Centro de Investigacións Científicas Avanzadas (CICA), Universidade de A Coruña, 15071 A Coruña, Spain; (D.P.-P.); (A.M.F.)
| | - Carlos Jiménez
- Departamento de Química, Facultade de Ciencias e Centro de Investigacións Científicas Avanzadas (CICA), Universidade de A Coruña, 15071 A Coruña, Spain; (D.P.-P.); (A.M.F.)
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Tarazona G, Fernández R, Pérez M, Millán RE, Jiménez C, Rodríguez J, Cuevas C. Enigmazole C: A Cytotoxic Macrocyclic Lactone and Its Ring-Opened Derivatives from a New Species of Homophymia Sponge. JOURNAL OF NATURAL PRODUCTS 2022; 85:1059-1066. [PMID: 35234467 PMCID: PMC9040057 DOI: 10.1021/acs.jnatprod.1c01179] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Indexed: 06/14/2023]
Abstract
A new macrolide, enigmazole C (1), and two additional analogues, enigmazoles E (2) and D (3), were obtained from a new species of the Homophymia genus as part of an ongoing discovery program at PharmaMar to study cytotoxic substances from marine sources. The structures were fully characterized by cumulative analyses of NMR, IR, and MS spectra, along with density functional theory computational calculations. All three of the new compounds feature an unusual 2,3-dihydro-4H-pyran-4-one moiety, but only enigmazoles C (1) and D (3) showed cytotoxic activity in the micromolar range against A-549 (lung), HT-29 (colon), MDA-MB-231 (breast), and PSN-1 (pancreas) tumor cells.
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Affiliation(s)
- Guillermo Tarazona
- R&D, PharmaMar, Avenida De los Reyes, 1, Pol. Ind. La Mina-Norte, 28770-Colmenar Viejo, Madrid, Spain
| | - Rogelio Fernández
- R&D, PharmaMar, Avenida De los Reyes, 1, Pol. Ind. La Mina-Norte, 28770-Colmenar Viejo, Madrid, Spain
| | - Marta Pérez
- R&D, PharmaMar, Avenida De los Reyes, 1, Pol. Ind. La Mina-Norte, 28770-Colmenar Viejo, Madrid, Spain
| | - Ramón E. Millán
- Departmento
de Química, Facultad de Ciencias and Centro de Investigacions
Científicas Avanzadas (CICA), Universidade
de A Coruña, 15071 A Coruña, Spain
| | - Carlos Jiménez
- Departmento
de Química, Facultad de Ciencias and Centro de Investigacions
Científicas Avanzadas (CICA), Universidade
de A Coruña, 15071 A Coruña, Spain
| | - Jaime Rodríguez
- Departmento
de Química, Facultad de Ciencias and Centro de Investigacions
Científicas Avanzadas (CICA), Universidade
de A Coruña, 15071 A Coruña, Spain
| | - Carmen Cuevas
- R&D, PharmaMar, Avenida De los Reyes, 1, Pol. Ind. La Mina-Norte, 28770-Colmenar Viejo, Madrid, Spain
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Wang B, Bruhn JF, Weldeab A, Wilson TS, McGilvray PT, Mashore M, Song Q, Scapin G, Lin Y. Absolute configuration determination of pharmaceutical crystalline powders by MicroED via chiral salt formation. Chem Commun (Camb) 2022; 58:4711-4714. [PMID: 35293405 PMCID: PMC9004345 DOI: 10.1039/d2cc00221c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/03/2022] [Indexed: 11/21/2022]
Abstract
Microcrystal electron diffraction (MicroED) has established its complementary role alongside X-ray diffraction in crystal structure elucidation. Unfortunately, kinematical refinement of MicroED data lacks the differentiation power to assign the absolute structure solely based on the measured intensities. Here we report a method for absolute configuration determination via MicroED by employing salt formation with chiral counterions.
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Affiliation(s)
- Bo Wang
- Small Molecule Drug Product Development, Biogen, 115 Broadway, Cambridge, MA 02142, USA.
| | - Jessica F Bruhn
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Asmerom Weldeab
- Small Molecule Drug Product Development, Biogen, 115 Broadway, Cambridge, MA 02142, USA.
| | - Timothy S Wilson
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Philip T McGilvray
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Michael Mashore
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Qiong Song
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Giovanna Scapin
- NanoImaging Services, 4940 Carroll Canyon Road, San Diego, CA 92121, USA
| | - Yiqing Lin
- Small Molecule Drug Product Development, Biogen, 115 Broadway, Cambridge, MA 02142, USA.
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Jin Q, Zhao YL, Liu YP, Zhang RS, Zhu PF, Zhao LQ, Qin XJ, Luo XD. Anti-inflammatory and analgesic monoterpenoid indole alkaloids of Kopsia officinalis. JOURNAL OF ETHNOPHARMACOLOGY 2022; 285:114848. [PMID: 34798159 DOI: 10.1016/j.jep.2021.114848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/05/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE "Ya gai", an important part of Dai medical theory, is traditionally recognized as an antidote. Kopsia officinalis Tsiang et P. T. Li is a "Ya gai" related medicine and has been widely used by Dai people for the treatment of pain and inflammation. Previous literature on title species suggested that monoterpenoid indole alkaloids (MIAs) could be its main bioactive components. However, the specific bioactive ingredients for inflammation-related treatment are still unrevealed, which inspired us to conduct a phytochemical and pharmacological investigation related to its traditional use. AIM OF THE STUDY To support the traditional use of K. officinalis by assessing the anti-inflammatory and analgesic effects of its purified MIAs. MATERIAL AND METHODS Compounds were isolated and purified from the barks and leaves of K. officinalis using diverse chromatographic methods. The structures were established by means of extensive spectroscopic analyses and quantum computational technique. The anti-inflammatory activities of the purified MIAs were evaluated in vitro based on the suppression of lipopolysaccharide-activated inflammatory mediators (COX-2, IL-1β, and TNF-α) in RAW 264.7 macrophage cells. Anti-inflammatory and analgesic activities in vivo were assessed with carrageenan-induced paw edema and acetic acid-stimulated writhing in mice models. RESULTS 23 MIAs including four new compounds were obtained and structurally established. Most of isolates showed significant anti-inflammatory effects in vitro by inhibiting inflammatory mediators (COX-2, IL-1β, and TNF-α). Further pharmacological evaluation in vivo revealed that 12-hydroxy-19(R)-hydroxy-ibophyllidine (1) and 11,12-methylenedioxykopsinaline N4-oxide (5) remarkably decreased the number of writhing, while kopsinic acid (8), (-)-kopsinilam (12), and normavacurine-21-one (20) significantly relieved paw edema, respectively, even better than the positive control aspirin. CONCLUSIONS The in vitro and in vivo findings supported the traditional use of K. officinalis with respect to its anti-inflammatory and analgesic effect, as well as provided potent bioactive MIAs for further chemical modification and pharmacological investigation.
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Affiliation(s)
- Qiong Jin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Yun-Li Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China
| | - Ya-Ping Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Ruo-Song Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Pei-Feng Zhu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Lan-Qin Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
| | - Xiao-Dong Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China.
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Li H, Xu Z, Zhang S, Jia Y, Zhao Y. Construction of Lewis Pairs for Optimal Enantioresolution via Recognition-Enabled “Chromatographic” 19F NMR Spectroscopy. Anal Chem 2022; 94:2023-2031. [DOI: 10.1021/acs.analchem.1c03783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Huanhuan Li
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Zhenchuang Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Siquan Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Yushu Jia
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Yanchuan Zhao
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
- Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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Oppong-Danquah E, Blümel M, Scarpato S, Mangoni A, Tasdemir D. Induction of Isochromanones by Co-Cultivation of the Marine Fungus Cosmospora sp. and the Phytopathogen Magnaporthe oryzae. Int J Mol Sci 2022; 23:782. [PMID: 35054969 PMCID: PMC8775470 DOI: 10.3390/ijms23020782] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/07/2022] [Accepted: 01/09/2022] [Indexed: 02/04/2023] Open
Abstract
Microbial co-cultivation is a promising approach for the activation of biosynthetic gene clusters (BGCs) that remain transcriptionally silent under artificial culture conditions. As part of our project aiming at the discovery of marine-derived fungal agrochemicals, we previously used four phytopathogens as model competitors in the co-cultivation of 21 marine fungal strains. Based on comparative untargeted metabolomics analyses and anti-phytopathogenic activities of the co-cultures, we selected the co-culture of marine Cosmospora sp. with the phytopathogen Magnaporthe oryzae for in-depth chemical studies. UPLC-MS/MS-based molecular networking (MN) of the co-culture extract revealed an enhanced diversity of compounds in several molecular families, including isochromanones, specifically induced in the co-culture. Large scale co-cultivation of Cosmospora sp. and M. oryzae resulted in the isolation of five isochromanones from the whole co-culture extract, namely the known soudanones A, E, D (1-3) and their two new derivatives, soudanones H-I (4-5), the known isochromans, pseudoanguillosporins A and B (6, 7), naphtho-γ-pyrones, cephalochromin and ustilaginoidin G (8, 9), and ergosterol (10). Their structures were established by NMR, HR-ESIMS, FT-IR, electronic circular dichroism (ECD) spectroscopy, polarimetry ([α]D), and Mosher's ester reaction. Bioactivity assays revealed antimicrobial activity of compounds 2 and 3 against the phytopathogens M. oryzae and Phytophthora infestans, while pseudoanguillosporin A (6) showed the broadest and strongest anti-phytopathogenic activity against Pseudomonas syringae, Xanthomonas campestris, M. oryzae and P. infestans. This is the first study assessing the anti-phytopathogenic activities of soudanones.
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Affiliation(s)
- Ernest Oppong-Danquah
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Product Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (E.O.-D.); (M.B.)
| | - Martina Blümel
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Product Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (E.O.-D.); (M.B.)
| | - Silvia Scarpato
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy; (S.S.); (A.M.)
| | - Alfonso Mangoni
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy; (S.S.); (A.M.)
| | - Deniz Tasdemir
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Product Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (E.O.-D.); (M.B.)
- Faculty of Mathematics and Natural Science, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
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