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Goulart MO, Paulino JM, Silveira NN, Bertonha AF, Berlinck RGS, Santos RA. Isolation and comparative genotoxicity screening of trichokonins VI and VIII on CHO-K1 cells. Drug Chem Toxicol 2024:1-9. [PMID: 39262131 DOI: 10.1080/01480545.2024.2389977] [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: 12/01/2023] [Revised: 07/10/2024] [Accepted: 08/04/2024] [Indexed: 09/13/2024]
Abstract
Peptaibols are fungal peptides that exhibit efficacy against pathogen microorganisms. Trichokonin VI (TK-VI) and trichokonin VIII (TK-VIII) are known peptaibols isolated from the endolichenic fungi Hypocrea sp. Previous investigations reported that trichokonin VI presents antiproliferative effects on tumor cells. This study is pioneering in elucidating the genotoxic effects of TK-VI and TK-VIII, contributing to the thorough assessment of their safety as potential therapeutic agents. The present investigation aimed to evaluate the genotoxicity of TK-VI and TK-VIII on CHO-K1 cells. Cytotoxicity was evaluated using the XTT assay and clonogenic survival assays, followed by evaluation of DNA damage using the comet assay and micronucleus test conducted in vitro. The XTT assay results indicated IC50 values of 10.30 µM and 9.89 µM for TK-VI and TK-VIII, respectively. The clonogenic survival assay indicated that concentrations of 10 µM or higher completely inhibited the cell colony formation. In the comet assay, both TK-VI and TK-VIII increased the DNA damage score and the frequency of comet nuclei in all tested concentrations. In the micronucleus assay, TK-VI and TK-VIII at 10 µM increased the frequency of MN in CHO-K1 cells. Both TK-VI and TK-VIII exhibited genotoxic effects. Our findings underscore the importance of considering the genotoxicological safety of peptaibols, particularly when assessing their potential for other biological activities.
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Affiliation(s)
| | | | | | - Ariane F Bertonha
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brasil
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brasil
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2
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Fang P, Yu S, Ma X, Hou L, Li T, Gao K, Wang Y, Sun Q, Shang L, Liu Q, Nie M, Yang J. Applications of tandem mass spectrometry (MS/MS) in antimicrobial peptides field: Current state and new applications. Heliyon 2024; 10:e28484. [PMID: 38601527 PMCID: PMC11004759 DOI: 10.1016/j.heliyon.2024.e28484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/12/2024] Open
Abstract
Antimicrobial peptides (AMPs) constitute a group of small molecular peptides that exhibit a wide range of antimicrobial activity. These peptides are abundantly present in the innate immune system of various organisms. Given the rise of multidrug-resistant bacteria, microbiological studies have identified AMPs as potential natural antibiotics. In the context of antimicrobial resistance across various human pathogens, AMPs hold considerable promise for clinical applications. However, numerous challenges exist in the detection of AMPs, particularly by immunological and molecular biological methods, especially when studying of newly discovered AMPs in proteomics. This review outlines the current status of AMPs research and the strategies employed in their development, considering resent discoveries and methodologies. Subsequently, we focus on the advanced techniques of mass spectrometry for the quantification of AMPs in diverse samples, and analyzes their application, advantages, and limitations. Additionally, we propose suggestions for the future development of tandem mass spectrometry for the detection of AMPs.
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Affiliation(s)
- Panpan Fang
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Songlin Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, 100730, PR China
| | - Xiaoli Ma
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, 100730, PR China
| | - Lian Hou
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, 100730, PR China
| | - Tiewei Li
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Kaijie Gao
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Yingyuan Wang
- Department of Neonatal Intensive Care Unit, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Qianqian Sun
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Lujun Shang
- Department of Laboratory Medicine, Guizhou Provincial People's Hospital, Guiyang, 550004, PR China
| | - Qianqian Liu
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Manjie Nie
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
| | - Junmei Yang
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, 450018, PR China
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Liang X, Yang JF, Huang ZH, Ma X, Yan Y, Qi SH. New Antibacterial Peptaibiotics against Plant and Fish Pathogens from the Deep-Sea-Derived Fungus Simplicillium obclavatum EIODSF 020. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6402-6413. [PMID: 38491989 DOI: 10.1021/acs.jafc.4c00493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/18/2024]
Abstract
Bacterial diseases could severely harm agricultural production. To develop new antibacterial agents, the secondary metabolites of a deep-sea-derived fungus Simplicillium obclavatum EIODSF 020 with antibacterial activities against plant and fish pathogens were investigated by a bioassay-guided approach, which led to the isolation of 11 new peptaibiotics, simplicpeptaibs A-K (1-11). They contain 16-19 residues, including β-alanine, tyrosine, or tyrosine O-sulfate, that were rarely present in peptaibiotics. Their structures were elucidated by spectroscopic analyses (NMR, HRMS, HRMS2, and ECD) and Marfey's method. The primary and secondary structures of novel sulfated peptaibiotic 9 were reconfirmed by single-crystal X-ray diffraction analysis. Genome sequencing of S. obclavatum EIODSF 020 allowed the detection of a gene cluster encoding two individual NRPSs (totally containing 19 modules) that was closely related to simplicpeptaib biosynthesis. Antibacterial investigations of 1-11 together with the previously isolated linear and cyclic peptides from this strain suggested the antibacterial property of this fungus was attributed to the peptaibiotics and cyclic lipopeptides. Among them, compounds 4, 6, 7, and 9 showed significant activity against the tobacco pathogen Ralstonia solanacearum or tilapia pathogens Streptococcus iniae and Streptococcus agalactiae. The antibacterial activity of 6 against R. solanacearum could be enhanced by the addition of 1% NaCl. The structure-bioactivity relationship of simplicpeptaibs was discussed.
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Affiliation(s)
- Xiao Liang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Jia-Fan Yang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhong-Hui Huang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Xuan Ma
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Yan Yan
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Shu-Hua Qi
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
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Dong W, Chen B, Zhang R, Dai H, Han J, Lu Y, Zhao Q, Liu X, Liu H, Sun J. Identification and Characterization of Peptaibols as the Causing Agents of Pseudodiploöspora longispora Infecting the Edible Mushroom Morchella. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18385-18394. [PMID: 37888752 DOI: 10.1021/acs.jafc.3c05783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Pseudodiploöspora longispora (previously known as Diploöspora longispora) is a pathogenic fungus of Morchella mushrooms. The molecular mechanism underlying the infection of P. longispora in fruiting bodies remains unknown. In this study, three known peptaibols, alamethicin F-50, polysporin B, and septocylindrin B (1-3), and a new analogue, longisporin A (4), were detected and identified in the culture of P. longispora and the fruiting bodies of M. sextelata infected by P. longispora. The primary amino sequence of longisporin A is defined as Ac-Aib1-Pro2-Aib3-Ala4-Aib5-Aib6-Gln7-Aib8-Val9-Aib10-Glu11-Leu12-Aib13-Pro14-Val15-Aib16-Aib17-Gln18-Gln19-Phaol20. The peptaibols 1-4 greatly suppressed the mycelial growth of M. sextelata. In addition, treatment with alamethicin F-50 produced damage on the cell wall and membrane of M. sextelata. Compounds 1-4 also exhibited inhibitory activities against human pathogens including Aspergillus fumigatus, Candida albicans, methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus, and plant pathogen Verticillium dahlia. Herein, peptaibols are confirmed as virulence factors involved in the invasion of P. longispora on Morchella, providing insights into the interaction between pathogenic P. longispora and mushrooms.
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Affiliation(s)
- Wang Dong
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
| | - Baosong Chen
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
| | - Rui Zhang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Huanqin Dai
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junjie Han
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
| | - Yongzhong Lu
- School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang550003 ,China
| | - Qi Zhao
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China
| | - Xingzhong Liu
- Department of Microbiology, College of Life Science, Nankai University, Jinnan District, Tianjin 300350, China
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingzu Sun
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 Park 1, Beichen West Road, Chaoyang District, Beijing 100101, China
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Salim AA, Butler MS, Blaskovich MAT, Henderson IR, Capon RJ. Natural products as anthelmintics: safeguarding animal health. Nat Prod Rep 2023; 40:1754-1808. [PMID: 37555325 DOI: 10.1039/d3np00019b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Covering literature to December 2022This review provides a comprehensive account of all natural products (500 compounds, including 17 semi-synthetic derivatives) described in the primary literature up to December 2022, reported to be capable of inhibiting the egg hatching, motility, larval development and/or the survival of helminths (i.e., nematodes, flukes and tapeworms). These parasitic worms infect and compromise the health and welfare, productivity and lives of commercial livestock (i.e., sheep, cattle, horses, pigs, poultry and fish), companion animals (i.e., dogs and cats) and other high value, endangered and/or exotic animals. Attention is given to chemical structures, as well as source organisms and anthelmintic properties, including the nature of bioassay target species, in vivo animal hosts, and measures of potency.
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Affiliation(s)
- Angela A Salim
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Mark S Butler
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Mark A T Blaskovich
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Ian R Henderson
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Robert J Capon
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
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6
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Shepherd RA, Earp CE, Cank KB, Raja HA, Burdette J, Maher SP, Marin AA, Ruberto AA, Mai SL, Darveaux BA, Kyle DE, Pearce CJ, Oberlies NH. Sheptide A: an antimalarial cyclic pentapeptide from a fungal strain in the Herpotrichiellaceae. J Antibiot (Tokyo) 2023; 76:642-649. [PMID: 37731043 PMCID: PMC10602849 DOI: 10.1038/s41429-023-00655-6] [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: 12/14/2022] [Revised: 08/28/2023] [Accepted: 09/01/2023] [Indexed: 09/22/2023]
Abstract
As part of ongoing efforts to isolate biologically active fungal metabolites, a cyclic pentapeptide, sheptide A (1), was discovered from strain MSX53339 (Herpotrichiellaceae). The structure and sequence of 1 were determined primarily by analysis of 2D NMR and HRMS/MS data, while the absolute configuration was assigned using a modified version of Marfey's method. In an in vitro assay for antimalarial potency, 1 displayed a pEC50 value of 5.75 ± 0.49 against malaria-causing Plasmodium falciparum. Compound 1 was also tested in a counter screen for general cytotoxicity against human hepatocellular carcinoma (HepG2), yielding a pCC50 value of 5.01 ± 0.45 and indicating a selectivity factor of ~6. This makes 1 the third known cyclic pentapeptide biosynthesized by fungi with antimalarial activity.
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Affiliation(s)
- Robert A Shepherd
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Cody E Earp
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Kristof B Cank
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Huzefa A Raja
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Joanna Burdette
- Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL, USA
| | - Steven P Maher
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Adriana A Marin
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Anthony A Ruberto
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Sarah Lee Mai
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | | | - Dennis E Kyle
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | | | - Nicholas H Oberlies
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA.
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Tomah AA, Zhang Z, Alamer ISA, Khattak AA, Ahmed T, Hu M, Wang D, Xu L, Li B, Wang Y. The Potential of Trichoderma-Mediated Nanotechnology Application in Sustainable Development Scopes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2475. [PMID: 37686983 PMCID: PMC10490099 DOI: 10.3390/nano13172475] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023]
Abstract
The environmental impact of industrial development has been well-documented. The use of physical and chemical methods in industrial development has negative consequences for the environment, raising concerns about the sustainability of this approach. There is a growing need for advanced technologies that are compatible with preserving the environment. The use of fungi products for nanoparticle (NP) synthesis is a promising approach that has the potential to meet this need. The genus Trichoderma is a non-pathogenic filamentous fungus with a high degree of genetic diversity. Different strains of this genus have a variety of important environmental, agricultural, and industrial applications. Species of Trichoderma can be used to synthesize metallic NPs using a biological method that is environmentally friendly, low cost, energy saving, and non-toxic. In this review, we provide an overview of the role of Trichoderma metabolism in the synthesis of metallic NPs. We discuss the different metabolic pathways involved in NP synthesis, as well as the role of metabolic metabolites in stabilizing NPs and promoting their synergistic effects. In addition, the future perspective of NPs synthesized by extracts of Trichoderma is discussed, as well as their potential applications in biomedicine, agriculture, and environmental health.
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Affiliation(s)
- Ali Athafah Tomah
- State Key Laboratory for Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (A.A.T.); (Z.Z.)
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agriculture, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (I.S.A.A.); (A.A.K.); (T.A.); (B.L.)
- Plant Protection, College of Agriculture, University of Misan, Al-Amarah 62001, Iraq
| | - Zhen Zhang
- State Key Laboratory for Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (A.A.T.); (Z.Z.)
| | - Iman Sabah Abd Alamer
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agriculture, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (I.S.A.A.); (A.A.K.); (T.A.); (B.L.)
- Plant Protection, Agriculture Directorate, Al-Amarah 62001, Iraq
| | - Arif Ali Khattak
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agriculture, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (I.S.A.A.); (A.A.K.); (T.A.); (B.L.)
| | - Temoor Ahmed
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agriculture, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (I.S.A.A.); (A.A.K.); (T.A.); (B.L.)
- Xianghu Laboratory, Hangzhou 311231, China
| | - Minjun Hu
- Agricultural Technology Extension Center of Fuyang District, Hangzhou 311400, China;
| | - Daoze Wang
- Hangzhou Rural Revitalization Service Center, Hangzhou 310020, China;
| | - Lihui Xu
- Institute of Eco-Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Bin Li
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agriculture, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (I.S.A.A.); (A.A.K.); (T.A.); (B.L.)
| | - Yanli Wang
- State Key Laboratory for Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (A.A.T.); (Z.Z.)
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Lam YTH, Ricardo MG, Rennert R, Frolov A, Porzel A, Brandt W, Stark P, Westermann B, Arnold N. Rare Glutamic Acid Methyl Ester Peptaibols from Sepedonium ampullosporum Damon KSH 534 Exhibit Promising Antifungal and Anticancer Activity. Int J Mol Sci 2021; 22:ijms222312718. [PMID: 34884518 PMCID: PMC8657771 DOI: 10.3390/ijms222312718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/17/2021] [Accepted: 11/23/2021] [Indexed: 01/29/2023] Open
Abstract
Fungal species of genus Sepedonium are rich sources of diverse secondary metabolites (e.g., alkaloids, peptaibols), which exhibit variable biological activities. Herein, two new peptaibols, named ampullosporin F (1) and ampullosporin G (2), together with five known compounds, ampullosporin A (3), peptaibolin (4), chrysosporide (5), c(Trp-Ser) (6) and c(Trp-Ala) (7), have been isolated from the culture of Sepedonium ampullosporum Damon strain KSH534. The structures of 1 and 2 were elucidated based on ESI-HRMSn experiments and intense 1D and 2D NMR analyses. The sequence of ampullosporin F (1) was determined to be Ac-Trp1-Ala2-Aib3-Aib4-Leu5-Aib6-Gln7-Aib8-Aib9-Aib10-GluOMe11-Leu12-Aib13-Gln14-Leuol15, while ampullosporin G (2) differs from 1 by exchanging the position of Gln7 with GluOMe11. Furthermore, the total synthesis of 1 and 2 was carried out on solid-phase to confirm the absolute configuration of all chiral amino acids as L. In addition, ampullosporin F (1) and G (2) showed significant antifungal activity against B. cinerea and P. infestans, but were inactive against S. tritici. Cell viability assays using human prostate (PC-3) and colorectal (HT-29) cancer cells confirmed potent anticancer activities of 1 and 2. Furthermore, a molecular docking study was performed in silico as an attempt to explain the structure-activity correlation of the characteristic ampullosporins (1–3).
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Affiliation(s)
- Yen T. H. Lam
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, Hanoi 100000, Vietnam
| | - Manuel G. Ricardo
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, D-14476 Potsdam, Germany
| | - Robert Rennert
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Biochemistry, Faculty of Biology, St. Petersburg State University, 199004 St. Petersburg, Russia
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Pauline Stark
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Correspondence: ; Tel.: +49-345-5582-1310
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9
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Gavryushina IA, Georgieva ML, Kuvarina AE, Sadykova VS. Peptaibols as Potential Antifungal and Anticancer Antibiotics: Current and Foreseeable Development (Review). APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821050070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Al Subeh ZY, Raja HA, Burdette JE, Falkinham JO, Hemby SE, Oberlies NH. Three diketomorpholines from a Penicillium sp. (strain G1071). PHYTOCHEMISTRY 2021; 189:112830. [PMID: 34157637 PMCID: PMC8292221 DOI: 10.1016/j.phytochem.2021.112830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 06/03/2021] [Accepted: 06/04/2021] [Indexed: 06/13/2023]
Abstract
Three previously undescribed diketomorpholine natural products, along with the known phenalenones, herqueinone and norherqueinone, were isolated from the mycoparasitic fungal strain G1071, which was identified as a Penicillium sp. in the section Sclerotiora. The structures were established by analyzing NMR data and mass spectrometry fragmentation patterns. The absolute configurations of deacetyl-javanicunine A, javanicunine C, and javanicunine D, were assigned by examining ECD spectra and Marfey's analysis. The structural diversity generated by this fungal strain was interesting, as only a few diketomorpholines (~17) have been reported from nature.
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Affiliation(s)
- Zeinab Y Al Subeh
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, United States
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, United States
| | - Joanna E Burdette
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, United States
| | - Joseph O Falkinham
- Department of Biological Sciences, Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, VA, United States
| | - Scott E Hemby
- Department of Basic Pharmaceutical Sciences, Fred Wilson School of Pharmacy, High Point University, High Point, NC, United States
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, United States.
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11
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Wu G, Dentinger BTM, Nielson JR, Peterson RT, Winter JM. Emerimicins V-X, 15-Residue Peptaibols Discovered from an Acremonium sp. through Integrated Genomic and Chemical Approaches. JOURNAL OF NATURAL PRODUCTS 2021; 84:1113-1126. [PMID: 33617244 DOI: 10.1021/acs.jnatprod.0c01186] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fermentation of Acremonium tubakii W. Gams isolated from a soil sample collected from the University of Utah led to the isolation and characterization of six new linear pentadecapeptides, emerimicins V-X (1-6). Peptaibols containing 15-residues are quite rare, with only 22 reported. Genome mining and bioinformatic analysis were used to identify the emerimicin 60 kbp eme biosynthetic cluster harboring a single 16-module hybrid polyketide-nonribosomal peptide synthetase. A detailed bioinformatic investigation of the corresponding 15 adenylation domains, combined with 1D and 2D NMR experiments, LC-MS/MS data, and advanced Marfey's method, allowed for the elucidation and absolute configuration of all proteinogenic and nonproteinogenic amino acid residues in 1-6. As some peptaibols possess cytotoxic activity, a zebrafish embryotoxicity assay was used to evaluate the toxicity of the six emerimicins and showed that emerimicin V (1) and VI (2) exhibit the most potent activity. Additionally, out of the six emerimicins, 1 displayed modest activity against Enterococcus faecalis, methicillin-resistant Staphylococcus aureus, and vancomycin-resistant Enterococcus faecium with MIC values of 64, 32, and 64 μg/mL, respectively.
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Affiliation(s)
- Guangwei Wu
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Bryn T M Dentinger
- Natural History Museum of Utah & School of Biological Sciences, University of Utah, Salt Lake City, Utah 84108, United States
| | - Jason R Nielson
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112, United States
| | - Randall T Peterson
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jaclyn M Winter
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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12
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van Bohemen AI, Ruiz N, Zalouk-Vergnoux A, Michaud A, Robiou du Pont T, Druzhinina I, Atanasova L, Prado S, Bodo B, Meslet-Cladiere L, Cochereau B, Bastide F, Maslard C, Marchi M, Guillemette T, Pouchus YF. Pentadecaibins I-V: 15-Residue Peptaibols Produced by a Marine-Derived Trichoderma sp. of the Harzianum Clade. JOURNAL OF NATURAL PRODUCTS 2021; 84:1271-1282. [PMID: 33600182 DOI: 10.1021/acs.jnatprod.0c01355] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In the course of investigations on peptaibol chemodiversity from marine-derived Trichoderma spp., five new 15-residue peptaibols named pentadecaibins I-V (1-5) were isolated from the solid culture of the strain Trichoderma sp. MMS1255 belonging to the T. harzianum species complex. Phylogenetic analyses allowed precise positioning of the strain close to T. lentiforme lineage inside the Harzianum clade. Peptaibol sequences were elucidated on the basis of their MS/MS fragmentation and extensive 2D NMR experiments. Amino acid configurations were determined by Marfey's analyses. The pentadecaibins are based on the sequences Ac-Aib1-Gly2-Ala3-Leu4-Aib/Iva5-Gln6-Aib/Iva7-Val/Leu8-Aib9-Ala10-Aib11-Aib12-Aib13-Gln14-Pheol15. Characteristic of the pentadecaibin sequences is the lack of the Aib-Pro motif commonly present in peptaibols produced by Trichoderma spp. Genome sequencing of Trichoderma sp. MMS1255 allowed the detection of a 15-module NRPS-encoding gene closely associated with pentadecaibin biosynthesis. Pentadecaibins were assessed for their potential antiproliferative and antimicrobial activities.
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Affiliation(s)
| | - Nicolas Ruiz
- Université de Nantes, MMS - EA2160, 44000 Nantes, France
| | | | - Aurore Michaud
- Université de Nantes, MMS - EA2160, 44000 Nantes, France
| | | | - Irina Druzhinina
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, 1040 Vienna, Austria
- Fungal Genomics Laboratory (FungiG), Nanjing Agricultural University, 210095 Nanjing, China
| | - Lea Atanasova
- Department of Food Science and Technology, University of Natural Resources and Life Sciences - BOKU, 1190 Vienna, Austria
| | - Soizic Prado
- Muséum National d'Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR 7245, CP 54, 57 Rue Cuvier, 75005 Paris, France
| | - Bernard Bodo
- Muséum National d'Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR 7245, CP 54, 57 Rue Cuvier, 75005 Paris, France
| | - Laurence Meslet-Cladiere
- Université de Brest, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, 29280 Plouzané, France
| | - Bastien Cochereau
- Université de Nantes, MMS - EA2160, 44000 Nantes, France
- Université de Brest, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, 29280 Plouzané, France
| | - Franck Bastide
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071 Beaucouzé, France
| | - Corentin Maslard
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071 Beaucouzé, France
| | - Muriel Marchi
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071 Beaucouzé, France
| | - Thomas Guillemette
- IRHS-UMR1345, Université d'Angers, INRAE, Institut Agro, SFR 4207 QuaSaV, 49071 Beaucouzé, France
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13
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The Emericellipsins A-E from an Alkalophilic Fungus Emericellopsis alkalina Show Potent Activity against Multidrug-Resistant Pathogenic Fungi. J Fungi (Basel) 2021; 7:jof7020153. [PMID: 33669976 PMCID: PMC7924852 DOI: 10.3390/jof7020153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 02/18/2021] [Accepted: 02/18/2021] [Indexed: 11/17/2022] Open
Abstract
Novel antimicrobial peptides with antifungal and cytotoxic activity were derived from the alkalophilic fungus Emericellopsis alkalina VKPM F1428. We previously reported that this strain produced emericellipsin A (EmiA), which has strong antifungal and cytotoxic properties. Further analyses of the metabolites obtained under a special alkaline medium resulted in the isolation of four new homologous (Emi B-E). In this work, we report the complete primary structure and detailed biological activity for the newly synthesized nonribosomal antimicrobial peptides called emericellipsins B-E. The inhibitory activity of themajor compound, EmiA, against drug-resistant pathogenic fungi was similar to that of amphotericin B (AmpB). At the same time, EmiA had no hemolytic activity towards human erythrocytes. In addition, EmiA demonstrated low cytotoxic activity towards the normal HPF line, but possessed cancer selectivity to the K-562 and HCT-116 cell lines. Emericillipsins from the alkalophilic fungus Emericellopsis alkaline are promising treatment alternatives to licensed antifungal drugs for invasive mycosis therapy, especially for multidrug-resistant aspergillosis and cryptococcosis.
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14
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Rawa MSA, Nogawa T, Okano A, Futamura Y, Nakamura T, Wahab HA, Osada H. A new peptaibol, RK-026A, from the soil fungus Trichoderma sp. RK10-F026 by culture condition-dependent screening. Biosci Biotechnol Biochem 2021; 85:69-76. [DOI: 10.1093/bbb/zbaa051] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 09/30/2020] [Indexed: 12/28/2022]
Abstract
Abstract
A new peptaibol, RK-026A (1) was isolated from a fungus, Trichoderma sp. RK10-F026, along with atroviridin B (2), alamethicin II (3), and polysporin B (4) as a cytotoxic compound, which was selected by principal component analysis of the MS data from 5 different culture conditions. The structure of 1 was determined as a new atroviridin B derivative containing Glu at the 18th residue instead of Gln by NMR and HR-MS analyses including the investigation of detailed MS/MS fragmentations. 1 showed cytotoxicity toward K562 leukemia cells at an IC50 value of 4.1 µm.
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Affiliation(s)
- Mira Syahfriena Amir Rawa
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Toshihiko Nogawa
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Akiko Okano
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Yushi Futamura
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Takemichi Nakamura
- Molecular Structure Characterization Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Habibah A Wahab
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
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15
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Sphaerostilbellins, New Antimicrobial Aminolipopeptide Peptaibiotics from Sphaerostilbella toxica. Biomolecules 2020; 10:biom10101371. [PMID: 32993102 PMCID: PMC7600149 DOI: 10.3390/biom10101371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/18/2020] [Accepted: 09/25/2020] [Indexed: 02/07/2023] Open
Abstract
Sphaerostilbella toxica is a mycoparasitic fungus that can be found parasitizing wood-decay basidiomycetes in the southern USA. Organic solvent extracts of fermented strains of S. toxica exhibited potent antimicrobial activity, including potent growth inhibition of human pathogenic yeasts Candida albicans and Cryptococcus neoformans, the respiratory pathogenic fungus Aspergillus fumigatus, and the Gram-positive bacterium Staphylococcus aureus. Bioassay-guided separations led to the purification and structure elucidation of new peptaibiotics designated as sphaerostilbellins A and B. Their structures were established mainly by analysis of NMR and HRMS data, verification of amino acid composition by Marfey's method, and by comparison with published data of known compounds. They incorporate intriguing structural features, including an N-terminal 2-methyl-3-oxo-tetradecanoyl (MOTDA) residue and a C-terminal putrescine residue. The minimal inhibitory concentrations for sphaerostilbellins A and B were measured as 2 μM each for C. neoformans, 1 μM each for A. fumigatus, and 4 and 2 μM, respectively, for C. albicans. Murine macrophage cells were unaffected at these concentrations.
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16
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Singh VP, Pathania AS, Kushwaha M, Singh S, Sharma V, Malik FA, Khan IA, Kumar A, Singh D, Vishwakarma RA. 14-Residue peptaibol velutibol A from Trichoderma velutinum: its structural and cytotoxic evaluation. RSC Adv 2020; 10:31233-31242. [PMID: 35520634 PMCID: PMC9056410 DOI: 10.1039/d0ra05780k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 08/08/2020] [Indexed: 11/21/2022] Open
Abstract
Velutibol A (1), a new 14-residue peptaibol was isolated from the Himalayan cold habitat fungus Trichoderma velutinum. The structural characterization was carried out by 1D and 2D NMR studies, and tandem mass studies, and Marfey's method aided in determining the stereochemistry of the amino acids. The CD analysis revealed folding of the peptide in a 310-helical conformation. The intramolecular H-bonding was determined by an NMR-VT experiment. Cytotoxic evaluation was carried out against a panel of cancer cell lines. The cell cycle assay was carried out on human myeloid leukaemia (HL-60) cells and revealed the formation of apoptotic bodies and DNA damage in a dose-dependent manner. Three other peptaibols namely velutibol B (2), velutibol C (3), and velutibol D (4) were also isolated in trace amounts from the psychotropic fungus and characterized through tandem mass spectroscopy and Marfey's analysis. Velutibol A (1), a new 14-residue peptaibol isolated from the Himalayan cold habitat fungus Trichoderma velutinum.![]()
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Affiliation(s)
- Varun Pratap Singh
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
- Department of Biotechnology
| | - Anup Singh Pathania
- Pharmacology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
| | - Manoj Kushwaha
- Quality Control & Quality Assurance Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
| | - Samsher Singh
- Clinical Microbiology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
| | - Vandana Sharma
- Quality Control & Quality Assurance Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
- Academy of Scientific and Innovative Research
| | - Fayaz A. Malik
- Pharmacology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
| | - Inshad A. Khan
- Clinical Microbiology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
- Department of Microbiology
| | - Anil Kumar
- Department of Biotechnology
- Faculty of Sciences
- Shri Mata Vaishno Devi University
- India
| | - Deepika Singh
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
- Quality Control & Quality Assurance Division
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180 001
- India
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17
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Oberlies NH, Knowles SL, Amrine CSM, Kao D, Kertesz V, Raja HA. Droplet probe: coupling chromatography to the in situ evaluation of the chemistry of nature. Nat Prod Rep 2019; 36:944-959. [PMID: 31112181 PMCID: PMC6640111 DOI: 10.1039/c9np00019d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Covering: up to 2019The chemistry of nature can be beautiful, inspiring, beneficial and poisonous, depending on perspective. Since the isolation of the first secondary metabolites roughly two centuries ago, much of the chemical research on natural products has been both reductionist and static. Typically, compounds were isolated and characterized from the extract of an entire organism from a single time point. While there could be subtexts to that approach, the general premise has been to determine the chemistry with very little in the way of tools to differentiate spatial and/or temporal changes in secondary metabolite profiles. However, the past decade has seen exponential advances in our ability to observe, measure, and visualize the chemistry of nature in situ. Many of those techniques have been reviewed in this journal, and most are tapping into the power of mass spectrometry to analyze a plethora of sample types. In nearly all of the other techniques used to study chemistry in situ, the element of chromatography has been eliminated, instead using various ionization sources to coax ions of the secondary metabolites directly into the mass spectrometer as a mixture. Much of that science has been driven by the great advances in ambient ionization techniques used with a suite of mass spectrometry platforms, including the alphabet soup from DESI to LAESI to MALDI. This review discusses the one in situ analysis technique that incorporates chromatography, being the droplet-liquid microjunction-surface sampling probe, which is more easily termed "droplet probe". In addition to comparing and contrasting the droplet probe with other techniques, we provide perspective on why scientists, particularly those steeped in natural products chemistry training, may want to include chromatography in in situ analyses. Moreover, we provide justification for droplet sampling, especially for samples with delicate and/or non-uniform topographies. Furthermore, while the droplet probe has been used the most in the analysis of fungal cultures, we digest a variety of other applications, ranging from cyanobacteria, to plant parts, and even delicate documents, such as herbarium specimens.
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Affiliation(s)
- Nicholas H Oberlies
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina, USA.
| | - Sonja L Knowles
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina, USA.
| | - Chiraz Soumia M Amrine
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina, USA.
| | - Diana Kao
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina, USA.
| | - Vilmos Kertesz
- Mass Spectrometry and Laser Spectroscopy Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Huzefa A Raja
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina, USA.
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18
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Aparicio-Cuevas MA, González MDC, Raja H, Rivero-Cruz I, Kurina SJ, Burdette JE, Oberlies NH, Figueroa M. Metabolites from the Marine-Facultative Aspergillus sp. MEXU 27854 and Gymnoascus hyalinosporus MEXU 29901 from Caleta Bay, Mexico. Tetrahedron Lett 2019; 60:1649-1652. [PMID: 32390667 DOI: 10.1016/j.tetlet.2019.05.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
During our ongoing research on fungal strains from unexplored sources, the reinvestigation of the CHCl3-MeOH extract of the marine-facultative Aspergillus sp. MEXU 27854 yielded a new N-methyl cyclic pentapeptide (1) along with known butyrolactone II and PF1233 A. In addition, from the marine-facultative Gymnoascus hyalinosporus MEXU 29901, a new alternariol glucoside, 10-O-[β-D-(4-methoxyl-glucopyranosyl)]-4-O-methylalternariol (2) and known alternariol 4-O-methyl ether, alternariol and beauvericin, were isolated. The structures of 1 and 2 were established by detailed spectroscopic data, and their absolute configuration was ascertained by Marfey's analysis and HRESIMS-MS/MS data for 1, and by chemical degradation and optical rotation analysis for 2.
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Affiliation(s)
| | | | - Huzefa Raja
- Department of Chemistry and Biochemistry, University of North Carolina Greensboro, Greensboro, North Carolina 27402, United States
| | - Isabel Rivero-Cruz
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
| | - Steven J Kurina
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Joanna E Burdette
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina Greensboro, Greensboro, North Carolina 27402, United States
| | - Mario Figueroa
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
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19
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Understanding the antimicrobial activity of water soluble γ-cyclodextrin/alamethicin complex. Colloids Surf B Biointerfaces 2018; 172:451-458. [DOI: 10.1016/j.colsurfb.2018.08.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/06/2018] [Accepted: 08/29/2018] [Indexed: 02/03/2023]
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20
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Al-Huniti MH, Rivera-Chávez J, Colón KL, Stanley JL, Burdette JE, Pearce CJ, Oberlies NH, Croatt MP. Development and Utilization of a Palladium-Catalyzed Dehydration of Primary Amides To Form Nitriles. Org Lett 2018; 20:6046-6050. [PMID: 30221526 PMCID: PMC6179452 DOI: 10.1021/acs.orglett.8b02422] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
![]()
A palladium(II) catalyst,
in the presence of Selectfluor, enables
the efficient and chemoselective transformation of primary amides
into nitriles. The amides can be attached to aromatic rings, heteroaromatic
rings, or aliphatic side chains, and the reactions tolerate steric
bulk and electronic modification. Dehydration of a peptaibol containing
three glutamine groups afforded structure–activity relationships
for each glutamine residue. Thus, this dehydration can act similarly
to an alanine scan for glutamines via synthetic mutation.
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Affiliation(s)
- Mohammed H Al-Huniti
- Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , 435 Sullivan Science Building , Greensboro , North Carolina 27402 , United States
| | - José Rivera-Chávez
- Institute of Chemistry, Universidad Nacional Autónoma de México , Circuito Exterior s/n , Coyacán , Mexico City 04510 , Mexico
| | - Katsuya L Colón
- Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , 435 Sullivan Science Building , Greensboro , North Carolina 27402 , United States
| | - Jarrod L Stanley
- Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , 435 Sullivan Science Building , Greensboro , North Carolina 27402 , United States
| | - Joanna E Burdette
- Department of Medicinal Chemistry and Pharmacognosy , University of Illinois at Chicago , 900 A. Ashland Avenue , Chicago , Illinois 60607 , United States
| | - Cedric J Pearce
- Mycosynthetix, Inc. , Suite 103, 505 Meadowlands Drive , Hillsborough , North Carolina 27278 , United States
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , 435 Sullivan Science Building , Greensboro , North Carolina 27402 , United States
| | - Mitchell P Croatt
- Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , 435 Sullivan Science Building , Greensboro , North Carolina 27402 , United States
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21
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Sica VP, Rees ER, Raja HA, Rivera-Chávez J, Burdette JE, Pearce CJ, Oberlies NH. In situ mass spectrometry monitoring of fungal cultures led to the identification of four peptaibols with a rare threonine residue. PHYTOCHEMISTRY 2017; 143:45-53. [PMID: 28772192 PMCID: PMC5603414 DOI: 10.1016/j.phytochem.2017.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 07/14/2017] [Accepted: 07/19/2017] [Indexed: 05/03/2023]
Abstract
Peptaibols are an intriguing class of fungal metabolites due both to their wide range of reported bioactivities and to the structural variability that can be generated by the exchange of variable amino acid building blocks. In an effort to streamline the discovery of structurally diverse peptaibols, a mass spectrometry surface sampling technique was applied to screen the chemistry of fungal cultures in situ. Four previously undescribed peptaibols, all containing a rare threonine residue, were identified from a fungal culture (MSX53554), which was identified as Nectriopsis Maire (Bionectriaceae, Hypocreales, Ascomycota). These compounds not only increased the known threonine-containing peptaibols by nearly 20%, but also, the threonine residue was situated in a unique place compared to the other reported threonine-containing peptaibols. After the initial in situ detection and characterization, a large-scale solid fermentation culture was grown. The four peptaibols were isolated and characterized by mass spectrometry. In addition, one of the peptaibols was fully characterized by NMR and amino acid analysis using Marfey's reagent and exhibited moderate in vitro anticancer activity.
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Affiliation(s)
- Vincent P Sica
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Evan R Rees
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - José Rivera-Chávez
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Joanna E Burdette
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Cedric J Pearce
- Mycosynthetix, Inc., 505 Meadowlands Dr., Suite103, Hillsborough, NC 27278, United States
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States.
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22
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Du L, Risinger AL, Mitchell CA, You J, Stamps BW, Pan N, King JB, Bopassa JC, Judge SIV, Yang Z, Stevenson BS, Cichewicz RH. Unique amalgamation of primary and secondary structural elements transform peptaibols into potent bioactive cell-penetrating peptides. Proc Natl Acad Sci U S A 2017; 114:E8957-E8966. [PMID: 29073092 PMCID: PMC5664515 DOI: 10.1073/pnas.1707565114] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Mass-spectrometry-based metabolomics and molecular phylogeny data were used to identify a metabolically prolific strain of Tolypocladium that was obtained from a deep-water Great Lakes sediment sample. An investigation of the isolate's secondary metabolome resulted in the purification of a 22-mer peptaibol, gichigamin A (1). This peptidic natural product exhibited an amino acid sequence including several β-alanines that occurred in a repeating ααβ motif, causing the compound to adopt a unique right-handed 311 helical structure. The unusual secondary structure of 1 was confirmed by spectroscopic approaches including solution NMR, electronic circular dichroism (ECD), and single-crystal X-ray diffraction analyses. Artificial and cell-based membrane permeability assays provided evidence that the unusual combination of structural features in gichigamins conferred on them an ability to penetrate the outer membranes of mammalian cells. Compound 1 exhibited potent in vitro cytotoxicity (GI50 0.55 ± 0.04 µM) and in vivo antitumor effects in a MIA PaCa-2 xenograft mouse model. While the primary mechanism of cytotoxicity for 1 was consistent with ion leakage, we found that it was also able to directly depolarize mitochondria. Semisynthetic modification of 1 provided several analogs, including a C-terminus-linked coumarin derivative (22) that exhibited appreciably increased potency (GI50 5.4 ± 0.1 nM), but lacked ion leakage capabilities associated with a majority of naturally occurring peptaibols such as alamethicin. Compound 22 was found to enter intact cells and induced cell death in a process that was preceded by mitochondrial depolarization.
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Affiliation(s)
- Lin Du
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, University of Oklahoma, Norman, OK 73019-5251
| | - April L Risinger
- Department of Pharmacology, University of Texas Health Science Center, San Antonio, TX 78229
- Cancer Therapy & Research Center, University of Texas Health Science Center, San Antonio, TX 78229
| | - Carter A Mitchell
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, University of Oklahoma, Norman, OK 73019-5251
| | - Jianlan You
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, University of Oklahoma, Norman, OK 73019-5251
| | - Blake W Stamps
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019-5251
| | - Ning Pan
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
| | - Jarrod B King
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, University of Oklahoma, Norman, OK 73019-5251
| | - Jean C Bopassa
- Department of Physiology, School of Medicine, University of Texas Health Science Center, San Antonio, TX 78229
| | - Susan I V Judge
- Department of Biochemistry, High Throughput Screening Facility, Center for Innovative Drug Discovery, University of Texas Health Science Center, San Antonio, TX 78229
- CytoBioscience Incorporated, San Antonio, TX 78229
| | - Zhibo Yang
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
| | - Bradley S Stevenson
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019-5251
| | - Robert H Cichewicz
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019-5251;
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, University of Oklahoma, Norman, OK 73019-5251
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23
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Rivera-Chávez J, Raja HA, Graf TN, Gallagher JM, Metri P, Xue D, Pearce CJ, Oberlies NH. Prealamethicin F50 and related peptaibols from Trichoderma arundinaceum: Validation of their authenticity via in situ chemical analysis. RSC Adv 2017; 7:45733-45751. [PMID: 29379602 PMCID: PMC5786278 DOI: 10.1039/c7ra09602j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the field of natural products chemistry, a common question pertains to the authenticity of an isolated compound, i.e. are the interesting side chains biosynthesized naturally or an artefact of the isolation/purification processes? The droplet-liquid microjunction-surface sampling probe (droplet-LMJ-SSP) coupled to a hyphenated system (UPLC-UV-HRESIMS) empowers the analysis of natural product sources in situ, providing data on the biosynthetic timing and spatial distribution of secondary metabolites. In this study the droplet-LMJ-SSP was utilized to validate the authenticity of two new peptaibols (2 and 3) as biosynthesized secondary metabolites, even though both them had structural features that could be perceived as artefacts. Compounds 2 and 3 were isolated from the scaled up fermentation of Trichoderma arundinaceum (strain MSX70741), along with a new member of the trichobrevin BIII complex (1), and four known compounds (4-7). The structures of the isolates were established using a set of spectroscopic and spectrometric methods, and their absolute configurations were determined by Marfey's analysis. The cytotoxic activity of compounds 1, 3, 4 and 6 was evaluated against a panel of cancer cell lines, where cytotoxic activity in the single digit μM range was observed.
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Affiliation(s)
- José Rivera-Chávez
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Tyler N Graf
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Jacklyn M Gallagher
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Prashant Metri
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
| | - Ding Xue
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
| | | | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
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24
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Rivera-Chávez J, Raja HA, Graf TN, Burdette JE, Pearce CJ, Oberlies NH. Biosynthesis of Fluorinated Peptaibols Using a Site-Directed Building Block Incorporation Approach. JOURNAL OF NATURAL PRODUCTS 2017; 80:1883-1892. [PMID: 28594169 PMCID: PMC5485375 DOI: 10.1021/acs.jnatprod.7b00189] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Indexed: 05/20/2023]
Abstract
Synthetic biological approaches, such as site-directed biosynthesis, have contributed to the expansion of the chemical space of natural products, making possible the biosynthesis of unnatural metabolites that otherwise would be difficult to access. Such methods may allow the incorporation of fluorine, an atom rarely found in nature, into complex secondary metabolites. Organofluorine compounds and secondary metabolites have both played pivotal roles in the development of drugs; however, their discovery and development are often via nonintersecting tracks. In this context, we used the biosynthetic machinery of Trichoderma arundinaceum (strain MSX70741) to incorporate a fluorine atom into peptaibol-type molecules in a site-selective manner. Thus, fermentation of strain MSX70741 in media containing ortho- and meta-F-phenylalanine resulted in the biosynthesis of two new fluorine-containing alamethicin F50 derivatives. The fluorinated products were characterized using spectroscopic (1D and 2D NMR, including 19F) and spectrometric (HRESIMS/MSn) methods, and their absolute configurations were established by Marfey's analysis. Fluorine-containing alamethicin F50 derivatives exhibited potency analogous to the nonfluorinated parent when evaluated against a panel of human cancer cell lines. Importantly, the biosynthesis of fluorinated alamethicin F50 derivatives by strain MSX70741 was monitored in situ using a droplet-liquid microjunction-surface sampling probe coupled to a hyphenated system.
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Affiliation(s)
- José Rivera-Chávez
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27412, United States
| | - Huzefa A. Raja
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27412, United States
| | - Tyler N. Graf
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27412, United States
| | - Joanna E. Burdette
- Department
of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Cedric J. Pearce
- Mycosynthetix, Inc., 505 Meadowlands Drive, Suite 103, Hillsborough, North Carolina 27278, United States
| | - Nicholas H. Oberlies
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27412, United States
- E-mail: . Tel: 336-334-5474
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25
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Raja HA, Paguigan ND, Fournier J, Oberlies NH. Additions to Lindgomyces (Lindgomycetaceae, Pleosporales, Dothideomycetes), including two new species occurring on submerged wood from North Carolina, USA, with notes on secondary metabolite profiles. Mycol Prog 2017. [DOI: 10.1007/s11557-017-1282-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Kinghorn AD, DE Blanco EJC, Lucas DM, Rakotondraibe HL, Orjala J, Soejarto DD, Oberlies NH, Pearce CJ, Wani MC, Stockwell BR, Burdette JE, Swanson SM, Fuchs JR, Phelps MA, Xu L, Zhang X, Shen YY. Discovery of Anticancer Agents of Diverse Natural Origin. Anticancer Res 2017; 36:5623-5637. [PMID: 27793884 DOI: 10.21873/anticanres.11146] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 09/20/2016] [Indexed: 01/21/2023]
Abstract
Recent progress is described in an ongoing collaborative multidisciplinary research project directed towards the purification, structural characterization, chemical modification, and biological evaluation of new potential natural product anticancer agents obtained from a diverse group of organisms, comprising tropical plants, aquatic and terrestrial cyanobacteria, and filamentous fungi. Information is provided on how these organisms are collected and processed. The types of bioassays are indicated in which initial extracts, chromatographic fractions, and purified isolated compounds of these acquisitions are tested. Several promising biologically active lead compounds from each major organism class investigated are described, and these may be seen to be representative of a very wide chemical diversity.
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Affiliation(s)
- A Douglas Kinghorn
- College of Pharmacy, The Ohio State University, Columbus, OH, U.S.A. .,Comprehensive Cancer Center, The Ohio State University, Columbus, OH, U.S.A
| | | | - David M Lucas
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, U.S.A.,College of Medicine, The Ohio State University, Columbus, OH, U.S.A
| | | | - Jimmy Orjala
- College of Pharmacy, University of Illinois at Chicago, Chicago, IL, U.S.A
| | - D Doel Soejarto
- College of Pharmacy, University of Illinois at Chicago, Chicago, IL, U.S.A.,Field Museum of Natural History, Chicago, IL, U.S.A
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, U.S.A
| | | | - Mansukh C Wani
- Research Triangle Institute, Research Triangle Park, NC, U.S.A
| | - Brent R Stockwell
- Department of Biological Sciences, Columbia University, New York, NY, U.S.A.,Department of Chemistry, Columbia University, New York, NY, U.S.A
| | - Joanna E Burdette
- College of Pharmacy, University of Illinois at Chicago, Chicago, IL, U.S.A
| | - Steven M Swanson
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI, U.S.A
| | - James R Fuchs
- College of Pharmacy, The Ohio State University, Columbus, OH, U.S.A
| | - Mitchell A Phelps
- College of Pharmacy, The Ohio State University, Columbus, OH, U.S.A.,Comprehensive Cancer Center, The Ohio State University, Columbus, OH, U.S.A
| | - Lihui Xu
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, U.S.A
| | - Xiaoli Zhang
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, U.S.A.,College of Medicine, The Ohio State University, Columbus, OH, U.S.A
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27
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Siow A, Hung KY, Harris PWR, Brimble MA. Solid-Phase Synthesis of the Peptaibol Alamethicin U-22324 by Using a Double-Linker Strategy. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Andrew Siow
- School of Biological Sciences; The University of Auckland; 3A Symonds St 1142 Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; School of Biological Sciences; The University of Auckland; 1142 Auckland New Zealand
| | - Kuo-yuan Hung
- School of Biological Sciences; The University of Auckland; 3A Symonds St 1142 Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; School of Biological Sciences; The University of Auckland; 1142 Auckland New Zealand
| | - Paul W. R. Harris
- School of Biological Sciences; The University of Auckland; 3A Symonds St 1142 Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; School of Biological Sciences; The University of Auckland; 1142 Auckland New Zealand
| | - Margaret A. Brimble
- School of Biological Sciences; The University of Auckland; 3A Symonds St 1142 Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; School of Biological Sciences; The University of Auckland; 1142 Auckland New Zealand
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28
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A new species of Trichoderma hypoxylon harbours abundant secondary metabolites. Sci Rep 2016; 6:37369. [PMID: 27869187 PMCID: PMC5116760 DOI: 10.1038/srep37369] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 10/27/2016] [Indexed: 02/08/2023] Open
Abstract
Some species of Trichoderma are fungicolous on fungi and have been extensively studied and commercialized as biocontrol agents. Multigene analyses coupled with morphology, resulted in the discovery of T. hypoxylon sp. nov., which was isolated from surface of the stroma of Hypoxylon anthochroum. The new taxon produces Trichoderma- to Verticillium-like conidiophores and hyaline conidia. Phylogenetic analyses based on combined ITS, TEF1-α and RPB2 sequence data indicated that T. hypoxylon is a well-distinguished species with strong bootstrap support in the polysporum group. Chemical assessment of this species reveals a richness of secondary metabolites with trichothecenes and epipolythiodiketopiperazines as the major compounds. The fungicolous life style of T. hypoxylon and the production of abundant metabolites are indicative of the important ecological roles of this species in nature.
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Abstract
AIM Fungi are valuable resources for bioactive secondary metabolites. However, the chemical space of fungal secondary metabolites has been studied only on a limited basis. Herein, we report a comprehensive chemoinformatic analysis of a unique set of 207 fungal metabolites isolated and characterized in a USA National Cancer Institute funded drug discovery project. RESULTS Comparison of the molecular complexity of the 207 fungal metabolites with approved anticancer and nonanticancer drugs, compounds in clinical studies, general screening compounds and molecules Generally Recognized as Safe revealed that fungal metabolites have high degree of complexity. Molecular fingerprints showed that fungal metabolites are as structurally diverse as other natural products and have, in general, drug-like physicochemical properties. CONCLUSION Fungal products represent promising candidates to expand the medicinally relevant chemical space. This work is a significant expansion of an analysis reported years ago for a smaller set of compounds (less than half of the ones included in the present work) from filamentous fungi using different structural properties.
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30
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Dong P, Zhou Y, He W, Hua D. A strategy for enhanced antibacterial activity against Staphylococcus aureus by the assembly of alamethicin with a thermo-sensitive polymeric carrier. Chem Commun (Camb) 2016; 52:896-9. [PMID: 26579549 DOI: 10.1039/c5cc07054f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We demonstrate here a strategy for enhanced antibacterial activity against microbial strains by the assembly of antimicrobial peptides with a temperature-responsive polymeric carrier. The assembly complex was less toxic to human cells and more stable to enzymatic cleavage. This work may provide a promising drug delivery system for antimicrobial peptides.
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Affiliation(s)
- Ping Dong
- School for Radiological and Interdisciplinary Sciences (RAD-X) & College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Yuan Zhou
- School for Radiological and Interdisciplinary Sciences (RAD-X) & College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Weiwei He
- School for Radiological and Interdisciplinary Sciences (RAD-X) & College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. and Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Daoben Hua
- School for Radiological and Interdisciplinary Sciences (RAD-X) & College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. and Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China
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31
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Paguigan ND, Raja HA, Day CS, Oberlies NH. Acetophenone derivatives from a freshwater fungal isolate of recently described Lindgomyces madisonensis (G416). PHYTOCHEMISTRY 2016; 126:59-65. [PMID: 26988728 DOI: 10.1016/j.phytochem.2016.03.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 02/02/2016] [Accepted: 03/08/2016] [Indexed: 06/05/2023]
Abstract
The exploration of freshwater ascomycetes, which have undergone only limited investigation, may provide opportunities both to characterize new genera/species of fungi and to uncover new chemical diversity. In this study, seven acetophenone derivatives, madisone, 4'-methoxymadisone, dehydromadisone, 2″-methoxymadisone, dihydroallovisnaginone, dimadisone, and 4'-methoxydimadisone were characterized from an organic extract of a recently described Lindgomyces madisonensis (G416) culture, which was isolated from submerged wood collected in a stream in North Carolina. Madisone, dehydromadisone, 2″-methoxymadisone, dimadisone and 4'-demethoxydimadisone have not been reported previously, while 4'-methoxymadisone and dihydroallovisnaginone were previously unknown as natural products. Their structures were assigned on the basis of NMR and HRESIMS data, with the structure of madisone supported by X-ray crystallography. The antimicrobial activities of madisone, 4'-methoxymadisone and dihydroallovisnaginone were evaluated against a panel of bacteria and fungi. A heat map analysis of the surface of a G416 culture showed that most of the isolated compounds concentrated in the guttate compared with the vegetative mycelium of the fungus.
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Affiliation(s)
- Noemi D Paguigan
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, PO Box 26170, 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, PO Box 26170, Greensboro, NC 27402-6170, USA
| | - Cynthia S Day
- Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109, USA
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Patricia A. Sullivan Science Building, PO Box 26170, Greensboro, NC 27402-6170, USA.
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32
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Kaur A, Raja HA, Swenson DC, Agarwal R, Deep G, Falkinham JO, Oberlies NH. Talarolutins A-D: Meroterpenoids from an endophytic fungal isolate of Talaromyces minioluteus. PHYTOCHEMISTRY 2016; 126:4-10. [PMID: 27048854 PMCID: PMC4861051 DOI: 10.1016/j.phytochem.2016.03.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/18/2016] [Accepted: 03/25/2016] [Indexed: 05/27/2023]
Abstract
Four meroterpenoids [talarolutins A-D] and one known compound [purpurquinone A] were characterized from an endophytic fungal isolate of Talaromyces minioluteus (G413), which was obtained from the leaves of the medicinal plant milk thistle [Silybum marianum (L.) Gaertn. (Asteraceae)]. The structures of talarolutins A-D were determined by the analysis of various NMR and MS techniques. The relative and absolute configuration of talarolutin A was determined by X-ray diffraction analysis. A combination of NOESY data and comparisons of ECD spectra were employed to assign the relative and absolute configuration of the other analogs. Talarolutins B-D were tested for cytotoxicity against human prostate carcinoma (PC-3) cell line, antimicrobial activity, and induction of quinone reductase; no notable bioactivity was observed in any assay.
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Affiliation(s)
- Amninder Kaur
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Dale C Swenson
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA
| | - Rajesh Agarwal
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO 80045, USA
| | - Gagan Deep
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO 80045, USA
| | - Joseph O Falkinham
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA.
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33
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Blanco‐Míguez A, Gutiérrez‐Jácome A, Pérez‐Pérez M, Pérez‐Rodríguez G, Catalán‐García S, Fdez‐Riverola F, Lourenço A, Sánchez B. From amino acid sequence to bioactivity: The biomedical potential of antitumor peptides. Protein Sci 2016; 25:1084-95. [PMID: 27010507 PMCID: PMC4941772 DOI: 10.1002/pro.2927] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 03/18/2016] [Accepted: 03/22/2016] [Indexed: 12/25/2022]
Abstract
Chemoprevention is the use of natural and/or synthetic substances to block, reverse, or retard the process of carcinogenesis. In this field, the use of antitumor peptides is of interest as, (i) these molecules are small in size, (ii) they show good cell diffusion and permeability, (iii) they affect one or more specific molecular pathways involved in carcinogenesis, and (iv) they are not usually genotoxic. We have checked the Web of Science Database (23/11/2015) in order to collect papers reporting on bioactive peptide (1691 registers), which was further filtered searching terms such as "antiproliferative," "antitumoral," or "apoptosis" among others. Works reporting the amino acid sequence of an antiproliferative peptide were kept (60 registers), and this was complemented with the peptides included in CancerPPD, an extensive resource for antiproliferative peptides and proteins. Peptides were grouped according to one of the following mechanism of action: inhibition of cell migration, inhibition of tumor angiogenesis, antioxidative mechanisms, inhibition of gene transcription/cell proliferation, induction of apoptosis, disorganization of tubulin structure, cytotoxicity, or unknown mechanisms. The main mechanisms of action of those antiproliferative peptides with known amino acid sequences are presented and finally, their potential clinical usefulness and future challenges on their application is discussed.
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Affiliation(s)
- Aitor Blanco‐Míguez
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
| | - Alberto Gutiérrez‐Jácome
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
| | - Martín Pérez‐Pérez
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
| | - Gael Pérez‐Rodríguez
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
| | - Sandra Catalán‐García
- Asturias, INDRA Software LabsC/Jimena Fernández De La Vega, 140 P. Científico Tecnológico, EdGijón33203Spain
| | - Florentino Fdez‐Riverola
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
| | - Anália Lourenço
- ESEI ‐ Escuela Superior De Ingeniería Informática, Edificio Politécnico, Campus Universitario as Lagoas S/N, Universidad De VigoOurense32004Spain
- Centre of Biological Engineering, University of MinhoCampus De GualtarBraga4710‐057Portugal
| | - Borja Sánchez
- Department of Microbiology and Biochemistry of Dairy ProductsInstituto De Productos Lácteos De Asturias (IPLA), Consejo Superior De Investigaciones Científicas (CSIC)VillaviciosaAsturiasSpain
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34
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Mohamed-Benkada M, François Pouchus Y, Vérité P, Pagniez F, Caroff N, Ruiz N. Identification and Biological Activities of Long-Chain Peptaibols Produced by a Marine-Derived Strain ofTrichoderma longibrachiatum. Chem Biodivers 2016; 13:521-30. [DOI: 10.1002/cbdv.201500159] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 12/11/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Mustapha Mohamed-Benkada
- Département de Biotechnologie; Faculté des Sciences de la Nature et de la Vie; Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf (USTO-MB); El Mnaouar, B.P. 1505 Bir El Djir 31000 Oran Algeria
| | | | - Philippe Vérité
- Laboratoire de Chimie Analytique; Faculté de Médecine et Pharmacie; Université de Rouen; FR-76000 Rouen
| | - Fabrice Pagniez
- Laboratoire de Parasitologie et Mycologie Médicale, IICiMed; Faculté de Pharmacie; Université de Nantes; FR-44000 Nantes
| | - Nathalie Caroff
- Laboratoire Thérapeutiques Cliniques et Expérimentales des Infections; Faculté de Médecine; Université de Nantes; FR-44000 Nantes
| | - Nicolas Ruiz
- Faculté de Pharmacie, MMS; Université de Nantes; FR-44000 Nantes
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Otto A, Laub A, Wendt L, Porzel A, Schmidt J, Palfner G, Becerra J, Krüger D, Stadler M, Wessjohann L, Westermann B, Arnold N. Chilenopeptins A and B, Peptaibols from the Chilean Sepedonium aff. chalcipori KSH 883. JOURNAL OF NATURAL PRODUCTS 2016; 79:929-38. [PMID: 26953507 DOI: 10.1021/acs.jnatprod.5b01018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The Chilean Sepedonium aff. chalcipori strain KSH 883, isolated from the endemic Boletus loyo Philippi, was studied in a polythetic approach based on chemical, molecular, and biological data. A taxonomic study of the strain using molecular data of the ITS, EF1-α, and RPB2 barcoding genes confirmed the position of the isolated strain within the S. chalcipori clade, but also suggested the separation of this clade into three different species. Two new linear 15-residue peptaibols, named chilenopeptins A (1) and B (2), together with the known peptaibols tylopeptins A (3) and B (4) were isolated from the semisolid culture of strain KSH 883. The structures of 1 and 2 were elucidated on the basis of HRESIMS(n) experiments in conjunction with comprehensive 1D and 2D NMR analysis. Thus, the sequence of chilenopeptin A (1) was identified as Ac-Aib(1)-Ser(2)-Trp(3)-Aib(4)-Pro(5)-Leu(6)-Aib(7)-Aib(8)-Gln(9)-Aib(10)-Aib(11)-Gln(12)-Aib(13)-Leu(14)-Pheol(15), while chilenopeptin B (2) differs from 1 by the replacement of Trp(3) by Phe(3). Additionally, the total synthesis of 1 and 2 was accomplished by a solid-phase approach, confirming the absolute configuration of all chiral amino acids as l. Both the chilenopeptins (1 and 2) and tylopeptins (3 and 4) were evaluated for their potential to inhibit the growth of phytopathogenic organisms.
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Affiliation(s)
- Alexander Otto
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Annegret Laub
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Lucile Wendt
- Department of Microbial Drugs, Helmholtz Centre for Infection Research , Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Jürgen Schmidt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Götz Palfner
- Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepción , Casilla 160-C, Concepción, Chile
| | - José Becerra
- Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepción , Casilla 160-C, Concepción, Chile
| | - Dirk Krüger
- Department of Soil Ecology, Helmholtz Centre for Environmental Research , Theodor-Lieser-Strasse 4, D-06120 Halle (Saale), Germany
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research , Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Ludger Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 2, D-06120 Halle (Saale), Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 2, D-06120 Halle (Saale), Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
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Abstract
Haemonchus contortus is an important pathogen of small ruminants and is therefore a crucially important target for anthelmintic chemotherapy. Its large size and fecundity have been exploited for the development of in vitro screens for anthelmintic discovery that employ larval and adult stages in several formats. The ability of the parasite to develop to the young adult stage in Mongolian jirds (Meriones unguiculatus) provides a useful small animal model that can be used to screen compounds prior to their evaluation in infected sheep. This chapter summarizes the use of H. contortus for anthelmintic discovery, offers a perspective on current strategies in this area and suggests research challenges that could lead to improvements in the anthelmintic discovery process.
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Sy-Cordero AA, Figueroa M, Raja HA, Meza Aviña ME, Croatt MP, Adcock AF, Kroll DJ, Wani MC, Pearce CJ, Oberlies NH. Spiroscytalin, a new tetramic acid and other metabolites of mixed biogenesis from Scytalidium cuboideum. Tetrahedron 2015; 71:8899-904. [PMID: 26525642 DOI: 10.1016/j.tet.2015.09.073] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Spiroscytalin (1), a new tetramic acid that possesses an uncommon spiro-ring fusion between a polyketide-derived octalin ring system and a 2,4-pyrrolidinedione, along with two known compounds, leporin B (2) and purpactin A (3), were isolated from a solid phase culture of the fungus Scytalidium cuboideum (MSX 68345). The molecular connectivity of 1-3 was determined using NMR spectroscopy and mass spectrometry. The relative configurations of 1 and 2 were determined by NOESY experiments. The absolute configuration of 1 was determined by electronic circular dichroism (ECD) via a combination of experimental measurements and computational calculations. While leporin B was known, it displayed activities that had not been reported previously, including cytotoxicity against three human tumor cell lines and antibacterial activity against Candida albicans and Staphylococcus aureus.
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Affiliation(s)
- Arlene A Sy-Cordero
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Mario Figueroa
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico DF 04510, Mexico
| | - Huzefa A Raja
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Maria Elena Meza Aviña
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Mitchell P Croatt
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Audrey F Adcock
- Department of Pharmaceutical Sciences, BRITE, North Carolina Central University, Durham, NC 27707, United States
| | - David J Kroll
- Department of Pharmaceutical Sciences, BRITE, North Carolina Central University, Durham, NC 27707, United States
| | - Mansukh C Wani
- Natural Products Laboratory, Research Triangle Institute, Research Triangle Park, NC 27709, United States
| | | | - Nicholas H Oberlies
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
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Gufford BT, Graf TN, Paguigan ND, Oberlies NH, Paine MF. Chemoenzymatic Synthesis, Characterization, and Scale-Up of Milk Thistle Flavonolignan Glucuronides. Drug Metab Dispos 2015; 43:1734-43. [PMID: 26316643 PMCID: PMC4613946 DOI: 10.1124/dmd.115.066076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 08/26/2015] [Indexed: 11/22/2022] Open
Abstract
Plant-based therapeutics, including herbal products, continue to represent a growing facet of the contemporary health care market. Mechanistic descriptions of the pharmacokinetics and pharmacodynamics of constituents composing these products remain nascent, particularly for metabolites produced following herbal product ingestion. Generation and characterization of authentic metabolite standards are essential to improve the quantitative mechanistic understanding of herbal product disposition in both in vitro and in vivo systems. Using the model herbal product, milk thistle, the objective of this work was to biosynthesize multimilligram quantities of glucuronides of select constituents (flavonolignans) to fill multiple knowledge gaps in the understanding of herbal product disposition and action. A partnership between clinical pharmacology and natural products chemistry expertise was leveraged to optimize reaction conditions for efficient glucuronide formation and evaluate alternate enzyme and reagent sources to improve cost effectiveness. Optimized reaction conditions used at least one-fourth the amount of microsomal protein (from bovine liver) and cofactor (UDP glucuronic acid) compared with typical conditions using human-derived subcellular fractions, providing substantial cost savings. Glucuronidation was flavonolignan-dependent. Silybin A, silybin B, isosilybin A, and isosilybin B generated five, four, four, and three monoglucuronides, respectively. Large-scale synthesis (40 mg of starting material) generated three glucuronides of silybin A: silybin A-7-O-β-D-glucuronide (15.7 mg), silybin A-5-O-β-D-glucuronide (1.6 mg), and silybin A-4´´-O-β-D-glucuronide (11.1 mg). This optimized, cost-efficient method lays the foundation for a systematic approach to synthesize and characterize herbal product constituent glucuronides, enabling an improved understanding of mechanisms underlying herbal product disposition and action.
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Affiliation(s)
- Brandon T Gufford
- Experimental and Systems Pharmacology, College of Pharmacy, Washington State University, Spokane, Washington (B.T.G., M.F.P.); and Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina (T.N.G., N.D.P., N.H.O.)
| | - Tyler N Graf
- Experimental and Systems Pharmacology, College of Pharmacy, Washington State University, Spokane, Washington (B.T.G., M.F.P.); and Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina (T.N.G., N.D.P., N.H.O.)
| | - Noemi D Paguigan
- Experimental and Systems Pharmacology, College of Pharmacy, Washington State University, Spokane, Washington (B.T.G., M.F.P.); and Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina (T.N.G., N.D.P., N.H.O.)
| | - Nicholas H Oberlies
- Experimental and Systems Pharmacology, College of Pharmacy, Washington State University, Spokane, Washington (B.T.G., M.F.P.); and Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina (T.N.G., N.D.P., N.H.O.)
| | - Mary F Paine
- Experimental and Systems Pharmacology, College of Pharmacy, Washington State University, Spokane, Washington (B.T.G., M.F.P.); and Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina (T.N.G., N.D.P., N.H.O.)
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Otto A, Laub A, Porzel A, Schmidt J, Wessjohann L, Westermann B, Arnold N. Isolation and Total Synthesis of Albupeptins A-D: 11-Residue Peptaibols from the FungusGliocladium album. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Sica V, Raja HA, El-Elimat T, Kertesz V, Van Berkel GJ, Pearce CJ, Oberlies NH. Dereplicating and Spatial Mapping of Secondary Metabolites from Fungal Cultures in Situ. JOURNAL OF NATURAL PRODUCTS 2015; 78:1926-36. [PMID: 26192135 PMCID: PMC4570219 DOI: 10.1021/acs.jnatprod.5b00268] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Ambient ionization mass spectrometry techniques have recently become prevalent in natural product research due to their ability to examine secondary metabolites in situ. These techniques retain invaluable spatial and temporal details that are lost through traditional extraction processes. However, most ambient ionization techniques do not collect mutually supportive data, such as chromatographic retention times and/or UV/vis spectra, and this can limit the ability to identify certain metabolites, such as differentiating isomers. To overcome this, the droplet-liquid microjunction-surface sampling probe (droplet-LMJ-SSP) was coupled with UPLC-PDA-HRMS-MS/MS, thus providing separation, retention times, MS data, and UV/vis data used in traditional dereplication protocols. By capturing these mutually supportive data, the identity of secondary metabolites can be confidently and rapidly assigned in situ. Using the droplet-LMJ-SSP, a protocol was constructed to analyze the secondary metabolite profile of fungal cultures without any sample preparation. The results demonstrate that fungal cultures can be dereplicated from the Petri dish, thus identifying secondary metabolites, including isomers, and confirming them against reference standards. Furthermore, heat maps, similar to mass spectrometry imaging, can be used to ascertain the location and relative concentration of secondary metabolites directly on the surface and/or surroundings of a fungal culture.
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Affiliation(s)
- Vincent
P. Sica
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Huzefa A. Raja
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Tamam El-Elimat
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Vilmos Kertesz
- Organic
and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gary J. Van Berkel
- Organic
and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Cedric J. Pearce
- Mycosynthetix,
Inc., 505 Meadowlands
Drive, Suite 103, Hillsborough, North Carolina 27278, United States
| | - Nicholas H. Oberlies
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
- Tel: 336-334-5474. E-mail:
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Stach M, Weidkamp AJ, Yang SH, Hung KY, Furkert DP, Harris PWR, Smaill JB, Patterson AV, Brimble MA. Improved Strategy for the Synthesis of the Anticancer Agent Culicinin D. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500872] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kaur A, Raja HA, Darveaux BA, Chen WL, Swanson SM, Pearce CJ, Oberlies NH. New diketopiperazine dimer from a filamentous fungal isolate of Aspergillus sydowii. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:616-9. [PMID: 26040447 PMCID: PMC4692248 DOI: 10.1002/mrc.4254] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/31/2015] [Accepted: 04/06/2015] [Indexed: 05/23/2023]
Affiliation(s)
- Amninder Kaur
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27402, United States
| | - Huzefa A. Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27402, United States
| | - Blaise A. Darveaux
- Mycosynthetix, Inc., 505 Meadowlands Drive, Suite 103, Hillsborough, North Carolina 27278, United States
| | - Wei-Lun Chen
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Steven M. Swanson
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin - Madison, Madison, WI, 53705, United States
| | - Cedric J. Pearce
- Mycosynthetix, Inc., 505 Meadowlands Drive, Suite 103, Hillsborough, North Carolina 27278, United States
| | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27402, United States
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Bills G, Li Y, Chen L, Yue Q, Niu XM, An Z. New insights into the echinocandins and other fungal non-ribosomal peptides and peptaibiotics. Nat Prod Rep 2014; 31:1348-75. [PMID: 25156669 DOI: 10.1039/c4np00046c] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Non-ribosomal peptide synthetases (NRPSs) are a primary modality for fungal peptidic natural product assembly and are responsible for some of the best known, most useful, and most destructive fungal metabolites. Through genome sequencing and computer-assisted recognition of modular motifs of catalytic domains, one can now confidently identify most NRPS biosynthetic genes of a fungal strain. The biosynthetic gene clusters responsible for two of the most important classes of NRP fungal derived drugs, cyclosporine and the echinocandins, have been recently characterized by genomic sequencing and annotation. Complete biosynthetic gene clusters for the pneumocandins and echinocandins have been mapped at the genetic level and functionally characterized to some extent. Genomic sequencing of representative strains of most of the variants in the echinocandin family, including the wild-type of the three fungal strains employed for industrial-scale production of caspofungin, micafungin and anidulofungin, has enabled characterization of the basic architecture of the echinocandin NRPS pathways. A comparative analysis of how pathway genes cause variations in lipoinitiation, biosynthesis of the non-proteinogenic amino acids, amino acid substitutions, and hydroxylations and sulfonations of the core peptide and contribute to the molecular diversity of the family is presented. We also review new information on the natural functions of NRPs, the differences between fungal and bacterial NRPSs, and functional characterization of selected NRPS gene clusters. Continuing discovery of the new fungal nonribosomal peptides has contributed new structural diversity and potential insights into their biological functions among other natural peptides and peptaibiotics. We therefore provide an update on new peptides, depsipeptides and peptaibols discovered in the Fungi since 2009.
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Affiliation(s)
- Gerald Bills
- Texas Therapeutics Institute, The Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Centre at Houston, Houston, Texas 77054, USA.
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Röhrich CR, Jaklitsch WM, Voglmayr H, Iversen A, Vilcinskas A, Nielsen KF, Thrane U, von Döhren H, Brückner H, Degenkolb T. Front line defenders of the ecological niche! Screening the structural diversity of peptaibiotics from saprotrophic and fungicolous Trichoderma/Hypocrea species. FUNGAL DIVERS 2014; 69:117-146. [PMID: 25722662 PMCID: PMC4338523 DOI: 10.1007/s13225-013-0276-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Approximately 950 individual sequences of non-ribosomally biosynthesised peptides are produced by the genus Trichoderma/Hypocrea that belong to a perpetually growing class of mostly linear antibiotic oligopeptides, which are rich in the non-proteinogenic α-aminoisobutyric acid (Aib). Thus, they are comprehensively named peptaibiotics. Notably, peptaibiotics represent ca. 80 % of the total inventory of secondary metabolites currently known from Trichoderma/Hypocrea. Their unique membrane-modifying bioactivity results from amphipathicity and helicity, thus making them ideal candidates in assisting both colonisation and defence of the natural habitats by their fungal producers. Despite this, reports on the in vivo-detection of peptaibiotics have scarcely been published in the past. In order to evaluate the significance of peptaibiotic production for a broader range of potential producers, we screened nine specimens belonging to seven hitherto uninvestigated fungicolous or saprotrophic Trichoderma/Hypocrea species by liquid chromatography coupled to electrospray high resolution mass spectrometry. Sequences of peptaibiotics found were independently confirmed by analysing the peptaibiome of pure agar cultures obtained by single-ascospore isolation from the specimens. Of the nine species examined, five were screened positive for peptaibiotics. A total of 78 peptaibiotics were sequenced, 56 (=72 %) of which are new. Notably, dihydroxyphenylalaninol and O-prenylated tyrosinol, two C-terminal residues, which have not been reported for peptaibiotics before, were found as well as new and recurrent sequences carrying the recently described tyrosinol residue at their C-terminus. The majority of peptaibiotics sequenced are 18- or 19-residue peptaibols. Structural homologies with 'classical representatives' of subfamily 1 (SF1)-peptaibiotics argue for the formation of transmembrane ion channels, which are prone to facilitate the producer capture and defence of its substratum.
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Affiliation(s)
- Christian R Röhrich
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Winchesterstrasse 2, 35394 Giessen, Germany. Present Address: AB SCIEX Germany GmbH, Landwehrstrasse 54, 64293 Darmstadt, Germany
| | - Walter M Jaklitsch
- Department of Systematic and Evolutionary Botany, Faculty Centre of Biodiversity, University of Vienna, Rennweg 14, 1030 Vienna, Austria
| | - Hermann Voglmayr
- Department of Systematic and Evolutionary Botany, Faculty Centre of Biodiversity, University of Vienna, Rennweg 14, 1030 Vienna, Austria
| | - Anita Iversen
- Department of Systems Biology, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs. Lyngby, Denmark. Present Address: Danish Emergency Management Agency, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Andreas Vilcinskas
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Winchesterstrasse 2, 35394 Giessen, Germany; Interdisciplinary Research Centre for BioSystems, Land Use and Nutrition (IFZ), Department of Applied Entomology, Institute of Phytopathology and Applied Zoology (IPAZ), University of Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Kristian Fog Nielsen
- Department of Systems Biology, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs. Lyngby, Denmark
| | - Ulf Thrane
- Department of Systems Biology, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs. Lyngby, Denmark
| | - Hans von Döhren
- Biochemistry and Molecular Biology OE 2, Institute of Chemistry, Technical University of Berlin, Franklinstrasse 29, 10587 Berlin, Germany
| | - Hans Brückner
- Interdisciplinary Research Centre for BioSystems, Land Use and Nutrition (IFZ), Department of Food Sciences, Institute of Nutritional Science, University of Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Thomas Degenkolb
- Interdisciplinary Research Centre for BioSystems, Land Use and Nutrition (IFZ), Department of Applied Entomology, Institute of Phytopathology and Applied Zoology (IPAZ), University of Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
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El-Elimat T, Raja HA, Figueroa M, Falkinham JO, Oberlies NH. Isochromenones, isobenzofuranone, and tetrahydronaphthalenes produced by Paraphoma radicina, a fungus isolated from a freshwater habitat. PHYTOCHEMISTRY 2014; 104:114-120. [PMID: 24833033 DOI: 10.1016/j.phytochem.2014.04.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 03/31/2014] [Accepted: 04/10/2014] [Indexed: 05/28/2023]
Abstract
Six isochromenones (1-6), clearanols F (5) and G (6), one isobenzofuranone (7), and two tetrahydronaphthalene derivatives (8 and radinaphthalenone (9)), were isolated and identified from a culture of the fungus Paraphoma radicina, which was isolated from submerged wood in a freshwater lake. Compounds 5, 6 and 9 were previously unknown. The structures were elucidated using a set of spectroscopic and spectrometric techniques; the absolute configurations of compounds 5 and 6 were determined by comparison of their experimental ECD measurements with values predicted by TDDFT calculations. Compounds 1-9 were evaluated for antimicrobial activity against an array of bacteria and fungi. The inhibitory activity of compound 4 against Staphylococcus aureus biofilm formation was evaluated.
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Affiliation(s)
- Tamam El-Elimat
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Huzefa A Raja
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States
| | - Mario Figueroa
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico DF 04510, Mexico
| | - Joseph O Falkinham
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
| | - Nicholas H Oberlies
- University of North Carolina at Greensboro, Department of Chemistry and Biochemistry, Greensboro, NC 27402, United States.
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46
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Higginbotham S, Wong WR, Linington RG, Spadafora C, Iturrado L, Arnold AE. Sloth hair as a novel source of fungi with potent anti-parasitic, anti-cancer and anti-bacterial bioactivity. PLoS One 2014; 9:e84549. [PMID: 24454729 PMCID: PMC3893167 DOI: 10.1371/journal.pone.0084549] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 11/15/2013] [Indexed: 01/30/2023] Open
Abstract
The extraordinary biological diversity of tropical forests harbors a rich chemical diversity with enormous potential as a source of novel bioactive compounds. Of particular interest are new environments for microbial discovery. Sloths – arboreal mammals commonly found in the lowland forests of Panama – carry a wide variety of micro- and macro-organisms on their coarse outer hair. Here we report for the first time the isolation of diverse and bioactive strains of fungi from sloth hair, and their taxonomic placement. Eighty-four isolates of fungi were obtained in culture from the surface of hair that was collected from living three-toed sloths (Bradypus variegatus, Bradypodidae) in Soberanía National Park, Republic of Panama. Phylogenetic analyses revealed a diverse group of Ascomycota belonging to 28 distinct operational taxonomic units (OTUs), several of which are divergent from previously known taxa. Seventy-four isolates were cultivated in liquid broth and crude extracts were tested for bioactivity in vitro. We found a broad range of activities against strains of the parasites that cause malaria (Plasmodium falciparum) and Chagas disease (Trypanosoma cruzi), and against the human breast cancer cell line MCF-7. Fifty fungal extracts were tested for antibacterial activity in a new antibiotic profile screen called BioMAP; of these, 20 were active against at least one bacterial strain, and one had an unusual pattern of bioactivity against Gram-negative bacteria that suggests a potentially new mode of action. Together our results reveal the importance of exploring novel environments for bioactive fungi, and demonstrate for the first time the taxonomic composition and bioactivity of fungi from sloth hair.
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Affiliation(s)
- Sarah Higginbotham
- Smithsonian Tropical Research Institute, Panama, Republic of Panama
- * E-mail:
| | - Weng Ruh Wong
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Roger G. Linington
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Carmenza Spadafora
- Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Panama, Republic of Panama
| | - Liliana Iturrado
- Smithsonian Tropical Research Institute, Panama, Republic of Panama
| | - A. Elizabeth Arnold
- School of Plant Sciences, University of Arizona, Tucson, Arizona, United States of America
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47
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Kredics L, Szekeres A, Czifra D, Vágvölgyi C, Leitgeb B. Recent results in alamethicin research. Chem Biodivers 2013; 10:744-71. [PMID: 23681724 DOI: 10.1002/cbdv.201200390] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Indexed: 12/20/2022]
Affiliation(s)
- László Kredics
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged.
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Násztor Z, Horváth J, Leitgeb B. Structural characterization of the short peptaibols trichobrachins by molecular-dynamics methods. Chem Biodivers 2013; 10:876-86. [PMID: 23681731 DOI: 10.1002/cbdv.201200407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Indexed: 11/05/2022]
Abstract
A structural characterization was carried out by molecular-dynamics methods for eight trichobrachin peptides, to identify the conformational features of these short peptaibols. For all peptides, the backbone and side-chain conformations were investigated, different secondary structures, such as type-I and -III β-turns as well as β-bend ribbon spirals, were determined in certain tetrapeptide units of the molecules, and the preferred rotamers of the side chains of amino acids were identified. Furthermore, the end-to-end and residueresidue distances were examined, as well as the fluctuations of backbone atoms were studied. Based on these results, the peptides were compared to one another. Our theoretical study indicated that trichobrachins could be characterized by typical structural properties, and both conformational similarities and dissimilarities were observed between these peptaibols. In summary, this structural investigation supplied a characterization of the various conformational features of eight trichobrachin peptides.
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Affiliation(s)
- Zoltán Násztor
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged
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Röhrich CR, Vilcinskas A, Brückner H, Degenkolb T. The sequences of the eleven-residue peptaibiotics: suzukacillins-B. Chem Biodivers 2013; 10:827-37. [PMID: 23681728 DOI: 10.1002/cbdv.201200384] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Indexed: 11/11/2022]
Abstract
The filamentous fungus designated 'Trichoderma viride' strain 63 C-1 simultaneously produces suzukacillins (SZs), two microheterogeneous groups of peptaibols, under submerged culture conditions. Both groups are readily distinguishable by TLC: the major group is designated SZ-A, whereas the minor group with a higher Rf value is named SZ-B. The peptide mixture was obtained from a MeOH extract of the mycelium. SZ-B was separated from SZ-A by Sephadex LH-20 column chromatography. Although it provided one single spot on silica-gel TLC plates, 15 individual peptides could be separated by C8 reversed-phase (RP) HPLC, and their sequences were determined by HPLC/QqTOF-ESI-HRMS. Fourteen peptides exhibit the C-terminal sequence Pro(6) -Lxx-Lxx-Aib-Pro-Vxxol/Lxxol(11) , which is common for eleven-residue peptaibols. The remaining peptide is tentatively assigned as a ten-residue sequence, in which the C-terminal 1,2-amino alcohol is deleted, thus terminating in free proline. Nine of the peptides carry an Ac-Aib residue at the N-terminus, very frequently found in eleven-residue peptaibols. Four peptides comprise the rare Ac-Ala N-terminus, and for two peptides, N-terminal Ac-D-Iva residues were identified. One peptide contains a C-terminal residue of yet undetermined structure. Comparison with previously reported eleven-residue peptaibol sequences reveals that eight of the peptides represent new sequence analogs.
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Affiliation(s)
- Christian René Röhrich
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Bioresources Project Group, Winchesterstrasse 2, D-35394 Giessen.
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Kimonyo A, Brückner H. Sequences of metanicins, 20-residue peptaibols from the ascomycetous fungus CBS 597.80. Chem Biodivers 2013; 10:813-26. [PMID: 23681727 DOI: 10.1002/cbdv.201300064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Indexed: 11/12/2022]
Abstract
Four linear 20-residue peptaibols, named metanicins (MTCs) A-D, were isolated from submerged cultures of the ascomycetous fungus CBS 597.80. Structure elucidation was performed by a combination of fast-atom-bombardment mass spectrometry (FAB-MS), electrospray ionization MS, Edman degradation of isolated fragments, and amino acid analysis by ion-exchange and gas chromatography, and enantioselective HPLC. The sequences of MTC A(B) are (amino acid exchange in B and C in parentheses): Ac-Aib-Ala-Aib-Ala-Aib-Ala-Gln-Aib-Val-Aib-Gly-Leu-Aib-Pro-Val-Aib-Aib(D-Iva)-Gln-Gln-Pheol and of MTC C(D) Ac-Aib-Ala-Aib-Ala-Aib-Ala-Gln-Aib-Val-Aib-Gly-Leu-Aib-Pro-Val-Aib-Aib(D-Iva)-Gln-Gln-Pheol (Ac, acetyl; Aib, α-aminoisobutyric acid; Iva, isovaline; Pheol, L-phenylalaninol). The peptides are related, and some of the sequences are identical, to other 20-residue peptaibols isolated from Trichoderma species. MTCs show moderate activities against Micrococcus luteus, Enterococcus faecalis, and Staphylococcus aureus, and very low activities against Bacillus subtilis. The producer has originally been identified and deposited as Metarhizium anisopliae var. anisopliae CBS 597.80. Although this identification has been withdrawn by Centralbureau voor Schimmelcultures (CBS) in the meantime, the accession number will be retained - independently from any taxonomic revisions.
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Affiliation(s)
- Anastase Kimonyo
- Interdisciplinary Research Centre for BioSystems, Land Use and Nutrition IFZ, Institute of Nutritional Science, Department of Food Sciences, University of Giessen, Heinrich-Buff-Ring 26 - 32, D-35392 Giessen.
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