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Skrzeszewski M, Maciejewska M, Kobza D, Gawrylak A, Kieda C, Waś H. Risk factors of using late-autophagy inhibitors: Aspects to consider when combined with anticancer therapies. Biochem Pharmacol 2024; 225:116277. [PMID: 38740222 DOI: 10.1016/j.bcp.2024.116277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 04/23/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Cancer resistance to therapy is still an unsolved scientific and clinical problem. In 2022, the hallmarks of cancer have been expanded to include four new features, including cellular senescence. Therapy-induced senescence (TIS) is a stressor-based response to conventional treatment methods, e.g. chemo- and radiotherapy, but also to non-conventional targeted therapies. Since TIS reinforces resistance in cancers, new strategies for sensitizing cancer cells to therapy are being adopted. These include macroautophagy as a potential target for inhibition due to its potential cytoprotective role in many cancers. The mechanism of late-stage autophagy inhibitors is based on blockage of autophagolysosome formation or an increase in lysosomal pH, resulting in disrupted cargo degradation. Such inhibitors are relevant candidates for increasing anticancer therapy effectiveness. In particular, 4-aminoquoline derivatives: chloroquine/hydroxychloroquine (CQ/HCQ) have been tested in multiple clinical trials in combination with senescence-inducing anti-cancer drugs. In this review, we summarize the properties of selected late-autophagy inhibitors and their role in the regulation of autophagy and senescent cell phenotype in vitro and in vivo models of cancer as well as treatment response in clinical trials on oncological patients. Additionally, we point out that, although these compounds increase the effectiveness of treatment in some cases, their practical usage might be hindered due to systemic toxicity, hypoxic environment, dose- ant time-dependent inhibitory effects, as well as a possible contribution to escaping from TIS.
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Affiliation(s)
- Maciej Skrzeszewski
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland; Doctoral School of Translational Medicine, Centre of Postgraduate Medical Education, Poland
| | - Monika Maciejewska
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland
| | - Dagmara Kobza
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland; School of Chemistry, University of Leeds, Leeds, UK
| | - Aleksandra Gawrylak
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland; Department of Immunology, Institute of Functional Biology and Ecology, Faculty of Biology, University of Warsaw, Poland
| | - Claudine Kieda
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland; Centre for Molecular Biophysics, UPR CNRS 4301, Orléans, France; Department of Molecular and Translational Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Halina Waś
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine - National Research Institute, Poland.
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Ding W, Li Y, Li X, Shi S, Yin J, Tian X, Xiao M, Zhang S, Yin H. Genome-guided discovery of two undescribed 6,6-spiroketal polyketides and stereochemical correction of bafilomycins P and Q from the marine-derived Streptomyces sp. SCSIO 66814. PHYTOCHEMISTRY 2024; 222:114101. [PMID: 38636687 DOI: 10.1016/j.phytochem.2024.114101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/25/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
Bafilomycins are macrocyclic polyketides with intriguing structures and therapeutic value. Genomic analysis of Streptomyces sp. SCSIO 66814 revealed a type I polyketide synthase biosynthetic gene cluster (BGC), namely blm, which encoded bafilomycins and featured rich post-modification genes. The One strain many compounds (OSMAC) strategy led to the discovery of six compounds related to the blm BGC from the strain, including two previously undescribed 6,6-spiroketal polyketides, streptospirodienoic acids D (1) and E (2), and four known bafilomycins, bafilomycins P (3), Q (4), D (5), and G (6). The structures of 1 and 2 were determined by extensive spectroscopic analysis, quantum calculation, and biosynthetic analysis. Additionally, the absolute configurations of the 6/5/5 tricyclic ring moiety containing six consecutive chiral carbons in the putative structures of 3 and 4 were corrected through NOE analysis, DP4+ calculation, and single-crystal X-ray diffraction data. Bioinformatic analysis uncovered a plausible biosynthetic pathway for compounds 1-6, indicating that both streptospirodienoic acids and bafilomycins were derived from the same blm BGC. Additionally, sequence analysis revealed that the KR domains of module 2 from blm BGC was B1-type, further supporting the configurations of 1-4. Notably, compounds 3 and 4 displayed significant cytotoxic activities against A-549 human non-small cell lung cancer cells and HCT-116 human colon cancer cells.
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Affiliation(s)
- Wenping Ding
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Yanqun Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Xingyu Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Songbiao Shi
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Jiajia Yin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Xinpeng Tian
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Min Xiao
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Si Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China
| | - Hao Yin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
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Jobst M, Hossain M, Kiss E, Bergen J, Marko D, Del Favero G. Autophagy modulation changes mechano-chemical sensitivity of T24 bladder cancer cells. Biomed Pharmacother 2024; 170:115942. [PMID: 38042111 DOI: 10.1016/j.biopha.2023.115942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/27/2023] [Accepted: 11/21/2023] [Indexed: 12/04/2023] Open
Abstract
Bladder cancer cells possess unique adaptive capabilities: shaped by their environment, cells face a complex chemical mixture of metabolites and xenobiotics accompanied by physiological mechanical cues. These responses might translate into resistance to chemotherapeutical regimens and can largely rely on autophagy. Considering molecules capable of rewiring tumor plasticity, compounds of natural origin promise to offer valuable options. Fungal derived metabolites, such as bafilomycin and wortmannin are widely acknowledged as autophagy inhibitors. Here, their potential to tune bladder cancer cells´ adaptability to chemical and physical stimuli was assessed. Additionally, dietary occurring mycotoxins were also investigated, namely deoxynivalenol (DON, 0.1-10 µM) and fusaric acid (FA, 0.1-1 mM). Endowing a Janus' face behavior, DON and FA are on the one side described as toxins with detrimental health effects. Concomitantly, they are also explored experimentally for selective pharmacological applications including anticancer activities. In non-cytotoxic concentrations, bafilomycin (BAFI, 1-10 nM) and wortmannin (WORT, 1 µM) modified cell morphology and reduced cancer cell migration. Application of shear stress and inhibition of mechano-gated PIEZO channels reduced cellular sensitivity to BAFI treatment (1 nM). Similarly, for FA (0.5 mM) PIEZO1 expression and inhibition largely aligned with the modulatory potential on cancer cells motility. Additionally, this study highlighted that the activity profile of compounds with similar cytotoxic potential (e.g. co-incubation DON with BAFI or FA with WORT) can diverge substantially in the regulation of cell mechanotransduction. Considering the interdependence between tumor progression and response to mechanical cues, these data promise to provide a novel viewpoint for the study of chemoresistance and associated pathways.
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Affiliation(s)
- Maximilian Jobst
- Department of Food Chemistry and Toxicology, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria; Core Facility Multimodal Imaging, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, 1090 Vienna, Austria
| | - Maliha Hossain
- Department of Food Chemistry and Toxicology, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria
| | - Endre Kiss
- Core Facility Multimodal Imaging, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria
| | - Janice Bergen
- Department of Food Chemistry and Toxicology, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria; Core Facility Multimodal Imaging, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, 1090 Vienna, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria; Core Facility Multimodal Imaging, University of Vienna Faculty of Chemistry, Währinger Str. 38-40, 1090 Vienna, Austria.
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Rani A, Saini KC, Bast F, Varjani S, Mehariya S, Bhatia SK, Sharma N, Funk C. A Review on Microbial Products and Their Perspective Application as Antimicrobial Agents. Biomolecules 2021; 11:biom11121860. [PMID: 34944505 PMCID: PMC8699383 DOI: 10.3390/biom11121860] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 02/06/2023] Open
Abstract
Microorganisms including actinomycetes, archaea, bacteria, fungi, yeast, and microalgae are an auspicious source of vital bioactive compounds. In this review, the existing research regarding antimicrobial molecules from microorganisms is summarized. The potential antimicrobial compounds from actinomycetes, particularly Streptomyces spp.; archaea; fungi including endophytic, filamentous, and marine-derived fungi, mushroom; and microalgae are briefly described. Furthermore, this review briefly summarizes bacteriocins, halocins, sulfolobicin, etc., that target multiple-drug resistant pathogens and considers next-generation antibiotics. This review highlights the possibility of using microorganisms as an antimicrobial resource for biotechnological, nutraceutical, and pharmaceutical applications. However, more investigations are required to isolate, separate, purify, and characterize these bioactive compounds and transfer these primary drugs into clinically approved antibiotics.
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Affiliation(s)
- Alka Rani
- Department of Botany, School of Basic and Applied Sciences, Central University of Punjab, Bathinda 151401, India; (A.R.); (K.C.S.)
| | - Khem Chand Saini
- Department of Botany, School of Basic and Applied Sciences, Central University of Punjab, Bathinda 151401, India; (A.R.); (K.C.S.)
| | - Felix Bast
- Department of Botany, School of Basic and Applied Sciences, Central University of Punjab, Bathinda 151401, India; (A.R.); (K.C.S.)
- Correspondence: (F.B.); (S.M.); (S.K.B.)
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar 382010, India;
| | - Sanjeet Mehariya
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden;
- Correspondence: (F.B.); (S.M.); (S.K.B.)
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea
- Correspondence: (F.B.); (S.M.); (S.K.B.)
| | - Neeta Sharma
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Department of Sustainability-CR Trisaia, SS Jonica 106, km 419 + 500, 75026 Rotondella, Italy;
| | - Christiane Funk
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden;
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Armin R, Zühlke S, Mahnkopp-Dirks F, Winkelmann T, Kusari S. Evaluation of Apple Root-Associated Endophytic Streptomyces pulveraceus Strain ES16 by an OSMAC-Assisted Metabolomics Approach. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.643225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The One Strain Many Compounds approach (OSMAC) is a powerful and comprehensive method that enables the chemo-diversity evaluation of microorganisms. This is achieved by variations of physicochemical cultivation parameters and by providing biotic and abiotic triggers to mimic microorganisms' natural environment in the lab. This approach can reactivate the silent biosynthetic routes of specific metabolites typically not biosynthesized under standard laboratory conditions. In the present study, we combined the OSMAC approach with static headspace solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS), high-performance liquid chromatography-high-resolution tandem mass spectrometry (HPLC-HRMSn), and matrix-assisted laser desorption/ionization high-resolution mass spectrometry imaging (MALDI-HRMSI) to evaluate the chemoecological significance of an apple root-associated endophytic Streptomyces pulveraceus strain ES16. We employed the OSMAC approach by cultivating the endophyte in six different media conditions and performed temporal studies over 14 days. Analysis of the volatilome revealed that only under stressful conditions associated with sporulation, endophytic S. pulveraceus ES16 produces geosmin, a volatile semiochemical known to attract the soil arthropods Collembola (springtails) specifically. Subsequently, targeted metabolic profiling revealed polycyclic tetramate macrolactams (PTMs) production by the endophyte under stress, which are bioactive against various pathogens. Additionally, the endophyte produced the iron-chelating siderophore, mirubactin, under the same conditions. The structures of the compounds were evaluated using HRMSn and by comparison with literature data. Finally, MALDI-HRMSI revealed the produced compounds' spatial-temporal distribution over 14 days. The compounds were profusely secreted into the medium after production. Our results indicate that endophytic S. pulveraceus ES16 can release the signal molecule geosmin, chemical defense compounds such as the PTMs, as well as the siderophore mirubactin into the host plant apoplast or the soil for ecologically meaningful purposes, which are discussed.
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Xie X, Lu S, Pan X, Zou M, Li F, Lin H, Hu J, Fan S, He J. Antiviral Bafilomycins from a Feces-Inhabiting Streptomyces sp. JOURNAL OF NATURAL PRODUCTS 2021; 84:537-543. [PMID: 33631936 DOI: 10.1021/acs.jnatprod.0c01243] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new bafilomycin derivative (1) and another seven known bafilomycins (2-8) were isolated from feces-derived Streptomyces sp. HTL16. The structure of 1 was elucidated by 1D and 2D NMR spectroscopic analysis. Biological testing demonstrated that these bafilomycins exhibited potent antiviral activities against the influenza A and SARS-CoV-2 viruses, with IC50 values in the nanomolar range, by inhibiting the activity of endosomal ATP-driven proton pumps.
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Affiliation(s)
- Xi Xie
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Shengsheng Lu
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Xiaoyan Pan
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Min Zou
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Fangfang Li
- Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, China National Analytical Center, Guangzhou 510070, People's Republic of China
| | - Haixing Lin
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Jianan Hu
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Sheng Fan
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Jian He
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
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Sun X, Wang G, Xiao H, Jiang J, Xiao D, Xing B, Li A, Zhang Y, Sun K, Xu Y, Guo L, Yang D, Ma M. Strepimidazoles A-G from the Plant Endophytic Streptomyces sp. PKU-EA00015 with Inhibitory Activities against a Plant Pathogenic Fungus. JOURNAL OF NATURAL PRODUCTS 2020; 83:2246-2254. [PMID: 32663025 DOI: 10.1021/acs.jnatprod.0c00362] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Seven new 4-acyl-2-aminoimidazoles, designated strepimidazoles A-G (1-7), were discovered from the endophytic Streptomyces sp. PKU-EA00015 isolated from Salvia miltiorrhiza Bunge, whose dry root "Danshen" is one of the most widely used traditional Chinese medicines. The resonance signals of the 2-aminoimidazole moiety in 1-7 were absent in the NMR spectra due to tautomerization, and the structures of 1-7 were identified after preparation of their acetylation products 1a-7a, respectively. Compounds 1-7 represent a new family of 2-aminoimidazole-containing natural products, enriching the structural diversity of natural products from endophytic origin. Compounds 1-7 showed different degrees of inhibitory activities against the plant pathogenic fungus Verticillium dahliae V991, revealing structure-activity relationships on the acyl moieties. The plant pathogenic fungus V. dahliae has been confirmed to cause serious chlorosis of cultivated S. miltiorrhiza Bunge in China. This study opens the door for further investigation of mutualistic relationships between S. miltiorrhiza Bunge and their endophytic actinomycetes and for possible antifungal agent development for biological control of V. dahliae in the future.
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Affiliation(s)
- Xiaoxu Sun
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Guiyang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Hua Xiao
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Jingyi Jiang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Dongliang Xiao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China
| | - Baiying Xing
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Annan Li
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Yingtao Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Kai Sun
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yuquan Xu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China
| | - Lanping Guo
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Donghui Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Ming Ma
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
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Steele AD, Teijaro CN, Yang D, Shen B. Leveraging a large microbial strain collection for natural product discovery. J Biol Chem 2019; 294:16567-16576. [PMID: 31570525 DOI: 10.1074/jbc.rev119.006514] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Throughout history, natural products have significantly contributed to the discovery of novel chemistry, drug leads, and tool molecules to probe and address complex challenges in biology and medicine. Recent microbial genome sequencing efforts have uncovered many microbial biosynthetic gene clusters without an associated natural product. This means that the natural products isolated to date do not fully reflect the biosynthetic potential of microbial strains. This observation has rejuvenated the natural product community and inspired a return to microbial strain collections. Mining large microbial strain collections with the most current technologies in genome sequencing, bioinformatics, and high-throughput screening techniques presents new opportunities in natural product discovery. In this review, we report on the newly expanded microbial strain collection at The Scripps Research Institute, which represents one of the largest and most diverse strain collections in the world. Two complementary approaches, i.e. structure-centric and function-centric, are presented here to showcase how to leverage a large microbial strain collection for natural product discovery and to address challenges and harness opportunities for future efforts. Highlighted examples include the discovery of alternative producers of known natural products with superior growth characteristics and high titers, novel analogs of privileged scaffolds, novel natural products, and new activities of known and new natural products. We anticipate that this large microbial strain collection will facilitate the discovery of new natural products for many applications.
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Affiliation(s)
- Andrew D Steele
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458
| | | | - Dong Yang
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458.,Natural Products Library Initiative, The Scripps Research Institute, Jupiter, Florida 33458
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458 .,Natural Products Library Initiative, The Scripps Research Institute, Jupiter, Florida 33458.,Department of Molecular Medicine, The Scripps Research Institute, Jupiter, Florida 33458
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Shaaban KA, Shaaban M, Meiners M, Schüffler A, Kelter G, Fiebig HH, Laatsch H. Boshramycinones A-C: New anthracyclinones produced by a marine-derived Streptomyces sp.: isolation, structure elucidation and biological activities. Nat Prod Res 2019; 35:1281-1291. [PMID: 31429299 DOI: 10.1080/14786419.2019.1645658] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Boshramycinones A-C (1-3), three new anthracyclinones, were isolated from the culture broth of the marine-derived Streptomyces sp. Mei 16-1,2 together with 2-acetyl-1,8-dihydroxy-3-methyl-anthraquinone (4) and bafilomycins B1, B2, and C1-amide. The isolated compounds were identified by NMR spectroscopy and mass spectrometry, the absolute configuration of 3 was determined by comparison of experimental and ab initio-calculated chiroptical data. The antimicrobial activity of the bacterial extract and the isolated compounds were assayed using a set of microorganisms, and cytotoxic activities were determined against 36 human cancer cell lines.
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Affiliation(s)
- Khaled A Shaaban
- University of Göttingen, Institute of Organic and Biomolecular Chemistry, Göttingen, Germany
| | - Mohamed Shaaban
- University of Göttingen, Institute of Organic and Biomolecular Chemistry, Göttingen, Germany.,Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Cairo, Egypt
| | | | - Anja Schüffler
- Institute for Biotechnology and Drug Research (IBWF), Kaiserslautern, Germany
| | | | | | - Hartmut Laatsch
- University of Göttingen, Institute of Organic and Biomolecular Chemistry, Göttingen, Germany
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Characterisation of Two Polyketides from Streptomyces sp. SKH1-2 Isolated from Roots of Musa (ABB) cv. 'Kluai Sao Kratuep Ho'. Int Microbiol 2019; 22:451-459. [PMID: 30941598 DOI: 10.1007/s10123-019-00071-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/07/2019] [Accepted: 03/05/2019] [Indexed: 10/27/2022]
Abstract
An endophytic actinomycete strain SKH1-2 isolated from Musa (ABB) cv. 'Kluai Sao Kratuep Ho' collected in Suphan Buri province (14° 54' 22.5″ N/100° 04' 50″ E), Thailand, was identified as Streptomyces pseudovenezuelae based on phenotypic and chemotaxonomic characteristics, and 16S rRNA sequence analyses. A chemical investigation led to the isolation of two polyketide molecules from the n-butanol crude extract of the strain SKH1-2 culture broth. The compounds were purified using various chromatographic techniques and identified using spectroscopic methods compared with earlier published data. Compound 1, chartreusin, is known as an anti-Gram (+) bacterial compound and was active against Bacillus subtilis ATCC 6633, Kocuria rhizophila ATCC 9341 and Staphylococcus aureus ATCC 6538p with MIC values of 3.1, 1.6 and 12.5 μg/mL, respectively. Compound 2, lumichrome, did not show activity against all tested microbes. To our knowledge, this is the first report of chartreusin and lumichrome isolated from S. pseudovenezuelae. Taken together, it could be proved that Thai plant species are valuable reservoirs of interesting endophytic actinomycetes producing several interesting biologically active compounds.
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Secondary Metabolites of Endophytic Actinomycetes: Isolation, Synthesis, Biosynthesis, and Biological Activities. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 108 2019; 108:207-296. [DOI: 10.1007/978-3-030-01099-7_3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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12
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Zhang X, Chen L, Chai W, Lian XY, Zhang Z. A unique indolizinium alkaloid streptopertusacin A and bioactive bafilomycins from marine-derived Streptomyces sp. HZP-2216E. PHYTOCHEMISTRY 2017; 144:119-126. [PMID: 28923323 DOI: 10.1016/j.phytochem.2017.09.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/09/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Streptopertusacin A, a unique indolizinium alkaloid existing as a zwitterion, and six bafilomycins including two previously undescribed ones of 21,22-en-bafilomycin D and 21,22-en-9-hydroxybafilomycin D were isolated from a culture of the seaweed-derived Streptomyces sp. HZP-2216E. Structures of these isolated compounds were determined based on extensive NMR spectroscopic analyses, HRESIMS and MS-MS data. The stereochemical assignments were achieved by NOE information, chemical degradation, Marfey's method, and electronic circular dichroism (ECD) calculation. Streptopertusacin A is the first example of this type of indolizinium alkaloid from microorganisms and showed moderate activity against the growth of methicillin-resistant Staphylococcus aureus (MRSA). 21,22-en-bafilomycin D and 21,22-en-9-hydroxybafilomycin D had potent activities in inhibiting the proliferation of glioma cells and the growth of MRSA.
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Affiliation(s)
- Xiufang Zhang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China
| | - Lu Chen
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China
| | - Weiyun Chai
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China
| | - Xiao-Yuan Lian
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Zhizhen Zhang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China.
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13
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Taechowisan T, Chaisaeng S, Phutdhawong WS. Antibacterial, antioxidant and anticancer activities of biphenyls from Streptomyces sp. BO-07: an endophyte in Boesenbergia rotunda (L.) Mansf A. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1339669] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Thongchai Taechowisan
- Department of Microbiology, Faculty of Science, Silpakorn University, Nakorn Pathom, Thailand
| | - Suchanya Chaisaeng
- Department of Microbiology, Faculty of Science, Silpakorn University, Nakorn Pathom, Thailand
| | - Waya S. Phutdhawong
- Department of Chemistry, Faculty of Science, Silpakorn University, Nakorn Pathom, Thailand
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14
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Endophytic Nocardiopsis sp. from Zingiber officinale with both antiphytopathogenic mechanisms and antibiofilm activity against clinical isolates. 3 Biotech 2017; 7:115. [PMID: 28567627 DOI: 10.1007/s13205-017-0735-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 04/19/2017] [Indexed: 10/19/2022] Open
Abstract
Novel and potential antimicrobial compounds are essential to tackle the frequently emerging multidrug-resistant pathogens and also to develop environment friendly agricultural practices. In the current study, endophytic actinomycetes from rhizome of Zingiber officinale were explored in terms of its diversity and bioactive properties. Fourteen different organisms were isolated, identified and screened for activity against Pythium myriotylum and human clinical pathogens. Among these, Nocardiopsis sp. ZoA1 was found to have highest inhibition with excellent antibacterial effects compared to standard antibiotics. Remarkable antibiofilm property was also shown by the extract of ZoA1. Its antifungal activity against Pythium and other common phytopathogens was also found to be promising as confirmed by scanning electron microscopic analysis. By PCR-based sequence analysis of phz E gene, the organism was confirmed for the genetic basis of phenazine biosynthesis. Further GC-MS analysis of Nocardiopsis sp. revealed the presence of various compounds including Phenol, 2,4-bis (1,1-dimethylethyl) and trans cinnamic acid which can have significant role in the observed result. The current study is the first report on endophytic Nocardiopsis sp. from ginger with promising applications. In vivo treatment of Nocardiopsis sp. on ginger rhizome has revealed its inhibition towards the colonization of P. myriotylum which makes the study to have promises to manage the severe diseases in ginger like rhizome rot.
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15
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16
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Abdel-Kader MS, Muharram MM. New microbial source of the antifungal allylamine "Terbinafine". Saudi Pharm J 2017; 25:440-442. [PMID: 28344499 PMCID: PMC5357105 DOI: 10.1016/j.jsps.2016.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 06/19/2016] [Indexed: 11/21/2022] Open
Abstract
The isolated active compound “F12” from the culture media of the Streptomyces sp. KH-F12 was identified using different spectroscopic techniques. Both 1D- and 2D-NMR as well as HRESIMS were utilized to characterize the structure of the isolated compound. ‘F12” was found to be the known systemic antifungal drug terbinafine marketed under the name “Lamisil”. Full analysis of the COSY, HSQC and HMBC enables the full assignment of proton and carbon atoms. Terbinafine is a synthetic allylamine and is reported here for the first time from natural source.
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Affiliation(s)
- Maged S Abdel-Kader
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Alkharj, Saudi Arabia; Department of Pharmacognosy, College of Pharmacy, Alexandria University, Alexandria 21215, Egypt
| | - Magdy M Muharram
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Alkharj, Saudi Arabia; Department of Microbiology, College of Science, Al-Azhar University, Nasr City, 11884 Cairo, Egypt
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17
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Li Z, Du L, Zhang W, Zhang X, Jiang Y, Liu K, Men P, Xu H, Fortman JL, Sherman DH, Yu B, Gao S, Li S. Complete elucidation of the late steps of bafilomycin biosynthesis in Streptomyces lohii. J Biol Chem 2017; 292:7095-7104. [PMID: 28292933 DOI: 10.1074/jbc.m116.751255] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 02/27/2017] [Indexed: 11/06/2022] Open
Abstract
Bafilomycins are an important subgroup of polyketides with diverse biological activities and possible applications as specific inhibitors of vacuolar H+-ATPase. However, the general toxicity and structural complexity of bafilomycins present formidable challenges to drug design via chemical modification, prompting interests in improving bafilomycin activities via biosynthetic approaches. Two bafilomycin biosynthetic gene clusters have been identified, but their post-polyketide synthase (PKS) tailoring steps for structural diversification and bioactivity improvement remain largely unknown. In this study, the post-PKS tailoring pathway from bafilomycin A1 (1)→C1 (2)→B1 (3) in the marine microorganism Streptomyces lohii was elucidated for the first time by in vivo gene inactivation and in vitro biochemical characterization. We found that fumarate is first adenylated by a novel fumarate adenylyltransferase Orf3. Then, the fumaryl transferase Orf2 is responsible for transferring the fumarate moiety from fumaryl-AMP to the 21-hydroxyl group of 1 to generate 2. Last, the ATP-dependent amide synthetase BafY catalyzes the condensation of 2 and 2-amino-3-hydroxycyclopent-2-enone (C5N) produced by the 5-aminolevulinic acid synthase BafZ and the acyl-CoA ligase BafX, giving rise to the final product 3. The elucidation of fumarate incorporation mechanism represents the first paradigm for biosynthesis of natural products containing the fumarate moiety. Moreover, the bafilomycin post-PKS tailoring pathway features an interesting cross-talk between primary and secondary metabolisms for natural product biosynthesis. Taken together, this work provides significant insights into bafilomycin biosynthesis to inform future pharmacological development of these compounds.
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Affiliation(s)
- Zhong Li
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101.,the University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Du
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101.,the University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Zhang
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101
| | - Xingwang Zhang
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101
| | - Yuanyuan Jiang
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101.,the University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Liu
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101
| | - Ping Men
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101
| | - Huifang Xu
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101
| | - Jeffrey L Fortman
- the Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, and
| | - David H Sherman
- the Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, and
| | - Bing Yu
- the State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, China
| | - Song Gao
- the State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, China
| | - Shengying Li
- From the Shandong Provincial Key Laboratory of Synthetic Biology, and CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101,
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18
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Supong K, Thawai C, Choowong W, Kittiwongwattana C, Thanaboripat D, Laosinwattana C, Koohakan P, Parinthawong N, Pittayakhajonwut P. Antimicrobial compounds from endophytic Streptomyces sp. BCC72023 isolated from rice ( Oryza sativa L.). Res Microbiol 2016; 167:290-298. [DOI: 10.1016/j.resmic.2016.01.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/12/2016] [Accepted: 01/14/2016] [Indexed: 02/03/2023]
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19
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Wu C, Medema MH, Läkamp RM, Zhang L, Dorrestein PC, Choi YH, van Wezel GP. Leucanicidin and Endophenasides Result from Methyl-Rhamnosylation by the Same Tailoring Enzymes in Kitasatospora sp. MBT66. ACS Chem Biol 2016; 11:478-90. [PMID: 26675041 DOI: 10.1021/acschembio.5b00801] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The increasing bacterial multidrug resistance necessitates novel drug-discovery efforts. One way to obtain novel chemistry is glycosylation, which is prevalent in nature, with high diversity in both the sugar moieties and the targeted aglycones. Kitasatospora sp. MBT66 produces endophenaside antibiotics, which is a family of (methyl-)rhamnosylated phenazines. Here we show that this strain also produces the plecomacrolide leucanicidin (1), which is derived from bafilomycin A1 by glycosylation with the same methyl-rhamnosyl moiety as present in the endophenasides. Immediately adjacent to the baf genes for bafilomycin biosynthesis lie leuA and leuB, which encode a sugar-O-methyltransferase and a glycosyltransferase, respectively. LeuA and LeuB are the only enzymes encoded by the genome of Kitasatospora sp. MBT66 that are candidates for the methyl-rhamnosylation of natural products, and mutation of leuB abolished glycosylation of both families of natural products. Thus, LeuA and -B mediate the post-PKS methyl-rhamnosylation of bafilomycin A1 to leucanicidin and of phenazines to endophenasides, showing surprising promiscuity by tolerating both macrolide and phenazine skeletons as the substrates. Detailed metabolic analysis by MS/MS based molecular networking facilitated the characterization of nine novel phenazine glycosides 6-8, 16, and 22-26, whereby compounds 23 and 24 represent an unprecedented tautomeric glyceride phenazine, further enriching the structural diversity of endophenasides.
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Affiliation(s)
- Changsheng Wu
- Molecular
Biotechnology, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
- Natural
Products Laboratory, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
| | - Marnix H. Medema
- Bioinformatics
Group, Wageningen University, Droevendaalsesteeg 1, 6708PB, Wageningen, The Netherlands
| | - Rianne M. Läkamp
- Molecular
Biotechnology, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0751, United States
| | - Le Zhang
- Molecular
Biotechnology, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
| | - Pieter C. Dorrestein
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0751, United States
| | - Young Hae Choi
- Natural
Products Laboratory, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
| | - Gilles P. van Wezel
- Molecular
Biotechnology, Institute of Biology, Leiden University, Sylviusweg
72, 2333 BE Leiden, The Netherlands
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20
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Epigenetic Activation of Antibacterial Property of an Endophytic Streptomyces coelicolor Strain AZRA 37 and Identification of the Induced Protein Using MALDI TOF MS/MS. PLoS One 2016; 11:e0147876. [PMID: 26844762 PMCID: PMC4742224 DOI: 10.1371/journal.pone.0147876] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/08/2016] [Indexed: 12/27/2022] Open
Abstract
The endophytic Streptomyces coelicolor strain AZRA 37 was isolated from the surface sterilized root of Azadirachta indica A. Juss., commonly known as neem plant in India. Since only a few reports are available regarding epigenetic modulations of microbial entities, S. coelicolor was treated with different concentrations of 5-azacytidine for this purpose and evaluated for its antibacterial potential against five human pathogenic bacteria (Aeromonas hydrophila IMS/GN11, Enterococcus faecalis IMS/GN7, Salmonella typhi MTCC 3216, Shigella flexneri ATCC 12022 and Staphylococcus aureus ATCC 25923). The crude extract obtained from cultures treated with 25 μM concentration of 5-azacytidine, was found effective against all five pathogenic bacteria tested while the untreated control was only active against 3 pathogenic bacteria. HPLC analysis of crude compounds from treated cultures showed a greater number of compounds than that of the control. Extraction of whole cell protein and its SDS PAGE analysis showed an additional major protein band in 25 μM 5-azacytidine treated culture and MALDI TOF MS/MS analysis revealed that this protein belongs to the porin family.
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21
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Masand M, Jose PA, Menghani E, Jebakumar SRD. Continuing hunt for endophytic actinomycetes as a source of novel biologically active metabolites. World J Microbiol Biotechnol 2015; 31:1863-75. [PMID: 26410426 DOI: 10.1007/s11274-015-1950-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 09/15/2015] [Indexed: 10/23/2022]
Abstract
Drug-resistant pathogens and persistent agrochemicals mount the detrimental threats against human health and welfare. Exploitation of beneficial microorganisms and their metabolic inventions is most promising way to tackle these two problems. Since the successive discoveries of penicillin and streptomycin in 1940s, numerous biologically active metabolites have been discovered from different microorganisms, especially actinomycetes. In recent years, actinomycetes that inhabit unexplored environments have received significant attention due to their broad diversity and distinctive metabolic potential with medical, agricultural and industrial importance. In this scenario, endophytic actinomycetes that inhabit living tissues of plants are emerging as a potential source of novel bioactive compounds for the discovery of drug leads. Also, endophytic actinomycetes are considered as bio-inoculants to improve crop performance through organic farming practices. Further efforts on exploring the endophytic actinomycetes associated with the plants warrant the likelihood of discovering new taxa and their metabolites with novel chemical structures and biotechnological importance. This mini-review highlights the recent achievements in isolation of endophytic actinomycetes and an assortment of bioactive compounds.
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Affiliation(s)
- Meeta Masand
- School of Life sciences, Suresh Gyan Vihar University, Jaipur, India
| | - Polpass Arul Jose
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India. .,Department of Agricultural Microbiology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai, India.
| | - Ekta Menghani
- Department of Biotechnology, School of Science, JECRC University, Jaipur, India
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22
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Isolation and Structural Determination of Makinolide B fromStreptomycessp. MK-19. Biosci Biotechnol Biochem 2014; 77:1964-6. [DOI: 10.1271/bbb.130204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Xie P, Ma M, Rateb ME, Shaaban K, Yu Z, Huang SX, Zhao LX, Zhu X, Yan Y, Peterson R, Lohman JR, Yang D, Yin M, Rudolf JD, Jiang Y, Duan Y, Shen B. Biosynthetic potential-based strain prioritization for natural product discovery: a showcase for diterpenoid-producing actinomycetes. JOURNAL OF NATURAL PRODUCTS 2014; 77:377-87. [PMID: 24484381 PMCID: PMC3963700 DOI: 10.1021/np401063s] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Indexed: 05/09/2023]
Abstract
Natural products remain the best sources of drugs and drug leads and serve as outstanding small-molecule probes to dissect fundamental biological processes. A great challenge for the natural product community is to discover novel natural products efficiently and cost effectively. Here we report the development of a practical method to survey biosynthetic potential in microorganisms, thereby identifying the most promising strains and prioritizing them for natural product discovery. Central to our approach is the innovative preparation, by a two-tiered PCR method, of a pool of pathway-specific probes, thereby allowing the survey of all variants of the biosynthetic machineries for the targeted class of natural products. The utility of the method was demonstrated by surveying 100 strains, randomly selected from our actinomycete collection, for their biosynthetic potential of four classes of natural products, aromatic polyketides, reduced polyketides, nonribosomal peptides, and diterpenoids, identifying 16 talented strains. One of the talented strains, Streptomyces griseus CB00830, was finally chosen to showcase the discovery of the targeted classes of natural products, resulting in the isolation of three diterpenoids, six nonribosomal peptides and related metabolites, and three polyketides. Variations of this method should be applicable to the discovery of other classes of natural products.
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Affiliation(s)
- Pengfei Xie
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Ming Ma
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Mostafa E. Rateb
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Khaled
A. Shaaban
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Zhiguo Yu
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Sheng-Xiong Huang
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Li-Xing Zhao
- Yunnan
Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People’s Republic
of China
| | - Xiangcheng Zhu
- Hunan
Engineering Research Center of Combinatorial Biosynthesis and Natural
Product Drug Discovery, Changsha, Hunan 410329, People’s Republic of China
- Xiangya
International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, People’s Republic of China
| | - Yijun Yan
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Ryan
M. Peterson
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
- Division
of Pharmaceutical Sciences, University of
Wisconsin−Madison, Madison, Wisconsin 53705, United States
| | - Jeremy R. Lohman
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Dong Yang
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Min Yin
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Jeffrey D. Rudolf
- Department
of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Yi Jiang
- Yunnan
Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People’s Republic
of China
| | - Yanwen Duan
- Hunan
Engineering Research Center of Combinatorial Biosynthesis and Natural
Product Drug Discovery, Changsha, Hunan 410329, People’s Republic of China
- Xiangya
International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, People’s Republic of China
| | - Ben Shen
- Hunan
Engineering Research Center of Combinatorial Biosynthesis and Natural
Product Drug Discovery, Changsha, Hunan 410329, People’s Republic of China
- Division
of Pharmaceutical Sciences, University of
Wisconsin−Madison, Madison, Wisconsin 53705, United States
- Department
of Molecular Therapeutics, The Scripps Research
Institute, Jupiter, Florida 33458, United
States
- Natural Products
Library Initiative, The Scripps Research
Institute, Jupiter, Florida 33458, United
States
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24
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Isolation and characterization of phytotoxic compounds produced by Streptomyces sp. AMC 23 from red mangrove (Rhizophora mangle). Appl Biochem Biotechnol 2013; 171:1602-16. [PMID: 23979946 DOI: 10.1007/s12010-013-0418-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 07/29/2013] [Indexed: 10/26/2022]
Abstract
Natural products produced by microorganisms have been utilized as sources of new drugs possessing a wide range of agrochemical and pharmacological activities. During our research on Actinomycetes from Brazilian mangroves, the ethyl acetate extract of Streptomyces sp. AMC 23 isolated from the red mangrove (Rhizophora mangle) rhizosphere produced a highly active compound against the microalga Chlorella vulgaris, often used to assess the phytotoxic activity. As a result, the bioassay-guided fractionation led to the isolation of the mixture of the known compounds bafilomycin B1 and bafilomycin B2. The chemical structures of bafilomycin B1 and bafilomycin B2 were established based on their spectroscopic data by infrared (IR), mass spectrometry (MS), (1)H nuclear magnetic resonance (NMR), gradient-enhanced heteronuclear multiple quantum coherence (gHMQC), and gradient-enhanced heteronuclear multiple-bond connectivity (gHMBC) as well as comparison with reference data from the literature. Moreover, it was also possible to identify other bafilomycins using non-chromatographic-dependent techniques (Tandem mass spectrometry). Additionally, this is the first report on the phytotoxic activity of bafilomycin B1.
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25
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Tebbets B, Yu Z, Stewart D, Zhao LX, Jiang Y, Xu LH, Andes D, Shen B, Klein B. Identification of antifungal natural products via Saccharomyces cerevisiae bioassay: insights into macrotetrolide drug spectrum, potency and mode of action. Med Mycol 2013; 51:280-9. [PMID: 22928922 PMCID: PMC3594352 DOI: 10.3109/13693786.2012.710917] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Since current antifungal drugs have not kept pace with the escalating medical demands of fungal infections, new, effective medications are required. However, antifungal drug discovery is hindered by the evolutionary similarity of mammalian and fungal cells, which results in fungal drug targets having human homologs and drug non-selectivity. The group III hybrid histidine kinases (HHKs) are an attractive drug target since they are conserved in fungi and absent in mammals. We used a Saccharomyces cerevisiae reporter strain that conditionally expresses HHK to establish a high-throughput bioassay to screen microbial extracts natural products for antifungals. We identified macrotetrolides, a group of related ionophores thought to exhibit restricted antifungal activity. In addition to confirming the use of this bioassay for the discovery of antifungal natural products, we demonstrated broader, more potent fungistatic activity of the macrotetrolides against multiple Candida spp., Cryptococcus spp., and Candida albicans in biofilms. Macrotetrolides were also active in an animal model of C. albicans biofilm, but were found to have inconsistent activity against fluconazole-resistant C. albicans, with most isolates resistant to this natural product. The macrotetrolides do not directly target HHKs, but their selective activity against S. cerevisiae grown in galactose (regardless of Drk1 expression) revealed potential new insight into the role of ion transport in the mode of action of these promising antifungal compounds. Thus, this simple, high-throughput bioassay permitted us to screen microbial extracts, identify natural products as antifungal drugs, and expand our understanding of the activity of macrotetrolides.
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Affiliation(s)
- Brad Tebbets
- Department of Pediatrics, the University of Wisconsin School of Medicine and Public Health, Madison, WI
- Department of Medical Microbiology and Immunology, the University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Zhiguo Yu
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida, USA
| | - Douglas Stewart
- Department of Pediatrics, the University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Li-Xing Zhao
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, China
| | - Yi Jiang
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, China
| | - Li-Hua Xu
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, China
| | - David Andes
- Department of Internal Medicine, the University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida, USA
- Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, Florida, USA
| | - Bruce Klein
- Department of Pediatrics, the University of Wisconsin School of Medicine and Public Health, Madison, WI
- Department of Internal Medicine, the University of Wisconsin School of Medicine and Public Health, Madison, WI
- Department of Medical Microbiology and Immunology, the University of Wisconsin School of Medicine and Public Health, Madison, WI
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Zhang W, Fortman JL, Carlson JC, Yan J, Liu Y, Bai F, Guan W, Jia J, Matainaho T, Sherman DH, Li S. Characterization of the bafilomycin biosynthetic gene cluster from Streptomyces lohii. Chembiochem 2013; 14:301-6. [PMID: 23362147 PMCID: PMC3771327 DOI: 10.1002/cbic.201200743] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Indexed: 11/08/2022]
Abstract
New hope for old bones: The plecomacrolide bafilomycin has been explored for decades as an anti-osteoporotic. However, its structural complexity has limited the synthesis of analogues. The cloning of the bafilomycin biosynthetic gene cluster from the environmental isolate Streptomyces lohii opens the door to the production of new analogues through bioengineering.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
| | - J. L. Fortman
- Life Sciences Institute, Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA), Fax: (+1)-734-615-3641
| | - Jacob C. Carlson
- Life Sciences Institute, Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA), Fax: (+1)-734-615-3641
| | - Jiyong Yan
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
| | - Yi Liu
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
| | - Fali Bai
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
| | - Wenna Guan
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
| | - Junyong Jia
- Life Sciences Institute, Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA), Fax: (+1)-734-615-3641
| | - Teatulohi Matainaho
- Professor Teatulohi Matainaho, Department of Pharmacology, University of Papua New Guinea, Port Morseby (Papua New Guinea)
| | - David H. Sherman
- Life Sciences Institute, Departments of Medicinal Chemistry, Chemistry, and Microbiology and Immunology University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA), Fax: (+1)-734-615-3641
| | - Shengying Li
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101 (P. R. China), Fax: (+86)-532-8066-2778
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Abstract
AbstractSecondary metabolites obtained from Actinomycetales provide a potential source of many novel compounds with antibacterial, antitumour, antifungal, antiviral, antiparasitic and other properties. The majority of these compounds are widely used as medicines for combating multidrug-resistant Gram-positive and Gram-negative bacterial strains. Members of the genus Streptomyces are profile producers of previously-known secondary metabolites. Actinomycetes have been isolated from terrestrial soils, from the rhizospheres of plant roots, and recently from marine sediments. This review demonstrates the diversity of secondary metabolites produced by actinomycete strains with respect to their chemical structure, biological activity and origin. On the basis of this diversity, this review concludes that the discovery of new bioactive compounds will continue to pose a great challenge for scientists.
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Kodani S, Murao A, Hidaki M, Sato K, Ogawa N. Isolation and structural determination of a new macrolide, makinolide, from the newly isolated Streptomyces sp. MK-30. J Antibiot (Tokyo) 2012; 65:331-4. [DOI: 10.1038/ja.2012.24] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Wang YF, Wei SJ, Zhang ZP, Zhan TH, Tu GQ. Antifungalmycin, an antifungal macrolide from Streptomyces padanus 702. NATURAL PRODUCTS AND BIOPROSPECTING 2012; 2:41-45. [PMCID: PMC4131570 DOI: 10.1007/s13659-011-0037-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 02/20/2012] [Indexed: 04/05/2024]
Abstract
Two polyene macrolide antibiotics: antifungalmycin (1 ) and fungichromin (2 ) were isolated from the culture mycelia of Streptomyces padanus 702 via bioactivity-guided fractionation using various chromatographic procedures. Their structures were elucidated on the basis of spectral analysis, and 1 is a new polyene macrolide. Compounds 1 and 2 showed significant inhibition against Gibberella zeae with EC50 values of 26.71 and 2.21 µg/mL, Fusicoccum sp. (plantain head blight) with EC50 values of 23.4 and 3.17 µg/mL, Mucor ssp. 8894 with EC50 values of 28.80 and 2.11 µg/mL, Ustilaginoidea virens with EC50 values of 26.72 and 0.21 µg/mL, respectively. This shows that the microbial secondary metabolites 1 and 2 have the potential to be developed as agricultural fungicides for use against G. zeae, Fusicoccum sp., Mucor ssp. 8894, and U. virens .
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Affiliation(s)
- Yi-Fen Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Sai-Jin Wei
- Nanchang Key Laboratory of Fermentation Application Technology, China Biological Science and Engineering College of Jiangxi Agriculture University, Nanchang, 330045 China
| | - Zhi-Ping Zhang
- Nanchang Key Laboratory of Fermentation Application Technology, China Biological Science and Engineering College of Jiangxi Agriculture University, Nanchang, 330045 China
| | - Tong-He Zhan
- Nanchang Key Laboratory of Fermentation Application Technology, China Biological Science and Engineering College of Jiangxi Agriculture University, Nanchang, 330045 China
| | - Guo-Quan Tu
- Nanchang Key Laboratory of Fermentation Application Technology, China Biological Science and Engineering College of Jiangxi Agriculture University, Nanchang, 330045 China
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30
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Huang SX, Wang XJ, Yan Y, Wang JD, Zhang J, Liu CX, Xiang WS, Shen B. Neaumycin: a new macrolide from Streptomyces sp. NEAU-x211. Org Lett 2012; 14:1254-7. [PMID: 22332843 PMCID: PMC3293494 DOI: 10.1021/ol300074d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neaumycin, a new 30-membered macrolide featuring an internal diester bridge, a molecular architecture that is unprecedented among known macrolide natural products, was isolated from a soil actinomycete strain Streptomyces sp. NEAU-x211. The structure of neaumycin was elucidated on the basis of comprehensive mass and NMR spectroscopic interpretation, including the relative stereochemistry of four independent coupling systems.
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Affiliation(s)
- Sheng-Xiong Huang
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, USA
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31
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Zhao LX, Xu LH, Jiang CL. Methods for the study of endophytic microorganisms from traditional Chinese medicine plants. Methods Enzymol 2012; 517:3-21. [PMID: 23084931 DOI: 10.1016/b978-0-12-404634-4.00001-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Plant endophytes are very numerous and widely distributed in nature, their relationships being described as a balanced symbiotic continuum ranging from mutualism through commensalism to parasitism during a long period of coevolution. Traditional Chinese medicines have played a very important role in disease treatment in China and other Asian countries. Investigations show that these medicinal plants harbor endophytes with different kinds of ecological functions, and some of them have potential to produce bioactive small-molecule compounds. This chapter will focus on the selective isolation methods, the diversity of some endophytes (actinobacteria and fungi) isolated from Traditional Chinese Medicine (TCM) plants, and the bioactive compounds from selected endophytic actinobacteria reported in the past 3 years.
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Affiliation(s)
- Li-Xing Zhao
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, China
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32
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Zhao LX, Huang SX, Tang SK, Jiang CL, Duan Y, Beutler JA, Henrich CJ, McMahon JB, Schmid T, Blees JS, Colburn NH, Rajski SR, Shen B. Actinopolysporins A-C and tubercidin as a Pdcd4 stabilizer from the halophilic actinomycete Actinopolyspora erythraea YIM 90600. JOURNAL OF NATURAL PRODUCTS 2011; 74:1990-5. [PMID: 21870828 PMCID: PMC3179765 DOI: 10.1021/np200603g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Our current natural product program utilizes new actinomycetes originating from unexplored and underexplored ecological niches, employing cytotoxicity against a selected panel of cancer cell lines as the preliminary screen to identify hit strains for natural product dereplication, followed by mechanism-based assays of the purified natural products to discover potential anticancer drug leads. Three new linear polyketides, actinopolysporins A (1), B (2), and C (3), along with the known antineoplastic antibiotic tubercidin (4), were isolated from the halophilic actinomycete Actinopolyspora erythraea YIM 90600, and the structures of the new compounds were elucidated on the basis of spectroscopic data interpretation. All four compounds were assayed for their ability to stabilize the tumor suppressor programmed cell death protein 4 (Pdcd4), which is known to antagonize critical events in oncogenic pathways. Only 4 significantly inhibited proteasomal degradation of a model Pdcd4-luciferase fusion protein, with an IC50 of 0.88±0.09 μM, unveiling a novel biological activity for this well-studied natural product.
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Affiliation(s)
- Li-Xing Zhao
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People’s Republic of China
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Sheng-Xiong Huang
- Department of Chemistry, TSRI, Scripps Florida, Jupiter, FL 33458, USA
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410329, People’s Republic of China
| | - Shu-Kun Tang
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People’s Republic of China
| | - Cheng-Lin Jiang
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People’s Republic of China
| | - Yanwen Duan
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410329, People’s Republic of China
| | | | - Curtis J. Henrich
- Molecular Targets Laboratory, NCI, Frederick, MD 21702, USA
- SAIC-Frederick, Inc., NCI, Frederick, MD 21702, USA
| | | | - Tobias Schmid
- Institute of Biochemistry I/ZAFES, Faculty of Medicine, Goethe-University Frankfurt, 60590 Frankfurt, Germany
| | - Johanna S. Blees
- Institute of Biochemistry I/ZAFES, Faculty of Medicine, Goethe-University Frankfurt, 60590 Frankfurt, Germany
| | | | - Scott R. Rajski
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Ben Shen
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Chemistry, TSRI, Scripps Florida, Jupiter, FL 33458, USA
- Department of Molecular Therapeutics, TSRI, Scripps Florida, Jupiter, FL 33458, USA
- Natural Products Library Initiative, TSRI, Scripps Florida, Jupiter, FL 33458, USA
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33
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Cycloheximide and congeners as inhibitors of eukaryotic protein synthesis from endophytic actinomycetes Streptomyces sps. YIM56132 and YIM56141. J Antibiot (Tokyo) 2010; 64:163-6. [PMID: 21139626 DOI: 10.1038/ja.2010.150] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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