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Schaenzer AJ, Rodriguez Hernandez A, Tsai K, Hobson C, Fujimori DG, Wright GD. Angucyclinones rescue PhLOPS A antibiotic activity by inhibiting Cfr-dependent antibiotic resistance. mBio 2023; 14:e0179123. [PMID: 38014974 PMCID: PMC10746278 DOI: 10.1128/mbio.01791-23] [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: 07/10/2023] [Accepted: 10/16/2023] [Indexed: 11/29/2023] Open
Abstract
IMPORTANCE Cfr is an antibiotic resistance enzyme that inhibits five clinically important antibiotic classes, is genetically mobile, and has a minimal fitness cost, making Cfr a serious threat to antibiotic efficacy. The significance of our work is in discovering molecules that inhibit Cfr-dependent methylation of the ribosome, thus protecting the efficacy of the PhLOPSA antibiotics. These molecules are the first reported inhibitors of Cfr-mediated ribosome methylation and, as such, will guide the further discovery of chemical scaffolds against Cfr-mediated antibiotic resistance. Our work acts as a foundation for further development of molecules that safeguard the PhLOPSA antibiotics from Cfr.
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Affiliation(s)
- Adam J. Schaenzer
- Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Annia Rodriguez Hernandez
- Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, California, USA
| | - Kaitlyn Tsai
- Chemistry and Chemical Biology Graduate Program, University of California San Francisco, San Francisco, California, USA
| | - Christian Hobson
- Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Danica Galonić Fujimori
- Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, California, USA
- Quantitative Biosciences Institute, University of California San Francisco, San Francisco, California, USA
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, USA
| | - Gerard D. Wright
- Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
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Sarmiento-Vizcaíno A, Martín J, Ortiz-López FJ, Reyes F, García LA, Blanco G. Natural products, including a new caboxamycin, from Streptomyces and other Actinobacteria isolated in Spain from storm clouds transported by Northern winds of Arctic origin. Front Chem 2022; 10:948795. [DOI: 10.3389/fchem.2022.948795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
Actinobacteria, mostly Streptomyces species, are the main source of natural products essential in medicine. While the majority of producer microorganisms of secondary metabolite are reported from terrestrial or marine environments, there are limited reports of their isolation from atmospheric precipitations. Clouds are considered as atmospheric oases for microorganisms and there is a recent paradigm shift whereby atmospheric-derived Actinobacteria emerge as an alternative source for drug discovery. In this context, we studied a total of 18 bioactive Actinobacteria strains, isolated by sampling nine precipitation events with prevailing Northern winds in the Cantabrian Sea coast, Northern Spain. Backward trajectories meteorological analyses indicate that air masses were originated mostly in the Arctic Ocean, and their trajectory to downwind areas involved the Atlantic Ocean and also terrestrial sources from continental Europe, and in some events from Canada, Greenland, Mauritania and Canary Islands. Taxonomic identification of the isolates, by 16S rRNA gene sequencing and phylogenetic analyses, revealed that they are members of three Actinobacteria genera. Fifteen of the isolates are Streptomyces species, thus increasing the number of bioactive species of this genus in the atmosphere to a 6.8% of the total currently validated species. In addition, two of the strains belong to the genus Micromonospora and one to genus Nocardiopsis. These findings reinforce a previous atmospheric dispersal model, extended herein to the genus Micromonospora. Production of bioactive secondary metabolites was screened in ethyl acetate extracts of the strains by LC-UV-MS and a total of 94 secondary metabolites were detected after LC/MS dereplication. Comparative analyses with natural products databases allowed the identification of 69 structurally diverse natural products with contrasted biological activities, mostly as antibiotics and antitumor agents, but also anti-inflammatory, antiviral, antiparasitic, immunosuppressant and neuroprotective among others. The molecular formulae of the 25 remaining compounds were determined by HRMS. None of these molecules had been previously reported in natural product databases indicating potentially novel metabolites. As a proof of concept, a new metabolite caboxamycin B (1) was isolated from the culture broth of Streptomyces sp. A-177 and its structure was determined by various spectrometric methods. To the best of our knowledge, this is the first novel natural product obtained from an atmospheric Streptomyces, thus pointing out precipitations as an innovative source for discovering new pharmaceutical natural products.
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Ali AR, Bahrami Y, Kakaei E, Mohammadzadeh S, Bouk S, Jalilian N. Isolation and identification of endophytic actinobacteria from Citrullus colocynthis (L.) Schrad and their antibacterial properties. Microb Cell Fact 2022; 21:206. [PMID: 36217205 PMCID: PMC9548430 DOI: 10.1186/s12934-022-01936-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 10/02/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Antibiotic resistance poses a major threat to human health globally. Consequently, new antibiotics are desperately required to discover and develop from unexplored habitats to treat life-threatening infections. Microbial natural products (NP) are still remained as primary sources for the discovery of new antibiotics. Endophytic actinobacteria (EA) which are well-known producers of bioactive compounds could provide novel antibiotic against pathogenic bacteria. This research aimed to isolate EA from the Citrullus colocynthis plant and explore the antibacterial properties of their metabolites against pathogenic bacteria. RESULTS The healthy samples were collected, dissected and surface-sterilized before cultured on four different selection media at 28 °C. Six endophytic actinobacteria were isolated from Citrullus colocynthis plant. They were taxonomically classified into two family namely Streptomycetaceae and Nocardiopsaceae, based on colony morphological features, scanning electron microscope analysis and molecular identification of isolates. This is the first report on the identification of EA form Citrullus colocynthis and their antibacterial activity. The strains generated a chain of vibrio-comma, cubed or cylindrical shaped spores with indenting or smooth surfaces. Three of those were reported as endophytes for the first time. The strain KUMS-C1 showed 98.55% sequence similarity to its closely related strains which constitutes as a novel species/ strain for which the name Nocardiopsis colocynthis sp. was proposed for the isolated strain. Five isolated strains had antagonist activity against S. aureus, P. aeruginosa, and E. coli. Among those, stain KUMS-C6 showed the broadest spectrum of antibacterial activity against all test bacteria, whereas the strain KUMS-C4 had no antibacterial activity. CONCLUSIONS NPs have a long history of safe and efficient use for development of pharmaceutical products. Our study highlights that Citrullus colocynthis is an untapped source for the isolation of EA, generating novel and bioactive metabolites by which might lead to discovery of new antibiotic(s). This study reveals the future of new antibiotic developments looks bright against multi-drug resistance diseases by mining under- or unexplored habitats.
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Affiliation(s)
- Aram R Ali
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Yadollah Bahrami
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran. .,Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran. .,Department of Medical Biotechnology, School of Medicine, College of Medicine and Public Health, Flinders University, Adelaide, SA, 5042, Australia.
| | - Elham Kakaei
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sara Mohammadzadeh
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sasan Bouk
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nastaran Jalilian
- Forests and Rangelands Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, (AREEO), Kermanshah, Iran
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Sánchez-Suárez J, Coy-Barrera E, Villamil L, Díaz L. Streptomyces-Derived Metabolites with Potential Photoprotective Properties-A Systematic Literature Review and Meta-Analysis on the Reported Chemodiversity. Molecules 2020; 25:E3221. [PMID: 32679651 PMCID: PMC7397340 DOI: 10.3390/molecules25143221] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 02/07/2023] Open
Abstract
Sun overexposure is associated with the development of diseases that primarily affect the skin, which can lead to skin cancer. Among the main measures of photoprotection is the use of sunscreens. However, there is currently concern about the reported harmful effects to both humans and the environment due to several of the sunscreen ingredients available on the market. For this reason, the search for and development of new agents with photoprotective properties is required. In searching for these metabolites, researchers have turned their attention to microbial sources, especially the microbiota in unusual hostile environments. Among the diverse microorganisms available in nature, Actinobacteria and specifically Streptomyces, have been shown to be a source of metabolites with various biological activities of interest, such as antimicrobial, antitumor and immunomodulator activities. Herein, we present the results of a systematic review of the literature in which Streptomyces isolates were studied as a source of compounds with photoprotective properties. A meta-analysis of the structure-property and structure-activity relationships of those metabolites identified in the qualitative analysis phase was also carried out. These findings indicate that Streptomyces are a source of metabolites with potential applications in the development of new, safe and more eco-friendly sunscreens.
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Affiliation(s)
- Jeysson Sánchez-Suárez
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
- Bioprospecting Research Group, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia
| | - Ericsson Coy-Barrera
- Bioorganic Chemistry Laboratory, Universidad Militar Nueva Granada, Bogotá 110111, Cajicá, Cundinamarca, Colombia;
| | - Luisa Villamil
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
| | - Luis Díaz
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
- Bioprospecting Research Group, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia
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Pan BF, Su X, Hu B, Yang N, Chen Q, Wu W. Fusarium redolens 6WBY3, an endophytic fungus isolated from Fritillaria unibracteata var. wabuensis, produces peimisine and imperialine-3β-D-glucoside. Fitoterapia 2015; 103:213-21. [PMID: 25869849 DOI: 10.1016/j.fitote.2015.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/03/2015] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
Abstract
The major biological active ingredients of Bulbus Fritillariae cirrhosae (BFC) are steroidal alkaloids, such as peimisine, imperialine-3β-D-glucoside, and peimine. The bulbus of Fritillaria unibracteata var. wabuensis (FUW) was officially recorded in the National Pharmacopoeia of China (2010 edition) as one of the sources of BFC because of its positive therapeutic effects and few side effects. The endophytic fungus strain 6WBY3 was isolated from the fresh bulbus of FUW that had been cultivated for six years. Based on morphological methods and the phylogenetic analysis of internal transcribed spacer (ITS) sequences, this strain was identified as Fusarium redolens. Using color reaction analysis, high performance liquid chromatography with evaporative light scattering detection (HPLC-ELSD), and mass spectrometry (MS), it was demonstrated that F. redolens 6WBY3 could produce peimisine and imperialine-3β-D-glucoside, similar to its host plant. The yields of peimisine and imperialine-3β-D-glucoside were 16.0 μg·l(-1) and 18.8 μg·l(-1), respectively, in one week of culture. These results indicate that F. redolens 6WBY3 is a promising candidate for the large scale production of peimisine and imperialine-3β-D-glucoside. In addition, the results from the strain 6WBY3 lay the foundation for further study into the mechanism of Fritillaria alkaloids biosynthesis in fungi.
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Affiliation(s)
- By Feng Pan
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China
| | - Xuemei Su
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China
| | - Bo Hu
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China
| | - Nan Yang
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China
| | - Que Chen
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China
| | - Wei Wu
- Agronomy College, Sichuan Agricultural University, Wenjiang, 611130 Chengdu, Sichuan, PR China.
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