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de Souza Rodrigues R, de Souza AQL, Feitoza MDO, Alves TCL, Barbosa AN, da Silva Santiago SRS, de Souza ADL. Biotechnological potential of actinomycetes in the 21st century: a brief review. Antonie Van Leeuwenhoek 2024; 117:82. [PMID: 38789815 DOI: 10.1007/s10482-024-01964-y] [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: 08/31/2023] [Accepted: 04/07/2024] [Indexed: 05/26/2024]
Abstract
This brief review aims to draw attention to the biotechnological potential of actinomycetes. Their main uses as sources of antibiotics and in agriculture would be enough not to neglect them; however, as we will see, their biotechnological application is much broader. Far from intending to exhaust this issue, we present a short survey of the research involving actinomycetes and their applications published in the last 23 years. We highlight a perspective for the discovery of new active ingredients or new applications for the known metabolites of these microorganisms that, for approximately 80 years, since the discovery of streptomycin, have been the main source of antibiotics. Based on the collected data, we organize the text to show how the cosmopolitanism of actinomycetes and the evolutionary biotic and abiotic ecological relationships of actinomycetes translate into the expression of metabolites in the environment and the richness of biosynthetic gene clusters, many of which remain silenced in traditional laboratory cultures. We also present the main strategies used in the twenty-first century to promote the expression of these silenced genes and obtain new secondary metabolites from known or new strains. Many of these metabolites have biological activities relevant to medicine, agriculture, and biotechnology industries, including candidates for new drugs or drug models against infectious and non-infectious diseases. Below, we present significant examples of the antimicrobial spectrum of actinomycetes, which is the most commonly investigated and best known, as well as their non-antimicrobial spectrum, which is becoming better known and increasingly explored.
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Affiliation(s)
- Rafael de Souza Rodrigues
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil.
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil.
| | - Antonia Queiroz Lima de Souza
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
- Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
| | | | | | - Anderson Nogueira Barbosa
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
| | - Sarah Raquel Silveira da Silva Santiago
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
| | - Afonso Duarte Leão de Souza
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
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Wang X, Wang R, He S, Weng Y, Lan B, Zhou L, Yang H. Biocontrol potential of Bacillus velezensis wr8 secondary metabolites against Penicillium sp. Gene 2024; 892:147872. [PMID: 37802404 DOI: 10.1016/j.gene.2023.147872] [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: 07/24/2023] [Revised: 09/26/2023] [Accepted: 10/03/2023] [Indexed: 10/10/2023]
Abstract
The aim of this study was to isolate and identify native Bacillus from citrus fruits, with inhibition phenotypes to Penicillium sp. We investigated the antifungal effect of Bacillus velezensis wr8 on the postharvest pathogens Penicillium sp. inoculated on fruits, as well as on the growth of these fungi on Petri dishes with defined media. MALDI-TOF MS was conducted to enlighten the underlying mechanism. Results showed that Bacillus velezensis wr8 significantly inhibited Penicillium sp. growth in vitro. Moreover, secondary metabolites suppressed the disease development of citrus fruits artificially inoculated with Penicillium sp. in 25 °C. Furthermore, MALDI-TOF MS indicated that lipoprotein with the molecular mass of 30.2 kDa was a key component about against Penicillium sp. In addition, the secondary metabolites with antibacterial activity against Escherichia coli showed antimicrobial peptide with the molecular weight of 9.8 kDa. These results demonstrated that Bacillus velezensis wr8 could produce lipoprotein and antimicrobial peptide to inhibit Penicillium sp. and Escherichia coli which has broad application prospect in the future development. Finally, Bacillus velezensis wr8 is to provide data support for the development and utilization of high activity bacteriocin at room temperature and its application in the field of food safety.
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Affiliation(s)
- Xiaohu Wang
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Rui Wang
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Shang He
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Yuting Weng
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Baofeng Lan
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Liqin Zhou
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China.
| | - Hui Yang
- Guangxi Academy of Sciences, Nanning 530003, China; College of Life Science and Technology, Guangxi University, Nanning 530005, China.
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Delbari Y, Mohassel Y, Kakaei E, Bahrami Y. Identification and anti-bacterial property of endophytic actinobacteria from Thymes kotschyanus, Allium hooshidaryae, and Cerasus microcarpa. Sci Rep 2023; 13:13145. [PMID: 37573468 PMCID: PMC10423286 DOI: 10.1038/s41598-023-40478-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/10/2023] [Indexed: 08/14/2023] Open
Abstract
The arbitrary and overuses of antibiotics have resulted in the emergence of multidrug resistance bacteria which encounters human to a serious public health problem. Thus, there is an ever-increasing demand for discovery of novel effective antibiotics with new modes of function against resistant pathogens. Endophytic actinobacteria (EA) have currently been considered as one of the most prospective group of microorganisms for discovery of therapeutic agents. This study aimed to isolate EA from Thymes kotschyanus, Allium hooshidaryae, and Cerasus microcarpa plants and to evaluate their antibacterial properties. The healthy samples were collected, dissected and surface-sterilized before cultured on four different selection media at 28 °C. Nine EA were isolated and identified based on morphological and molecular properties, and scanning electron micrograph analyses. Based on phylogenetic analysis, they were taxonomically grouped into four families Streptomycetaceae, Nocardiaceae, Micromonosporaceae, and Pseudonocardiaceae. Their branched aerial mycelia produced chains of cylindrical or cube or oval shaped spores with smooth or rough surfaces. Four strains; IKBG03, IKBG05, IKBG13, and IKBG17 had less than 98.65% sequence similarity to their closely related strains, which constitute them as novel species/strains. Besides, three strains; IKBG05, IKBG13, and IKBG18 were reported as endophytes for the first time. Preliminary antibacterial activity conducted on the all isolates revealed potent antibacterial effects against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. All isolates strongly inhibited the growth of at least one of the tested pathogens. Our results reveals that the test plants are novel sources for isolating a diverse group of rare and common actinobacteria that could produce a wide range of novel biologically active natural products with antibacterial activity which have a great potential in pharmaceutical and biotechnological applications.
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Affiliation(s)
- Yaser Delbari
- Department of Medical Biotechnology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Yaser Mohassel
- Department of Clinical Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Elham Kakaei
- 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.
- Advanced Marine Biomanufacturing Laboratory, Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, SA, 5042, Australia.
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Identification and antibacterial evaluation of endophytic actinobacteria from Luffa cylindrica. Sci Rep 2022; 12:18236. [PMID: 36309579 PMCID: PMC9617871 DOI: 10.1038/s41598-022-23073-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/25/2022] [Indexed: 12/31/2022] Open
Abstract
The emergence of antibiotic-resistant bacteria has limited treatment options and led to the untreatable infections, thereby necessitating the discovery of new antibiotics to battel against bacteria. Natural products from endophytic actinobacteria (EA) serve as a reservoir for discovery of new antibiotics. Therefore, the current study focused on the isolation and antibacterial properties of EA isolated from Luffa cylindrica. Six strains were identified using morphological characterization, SEM analyses and 16S rRNA gene sequencing from the roots and leaves of the plant. They were taxonomically classified as Streptomycetaceae family. This is the first report on EA form L. cylindrica. The strains produced a chain of oval, cubed or cylindrical shaped spores with spiny or smooth surfaces. Three strains; KUMS-B3, KUMS-B4 and KUMS-B6 were reported as endophytes for the first time. Fifty percent of isolates were isolated from leaves samples using YECD medium. Our results showed that the sampling time and seasons may affect the bacterial diversity. All six strains had antibacterial activity against at least one of the tested bacteria S. aureus, P. aeruginosa, and E. coli. Among the strains, KUMS-B6 isolate, closely related to S. praecox, exhibited the highest antibacterial activity against both gram-positive and negative bacteria. KUMS-B6, KUMS-B5 and KUMS-B4 isolates strongly inhibited the growth of P. aeruginosa. Interestingly, the strains, isolated from leaves exhibited stronger antagonist activities compared to those isolated from the roots. The study revealed that the isolated strains from Luffa produce a plethora of bioactive substances that are potential source of new drug candidates for the treatment of infections.
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