1
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Waschulin V, Borsetto C, Corre C, Wellington EM. Design and validation of a PCR screen for γ-butyrolactone-like regulatory systems in Streptomyces. Access Microbiol 2023; 5:000661.v3. [PMID: 37841097 PMCID: PMC10569655 DOI: 10.1099/acmi.0.000661.v3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/25/2023] [Indexed: 10/17/2023] Open
Abstract
γ-butyrolactone and related signalling systems are found in Streptomyces and other actinobacteria where they control the production of secondary or specialized metabolites such as antibiotics. Genetic manipulation of these regulatory systems therefore leads to changes in the secondary metabolite profile of a strain and has been used to activate previously silent secondary metabolite gene clusters. However, there is no easy way to assess the presence of γ-butyrolactone-like systems in Streptomyces strains without whole-genome sequencing. We have therefore developed and tested a PCR screen that is able to detect homologues of the commonly co-located butenolide synthase and γ-butyrolactone receptor genes. This PCR screen could be employed for the screening of strain libraries to detect signalling systems without the necessity for whole-genome sequencing.
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Affiliation(s)
| | - Chiara Borsetto
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
| | - Christophe Corre
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
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2
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Matsui N, Kawakami S, Hamamoto D, Nohara S, Sunada R, Panbangred W, Igarashi Y, Nihira T, Kitani S. Activation of cryptic milbemycin A 4 production in Streptomyces sp. BB47 by the introduction of a functional bldA gene. J GEN APPL MICROBIOL 2021; 67:240-247. [PMID: 34511540 DOI: 10.2323/jgam.2021.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Streptomycetes are characterized by their ability to produce structurally diverse compounds as secondary metabolites and by their complex developmental life cycle, which includes aerial mycelium formation and sporulation. The production of secondary metabolites is growth-stage dependent, and generally coincides with morphological development on a solid culture. Streptomyces sp. BB47 produces several types of bioactive compounds and displays a bald phenotype that is devoid of an aerial mycelium and spores. Here, we demonstrated by genome analysis and gene complementation experiments that the bald phenotype arises from the bldA gene, which is predicted to encode the Leu-tRNAUUA molecule. Unlike the wild-type strain producing jomthonic acid A (1) and antarlide A (2), the strain complemented with a functional bldA gene newly produced milbemycin (3). The chemical structure of compound 3 was elucidated on the basis of various spectroscopic analyses, and was identified as milbemycin A4, which is an insecticidal/acaricidal antibiotic. These results indicate that genetic manipulation of genes involved in morphological development in streptomycetes is a valuable way to activate cryptic biosynthetic pathways.
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Affiliation(s)
- Nana Matsui
- International Center for Biotechnology, Osaka University
| | | | - Dai Hamamoto
- International Center for Biotechnology, Osaka University
| | - Sayuri Nohara
- International Center for Biotechnology, Osaka University
| | - Reina Sunada
- International Center for Biotechnology, Osaka University
| | | | | | - Takuya Nihira
- International Center for Biotechnology, Osaka University.,MU-OU Collaborative Research Center for Bioscience and Biotechnology, Faculty of Science, Mahidol University
| | - Shigeru Kitani
- International Center for Biotechnology, Osaka University.,Industrial Biotechnology Initiative Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University
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3
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Li Y, Wang M, Sun ZZ, Xie BB. Comparative Genomic Insights Into the Taxonomic Classification, Diversity, and Secondary Metabolic Potentials of Kitasatospora, a Genus Closely Related to Streptomyces. Front Microbiol 2021; 12:683814. [PMID: 34194415 PMCID: PMC8236941 DOI: 10.3389/fmicb.2021.683814] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/20/2021] [Indexed: 11/25/2022] Open
Abstract
While the genus Streptomyces (family Streptomycetaceae) has been studied as a model for bacterial secondary metabolism and genetics, its close relatives have been less studied. The genus Kitasatospora is the second largest genus in the family Streptomycetaceae. However, its taxonomic position within the family remains under debate and the secondary metabolic potential remains largely unclear. Here, we performed systematic comparative genomic and phylogenomic analyses of Kitasatospora. Firstly, the three genera within the family Streptomycetaceae (Kitasatospora, Streptomyces, and Streptacidiphilus) showed common genomic features, including high G + C contents, high secondary metabolic potentials, and high recombination frequencies. Secondly, phylogenomic and comparative genomic analyses revealed phylogenetic distinctions and genome content differences among these three genera, supporting Kitasatospora as a separate genus within the family. Lastly, the pan-genome analysis revealed extensive genetic diversity within the genus Kitasatospora, while functional annotation and genome content comparison suggested genomic differentiation among lineages. This study provided new insights into genomic characteristics of the genus Kitasatospora, and also uncovered its previously underestimated and complex secondary metabolism.
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Affiliation(s)
- Yisong Li
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, China
| | - Meng Wang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, China
| | - Zhong-Zhi Sun
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, China
| | - Bin-Bin Xie
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, China
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4
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Creamer KE, Kudo Y, Moore BS, Jensen PR. Phylogenetic analysis of the salinipostin γ-butyrolactone gene cluster uncovers new potential for bacterial signalling-molecule diversity. Microb Genom 2021; 7:000568. [PMID: 33979276 PMCID: PMC8209734 DOI: 10.1099/mgen.0.000568] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/24/2021] [Indexed: 12/19/2022] Open
Abstract
Bacteria communicate by small-molecule chemicals that facilitate intra- and inter-species interactions. These extracellular signalling molecules mediate diverse processes including virulence, bioluminescence, biofilm formation, motility and specialized metabolism. The signalling molecules produced by members of the phylum Actinobacteria generally comprise γ-butyrolactones, γ-butenolides and furans. The best-known actinomycete γ-butyrolactone is A-factor, which triggers specialized metabolism and morphological differentiation in the genus Streptomyces . Salinipostins A–K are unique γ-butyrolactone molecules with rare phosphotriester moieties that were recently characterized from the marine actinomycete genus Salinispora . The production of these compounds has been linked to the nine-gene biosynthetic gene cluster (BGC) spt . Critical to salinipostin assembly is the γ-butyrolactone synthase encoded by spt9 . Here, we report the surprising distribution of spt9 homologues across 12 bacterial phyla, the majority of which are not known to produce γ-butyrolactones. Further analyses uncovered a large group of spt -like gene clusters outside of the genus Salinispora , suggesting the production of new salinipostin-like diversity. These gene clusters show evidence of horizontal transfer and location-specific recombination among Salinispora strains. The results suggest that γ-butyrolactone production may be more widespread than previously recognized. The identification of new γ-butyrolactone BGCs is the first step towards understanding the regulatory roles of the encoded small molecules in Actinobacteria.
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Affiliation(s)
- Kaitlin E. Creamer
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
| | - Yuta Kudo
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
- Present address: Frontier Research Institute for Interdisciplinary Sciences, Japan Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Bradley S. Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Paul R. Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
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5
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Li Z, Li S, Du L, Zhang X, Jiang Y, Liu W, Zhang W, Li S. Engineering Bafilomycin High-Producers by Manipulating Regulatory and Biosynthetic Genes in the Marine Bacterium Streptomyces lohii. Mar Drugs 2021; 19:md19010029. [PMID: 33440628 PMCID: PMC7827423 DOI: 10.3390/md19010029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/25/2020] [Accepted: 01/08/2021] [Indexed: 11/16/2022] Open
Abstract
Bafilomycin A1 is the representative compound of the plecomacrolide natural product family. This 16-membered ring plecomacrolide has potent antifungal and vacuolar H+-ATPase inhibitory activities. In our previous work, we identified a bafilomycin biosynthetic gene cluster (baf) from the marine bacterium Streptomyces lohii ATCC BAA-1276, wherein a luxR family regulatory gene orf1 and an afsR family regulatory gene bafG were revealed based on bioinformatics analysis. In this study, the positive regulatory roles of orf1 and bafG for bafilomycin biosynthesis are characterized through gene inactivation and overexpression. Compared to the wild-type S. lohii strain, the knockout of either orf1 or bafG completely abolished the production of bafilomycins. The overexpression of orf1 or bafG led to 1.3- and 0.5-fold increased production of bafilomycins, respectively. A genetically engineered S. lohii strain (SLO-08) with orf1 overexpression and inactivation of the biosynthetic genes orf2 and orf3, solely produced bafilomycin A1 with the titer of 535.1 ± 25.0 mg/L in an optimized fermentation medium in shaking flasks. This recombinant strain holds considerable application potential in large-scale production of bafilomycin A1 for new drug development.
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Affiliation(s)
- Zhong Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
- Shandong Provincial Key Laboratory of Synthetic Biology, CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuai Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
| | - Lei Du
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
| | - Xingwang Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
| | - Yuanyuan Jiang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
- Shandong Provincial Key Laboratory of Synthetic Biology, CAS Key Laboratory of Biofuels at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenhua Liu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
| | - Wei Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
| | - Shengying Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; (Z.L.); (S.L.); (L.D.); (X.Z.); (Y.J.); (W.L.); (W.Z.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Correspondence:
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6
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Kudo Y, Awakawa T, Du YL, Jordan PA, Creamer KE, Jensen PR, Linington RG, Ryan KS, Moore BS. Expansion of Gamma-Butyrolactone Signaling Molecule Biosynthesis to Phosphotriester Natural Products. ACS Chem Biol 2020; 15:3253-3261. [PMID: 33232109 DOI: 10.1021/acschembio.0c00824] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bacterial hormones, such as the iconic gamma-butyrolactone A-factor, are essential signaling molecules that regulate diverse physiological processes, including specialized metabolism. These low molecular weight compounds are common in Streptomyces species and display species-specific structural differences. Recently, unusual gamma-butyrolactone natural products called salinipostins were isolated from the marine actinomycete genus Salinispora based on their antimalarial properties. As the salinipostins possess a rare phosphotriester motif of unknown biosynthetic origin, we set out to explore its construction by the widely conserved 9-gene spt operon in Salinispora species. We show through a series of in vivo and in vitro studies that the spt gene cluster dually encodes the salinipostins and newly identified natural A-factor-like gamma-butyrolactones (Sal-GBLs). Remarkably, homologous biosynthetic gene clusters are widely distributed among many actinomycete genera, including Streptomyces, suggesting the significance of this operon in bacteria.
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Affiliation(s)
- Yuta Kudo
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8572, Japan
| | - Takayoshi Awakawa
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yi-Ling Du
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Peter A. Jordan
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Kaitlin E. Creamer
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Paul R. Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Roger G. Linington
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Katherine S. Ryan
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Bradley S. Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California 92093, United States
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7
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Misaki Y, Yamamoto S, Suzuki T, Iwakuni M, Sasaki H, Takahashi Y, Inada K, Kinashi H, Arakawa K. SrrB, a Pseudo-Receptor Protein, Acts as a Negative Regulator for Lankacidin and Lankamycin Production in Streptomyces rochei. Front Microbiol 2020; 11:1089. [PMID: 32582072 PMCID: PMC7296167 DOI: 10.3389/fmicb.2020.01089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/30/2020] [Indexed: 11/15/2022] Open
Abstract
Streptomyces rochei 7434AN4, a producer of lankacidin (LC) and lankamycin (LM), carries many regulatory genes including a biosynthesis gene for signaling molecules SRBs (srrX), an SRB receptor gene (srrA), and a SARP (Streptomyces antibiotic regulatory protein) family activator gene (srrY). Our previous study revealed that the main regulatory cascade goes from srrX through srrA to srrY, leading to LC production, whereas srrY further regulates a second SARP gene srrZ to synthesize LM. In this study we extensively investigated the function of srrB, a pseudo-receptor gene, by analyzing antibiotic production and transcription. Metabolite analysis showed that the srrB mutation increased both LC and LM production over four-folds. Transcription, gel shift, and DNase I footprinting experiments revealed that srrB and srrY are expressed under the SRB/SrrA regulatory system, and at the later stage, SrrB represses srrY expression by binding to the promoter region of srrY. These findings confirmed that SrrB acts as a negative regulator of the activator gene srrY to control LC and LM production at the later stage of fermentation in S. rochei.
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Affiliation(s)
- Yuya Misaki
- Unit of Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.,Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Shouji Yamamoto
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Toshihiro Suzuki
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Miyuki Iwakuni
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Hiroaki Sasaki
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Yuzuru Takahashi
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kuninobu Inada
- Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Japan
| | - Haruyasu Kinashi
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kenji Arakawa
- Unit of Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.,Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
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8
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Primahana G, Risdian C, Mozef T, Sudarman E, Köck M, Wink J, Stadler M. Nonocarbolines A-E, β-Carboline Antibiotics Produced by the Rare Actinobacterium Nonomuraea sp. from Indonesia. Antibiotics (Basel) 2020; 9:E126. [PMID: 32192170 PMCID: PMC7148486 DOI: 10.3390/antibiotics9030126] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/12/2020] [Accepted: 03/14/2020] [Indexed: 12/12/2022] Open
Abstract
During the course of our ongoing screening for novel biologically active secondary metabolites, the rare Actinobacterium, Nonomuraea sp. 1808210CR was found to produce five unprecedented β-carboline derivatives, nonocarbolines A-E (1-5). Their structures were elucidated from high-resolution mass spectrometry, 1D and 2D nuclear magnetic resonance spectroscopy, and the absolute configuration of 4 was determined by using the modified Mosher method. Nonocarboline B (2) displayed moderate antifungal activity against Mucor hiemalis, while nonocarboline D (4) exhibited significant cytotoxic activity against the human lung carcinoma cell line A-549 with the IC50 value of 1.7 µM.
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Affiliation(s)
- Gian Primahana
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (E.S.)
- Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek, Serpong, 15314 Tangerang Selatan, Indonesia;
| | - Chandra Risdian
- Working group Microbial Strain Collection, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (C.R.); (J.W.)
- Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI), Bandung 40135, Indonesia
| | - Tjandrawati Mozef
- Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek, Serpong, 15314 Tangerang Selatan, Indonesia;
| | - Enge Sudarman
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (E.S.)
| | - Matthias Köck
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany;
| | - Joachim Wink
- Working group Microbial Strain Collection, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (C.R.); (J.W.)
| | - Marc Stadler
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (E.S.)
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9
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Villarruel F, Denofrio MP, Rasse-Suriani FAO, García Einschlag FS, Schmidt De León T, Erra-Balsells R, Cabrerizo FM. Light-induced full aromatization and hydroxylation of 7-methoxy-1-methyl-3,4-dihydro-2H-pyrido[3,4-b]indole alkaloid: Oxygen partial pressure as a key modulator of the photoproducts distribution. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2019; 199:111600. [PMID: 31473429 DOI: 10.1016/j.jphotobiol.2019.111600] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 08/12/2019] [Accepted: 08/20/2019] [Indexed: 10/26/2022]
Abstract
Full-aromatic and partially hydrogenated β-carboline (βC) derivatives constitute a group of alkaloids widely distributed in a great variety of living systems. In plants and bacteria, tetrahydro-βCs are the primary product of the Pictet-Spengler enzymatically catalyzed condensation. Tetrahydro-βC skeleton is further modified giving rise to the formation of a vast set of derivatives including dihydro- and full-aromatic βCs. However, in most of the cases, the later processes still remain unclear and other sources, such as photo-triggered reactions, deserve to be explored. In this context, the photophysic and photochemistry of 7-methoxy-1-methyl-3,4-dihydro-2H-pyrido[3,4-b]indole or harmaline (Hlina) in aqueous solution is reported herein. UV-visible absorption and fluorescence emission spectroscopy coupled with multivariate data analysis (PARAFAC), HPLC and HRESI-MS techniques were used for both quantitative and qualitative analysis. The formation singlet oxygen and hydrogen peroxide reactive oxygen species (ROS) was quantified and their role together with the influence of pH and oxygen partial pressure on the photochemical degradation of HlinaH+ was assessed. We report herein the first study on photochemical full-aromatization of a dihydro-βC derivative. These results can shed some light on the βCs biosynthesis and role in living systems.
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Affiliation(s)
- Fernando Villarruel
- Instituto Tecnológico de Chascomús (INTECH), Universidad Nacional de San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Intendente Marino Km 8.2, CC 164, B7130IWA Chascomús, Argentina; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, Universidad Nacional de La Plata, Diag. 113 y 64, 1900 La Plata, Argentina
| | - M Paula Denofrio
- Instituto Tecnológico de Chascomús (INTECH), Universidad Nacional de San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Intendente Marino Km 8.2, CC 164, B7130IWA Chascomús, Argentina
| | - Federico A O Rasse-Suriani
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, Universidad Nacional de La Plata, Diag. 113 y 64, 1900 La Plata, Argentina
| | - Fernando S García Einschlag
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, Universidad Nacional de La Plata, Diag. 113 y 64, 1900 La Plata, Argentina
| | - Tobías Schmidt De León
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Pabellón II, 3er P., Ciudad Universitaria, 1428 Buenos Aires, Argentina; CONICET, Universidad de Buenos Aires, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Facultad de Ciencias Exactas y Naturales, Pabellón II, 3er P., Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Rosa Erra-Balsells
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Pabellón II, 3er P., Ciudad Universitaria, 1428 Buenos Aires, Argentina; CONICET, Universidad de Buenos Aires, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Facultad de Ciencias Exactas y Naturales, Pabellón II, 3er P., Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Franco M Cabrerizo
- Instituto Tecnológico de Chascomús (INTECH), Universidad Nacional de San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Intendente Marino Km 8.2, CC 164, B7130IWA Chascomús, Argentina.
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10
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Identification of biosynthetic genes for the β-carboline alkaloid kitasetaline and production of the fluorinated derivatives by heterologous expression. ACTA ACUST UNITED AC 2019; 46:739-750. [DOI: 10.1007/s10295-019-02151-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/12/2019] [Indexed: 01/07/2023]
Abstract
Abstract
β-Carboline alkaloids exhibit a broad spectrum of pharmacological and biological activities and are widely distributed in nature. Genetic information on the biosynthetic mechanism of β-carboline alkaloids has not been accumulated in bacteria, because there are only a few reports on the microbial β-carboline compounds. We previously isolated kitasetaline, a mercapturic acid derivative of a β-carboline compound, from the genetically modified Kitasatospora setae strain and found a plausible biosynthetic gene cluster for kitasetaline. Here, we identified and characterized three kitasetaline (ksl) biosynthetic genes for the formation of the β-carboline core structure and a gene encoding mycothiol-S-conjugate amidase for the modification of the N-acetylcysteine moiety by using heterologous expression. The proposed model of kitasetaline biosynthesis shows unique enzymatic systems for β-carboline alkaloids. In addition, feeding fluorotryptophan to the heterologous Streptomyces hosts expressing the ksl genes led to the generation of unnatural β-carboline alkaloids exerting novel/potentiated bioactivities.
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11
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van der Heul HU, Bilyk BL, McDowall KJ, Seipke RF, van Wezel GP. Regulation of antibiotic production in Actinobacteria: new perspectives from the post-genomic era. Nat Prod Rep 2019; 35:575-604. [PMID: 29721572 DOI: 10.1039/c8np00012c] [Citation(s) in RCA: 145] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Covering: 2000 to 2018 The antimicrobial activity of many of their natural products has brought prominence to the Streptomycetaceae, a family of Gram-positive bacteria that inhabit both soil and aquatic sediments. In the natural environment, antimicrobial compounds are likely to limit the growth of competitors, thereby offering a selective advantage to the producer, in particular when nutrients become limited and the developmental programme leading to spores commences. The study of the control of this secondary metabolism continues to offer insights into its integration with a complex lifecycle that takes multiple cues from the environment and primary metabolism. Such information can then be harnessed to devise laboratory screening conditions to discover compounds with new or improved clinical value. Here we provide an update of the review we published in NPR in 2011. Besides providing the essential background, we focus on recent developments in our understanding of the underlying regulatory networks, ecological triggers of natural product biosynthesis, contributions from comparative genomics and approaches to awaken the biosynthesis of otherwise silent or cryptic natural products. In addition, we highlight recent discoveries on the control of antibiotic production in other Actinobacteria, which have gained considerable attention since the start of the genomics revolution. New technologies that have the potential to produce a step change in our understanding of the regulation of secondary metabolism are also described.
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12
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Copper amine oxidases catalyze the oxidative deamination and hydrolysis of cyclic imines. Nat Commun 2019; 10:413. [PMID: 30679427 PMCID: PMC6345859 DOI: 10.1038/s41467-018-08280-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 12/28/2018] [Indexed: 01/26/2023] Open
Abstract
Although cyclic imines are present in various bioactive secondary metabolites, their degradative metabolism remains unknown. Here, we report that copper amine oxidases, which are important in metabolism of primary amines, catalyze a cyclic imine cleavage reaction. We isolate a microorganism (Arthrobacter sp. C-4A) which metabolizes a β-carboline alkaloid, harmaline. The harmaline-metabolizing enzyme (HarA) purified from strain C-4A is found to be copper amine oxidase and catalyze a ring-opening reaction of cyclic imine within harmaline, besides oxidative deamination of amines. Growth experiments on strain C-4A and Western blot analysis indicate that the HarA expression is induced by harmaline. We propose a reaction mechanism of the cyclic imine cleavage by HarA containing a post-translationally-synthesized cofactor, topaquinone. Together with the above results, the finding of the same activity of copper amine oxidase from E. coli suggests that, in many living organisms, these enzymes may play crucial roles in metabolism of ubiquitous cyclic imines.
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13
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Engineered production of kitasetalic acid, a new tetrahydro-β-carboline with the ability to suppress glucose-regulated protein synthesis. J Antibiot (Tokyo) 2018; 71:854-861. [PMID: 29973681 DOI: 10.1038/s41429-018-0074-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/13/2018] [Accepted: 05/20/2018] [Indexed: 12/28/2022]
Abstract
β-Carboline alkaloids and related compounds show a broad spectrum of biological activities. We previously identified new members of the β-carboline alkaloid family by using an engineered Kitasatospora setae strain and a heterologous Streptomyces host expressing the plausible biosynthetic genes, including the hypothetical gene kse_70640 (kslB). Here, we elucidated the chemical structure of a new tetrahydro-β-carboline compound (named kitasetalic acid) that appeared in a heterologous Streptomyces host expressing the kslB gene alone. Kitasetalic acid suppressed the expression of glucose-regulated protein 78 (GRP78) without inducing cell death. This is the first report to show that a tetrahydro-β-carboline compound regulates the expression of the GRP78 protein in cancer cell lines.
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Chen Q, Zhang S, Xie Y. Characterization of a new microbial Pictet-Spenglerase NscbB affording the β-carboline skeletons from Nocardiopsis synnemataformans DSM 44143. J Biotechnol 2018; 281:137-143. [PMID: 29981450 DOI: 10.1016/j.jbiotec.2018.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 06/29/2018] [Accepted: 07/03/2018] [Indexed: 11/19/2022]
Abstract
The enzymatic Pictet-Spengler (PS) reaction, catalyzed by Pictet-Spenglerase (PSase), is the feature of β-carboline (βC) alkaloid biosynthesis. NscbB is a rare microbial PSase discovered from a cryptic β-carboline alkaloid biosynthetic gene cluster (BGC) in the Nocardiopsis synnemataformans DSM 44143 (kidney transplant patient derived) by homologous alignment with its well-characterized counterpart McbB. The biochemical analysis showed that NscbB could catalyze l-tryptophan (KM = 89.64 ± 8.69 μM) and methylglyoxal (KM = 147.70 ± 16.38 μM), without cofactors, to form the two βC skeletons 1-acetyl-3-carboxy-β-carboline and 1-acetyl-β-carboline in vitro. Additionally, the heterologous expression of nscbB in E. coli BL21 (DE3) revealed the efficient bioproductivity of NscbB to bioproduce two βC skeletons, 1-acetyl-3-carboxy-β-carboline (5.5 mg/L) and 1-acetyl-β-carboline (3.1 mg/L), within 16 h fermentation. These results demonstrate NscbB is a novel and practical microbial PSase, which is useful for future bioactive βC alkaloid exploitation and development.
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Affiliation(s)
- Qi Chen
- School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Shaofei Zhang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Yunchang Xie
- CAS Key Laboratory of Tropical Marine Bioresources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center of Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
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15
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Arakawa K. Manipulation of metabolic pathways controlled by signaling molecules, inducers of antibiotic production, for genome mining in Streptomyces spp. Antonie van Leeuwenhoek 2018; 111:743-751. [PMID: 29476430 DOI: 10.1007/s10482-018-1052-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 02/19/2018] [Indexed: 10/18/2022]
Abstract
Streptomyces is well characterized by an ability to produce a wide variety of secondary metabolites including antibiotics, whose expression is strictly controlled by small diffusible signaling molecules at nano-molar concentrations. The signaling molecules identified to date are classified into three skeletons; γ-butyrolactones, furans, and γ-butenolides. Accumulated data suggest the structural diversity of the signaling molecules in Streptomyces species and their potential in activating cryptic secondary metabolite biosynthetic pathways. Several genome mining approaches to activate silent biosynthetic gene clusters have been reported for natural product discovery. This review updates recent examples on genetic manipulation including blockage of metabolic pathways together with inactivation of transcriptional repressor genes.
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Affiliation(s)
- Kenji Arakawa
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8530, Japan.
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16
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Suroto DA, Kitani S, Miyamoto KT, Sakihama Y, Arai M, Ikeda H, Nihira T. Activation of cryptic phthoxazolin A production in Streptomyces avermitilis by the disruption of autoregulator-receptor homologue AvaR3. J Biosci Bioeng 2017; 124:611-617. [PMID: 28728974 DOI: 10.1016/j.jbiosc.2017.06.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/08/2017] [Accepted: 06/26/2017] [Indexed: 11/28/2022]
Abstract
The genomes of actinomycetes encode many cryptic novel/useful bioactive compounds, but access to these cryptic secondary metabolites remains limited. Streptomyces avermitilis predominantly produces three polyketide antibiotics (avermectin, filipin, and oligomycin) but has the potential to produce more secondary metabolites based on the number of cryptic biosynthetic gene clusters. Here, we extensively investigated the metabolite profiles of a gene disruptant of AvaR3 (an autoregulator receptor homologue), which is involved in the pleiotropic regulation of antibiotic production and cell morphology. Unlike the wild-type strain, the avaR3 mutant accumulated compound 3 in the culture. The chemical structure of compound 3 was elucidated on the basis of various spectroscopic analyses, and was identified as phthoxazolin A, a cellulose synthesis inhibitor. Bioassays demonstrated that compound 3 exerts growth inhibitory activity against a broad range of plant pathogenic oomycetes. Moreover, unlike avermectin production, phthoxazolin A (3) production was negatively controlled by avenolide, a new type of autoregulator in streptomycetes, through the function of AvaR3. These results suggest that the genetic manipulation of autoregulator receptor homologues would be a valuable tool for the discovery of cryptic bioactive compounds.
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Affiliation(s)
- Dian Anggraini Suroto
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shigeru Kitani
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kiyoko T Miyamoto
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yasuko Sakihama
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Masayoshi Arai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Haruo Ikeda
- Kitasato Institute for Life Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Takuya Nihira
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; MU-OU Collaborative Research Center for Bioscience and Biotechnology, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok 10400, Thailand.
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17
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Takahashi Y. Genus Kitasatospora, taxonomic features and diversity of secondary metabolites. J Antibiot (Tokyo) 2017; 70:506-513. [PMID: 28196972 DOI: 10.1038/ja.2017.8] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/05/2017] [Accepted: 01/11/2017] [Indexed: 12/31/2022]
Abstract
The genus Kitasatospora was proposed in 1982. Although Kitasatospora strains resemble Streptomyces strains in morphology, they are clearly different in cell-wall composition, as they contain both LL- and meso-diaminopimelic acid. Aerial and submerged spores contain LL-, while vegetative and submerged mycelia contain mainly meso- in their cell walls. Currently, 23 species have been validly proposed. Members of the genus Kitasatospora form a tight cluster and represent a legitimate genus distinct from Streptomyces on the basis of phylogenetic analysis of 16S rRNA gene sequences. A variety of biologically active compounds have been found from Kitasatospora strains and structures of these compounds are extremely diverse. Genome sequences of 15 strains published so far are about 7-9 Mb in size and contain many genes governing secondary metabolites.
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Affiliation(s)
- Yōko Takahashi
- Kitasato Institute for Life Sciences, Kitasato University, Minato-ku, Tokyo, Japan
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18
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Sultan SP, Kitani S, Miyamoto KT, Iguchi H, Atago T, Ikeda H, Nihira T. Characterization of AvaR1, a butenolide-autoregulator receptor for biosynthesis of a Streptomyces hormone in Streptomyces avermitilis. Appl Microbiol Biotechnol 2016; 100:9581-9591. [DOI: 10.1007/s00253-016-7781-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 07/25/2016] [Accepted: 08/02/2016] [Indexed: 10/21/2022]
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19
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Kurniawan YN, Kitani S, Iida A, Maeda A, Lycklama a Nijeholt J, Lee YJ, Nihira T. Regulation of production of the blue pigment indigoidine by the pseudo γ-butyrolactone receptor FarR2 in Streptomyces lavendulae FRI-5. J Biosci Bioeng 2016; 121:372-9. [DOI: 10.1016/j.jbiosc.2015.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 07/30/2015] [Accepted: 08/23/2015] [Indexed: 02/05/2023]
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20
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Intra B, Euanorasetr J, Nihira T, Panbangred W. Characterization of a gamma-butyrolactone synthetase gene homologue (stcA) involved in bafilomycin production and aerial mycelium formation in Streptomyces sp. SBI034. Appl Microbiol Biotechnol 2015; 100:2749-60. [PMID: 26603758 DOI: 10.1007/s00253-015-7142-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 11/26/2022]
Abstract
Streptomyces SBI034 produces several bafilomycin derivatives. Its afsA homologue (stcA) and putative γ-butyrolactone receptor gene (stcB) were cloned. Construction of a stcA disruptant (stcA gene knockout) resulted in complete abolishment of all bafilomycin production. Electron microscopic analysis showed a defect of aerial mycelium formation and sporulation in the stcA disruptant. Restoration of all phenotypic defects and bafilomycin production was observed in a stcA complemented strain. Addition of exogenous γ-butyrolactone (GBL) extracted from the culture broth of the wild-type strain could stimulate the aerial mycelium and spore formation of the stcA disruptant. These results suggest that stcA plays a role in GBL-mediated regulation of bafilomycin biosynthesis and morphological development in Streptomyces strain SBI034.
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Affiliation(s)
- Bungonsiri Intra
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
- Osaka Collaborative Research Center on Bioscience and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Jirayut Euanorasetr
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
- Osaka Collaborative Research Center on Bioscience and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Takuya Nihira
- Osaka Collaborative Research Center on Bioscience and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
- International Center for Biotechnology, Osaka University, Osaka, 565-0871, Japan
| | - Watanalai Panbangred
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
- Osaka Collaborative Research Center on Bioscience and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
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21
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Daduang R, Kitani S, Hashimoto J, Thamchaipenet A, Igarashi Y, Shin-ya K, Ikeda H, Nihira T. Characterization of the biosynthetic gene cluster for maklamicin, a spirotetronate-class antibiotic of the endophytic Micromonospora sp. NBRC 110955. Microbiol Res 2015; 180:30-9. [DOI: 10.1016/j.micres.2015.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/08/2015] [Accepted: 07/11/2015] [Indexed: 10/23/2022]
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22
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Kunitake H, Hiramatsu T, Kinashi H, Arakawa K. Isolation and Biosynthesis of an Azoxyalkene Compound Produced by a Multiple Gene Disruptant ofStreptomyces rochei. Chembiochem 2015; 16:2237-43. [DOI: 10.1002/cbic.201500393] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Hirofumi Kunitake
- Department of Molecular Biotechnology; Graduate School of Advanced Sciences of Matter; Hiroshima University; 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8530 Japan
| | - Takahiro Hiramatsu
- Department of Molecular Biotechnology; Graduate School of Advanced Sciences of Matter; Hiroshima University; 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8530 Japan
| | - Haruyasu Kinashi
- Department of Molecular Biotechnology; Graduate School of Advanced Sciences of Matter; Hiroshima University; 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8530 Japan
| | - Kenji Arakawa
- Department of Molecular Biotechnology; Graduate School of Advanced Sciences of Matter; Hiroshima University; 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8530 Japan
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23
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Mori T, Hoshino S, Sahashi S, Wakimoto T, Matsui T, Morita H, Abe I. Structural Basis for β-Carboline Alkaloid Production by the Microbial Homodimeric Enzyme McbB. ACTA ACUST UNITED AC 2015; 22:898-906. [DOI: 10.1016/j.chembiol.2015.06.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 05/19/2015] [Accepted: 06/02/2015] [Indexed: 11/30/2022]
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Savi DC, Shaaban KA, Vargas N, Ponomareva LV, Possiede YM, Thorson JS, Glienke C, Rohr J. Microbispora sp. LGMB259 endophytic actinomycete isolated from Vochysia divergens (Pantanal, Brazil) producing β-carbolines and indoles with biological activity. Curr Microbiol 2014; 70:345-54. [PMID: 25385358 DOI: 10.1007/s00284-014-0724-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 09/24/2014] [Indexed: 12/19/2022]
Abstract
Endophytic actinomycetes encompass bacterial groups that are well known for the production of a diverse range of secondary metabolites. Vochysia divergens is a medicinal plant, common in the "Pantanal" region (Brazil) and was focus of many investigations, but never regarding its community of endophytic symbionts. During a screening program, an endophytic strain isolated from the V. divergens, was investigated for its potential to show biological activity. The strain was characterized as Microbispora sp. LGMB259 by spore morphology and molecular analyze using nucleotide sequence of the 16S rRNA gene. Strain LGMB259 was cultivated in R5A medium producing metabolites with significant antibacterial activity. The strain produced 4 chemically related β-carbolines, and 3 Indoles. Compound 1-vinyl-β-carboline-3-carboxylic acid displayed potent activity against the Gram-positive bacterial strains Micrococcus luteus NRRL B-2618 and Kocuria rosea B-1106, and was highly active against two human cancer cell lines, namely the prostate cancer cell line PC3 and the non-small-cell lung carcinoma cell line A549, with IC50 values of 9.45 and 24.67 µM, respectively. 1-Vinyl-β-carboline-3-carboxylic acid also showed moderate activity against the yeast Saccharomyces cerevisiae ATCC204508, as well as the phytopathogenic fungi Phyllosticta citricarpa LGMB06 and Colletotrichum gloeosporioides FDC83.
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Affiliation(s)
- Daiani C Savi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA
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A γ-butyrolactone autoregulator-receptor system involved in the regulation of auricin production in Streptomyces aureofaciens CCM 3239. Appl Microbiol Biotechnol 2014; 99:309-25. [DOI: 10.1007/s00253-014-6057-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/15/2014] [Accepted: 08/28/2014] [Indexed: 10/24/2022]
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26
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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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