1
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Mu X, Lei R, Yan S, Deng Z, Liu R, Liu T. The LysR family transcriptional regulator ORF-L16 regulates spinosad biosynthesis in Saccharopolyspora spinosa. Synth Syst Biotechnol 2024; 9:609-617. [PMID: 38784197 PMCID: PMC11108826 DOI: 10.1016/j.synbio.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/02/2024] [Accepted: 05/05/2024] [Indexed: 05/25/2024] Open
Abstract
Spinosad, a potent broad-spectrum bioinsecticide produced by Saccharopolyspora spinosa, has significant market potential. Despite its effectiveness, the regulatory mechanisms of spinosad biosynthesis remain unclear. Our investigation identified the crucial role of the LysR family transcriptional regulator ORF-L16, located upstream of spinosad biosynthetic genes, in spinosad biosynthesis. Through reverse transcription PCR (RT-PCR) and 5'-rapid amplification of cDNA ends (5'-Race), we unveiled that the spinosad biosynthetic gene cluster (BGC) contains six transcription units and seven promoters. Electrophoretic mobility shift assays (EMSAs) demonstrated that ORF-L16 bound to seven promoters within the spinosad BGC, indicating its involvement in regulating spinosad biosynthesis. Notably, deletion of ORF-L16 led to a drastic reduction in spinosad production from 1818.73 mg/L to 1.69 mg/L, accompanied by decreased transcription levels of spinosad biosynthetic genes, confirming its positive regulatory function. Additionally, isothermal titration calorimetry (ITC) and EMSA confirmed that spinosyn A, the main product of the spinosad BGC, served as an effector of ORF-L16. Specifically, it decreased the binding affinity between ORF-L16 and spinosad BGC promoters, thus exerting negative feedback regulation on spinosad biosynthesis. This research enhances our comprehension of spinosad biosynthesis regulation and lays the groundwork for future investigations on transcriptional regulators in S. spinosa.
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Affiliation(s)
- Xin Mu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, Hubei Province, China
| | - Ru Lei
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, Hubei Province, China
| | - Shuqing Yan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, Hubei Province, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, Hubei Province, China
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ran Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200030, China
- Key Laboratory of Quantitative Synthetic Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Tiangang Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, Hubei Province, China
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200030, China
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2
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Boukouvala S, Kontomina E, Olbasalis I, Patriarcheas D, Tzimotoudis D, Arvaniti K, Manolias A, Tsatiri MA, Basdani D, Zekkas S. Insights into the genomic and functional divergence of NAT gene family to serve microbial secondary metabolism. Sci Rep 2024; 14:14905. [PMID: 38942826 PMCID: PMC11213898 DOI: 10.1038/s41598-024-65342-4] [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: 01/14/2024] [Accepted: 06/19/2024] [Indexed: 06/30/2024] Open
Abstract
Microbial NAT enzymes, which employ acyl-CoA to acylate aromatic amines and hydrazines, have been well-studied for their role in xenobiotic metabolism. Some homologues have also been linked to secondary metabolism, but this function of NAT enzymes is not as well-known. For this comparative study, we surveyed sequenced microbial genomes to update the list of formally annotated NAT genes, adding over 4000 new sequences (mainly bacterial, but also archaeal, fungal and protist) and portraying a broad but not universal distribution of NATs in the microbiocosmos. Localization of NAT sequences within microbial gene clusters was not a rare finding, and this association was evident across all main types of biosynthetic gene clusters (BGCs) implicated in secondary metabolism. Interrogation of the MIBiG database for experimentally characterized clusters with NAT genes further supports that secondary metabolism must be a major function for microbial NAT enzymes and should not be overlooked by researchers in the field. We also show that NAT sequences can be associated with bacterial plasmids potentially involved in horizontal gene transfer. Combined, our computational predictions and MIBiG literature findings reveal the extraordinary functional diversification of microbial NAT genes, prompting further research into their role in predicted BGCs with as yet uncharacterized function.
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Affiliation(s)
- Sotiria Boukouvala
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece.
| | - Evanthia Kontomina
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Ioannis Olbasalis
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Dionysios Patriarcheas
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Dimosthenis Tzimotoudis
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Konstantina Arvaniti
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Aggelos Manolias
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Maria-Aggeliki Tsatiri
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Dimitra Basdani
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Sokratis Zekkas
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100, Alexandroupolis, Greece
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3
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Li Z, Li X, Xia H. Roles of LuxR-family regulators in the biosynthesis of secondary metabolites in Actinobacteria. World J Microbiol Biotechnol 2022; 38:250. [DOI: 10.1007/s11274-022-03414-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 09/11/2022] [Indexed: 10/31/2022]
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4
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Li X, Ren W, Li Y, Shi Y, Sun H, Wang L, Wu L, Xie Y, Du Y, Jiang Z, Hong B. Production of chain-extended cinnamoyl compounds by overexpressing two adjacent cluster-situated LuxR regulators in Streptomyces globisporus C-1027. Front Microbiol 2022; 13:931180. [PMID: 35992673 PMCID: PMC9381841 DOI: 10.3389/fmicb.2022.931180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 07/04/2022] [Indexed: 11/17/2022] Open
Abstract
Natural products from microorganisms are important sources for drug discovery. With the development of high-throughput sequencing technology and bioinformatics, a large amount of uncharacterized biosynthetic gene clusters (BGCs) in microorganisms have been found, which show the potential for novel natural product production. Nine BGCs containing PKS and/or NRPS in Streptomyces globisporus C-1027 were transcriptionally low/silent under the experimental fermentation conditions, and the products of these clusters are unknown. Thus, we tried to activate these BGCs to explore cryptic products of this strain. We constructed the cluster-situated regulator overexpressing strains which contained regulator gene(s) under the control of the constitutive promoter ermE*p in S. globisporus C-1027. Overexpression of regulators in cluster 26 resulted in significant transcriptional upregulation of biosynthetic genes. With the separation and identification of products from the overexpressing strain OELuxR1R2, three ortho-methyl phenyl alkenoic acids (compounds 1-3) were obtained. Gene disruption showed that compounds 1 and 2 were completely abolished in the mutant GlaEKO, but were hardly affected by deletion of the genes orf3 or echA in cluster 26. The type II PKS biosynthetic pathway of chain-extended cinnamoyl compounds was deduced by bioinformatics analysis. This study showed that overexpression of the two adjacent cluster-situated LuxR regulator(s) is an effective strategy to connect the orphan BGC to its products.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Bin Hong
- NHC Key Laboratory of Biotechnology of Antibiotics, CAMS Key Laboratory of Synthetic Biology for Drug Innovation, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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5
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Identification and Heterologous Expression of the Kendomycin B Biosynthetic Gene Cluster from Verrucosispora sp. SCSIO 07399. Mar Drugs 2021; 19:md19120673. [PMID: 34940672 PMCID: PMC8708025 DOI: 10.3390/md19120673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/16/2021] [Accepted: 11/22/2021] [Indexed: 11/17/2022] Open
Abstract
Verrucosispora sp. SCSIO 07399, a rare marine-derived actinomycete, produces a set of ansamycin-like polyketides kendomycin B–D (1–3) which possess potent antibacterial activities and moderate tumor cytotoxicity. Structurally, kendomycin B–D contain a unique aliphatic macrocyclic ansa scaffold in which the highly substituted pyran ring is connected to the quinone moiety. In this work, a type I/type III polyketide synthase (PKS) hybrid biosynthetic gene cluster coding for assembly of kendomycin B (kmy), and covering 33 open reading frames, was identified from Verrucosispora sp. SCSIO 07399. The kmy cluster was found to be essential for kendomycin B biosynthesis as verified by gene disruption and heterologous expression. Correspondingly, a biosynthetic pathway was proposed based on bioinformatics, cluster alignments, and previous research. Additionally, the role of type III PKS for generating the precursor unit 3,5-dihydroxybenzoic acid (3,5-DHBA) was demonstrated by chemical complementation, and type I PKS executed the polyketide chain elongation. The kmy cluster was found to contain a positive regulatory gene kmy4 whose regulatory effect was identified using real-time quantitative PCR (RT-qPCR). These advances shed important new insights into kendomycin B biosynthesis and help to set the foundation for further research aimed at understanding and exploiting the carbacylic ansa scaffold.
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6
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Sharma V, Kaur R, Salwan R. Streptomyces: host for refactoring of diverse bioactive secondary metabolites. 3 Biotech 2021; 11:340. [PMID: 34221811 DOI: 10.1007/s13205-021-02872-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/31/2021] [Indexed: 12/22/2022] Open
Abstract
Microbial secondary metabolites are intensively explored due to their demands in pharmaceutical, agricultural and food industries. Streptomyces are one of the largest sources of secondary metabolites having diverse applications. In particular, the abundance of secondary metabolites encoding biosynthetic gene clusters and presence of wobble position in Streptomyces strains make it potential candidate as a native or heterologous host for secondary metabolite production including several cryptic gene clusters expression. Here, we have discussed the developments in Streptomyces strains genome mining, its exploration as a suitable host and application of synthetic biology for refactoring genetic systems for developing chassis for enhanced as well as novel secondary metabolites with reduced genome and cleaned background.
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Affiliation(s)
- Vivek Sharma
- University Centre for Research and Development, Chandigarh University, Gharuan, Mohali, Punjab 140413 India
| | - Randhir Kaur
- University Centre for Research and Development, Chandigarh University, Gharuan, Mohali, Punjab 140413 India
| | - Richa Salwan
- College of Horticulture and Forestry, Dr YS Parmar University of Horticulture and Forestry, Neri, Hamirpur, Himachal Pradesh 177001 India
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7
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Xia H, Li X, Li Z, Zhan X, Mao X, Li Y. The Application of Regulatory Cascades in Streptomyces: Yield Enhancement and Metabolite Mining. Front Microbiol 2020; 11:406. [PMID: 32265866 PMCID: PMC7105598 DOI: 10.3389/fmicb.2020.00406] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 02/26/2020] [Indexed: 12/13/2022] Open
Abstract
Streptomyces is taken as an important resource for producing the most abundant antibiotics and other bio-active natural products, which have been widely used in pharmaceutical and agricultural areas. Usually they are biosynthesized through secondary metabolic pathways encoded by cluster situated genes. And these gene clusters are stringently regulated by interweaved transcriptional regulatory cascades. In the past decades, great advances have been made to elucidate the regulatory mechanisms involved in antibiotic production in Streptomyces. In this review, we summarized the recent advances on the regulatory cascades of antibiotic production in Streptomyces from the following four levels: the signals triggering the biosynthesis, the global regulators, the pathway-specific regulators and the feedback regulation. The production of antibiotic can be largely enhanced by rewiring the regulatory networks, such as overexpression of positive regulators, inactivation of repressors, fine-tuning of the feedback and ribosomal engineering in Streptomyces. The enormous amount of genomic sequencing data implies that the Streptomyces has potential to produce much more antibiotics for the great diversities and wide distributions of biosynthetic gene clusters in Streptomyces genomes. Most of these gene clusters are defined cryptic for unknown or undetectable natural products. In the synthetic biology era, activation of the cryptic gene clusters has been successfully achieved by manipulation of the regulatory genes. Chemical elicitors, rewiring regulatory gene and ribosomal engineering have been employed to crack the potential of cryptic gene clusters. These have been proposed as the most promising strategy to discover new antibiotics. For the complex of regulatory network in Streptomyces, we proposed that the discovery of new antibiotics and the optimization of industrial strains would be greatly promoted by further understanding the regulatory mechanism of antibiotic production.
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Affiliation(s)
- Haiyang Xia
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China
| | - Xiaofang Li
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China
| | - Zhangqun Li
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China
| | - Xinqiao Zhan
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China
| | - Xuming Mao
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China.,Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yongquan Li
- Institute of Biopharmaceuticals, Taizhou University, Taizhou, China.,Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, China
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8
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Kaur G, Burroughs AM, Iyer LM, Aravind L. Highly regulated, diversifying NTP-dependent biological conflict systems with implications for the emergence of multicellularity. eLife 2020; 9:e52696. [PMID: 32101166 PMCID: PMC7159879 DOI: 10.7554/elife.52696] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 02/25/2020] [Indexed: 12/12/2022] Open
Abstract
Social cellular aggregation or multicellular organization pose increased risk of transmission of infections through the system upon infection of a single cell. The generality of the evolutionary responses to this outside of Metazoa remains unclear. We report the discovery of several thematically unified, remarkable biological conflict systems preponderantly present in multicellular prokaryotes. These combine thresholding mechanisms utilizing NTPase chaperones (the MoxR-vWA couple), GTPases and proteolytic cascades with hypervariable effectors, which vary either by using a reverse transcriptase-dependent diversity-generating system or through a system of acquisition of diverse protein modules, typically in inactive form, from various cellular subsystems. Conciliant lines of evidence indicate their deployment against invasive entities, like viruses, to limit their spread in multicellular/social contexts via physical containment, dominant-negative interactions or apoptosis. These findings argue for both a similar operational 'grammar' and shared protein domains in the sensing and limiting of infections during the multiple emergences of multicellularity.
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Affiliation(s)
- Gurmeet Kaur
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of HealthBethesdaUnited States
| | - A Maxwell Burroughs
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of HealthBethesdaUnited States
| | - Lakshminarayan M Iyer
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of HealthBethesdaUnited States
| | - L Aravind
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of HealthBethesdaUnited States
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9
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Zhang Y, Chen H, Wang P, Wen J. Identification of the regulon FkbN for ascomycin biosynthesis and its interspecies conservation analysis as LAL family regulator. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Zhang L, Sun L, Yi H, Wang S, Han J, Liu N, Zhang S, Zhang L. Comparative proteome analysis of Streptomyces mobaraensis under MgCl2 stress shows proteins modulating differentiation and transglutaminase biosynthesis. Food Res Int 2019; 121:622-632. [DOI: 10.1016/j.foodres.2018.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/24/2018] [Accepted: 12/20/2018] [Indexed: 01/03/2023]
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11
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Martín JF, Ramos A, Liras P. Regulation of Geldanamycin Biosynthesis by Cluster-Situated Transcription Factors and the Master Regulator PhoP. Antibiotics (Basel) 2019; 8:antibiotics8030087. [PMID: 31262015 PMCID: PMC6784220 DOI: 10.3390/antibiotics8030087] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 06/25/2019] [Accepted: 06/29/2019] [Indexed: 11/16/2022] Open
Abstract
Geldanamycin and the closely related herbimycins A, B, and C are benzoquinone-type ansamycins with antitumoral activity. They are produced by Streptomyces hygroscopicus var. geldanus, Streptomyces lydicus and Streptomyces autolyticus among other Streptomyces strains. Geldanamycins interact with the Hsp-90 chaperone, a protein that has a key role in tumorigenesis of human cells. Geldanamycin is a polyketide antibiotic and the polyketide synthase contain seven modules organized in three geldanamycin synthases genes named gdmAI, gdmAII, and gdmAIII. The loading domain of GdmI activates AHBA, and also related hydroxybenzoic acid derivatives, forming geldanamycin analogues. Three regulatory genes, gdmRI, gdmRII, and gdmRIII were found associated with the geldanamycin gene cluster in S. hygroscopicus strains. GdmRI and GdmRII are LAL-type (large ATP binding regulators of the LuxR family) transcriptional regulators, while GdmRIII belongs to the TetR-family. All three are positive regulators of geldanamycin biosynthesis and are strictly required for expression of the geldanamycin polyketide synthases. In S. autolyticus the gdmRIII regulates geldanamycin biosynthesis and also expression of genes in the elaiophylin gene cluster, an unrelated macrodiolide antibiotic. The biosynthesis of geldanamycin is very sensitive to the inorganic phosphate concentration in the medium. This regulation is exerted through the two components system PhoR-PhoP. The phoRP genes of S. hygroscopicus are linked to phoU encoding a transcriptional modulator. The phoP gene was deleted in S. hygroscopicus var geldanus and the mutant was unable to grow in SPG medium unless supplemented with 5 mM phosphate. Also, the S. hygroscopicus pstS gene involved in the high affinity phosphate transport was cloned, and PhoP binding sequences (PHO boxes), were found upstream of phoU, phoRP, and pstS; the phoRP-phoU sequences were confirmed by EMSA and nuclease footprinting protection assays. The PhoP binding sequence consists of 11 nucleotide direct repeat units that are similar to those found in S. coelicolor Streptomyces avermitilis and other Streptomyces species. The available genetic information provides interesting tools for modification of the biosynthetic and regulatory mechanisms in order to increase geldanamycin production and to obtain new geldanamycin analogues with better antitumor properties.
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Affiliation(s)
- Juan F Martín
- Area de Microbiología, Departmento de Biología Molecular, Universidad de León, 24071 León, Spain.
| | - Angelina Ramos
- Instituto de Biotecnología (INBIOTEC). Av. Real 1, 24006 León, Spain
| | - Paloma Liras
- Area de Microbiología, Departmento de Biología Molecular, Universidad de León, 24071 León, Spain
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Xu J, Song Z, Xu X, Ma Z, Bechthold A, Yu X. ToyA, a positive pathway-specific regulator for toyocamycin biosynthesis in Streptomyces diastatochromogenes 1628. Appl Microbiol Biotechnol 2019; 103:7071-7084. [DOI: 10.1007/s00253-019-09959-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/29/2019] [Accepted: 06/01/2019] [Indexed: 12/11/2022]
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Acharya D, Miller I, Cui Y, Braun DR, Berres ME, Styles MJ, Li L, Kwan J, Rajski SR, Blackwell HE, Bugni TS. Omics Technologies to Understand Activation of a Biosynthetic Gene Cluster in Micromonospora sp. WMMB235: Deciphering Keyicin Biosynthesis. ACS Chem Biol 2019; 14:1260-1270. [PMID: 31120241 PMCID: PMC6591704 DOI: 10.1021/acschembio.9b00223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
![]()
DNA
sequencing of a large collection of bacterial genomes reveals
a wealth of orphan biosynthetic gene clusters (BGCs) with no identifiable
products. BGC silencing, for those orphan clusters that are truly
silent, rather than those whose products have simply evaded detection
and cluster correlation, is postulated to result from transcriptional
inactivation of these clusters under standard laboratory conditions.
Here, we employ a multi-omics approach to demonstrate how interspecies
interactions modulate the keyicin producing kyc cluster
at the transcriptome level in cocultures of kyc-bearing Micromonospora sp. and a Rhodococcus sp.
We further correlate coculture dependent changes in keyicin production
to changes in transcriptomic and proteomic profiles and show that
these changes are attributable to small molecule signaling consistent
with a quorum sensing pathway. In piecing together the various elements
underlying keyicin production in coculture, this study highlights
how omics technologies can expedite future efforts to understand and
exploit silent BGCs.
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Affiliation(s)
- Deepa Acharya
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Ian Miller
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Yusi Cui
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Doug R. Braun
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Mark E. Berres
- Bioinformatics Resource Center, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Matthew J. Styles
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Lingjun Li
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Jason Kwan
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Scott R. Rajski
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Helen E. Blackwell
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Tim S. Bugni
- Pharmaceutical Sciences Division, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
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14
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Fidan O, Yan R, Zhu D, Zhan J. Improved production of antifungal angucycline Sch47554 by manipulating three regulatory genes inStreptomycessp. SCC‐2136. Biotechnol Appl Biochem 2019; 66:517-526. [DOI: 10.1002/bab.1748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 03/27/2019] [Indexed: 01/27/2023]
Affiliation(s)
- Ozkan Fidan
- Department of Biological EngineeringUtah State University Logan UT USA
| | - Riming Yan
- Department of Biological EngineeringUtah State University Logan UT USA
- Key Laboratory of Protection and Utilization of Subtropic PlantResources of Jiangxi ProvinceCollege of Life ScienceJiangxi Normal University Jiangxi People's Republic of China
| | - Du Zhu
- Key Laboratory of Protection and Utilization of Subtropic PlantResources of Jiangxi ProvinceCollege of Life ScienceJiangxi Normal University Jiangxi People's Republic of China
| | - Jixun Zhan
- Department of Biological EngineeringUtah State University Logan UT USA
- TCM and Ethnomedicine Innovation & Development LaboratorySchool of PharmacyHunan University of Chinese Medicine Changsha Hunan People's Republic of China
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15
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Shen J, Kong L, Li Y, Zheng X, Wang Q, Yang W, Deng Z, You D. A LuxR family transcriptional regulator AniF promotes the production of anisomycin and its derivatives in Streptomyces hygrospinosus var. beijingensis. Synth Syst Biotechnol 2019; 4:40-48. [PMID: 30656223 PMCID: PMC6321866 DOI: 10.1016/j.synbio.2018.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 12/26/2018] [Accepted: 12/29/2018] [Indexed: 11/04/2022] Open
Abstract
The protein synthesis inhibitor anisomycin features a unique benzylpyrrolidine system and exhibits potent selective activity against pathogenic protozoa and fungi. It is one of the important effective components in Agricultural Antibiotic120, which has been widely used as naturally-originated agents for treatment of crop decay in China. The chemical synthesis of anisomycin has recently been reported, but the complex process with low productivity made the biosynthesis still to be a vital mainstay in efforts. The biosynthetic gene cluster (BGC) of anisomycin in Streptomyces hygrospinosus var. beijingensis has been identified in our previous work, while poor understanding of the regulatory mechanism limited the yield enhancement via regulation engineering of S. hygrospinosus var. beijingensis. In this study here, we characterized AniF as an indispensable LuxR family transcriptional regulator for the activation of anisomycin biosynthesis. The genetic manipulations of aniF and the real-time quantitative PCR (RT-qPCR) revealed that it positively regulated the transcription of the anisomycin BGC. Moreover, the overexpression of aniF contributed to the improvement of the production of anisomycin and its derivatives. Dissection of the mechanism underlying the function of AniF revealed that it directly activated the transcription of the genes aniR-G involved in anisomycin biosynthesis. Especially, one AniF-binding site in the promoter region of aniR was identified by DNase I footprinting assay and an inverted repeat sequence (5′-GGGC-3′) composed of two 4-nt half sites in the protected region was found. Taken together, our systematic study confirmed the positive regulatory role of AniF and might facilitate the future construction of engineering strains with high productivity of anisomycin and its derivatives.
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Affiliation(s)
- Jufang Shen
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Lingxin Kong
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Li
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoqing Zheng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China.,Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qing Wang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Weinan Yang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Zixin Deng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Delin You
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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16
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Li Z, Zhu D, Shen Y. Discovery of novel bioactive natural products driven by genome mining. Drug Discov Ther 2018; 12:318-328. [DOI: 10.5582/ddt.2018.01066] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Zhongyue Li
- Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University
| | - Deyu Zhu
- School of Basic Medical Sciences, Shandong University
| | - Yuemao Shen
- Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University
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17
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Streptomyces: implications and interactions in plant growth promotion. Appl Microbiol Biotechnol 2018; 103:1179-1188. [PMID: 30594952 PMCID: PMC6394478 DOI: 10.1007/s00253-018-09577-y] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 12/25/2022]
Abstract
With the impending increase of the world population by 2050, more activities have been directed toward the improvement of crop yield and a safe environment. The need for chemical-free agricultural practices is becoming eminent due to the effects of these chemicals on the environment and human health. Actinomycetes constitute a significant percentage of the soil microbial community. The Streptomyces genus, which is the most abundant and arguably the most important actinomycetes, is a good source of bioactive compounds, antibiotics, and extracellular enzymes. These genera have shown over time great potential in improving the future of agriculture. This review highlights and buttresses the agricultural importance of Streptomyces through its biocontrol and plant growth-promoting activities. These activities are highlighted and discussed in this review. Some biocontrol products from this genus are already being marketed while work is still ongoing on this productive genus. Compared to more focus on its biocontrol ability, less work has been done on it as a biofertilizer until recently. This genus is as efficient as a biofertilizer as it is as a biocontrol.
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18
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Liu B, Ge B, Ma J, Wei Q, Khan AA, Shi L, Zhang K. Identification of wysPII as an Activator of Morphological Development in Streptomyces albulus CK-15. Front Microbiol 2018; 9:2550. [PMID: 30405594 PMCID: PMC6207912 DOI: 10.3389/fmicb.2018.02550] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/05/2018] [Indexed: 11/13/2022] Open
Abstract
Wuyiencin is produced by Streptomyces albulus var. wuyiensis and used widely in agriculture to control a variety of fungal diseases, such as cucumber downy mildew, strawberry powdery mildew, and tomato gray mold. As an industrially-produced biopesticide, reducing production costs is very important for popularization of this approach. To obtain a rapidly growing strain that effectively shortens the fermentation time, we investigated the effects of knockout and overexpression of the wysPII gene, a member of the LuxR regulatory gene family, in S. albulus strain CK-15. The ΔwysPII mutant exhibited a reduced rate of growth and sporulation. The time taken to reach the greatest mycelial biomass was approximately 18 h shorter in the ooPII (wysPII overexpressing) strain compared with that of the wild-type (WT) strain. In addition, the time to reach the greatest wuyiencin production was 56 h in the ooPII strain compared with 62 h in the WT strain. Furthermore, wysPII was shown to act as an activator of morphological development without affecting wuyiencin production. Thus, the ooPII strain can be used to reduce costs and increase efficiency in industrial fermentation processes for wuyiencin production.
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Affiliation(s)
- Binghua Liu
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Beibei Ge
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jinjin Ma
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qiuhe Wei
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Abid Ali Khan
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.,Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar, Pakistan
| | - Liming Shi
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kecheng Zhang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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19
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Ordóñez-Robles M, Santos-Beneit F, Martín JF. Unraveling Nutritional Regulation of Tacrolimus Biosynthesis in Streptomyces tsukubaensis through omic Approaches. Antibiotics (Basel) 2018; 7:antibiotics7020039. [PMID: 29724001 PMCID: PMC6022917 DOI: 10.3390/antibiotics7020039] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 12/21/2022] Open
Abstract
Streptomyces tsukubaensis stands out among actinomycetes by its ability to produce the immunosuppressant tacrolimus. Discovered about 30 years ago, this macrolide is widely used as immunosuppressant in current clinics. Other potential applications for the treatment of cancer and as neuroprotective agent have been proposed in the last years. In this review we introduce the discovery of S. tsukubaensis and tacrolimus, its biosynthetic pathway and gene cluster (fkb) regulation. We have focused this work on the omic studies performed in this species in order to understand tacrolimus production. Transcriptomics, proteomics and metabolomics have improved our knowledge about the fkb transcriptional regulation and have given important clues about nutritional regulation of tacrolimus production that can be applied to improve production yields. Finally, we address some points of S. tsukubaensis biology that deserve more attention.
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Affiliation(s)
- María Ordóñez-Robles
- Área de Microbiología, Departamento de Biología Molecular, Universidad de León, León 24071, Spain.
- Instituto de Biotecnología de León, INBIOTEC, Avda. Real no. 1, León 24006, Spain.
| | - Fernando Santos-Beneit
- Instituto de Biotecnología de León, INBIOTEC, Avda. Real no. 1, León 24006, Spain.
- Departamento de Biología Funcional, Universidad de Oviedo, Oviedo 33006, Spain.
| | - Juan F Martín
- Área de Microbiología, Departamento de Biología Molecular, Universidad de León, León 24071, Spain.
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20
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Tu J, Li S, Chen J, Song Y, Fu S, Ju J, Li Q. Characterization and heterologous expression of the neoabyssomicin/abyssomicin biosynthetic gene cluster from Streptomyces koyangensis SCSIO 5802. Microb Cell Fact 2018; 17:28. [PMID: 29463238 PMCID: PMC5819245 DOI: 10.1186/s12934-018-0875-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/09/2018] [Indexed: 11/10/2022] Open
Abstract
Background The deep-sea-derived microbe Streptomyces koyangensis SCSIO 5802 produces neoabyssomicins A–B (1–2) and abyssomicins 2 (3) and 4 (4). Neoabyssomicin A (1) augments human immunodeficiency virus-1 (HIV-1) replication whereas abyssomicin 2 (3) selectively reactivates latent HIV and is also active against Gram-positive pathogens including methicillin-resistant Staphylococcus aureus (MRSA). Structurally, neoabyssomicins A–B constitute a new subtype within the abyssomicin family and feature unique structural traits characteristic of extremely interesting biosynthetic transformations. Results In this work, the biosynthetic gene cluster (BGC) for the neoabyssomicins and abyssomicins, composed of 28 opening reading frames, was identified in S. koyangensis SCSIO 5802, and its role in neoabyssomicin/abyssomicin biosynthesis was confirmed via gene inactivation and heterologous expression experiments. Bioinformatics and genomics analyses enabled us to propose a biosynthetic pathway for neoabyssomicin/abyssomicin biosynthesis. Similarly, a protective export system by which both types of compounds are secreted from the S. koyangensis producer was identified, as was a four-component ABC transporter-based import system central to neoabyssomicin/abyssomicin biosynthesis. Furthermore, two regulatory genes, abmI and abmH, were unambiguously shown to be positive regulators of neoabyssomicin/abyssomicin biosynthesis. Consistent with their roles as positive regulatory genes, the overexpression of abmI and abmH (independent of each other) was shown to improve neoabyssomicin/abyssomicin titers. Conclusions These studies provide new insight into the biosynthesis of the abyssomicin class of natural products, and highlight important exploitable features of its BGC for future efforts. Elucidation of the neoabyssomicin/abyssomicin BGC now enables combinatorial biosynthetic initiatives aimed at improving both the titers and pharmaceutical properties of these important natural products-based drug leads. Electronic supplementary material The online version of this article (10.1186/s12934-018-0875-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jiajia Tu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.,School of Pharmacy, Zunyi Medical University, 201 Dalian Road, Zunyi, 563000, China
| | - Siting Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.,College of Bio and Marine Sciences, Shenzhen University, 3688 Nanhai Ave, Shenzhen, 518060, China
| | - Jiang Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 110039, China
| | - Yongxiang Song
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
| | - Shaobin Fu
- School of Pharmacy, Zunyi Medical University, 201 Dalian Road, Zunyi, 563000, China
| | - Jianhua Ju
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 110039, China
| | - Qinglian Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.
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21
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Jiang M, Yin M, Wu S, Han X, Ji K, Wen M, Lu T. GdmRIII, a TetR Family Transcriptional Regulator, Controls Geldanamycin and Elaiophylin Biosynthesis in Streptomyces autolyticus CGMCC0516. Sci Rep 2017; 7:4803. [PMID: 28684749 PMCID: PMC5500506 DOI: 10.1038/s41598-017-05073-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 05/24/2017] [Indexed: 11/13/2022] Open
Abstract
Geldanamycin and elaiophylin are co-produced in several Streptomyces strains. However, the regulation of their biosynthesis is not fully understood yet. Herein the function of a TetR family regulator GdmRIII, which is located in the biosynthetic gene cluster of geldanamycin, was studied to understand the regulatory mechanism of geldanamycin biosynthesis in Streptomyces autolyticus CGMCC0516. The production of geldanamycin decreased substantially in a ΔgdmRIII mutant and the yield of three compounds which were thought to be geldanamycin congeners greatly increased. Surprisingly, the structural elucidation of these compounds showed that they were elaiophylin and its analogues, which implied that GdmRIII not only played a positive regulatory role in the biosynthesis of geldanamycin, but also played a negative role in elaiophylin biosynthesis. GdmRIII affected the expression of multiple genes in both gene clusters, and directly regulated the expression of gdmM, gdmN, and elaF by binding to the promoter regions of these three genes. A conserved non-palindromic sequence was found among the binding sites of elaF. Our findings suggested that the biosynthetic pathways of geldanamycin and elaiophylin were connected through GdmRIII, which might provide a way for Streptomyces to coordinate the biosynthesis of these compounds for better adapting to environment changes.
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Affiliation(s)
- MingXing Jiang
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - Min Yin
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - ShaoHua Wu
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - XiuLin Han
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - KaiYan Ji
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - MengLiang Wen
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China.
| | - Tao Lu
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China.
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22
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The complete genome sequence of Streptomyces autolyticus CGMCC 0516, the producer of geldanamycin, autolytimycin, reblastatin and elaiophylin. J Biotechnol 2017; 252:27-31. [DOI: 10.1016/j.jbiotec.2017.04.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 04/29/2017] [Accepted: 04/29/2017] [Indexed: 12/23/2022]
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23
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RifZ (AMED_0655) Is a Pathway-Specific Regulator for Rifamycin Biosynthesis in Amycolatopsis mediterranei. Appl Environ Microbiol 2017; 83:AEM.03201-16. [PMID: 28159794 DOI: 10.1128/aem.03201-16] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/26/2017] [Indexed: 11/20/2022] Open
Abstract
Rifamycin and its derivatives are particularly effective against the pathogenic mycobacteria Mycobacterium tuberculosis and Mycobacterium leprae Although the biosynthetic pathway of rifamycin has been extensively studied in Amycolatopsis mediterranei, little is known about the regulation in rifamycin biosynthesis. Here, an in vivo transposon system was employed to identify genes involved in the regulation of rifamycin production in A. mediterranei U32. In total, nine rifamycin-deficient mutants were isolated, among which three mutants had the transposon inserted in AMED_0655 (rifZ, encoding a LuxR family regulator). The rifZ gene was further knocked out via homologous recombination, and the transcription of genes in the rifamycin biosynthetic gene cluster (rif cluster) was remarkably reduced in the rifZ null mutant. Based on the cotranscription assay results, genes within the rif cluster were grouped into 10 operons, sharing six promoter regions. By use of electrophoretic mobility shift assay and DNase I footprinting assay, RifZ was proved to specially bind to all six promoter regions, which was consistent with the fact that RifZ regulated the transcription of the whole rif cluster. The binding consensus sequence was further characterized through alignment using the RifZ-protected DNA sequences. By use of bionformatic analysis, another five promoters containing the RifZ box (CTACC-N8-GGATG) were identified, among which the binding of RifZ to the promoter regions of both rifK and orf18 (AMED_0645) was further verified. As RifZ directly regulates the transcription of all operons within the rif cluster, we propose that RifZ is a pathway-specific regulator for the rif cluster.IMPORTANCE To this day, rifamycin and its derivatives are still the first-line antituberculosis drugs. The biosynthesis of rifamycin has been extensively studied, and most biosynthetic processes have been characterized. However, little is known about the regulation of the transcription of the rifamycin biosynthetic gene cluster (rif cluster), and no regulator has been characterized. Through the employment of transposon screening, we here characterized a LuxR family regulator, RifZ, as a direct transcriptional activator for the rif cluster. As RifZ directly regulates the transcription of the entire rif cluster, it is considered a pathway-specific regulator for rifamycin biosynthesis. Therefore, as the first regulator characterized for direct regulation of rif cluster transcription, RifZ may provide a new clue for further engineering of high-yield industrial strains.
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24
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Baksh A, Kepplinger B, Isah HA, Probert MR, Clegg W, Wills C, Goodfellow M, Errington J, Allenby N, Hall MJ. Production of 17-O-demethyl-geldanamycin, a cytotoxic ansamycin polyketide, by Streptomyces hygroscopicus DEM20745. Nat Prod Res 2016; 31:1895-1900. [PMID: 27966376 DOI: 10.1080/14786419.2016.1263854] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The actinomycete DEM20745, collected from non-rhizosphere soil adjacent to Paraserianthes falactaria trees (Cangkringan, Indonesia), is an efficient producer of the anticancer ansamycin polyketide 17-O-demethyl-geldanamycin (17-O-DMG), a biosynthetic precursor of the Hsp90 inhibitor geldanamycin (GDM). In DEM20745, 17-O-DMG is the major ansamycin product observed reaching a maximum titre of 17 mg/L in the fermentation broth. 17-O-DMG has the potential to be a key starting material for the semi-synthesis of GDM analogues for use in anticancer therapy. Thus, this preferential biosynthesis of 17-O-DMG facilitates easy access to this important molecule and provides further insight in the biosynthesis of the geldanamycins.
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Affiliation(s)
- Aron Baksh
- a Faculty of Medical Sciences , Demuris Limited, Newcastle Biomedicine Bio-Incubators , Newcastle upon Tyne , UK
| | - Bernhard Kepplinger
- a Faculty of Medical Sciences , Demuris Limited, Newcastle Biomedicine Bio-Incubators , Newcastle upon Tyne , UK.,b Industrial Doctorate Centre: Biopharmaceutical Process Development , Newcastle University , Newcastle upon Tyne , UK
| | - Hadiza A Isah
- c School of Chemistry , Newcastle University , Newcastle upon Tyne , UK
| | - Michael R Probert
- c School of Chemistry , Newcastle University , Newcastle upon Tyne , UK
| | - William Clegg
- c School of Chemistry , Newcastle University , Newcastle upon Tyne , UK
| | - Corinne Wills
- c School of Chemistry , Newcastle University , Newcastle upon Tyne , UK
| | | | - Jeff Errington
- e Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Medical School , Newcastle University , Newcastle upon Tyne , UK
| | - Nick Allenby
- a Faculty of Medical Sciences , Demuris Limited, Newcastle Biomedicine Bio-Incubators , Newcastle upon Tyne , UK
| | - Michael J Hall
- c School of Chemistry , Newcastle University , Newcastle upon Tyne , UK
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25
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Zhu Z, Li H, Yu P, Guo Y, Luo S, Chen Z, Mao X, Guan W, Li Y. SlnR is a positive pathway-specific regulator for salinomycin biosynthesis in Streptomyces albus. Appl Microbiol Biotechnol 2016; 101:1547-1557. [DOI: 10.1007/s00253-016-7918-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/23/2016] [Accepted: 10/04/2016] [Indexed: 01/15/2023]
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26
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Cui H, Ni X, Liu S, Wang J, Sun Z, Ren J, Su J, Chen G, Xia H. Characterization of three positive regulators for tetramycin biosynthesis in Streptomyces ahygroscopicus. FEMS Microbiol Lett 2016; 363:fnw109. [PMID: 27190158 DOI: 10.1093/femsle/fnw109] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2016] [Indexed: 12/20/2022] Open
Abstract
Three putative regulatory genes, namely ttmRI, ttmRII and ttmRIII, which are present in the tetramycin (ttm) biosynthetic gene cluster, were found in Streptomyces ahygroscopicus Disruption of ttmRI, ttmRII or ttmRIII reduced tetramycin production, and their complementation restored production to varying degrees. Gene expression analysis of the wild-type (WT) and mutant strains through reverse transcriptase-polymerase chain reaction (RT-PCR) of the ttm gene cluster showed that the expression levels of most of the biosynthetic genes were reduced in ΔttmRI, ΔttmRII and ΔttmRIII Electrophoretic mobility shift assays demonstrated that TtmRI, TtmRII and TtmRIII bound the promoters of several genes in the ttm gene cluster. This study found that these three proteins are a group of positive regulators that activate the transcription of the ttm gene cluster in S. ahygroscopicus In addition, ΔttmRII had a reduced degree of grey pigmentation. Thus, TtmRII has a pleiotropic regulatory function in the tetramycin biosynthetic pathway and in development.
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Affiliation(s)
- Hao Cui
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Xianpu Ni
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Shoujia Liu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Jin Wang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Zhenpeng Sun
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Jun Ren
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Jiaqi Su
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Guang Chen
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
| | - Huanzhang Xia
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenhe District, Wenhua Road 103, Shenyang, Liaoning 110016, PR China
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27
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Vaughn VL, Gross DC. Characterization of salA, syrF, and syrG Genes and Attendant Regulatory Networks Involved in Plant Pathogenesis by Pseudomonas syringae pv. syringae B728a. PLoS One 2016; 11:e0150234. [PMID: 26954255 PMCID: PMC4783005 DOI: 10.1371/journal.pone.0150234] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/10/2016] [Indexed: 01/06/2023] Open
Abstract
Pseudomonas syringae pv. syringae B728a, causal agent of brown spot on bean, is an economically important plant pathogen that utilizes extracellular signaling to initiate a lifestyle change from an epiphyte to a pathogen. LuxR regulatory proteins play an important role in the transcriptional regulation of a variety of biological processes involving two-component signaling, quorum sensing, and secondary metabolism. Analysis of the B728a genome identified 24 LuxR-like proteins, three of which are encoded by salA, syrF, and syrG located adjacent to the syringomycin gene cluster. The LuxR-like proteins encoded by these three genes exhibit a domain architecture that places them in a subfamily of LuxR-like proteins associated with regulation of secondary metabolism in B728a. Deletion mutants of salA, syrF, and syrG failed to produce syringomycin and displayed reduction of virulence on bean. The transcriptional start sites of salA, syrG, and syrF were located 63, 235, and 498 bp upstream of the start codons, respectively, using primer extension analysis. The predicted -10/-35 promoter regions of syrF and syrG were confirmed using site-directed mutagenesis and GFP reporters that showed conserved promoter sequences around the -35 promoter region. Overexpression analysis and GFP reporters identified SyrG as an upstream transcriptional activator of syrF, where both SyrG and SyrF activate promoters of syringomycin biosynthesis genes. This study shows that syrG and syrF encode important transcriptional regulators of syringomycin biosynthesis genes.
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Affiliation(s)
- Vanessa L Vaughn
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas, United States of America
| | - Dennis C Gross
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas, United States of America
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28
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Zarins-Tutt JS, Barberi TT, Gao H, Mearns-Spragg A, Zhang L, Newman DJ, Goss RJM. Prospecting for new bacterial metabolites: a glossary of approaches for inducing, activating and upregulating the biosynthesis of bacterial cryptic or silent natural products. Nat Prod Rep 2016; 33:54-72. [DOI: 10.1039/c5np00111k] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Over the centuries, microbial secondary metabolites have played a central role in the treatment of human diseases and have revolutionised the pharmaceutical industry.
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Affiliation(s)
| | | | - Hong Gao
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
| | | | - Lixin Zhang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology
- Institute of Microbiology
- Chinese Academy of Sciences
- Beijing
- China
| | - David J. Newman
- Frederick National Laboratories for Cancer Research
- Natural Products Branch
- Frederick
- USA
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29
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Romero-Rodríguez A, Robledo-Casados I, Sánchez S. An overview on transcriptional regulators in Streptomyces. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2015; 1849:1017-39. [PMID: 26093238 DOI: 10.1016/j.bbagrm.2015.06.007] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/09/2015] [Accepted: 06/12/2015] [Indexed: 12/19/2022]
Abstract
Streptomyces are Gram-positive microorganisms able to adapt and respond to different environmental conditions. It is the largest genus of Actinobacteria comprising over 900 species. During their lifetime, these microorganisms are able to differentiate, produce aerial mycelia and secondary metabolites. All of these processes are controlled by subtle and precise regulatory systems. Regulation at the transcriptional initiation level is probably the most common for metabolic adaptation in bacteria. In this mechanism, the major players are proteins named transcription factors (TFs), capable of binding DNA in order to repress or activate the transcription of specific genes. Some of the TFs exert their action just like activators or repressors, whereas others can function in both manners, depending on the target promoter. Generally, TFs achieve their effects by using one- or two-component systems, linking a specific type of environmental stimulus to a transcriptional response. After DNA sequencing, many streptomycetes have been found to have chromosomes ranging between 6 and 12Mb in size, with high GC content (around 70%). They encode for approximately 7000 to 10,000 genes, 50 to 100 pseudogenes and a large set (around 12% of the total chromosome) of regulatory genes, organized in networks, controlling gene expression in these bacteria. Among the sequenced streptomycetes reported up to now, the number of transcription factors ranges from 471 to 1101. Among these, 315 to 691 correspond to transcriptional regulators and 31 to 76 are sigma factors. The aim of this work is to give a state of the art overview on transcription factors in the genus Streptomyces.
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Affiliation(s)
- Alba Romero-Rodríguez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México, D.F. 04510, Mexico
| | - Ivonne Robledo-Casados
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México, D.F. 04510, Mexico
| | - Sergio Sánchez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México, D.F. 04510, Mexico.
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Two Master Switch Regulators Trigger A40926 Biosynthesis in Nonomuraea sp. Strain ATCC 39727. J Bacteriol 2015; 197:2536-44. [PMID: 25986904 DOI: 10.1128/jb.00262-15] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 05/13/2015] [Indexed: 01/27/2023] Open
Abstract
UNLABELLED The actinomycete Nonomuraea sp. strain ATCC 39727 produces the glycopeptide A40926, the precursor of dalbavancin. Biosynthesis of A40926 is encoded by the dbv gene cluster, which contains 37 protein-coding sequences that participate in antibiotic biosynthesis, regulation, immunity, and export. In addition to the positive regulatory protein Dbv4, the A40926-biosynthetic gene cluster encodes two additional putative regulators, Dbv3 and Dbv6. Independent mutations in these genes, combined with bioassays and liquid chromatography-mass spectrometry (LC-MS) analyses, demonstrated that Dbv3 and Dbv4 are both required for antibiotic production, while inactivation of dbv6 had no effect. In addition, overexpression of dbv3 led to higher levels of A40926 production. Transcriptional and quantitative reverse transcription (RT)-PCR analyses showed that Dbv4 is essential for the transcription of two operons, dbv14-dbv8 and dbv30-dbv35, while Dbv3 positively controls the expression of four monocistronic transcription units (dbv4, dbv29, dbv36, and dbv37) and of six operons (dbv2-dbv1, dbv14-dbv8, dbv17-dbv15, dbv21-dbv20, dbv24-dbv28, and dbv30-dbv35). We propose a complex and coordinated model of regulation in which Dbv3 directly or indirectly activates transcription of dbv4 and controls biosynthesis of 4-hydroxyphenylglycine and the heptapeptide backbone, A40926 export, and some tailoring reactions (mannosylation and hexose oxidation), while Dbv4 directly regulates biosynthesis of 3,5-dihydroxyphenylglycine and other tailoring reactions, including the four cross-links, halogenation, glycosylation, and acylation. IMPORTANCE This report expands knowledge of the regulatory mechanisms used to control the biosynthesis of the glycopeptide antibiotic A40926 in the actinomycete Nonomuraea sp. strain ATCC 39727. A40926 is the precursor of dalbavancin, approved for treatment of skin infections by Gram-positive bacteria. Therefore, understanding the regulation of its biosynthesis is also of industrial importance. So far, the regulatory mechanisms used to control two other similar glycopeptides (balhimycin and teicoplanin) have been elucidated, and beyond a common step, different clusters seem to have devised different strategies to control glycopeptide production. Thus, our work provides one more example of the pitfalls of deducing regulatory roles from bioinformatic analyses only, even when analyzing gene clusters directing the synthesis of structurally related compounds.
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Li SR, Zhao GS, Sun MW, He HG, Wang HX, Li YY, Lu CH, Shen YM. Identification and characterization of the biosynthetic gene cluster of divergolides from Streptomyces sp. W112. Gene 2014; 544:93-9. [DOI: 10.1016/j.gene.2014.04.052] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/19/2014] [Accepted: 04/23/2014] [Indexed: 01/01/2023]
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Pan W, Kang Q, Wang L, Bai L, Deng Z. Asm8, a specific LAL-type activator of 3-amino-5-hydroxybenzoate biosynthesis in ansamitocin production. SCIENCE CHINA-LIFE SCIENCES 2013; 56:601-8. [PMID: 23832249 DOI: 10.1007/s11427-013-4502-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 05/28/2013] [Indexed: 11/25/2022]
Abstract
The highly potent antitumor agent ansamitocin P3 is a macrolactam isolated from Actinosynnema pretiosum ATCC 31565. A 120-kb DNA fragment was previously identified as the ansamitocin biosynthetic gene cluster, and contains genes for polyketide assembly, precursor synthesis, post-polyketide synthesis modification, and regulation. Within the biosynthetic gene cluster, asm8 encodes an 1117-amino-acid protein with a high degree of similarity to the large ATP-binding LuxR family-type regulators. In the current study, we determined that inactivation of asm8 by gene replacement in ATCC 31565 resulted in the complete loss of ansamitocin production, and that complementation with a cloned asm8 gene restored ansamitocin biosynthesis. Interestingly, the disruption of asm8 decreased the transcription of genes responsible for 3-amino-5-hydroxybenzoate (AHBA) formation, the starter unit required for ansamitocin biosynthesis. Subsequently, feeding of exogenous AHBA to the asm8 mutant restored ansamitocin biosynthesis, which showed that Asm8 is a specific positive regulator in AHBA biosynthesis. In addition, investigation of asm8 homologs identified two new ansamitocin producers, and inactivation of the asm8 homolog in A. pretiosum ATCC 31280 abolished ansamitocin production in this strain. Characterization of the positive regulator Asm8 and discovery of the two new ansamitocin producers paves the way for further improving production of this important antitumor agent.
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Affiliation(s)
- Wenqin Pan
- State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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Kong D, Lee MJ, Lin S, Kim ES. Biosynthesis and pathway engineering of antifungal polyene macrolides in actinomycetes. ACTA ACUST UNITED AC 2013; 40:529-43. [DOI: 10.1007/s10295-013-1258-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 03/04/2013] [Indexed: 11/27/2022]
Abstract
Abstract
Polyene macrolides are a large family of natural products typically produced by soil actinomycetes. Polyene macrolides are usually biosynthesized by modular and large type I polyketide synthases (PKSs), followed by several steps of sequential post-PKS modifications such as region-specific oxidations and glycosylations. Although known as powerful antibiotics containing potent antifungal activities (along with additional activities against parasites, enveloped viruses and prion diseases), their high toxicity toward mammalian cells and poor distribution in tissues have led to the continuous identification and structural modification of polyene macrolides to expand their general uses. Advances in in-depth investigations of the biosynthetic mechanism of polyene macrolides and the genetic manipulations of the polyene biosynthetic pathways provide great opportunities to generate new analogues. Recently, a novel class of polyene antibiotics was discovered (a disaccharide-containing NPP) that displays better pharmacological properties such as improved water-solubility and reduced hemolysis. In this review, we summarize the recent advances in the biosynthesis, pathway engineering, and regulation of polyene antibiotics in actinomycetes.
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Affiliation(s)
- Dekun Kong
- grid.16821.3c 0000000403688293 State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology Shanghai Jiao Tong University 200240 Shanghai P. R. China
| | - Mi-Jin Lee
- grid.202119.9 0000000123648385 Department of Biological Engineering Inha University 402-751 Incheon Korea
| | - Shuangjun Lin
- grid.16821.3c 0000000403688293 State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology Shanghai Jiao Tong University 200240 Shanghai P. R. China
| | - Eung-Soo Kim
- grid.202119.9 0000000123648385 Department of Biological Engineering Inha University 402-751 Incheon Korea
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Shen Y, Huang H, Zhu L, Luo M, Chen D. A regulatory gene (ECO-orf4) required for ECO-0501 biosynthesis inAmycolatopsis orientalis. J Basic Microbiol 2013; 54:104-10. [DOI: 10.1002/jobm.201200314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 09/10/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Yang Shen
- School of Biotechnology; East China University of Science and Technology; Shanghai China
| | - He Huang
- Key Laboratory of Synthetic Biology; Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; Shanghai China
| | - Li Zhu
- Key Laboratory of Synthetic Biology; Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; Shanghai China
- School of Pharmacy; Shanghai Jiaotong University; Shanghai China
| | - Minyu Luo
- School of Pharmacy; Shanghai Jiaotong University; Shanghai China
| | - Daijie Chen
- School of Biotechnology; East China University of Science and Technology; Shanghai China
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Goranovič D, Blažič M, Magdevska V, Horvat J, Kuščer E, Polak T, Santos-Aberturas J, Martínez-Castro M, Barreiro C, Mrak P, Kopitar G, Kosec G, Fujs S, Martín JF, Petković H. FK506 biosynthesis is regulated by two positive regulatory elements in Streptomyces tsukubaensis. BMC Microbiol 2012; 12:238. [PMID: 23083511 PMCID: PMC3551636 DOI: 10.1186/1471-2180-12-238] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 10/03/2012] [Indexed: 12/14/2022] Open
Abstract
Background FK506 (Tacrolimus) is an important immunosuppressant, produced by industrial biosynthetic processes using various Streptomyces species. Considering the complex structure of FK506, it is reasonable to expect complex regulatory networks controlling its biosynthesis. Regulatory elements, present in gene clusters can have a profound influence on the final yield of target product and can play an important role in development of industrial bioprocesses. Results Three putative regulatory elements, namely fkbR, belonging to the LysR-type family, fkbN, a large ATP-binding regulator of the LuxR family (LAL-type) and allN, a homologue of AsnC family regulatory proteins, were identified in the FK506 gene cluster from Streptomyces tsukubaensis NRRL 18488, a progenitor of industrial strains used for production of FK506. Inactivation of fkbN caused a complete disruption of FK506 biosynthesis, while inactivation of fkbR resulted in about 80% reduction of FK506 yield. No functional role in the regulation of the FK506 gene cluster has been observed for the allN gene. Using RT-PCR and a reporter system based on a chalcone synthase rppA, we demonstrated, that in the wild type as well as in fkbN- and fkbR-inactivated strains, fkbR is transcribed in all stages of cultivation, even before the onset of FK506 production, whereas fkbN expression is initiated approximately with the initiation of FK506 production. Surprisingly, inactivation of fkbN (or fkbR) does not abolish the transcription of the genes in the FK506 gene cluster in general, but may reduce expression of some of the tested biosynthetic genes. Finally, introduction of a second copy of the fkbR or fkbN genes under the control of the strong ermE* promoter into the wild type strain resulted in 30% and 55% of yield improvement, respectively. Conclusions Our results clearly demonstrate the positive regulatory role of fkbR and fkbN genes in FK506 biosynthesis in S. tsukubaensis NRRL 18488. We have shown that regulatory mechanisms can differ substantially from other, even apparently closely similar FK506-producing strains, reported in literature. Finally, we have demonstrated the potential of these genetically modified strains of S. tsukubaensis for improving the yield of fermentative processes for production of FK506.
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Affiliation(s)
- Dušan Goranovič
- Acies Bio d,o,o, Tehnološki Park 21, SI-1000, Ljubljana, Slovenia
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Gómez C, Olano C, Méndez C, Salas JA. Three pathway-specific regulators control streptolydigin biosynthesis in Streptomyces lydicus. Microbiology (Reading) 2012; 158:2504-2514. [DOI: 10.1099/mic.0.061325-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- Cristina Gómez
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, 33006 Oviedo, Spain
| | - Carlos Olano
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, 33006 Oviedo, Spain
| | - Carmen Méndez
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, 33006 Oviedo, Spain
| | - José A. Salas
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, 33006 Oviedo, Spain
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Roles of fkbN in positive regulation and tcs7 in negative regulation of FK506 biosynthesis in Streptomyces sp. strain KCTC 11604BP. Appl Environ Microbiol 2012; 78:2249-55. [PMID: 22267670 DOI: 10.1128/aem.06766-11] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
FK506 is an important 23-member polyketide macrolide with immunosuppressant activity. Its entire biosynthetic gene cluster was previously cloned from Streptomyces sp. strain KCTC 11604BP, and sequence analysis identified three putative regulatory genes, tcs2, tcs7, and fkbN, which encode proteins with high similarity to the AsnC family transcriptional regulators, LysR-type transcriptional regulators, and LAL family transcriptional regulators, respectively. Overexpression and in-frame deletion of tcs2 did not affect the production of FK506 or co-occurring FK520 compared to results for the wild-type strain, suggesting that tcs2 is not involved in their biosynthesis. fkbN overexpression improved the levels of FK506 and FK520 production by approximately 2.0-fold, and a deletion of fkbN caused the complete loss of FK506 and FK520 production. Although the overexpression of tcs7 decreased the levels of FK506 and FK520 production slightly, a deletion of tcs7 caused 1.9-fold and 1.5-fold increases in FK506 and FK520 production, respectively. Finally, fkbN overexpression in the tcs7 deletion strain resulted in a 4.0-fold (21 mg liter(-1)) increase in FK506 production compared to that by the wild-type strain. This suggests that fkbN encodes a positive regulatory protein essential for FK506/FK520 biosynthesis and that the gene product of tcs7 negatively regulates their biosynthesis, demonstrating the potential of exploiting this information for strain improvement. Semiquantitative reverse transcription-PCR (RT-PCR) analyses of the transcription levels of the FK506 biosynthetic genes in the wild-type and mutant strains proved that most of the FK506 biosynthetic genes are regulated by fkbN in a positive manner and negatively by tcs7.
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Martín JF, Liras P. Cascades and networks of regulatory genes that control antibiotic biosynthesis. Subcell Biochem 2012; 64:115-138. [PMID: 23080248 DOI: 10.1007/978-94-007-5055-5_6] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Onset of the biosynthesis of bioactive secondary metabolites in batch cultures of actinomycetes occurs after the rapid growth phase, following a transition phase which involves complex metabolic changes. This transition is triggered by nutrient starvation or by other environmental stress signals. Expression of genes encoding bioactive secondary metabolites is governed by cascades of pathway specific regulators and networks of cross-talking global regulators. Pathway specific regulators such as Streptomyces antibiotic regulatory proteins, LAL-type and LysR-type regulators respond to autoregulatory proteins that act in concert with their cognate ligands (e.g. γ-butyrolactone receptor proteins and their cognate γ-butyrolactone ligands). Global regulators such as PhoR-PhoP and other two component systems and orphan response regulators, such as GlnR, control set of genes affecting primary and secondary metabolism. GlnR and, therefore, nitrogen metabolism genes are under phosphate control exerted by binding of PhoP to PHO boxes located in the promoter region of GlnR. A few pleiotropic regulatory genes, such as areB (ndgR), dmdR1 or dasR connect primary metabolism (amino acid biosynthesis, N-acetylglucosamine or iron levels) with antibiotic biosynthesis. Some atypical response regulators that require specific small ligands appear to be involved in feedback control of antibiotic production. All these mechanisms together modulate, in a coordinated manner, different aspects of Streptomyces metabolism as a real "protection net" that prevents drastic changes in metabolism that may be deleterious for cell survival.
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Affiliation(s)
- Juan F Martín
- Department of Molecular Biology, University of León, León, 24071, Spain,
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Yu Q, Bai L, Zhou X, Deng Z. Inactivation of the positive LuxR-type oligomycin biosynthesis regulators OlmRI and OlmRII increases avermectin production in Streptomyces avermitilis. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s11434-011-4865-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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40
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Chen J, Xie J. Role and regulation of bacterial LuxR-like regulators. J Cell Biochem 2011; 112:2694-702. [DOI: 10.1002/jcb.23219] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Huang M, Li M, Feng Z, Liu Y, Chu Y, Tian Y. Enhanced rapamycin production in Streptomyces hygroscopicus by integrative expression of aveR, a LAL family transcriptional regulator. World J Microbiol Biotechnol 2011. [DOI: 10.1007/s11274-011-0673-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yin M, Lu T, Zhao LX, Chen Y, Huang SX, Lohman JR, Xu LH, Jiang CL, Shen B. The missing C-17 O-methyltransferase in geldanamycin biosynthesis. Org Lett 2011; 13:3726-9. [PMID: 21682254 DOI: 10.1021/ol201383w] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The biosynthetic gene clusters for the Hsp90 inhibitor geldanamycin (GDM, 1) have been cloned previously from three different Streptomyces strains, but the gene encoding the C-17 O-methyltransferase remains unknown. The cloning and sequencing of a new GDM biosynthetic gene cluster from Streptomyces autolyticus CGMCC 0516 was reported, identifying the gdmMT gene that encodes the missing C-17 O-methyltransferase for 1 biosynthesis.
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Affiliation(s)
- Min Yin
- Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, China
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Dai S, Ouyang Y, Wang G, Li X. Streptomyces autolyticus JX-47 large-insert bacterial artificial chromosome library construction and identification of clones covering geldanamycin biosynthesis gene cluster. Curr Microbiol 2011; 63:68-74. [PMID: 21544574 DOI: 10.1007/s00284-011-9940-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 04/19/2011] [Indexed: 11/28/2022]
Abstract
Geldanamycin belongs to benzoquinone ansamycin antibiotic and has potent antitumor activities. In this study, a bacterial artificial chromosome (BAC) library with an average insert size of up to 150 kb was constructed from genomic DNA of Streptomyces autolyticus JX-47. A genetic-screening strategy was established using BAC end-sequencing and three pairs of primers designed to target the remote regions, gdmA1, gdmA3 and gdmRI, of the geldanamycin gene cluster. Three clones covering geldanamycin biosynthesis gene cluster were obtained, which together spanned a 250-kb genomic region, and a 150227-bp insert in the clone p4E9 was sequenced. Comparison with the reported geldanamycin gene cluster sequences from S. hygroscopicus revealed that it had the same gene arrangement and high gene homology in the polyketide synthase (PKS) region and its downstream with 84-100% DNA identity and 81-100% amino acid (AA) identity. Its DNA homology with the whole gene cluster sequence from S. hygroscopicus strain 17997 reached 99% identity. However, upstream of the PKS region exhibited great diversity, where only ORF16 was conserved, and the other genes including gdmL and gdmX were displaced.
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Affiliation(s)
- Shikun Dai
- Key Laboratory of Marine Bio-Resources Sustainable Utilization, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
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Mo X, Wang Z, Wang B, Ma J, Huang H, Tian X, Zhang S, Zhang C, Ju J. Cloning and characterization of the biosynthetic gene cluster of the bacterial RNA polymerase inhibitor tirandamycin from marine-derived Streptomyces sp. SCSIO1666. Biochem Biophys Res Commun 2011; 406:341-7. [DOI: 10.1016/j.bbrc.2011.02.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 02/11/2011] [Indexed: 10/18/2022]
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Jeon HG, Seo J, Lee MJ, Han K, Kim ES. Analysis and functional expression of NPP pathway-specific regulatory genes in Pseudonocardia autotrophica. J Ind Microbiol Biotechnol 2011; 38:573-9. [PMID: 21259033 DOI: 10.1007/s10295-011-0939-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 01/04/2011] [Indexed: 01/15/2023]
Abstract
Using the genomics-guided polyene screening method, a rare actinomycetes called Pseudonocardia autotrophica was previously identified to contain functionally clustered nystatin-like biosynthetic genes and to produce a presumably novel polyene compound named nystatin-like Pseudonocardia polyene (NPP) (Kim et al., J Ind Microbiol Biotechnol 36:1425-1434, 2009). Since very low NPP productivity was observed in most P. autotrophica culture conditions, its biosynthetic pathway was proposed to be tightly regulated. Herein we report in silico analysis of six putative NPP pathway-specific regulatory genes present in its biosynthetic gene cluster, followed by functional overexpression of these regulatory genes in P. autotrophica. Three pathway-specific regulatory genes (nppRI, RIII, and RV) were predicted to belong to a typical LAL-type transcriptional family. Each regulatory gene was cloned under the strong constitutive ermE* promoter in a Streptomyces integrative pSET152 plasmid, followed by direct intergeneric conjugation from a plasmid-containing E. coli donor cell to P. autotrophica. While all the P. autotrophica exconjugants exhibited improved NPP productivity, the one containing nppRIII showed the highest NPP productivity improvement. In addition, culture-time-dependent analysis revealed that the nppRIII-stimulated NPP biosynthesis was more significant in the late exponential growth stage than in the stationary stage. Moreover, the P. autotrophica nppRIII-disruption mutant failed to produce NPP, with significantly reduced transcription levels of most npp biosynthetic genes. The results described suggest that identification and overexpression of key pathway-specific regulatory gene, followed by optimum harvest timing, should be critical factors to maximize the productivity of an intrinsically low-level metabolite such as NPP produced by rare actinomycetes species.
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Affiliation(s)
- Ho-Geun Jeon
- Department of Biological Engineering, Inha University, Incheon 402-751, Korea
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Ishida K, Lincke T, Behnken S, Hertweck C. Induced biosynthesis of cryptic polyketide metabolites in a Burkholderia thailandensis quorum sensing mutant. J Am Chem Soc 2011; 132:13966-8. [PMID: 20853892 DOI: 10.1021/ja105003g] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Genetic manipulation of the LuxR-type quorum sensing regulator system in Burkholderia thailandensis caused a significant change in the metabolic profile: it led to activation of the thailandamide biosynthesis gene cluster, dramatically increased thailandamide production, and induced strong pigmentation. A novel polyketide metabolite, thailandamide lactone (2), which cannot be detected in the wild type, was isolated from the mutant broth, and its structure was elucidated by high-resolution mass spectrometry and IR and NMR spectroscopy. In a biological assay using tumor cell lines, 2 showed moderate antiproliferative activities. This finding not only points to complex regulation but also serves as a proof of concept that engineering quorum sensing mutants may enable the discovery of novel bioactive natural products encoded by silent or only weakly expressed biosynthetic pathway genes.
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Affiliation(s)
- Keishi Ishida
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Beutenbergstr. 11a, 07745 Jena, Germany
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Carlson JC, Fortman JL, Anzai Y, Li S, Burr DA, Sherman DH. Identification of the tirandamycin biosynthetic gene cluster from Streptomyces sp. 307-9. Chembiochem 2010; 11:564-72. [PMID: 20127927 PMCID: PMC3019614 DOI: 10.1002/cbic.200900658] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Indexed: 11/10/2022]
Abstract
The structurally intriguing bicyclic ketal moiety of tirandamycin is common to several acyl-tetramic acid antibiotics, and is a key determinant of biological activity. We have identified the tirandamycin biosynthetic gene cluster from the environmental marine isolate Streptomyces sp. 307-9, thus providing the first genetic insight into the biosynthesis of this natural product scaffold. Sequence analysis revealed a hybrid polyketide synthase-nonribosomal peptide synthetase gene cluster with a colinear domain organization, which is entirely consistent with the core structure of the tirandamycins. We also identified genes within the cluster that encode candidate tailoring enzymes for elaboration and modification of the bicyclic ketal system. Disruption of tamI, which encodes a presumed cytochrome P450, led to a mutant strain deficient in production of late stage tirandamycins that instead accumulated tirandamycin C, an intermediate devoid of any post assembly-line oxidative modifications.
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Affiliation(s)
- Jacob C. Carlson
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
| | - J. L. Fortman
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
| | - Yojiro Anzai
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
| | - Shengying Li
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
| | - Douglas A. Burr
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
| | - David H. Sherman
- Life Sciences Institute and Departments of Medicinal Chemistry, Microbiology & Immunology and Chemistry, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan (US)
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Jørgensen H, Degnes KF, Sletta H, Fjærvik E, Dikiy A, Herfindal L, Bruheim P, Klinkenberg G, Bredholt H, Nygård G, Døskeland SO, Ellingsen TE, Zotchev SB. Biosynthesis of Macrolactam BE-14106 Involves Two Distinct PKS Systems and Amino Acid Processing Enzymes for Generation of the Aminoacyl Starter Unit. ACTA ACUST UNITED AC 2009; 16:1109-21. [DOI: 10.1016/j.chembiol.2009.09.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 09/15/2009] [Accepted: 09/18/2009] [Indexed: 10/20/2022]
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49
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Li C, Roege KE, Kelly WL. Analysis of the Indanomycin Biosynthetic Gene Cluster fromStreptomyces antibioticusNRRL 8167. Chembiochem 2009; 10:1064-72. [DOI: 10.1002/cbic.200800822] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Characterization of a regulatory gene, aveR, for the biosynthesis of avermectin in Streptomyces avermitilis. Appl Microbiol Biotechnol 2009; 82:1089-96. [DOI: 10.1007/s00253-008-1850-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Revised: 12/25/2008] [Accepted: 12/29/2008] [Indexed: 10/21/2022]
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