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Orleneva AP, Teslya PN, Serebrianyi VA. In vivo assembly of genetic constructs in filamentous fungus Talaromyces cellulolyticus. J Microbiol Methods 2024; 219:106893. [PMID: 38320738 DOI: 10.1016/j.mimet.2024.106893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 02/10/2024]
Abstract
In the filamentous fungus Talaromyces cellulolyticus, similar to other filamentous fungi, non-homologous recombination predominates over homologous recombination. For instance, to achieve an acceptable integration frequency of a genetic construct into a target site on the intact chromosome, the flanking sequences directing this integration should be approximately 2.5 kb in length. However, despite the requirement of long flanks for integration into the intact chromosome, we found that homologous recombination between linear DNA fragments in T. cellulolyticus effectively occurs when these fragments overlap by just 50 bp. This allows for the assembly of full-sized genetic constructs in vivo from relatively small blocks, eliminating the need for in vitro assembly, similar to the approach previously developed for the yeast Saccharomyces cerevisiae. To validate this possibility, we replaced the native promoter of the target gene by transforming the recipient strain with five DNA fragments: two flanks for recombination with the target locus, two parts of the marker gene, and a donor promoter. This discovery significantly expedites the genetic engineering of T. cellulolyticus and potentially other fungi.
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Affiliation(s)
- Alexandra P Orleneva
- Ajinomoto-Genetika Research Institute, 1st Dorozhny proezd, 1-1, Moscow 117545, Russia
| | - Petr N Teslya
- Ajinomoto-Genetika Research Institute, 1st Dorozhny proezd, 1-1, Moscow 117545, Russia
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Liu J, Wang C, Kong L, Yang Y, Cui X, Li K, Nian H. Rho2 involved in development, stress response and pathogenicity of Fusarium oxysporum. World J Microbiol Biotechnol 2023; 39:272. [PMID: 37548840 DOI: 10.1007/s11274-023-03720-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 08/02/2023] [Indexed: 08/08/2023]
Abstract
Rho GTPases regulate the activity of cell wall biosynthesis, actin assembly and polar cell secretion. However, the function of Rho GTPase in filamentous fungi is poorly understood. To understand the role of Rho2 GTPase in Fusarium oxysporum, which is one of root rot pathogens of Panax notoginseng, △rho2 mutant was constructed. Phenotypes of △rho2, including conidiation, germination of spores, stresses (osmotic-, cell membrane-, cell wall disturbing-, metal-, and high temperature-) tolerance and pathogenicity were analyzed. The results showed that the growth of △rho2 was destroyed under cell wall disturbing stress and high temperature stress, suggesting that Rho2 regulated the response of F. oxysporum to cell wall synthesis inhibitors and high temperature stress. Germination of spores and pathogenicity to P. notoginseng were reduced in △rho2 mutant. Western blot results showed that rho2 deletion increased the phosphorylation level of Mpk1. To identify genes regulated by Rho2, transcriptome sequencing was carried out. 2477 genes were identified as upregulated genes and 2177 genes were identified as downregulated genes after rho2 was deleted. These genes provide clues for further study of rho2 function.
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Affiliation(s)
- Jia Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
| | - Chengsong Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
| | - Lei Kong
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
| | - Ye Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
- Key Laboratory of Panax notoginseng Resources Sustainable Development and Utilization of State Administration of Traditional Chinese Medicine, Kunming, 650500, China
| | - Xiuming Cui
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
- Key Laboratory of Panax notoginseng Resources Sustainable Development and Utilization of State Administration of Traditional Chinese Medicine, Kunming, 650500, China
| | - Kunzhi Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
| | - Hongjuan Nian
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China.
- Key Laboratory of Panax notoginseng Resources Sustainable Development and Utilization of State Administration of Traditional Chinese Medicine, Kunming, 650500, China.
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Favilla LD, Herman TS, Goersch CDS, de Andrade RV, Felipe MSS, Bocca AL, Fernandes L. Expanding the Toolbox for Functional Genomics in Fonsecaea pedrosoi: The Use of Split-Marker and Biolistic Transformation for Inactivation of Tryptophan Synthase ( trpB) Gene. J Fungi (Basel) 2023; 9:jof9020224. [PMID: 36836338 PMCID: PMC9963410 DOI: 10.3390/jof9020224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 01/27/2023] [Accepted: 01/31/2023] [Indexed: 02/11/2023] Open
Abstract
Chromoblastomycosis (CBM) is a disease caused by several dematiaceous fungi from different genera, and Fonsecaea is the most common which has been clinically isolated. Genetic transformation methods have recently been described; however, molecular tools for the functional study of genes have been scarcely reported for those fungi. In this work, we demonstrated that gene deletion and generation of the null mutant by homologous recombination are achievable for Fonsecaea pedrosoi by the use of two approaches: use of double-joint PCR for cassette construction, followed by delivery of the split-marker by biolistic transformation. Through in silico analyses, we identified that F. pedrosoi presents the complete enzymatic apparatus required for tryptophan (trp) biosynthesis. The gene encoding a tryptophan synthase trpB -which converts chorismate to trp-was disrupted. The ΔtrpB auxotrophic mutant can grow with external trp supply, but germination, viability of conidia, and radial growth are defective compared to the wild-type and reconstituted strains. The use of 5-FAA for selection of trp- phenotypes and for counter-selection of strains carrying the trp gene was also demonstrated. The molecular tools for the functional study of genes, allied to the genetic information from genomic databases, significantly boost our understanding of the biology and pathogenicity of CBM causative agents.
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Affiliation(s)
- Luísa Dan Favilla
- Laboratory of Applied Immunology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Molecular Biology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
| | - Tatiana Sobianski Herman
- Laboratory of Applied Immunology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Molecular Patology, Faculty of Medicine, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
| | - Camila da Silva Goersch
- Laboratory of Applied Immunology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Microbial Biology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
| | - Rosangela Vieira de Andrade
- Graduate Program of Genomic Sciences and Biotechnology, Catholic University of Brasilia, Campus Asa Norte, Asa Norte, Federal District, Taguatinga 70790-160, Brazil
| | - Maria Sueli Soares Felipe
- Graduate Program of Genomic Sciences and Biotechnology, Catholic University of Brasilia, Campus Asa Norte, Asa Norte, Federal District, Taguatinga 70790-160, Brazil
| | - Anamélia Lorenzetti Bocca
- Laboratory of Applied Immunology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Molecular Biology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Molecular Patology, Faculty of Medicine, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
| | - Larissa Fernandes
- Laboratory of Applied Immunology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Graduate Program in Microbial Biology, Institute of Biology, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Federal District, Brasilia 70910-900, Brazil
- Centro Metropolitano, Faculty of Ceilândia, Campus UnB Ceilândia, University of Brasília, Ceilândia Sul, Federal District, Brasilia 72220-275, Brazil
- Correspondence:
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Boontawon T, Nakazawa T, Xu H, Kawauchi M, Sakamoto M, Honda Y. Gene targeting using pre-assembled Cas9 ribonucleoprotein and split-marker recombination in Pleurotus ostreatus. FEMS Microbiol Lett 2021; 368:6307511. [PMID: 34156066 DOI: 10.1093/femsle/fnab080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 06/20/2021] [Indexed: 12/23/2022] Open
Abstract
Until recently, classical breeding has been used to generate improved commercial mushroom strains; however, classical breeding remains to be laborious and time-consuming. In this study, we performed gene mutagenesis using Cas9 ribonucleoprotein (Cas9 RNP) as a plasmid-free genome editing in Pleurotus ostreatus, which is one of the most economically important cultivated mushrooms. The pre-assembled Cas9/sgRNA targeting pyrG was introduced into protoplasts of a wild-type monokaryotic P. ostreatus strain PC9, which resulted in a generation of strains exhibiting resistance to 5-fluoroorotic acid. Small insertions/deletions at the target site were identified using genomic PCR followed by sequencing. The results showed Cas9 RNP-assisted gene mutagenesis could be applied for the molecular breeding in P. ostreatus and in other edible mushroom strains. Furthermore, gene disruption via split-marker recombination using the Cas9 RNP system was also successfully demonstrated in wild-type P. ostreatus PC9. This method could overcome the disadvantages of NHEJ-deficiency in conventional studies with gene targeting, and also difficulty in gene targeting in various non-model agaricomycetes.
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Affiliation(s)
- Tatpong Boontawon
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takehito Nakazawa
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
| | - Haibo Xu
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
| | - Moriyuki Kawauchi
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masahiro Sakamoto
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yoichi Honda
- Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
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Song X, Wang Y, Wang P, Pu G, Zou X. GATA‐type transcriptional factor Gat1 regulates nitrogen uptake and polymalic acid biosynthesis in polyextremotolerant fungus
Aureobasidium pullulans. Environ Microbiol 2019; 22:229-242. [DOI: 10.1111/1462-2920.14841] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/17/2019] [Accepted: 10/22/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Xiaodan Song
- College of Pharmaceutical SciencesSouthwest University Chongqing 400715 People's Republic of China
| | - Yongkang Wang
- College of Pharmaceutical SciencesSouthwest University Chongqing 400715 People's Republic of China
| | - Pan Wang
- College of Pharmaceutical SciencesSouthwest University Chongqing 400715 People's Republic of China
| | - Guihong Pu
- College of Pharmaceutical SciencesSouthwest University Chongqing 400715 People's Republic of China
| | - Xiang Zou
- College of Pharmaceutical SciencesSouthwest University Chongqing 400715 People's Republic of China
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Nielsen MR, Sondergaard TE, Giese H, Sørensen JL. Advances in linking polyketides and non-ribosomal peptides to their biosynthetic gene clusters in Fusarium. Curr Genet 2019; 65:1263-1280. [DOI: 10.1007/s00294-019-00998-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 11/24/2022]
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Kang X, Liu C, Shen P, Hu L, Lin R, Ling J, Xiong X, Xie B, Liu D. Genomic Characterization Provides New Insights Into the Biosynthesis of the Secondary Metabolite Huperzine a in the Endophyte Colletotrichum gloeosporioides Cg01. Front Microbiol 2019; 9:3237. [PMID: 30671042 PMCID: PMC6331491 DOI: 10.3389/fmicb.2018.03237] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 12/13/2018] [Indexed: 01/07/2023] Open
Abstract
A reliable source of Huperzine A (HupA) meets an urgent need due to its wide use in Alzheimer's disease treatment. In this study, we sequenced and characterized the whole genomes of two HupA-producing endophytes, Penicillium polonicum hy4 and Colletotrichum gloeosporioides Cg01, to clarify the mechanism of HupA biosynthesis. The whole genomes of hy4 and Cg01 were 33.92 and 55.77 Mb, respectively. We compared the differentially expressed genes (DEGs) between the induced group (with added extracts of Huperzia serrata) and a control group. We focused on DEGs with similar expression patterns in hy4 and Cg01. The DEGs identified in GO (Gene ontology) and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways were primarily located in carbon and nitrogen metabolism and nucleolus, ribosome, and rRNA processing. Furthermore, we analyzed the gene expression for HupA biosynthesis genes proposed in plants, which include lysine decarboxylase (LDC), copper amine oxidase (CAO), polyketides synthases (PKS), etc. Two LDCs, one CAO, and three PKSs in Cg01 were selected as prime candidates for further validation. We found that single candidate biosynthesis-gene knock-out did not influence the HupA production, while both LDC gene knock-out led to increased HupA production. These results reveal that HupA biosynthesis in endophytes might differ from that proposed in plants, and imply that the HupA-biosynthesis genes in endophytic fungi might co-evolve with the plant machinery rather than being acquired through horizontal gene transfer (HGT). Moreover, we analyzed the function of the differentially expressed epigenetic modification genes. HupA production of the histone acetyltransferase (HAT) deletion mutant ΔCgSAS-2 was not changed, while that of the histone methyltransferase (HMT) and histone deacetylase (HDAC) deletion mutants ΔCgClr4, ΔCgClr3, and ΔCgSir2-6 was reduced. Recovery of HupA-biosynthetic ability can be achieved by retro-complementation, demonstrating that HMT and HDACs associated with histone modification are involved in the regulation of HupA biosynthesis in endophytic fungi. This is the first report on epigenetic modification in high value secondary metabolite- producing endophytes. These findings shed new light on HupA biosynthesis and regulation in HupA-producing endophytes and are crucial for industrial production of HupA from fungi.
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Affiliation(s)
- Xincong Kang
- Horticulture and Landscape College, Hunan Agricultural University, Changsha, China,Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China,State Key Laboratory of Subhealth Intervention Technology, Changsha, China
| | - Chichuan Liu
- Institutes of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Pengyuan Shen
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China,State Key Laboratory of Subhealth Intervention Technology, Changsha, China
| | - Liqin Hu
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China,State Key Laboratory of Subhealth Intervention Technology, Changsha, China
| | - Runmao Lin
- Institutes of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jian Ling
- Institutes of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xingyao Xiong
- Horticulture and Landscape College, Hunan Agricultural University, Changsha, China,Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China,Institutes of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Bingyan Xie
- Institutes of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dongbo Liu
- Horticulture and Landscape College, Hunan Agricultural University, Changsha, China,Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China,State Key Laboratory of Subhealth Intervention Technology, Changsha, China,Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, China,*Correspondence: Dongbo Liu
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An efficient gene disruption method using a positive–negative split-selection marker and Agrobacterium tumefaciens-mediated transformation for Nomuraea rileyi. World J Microbiol Biotechnol 2018; 34:26. [DOI: 10.1007/s11274-018-2409-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 01/08/2018] [Indexed: 11/25/2022]
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Jiang T, Wang M, Li L, Si J, Song B, Zhou C, Yu M, Wang X, Zhang Y, Ding G, Zou Z. Overexpression of the Global Regulator LaeA in Chaetomium globosum Leads to the Biosynthesis of Chaetoglobosin Z. JOURNAL OF NATURAL PRODUCTS 2016; 79:2487-2494. [PMID: 27759375 DOI: 10.1021/acs.jnatprod.6b00333] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Overexpression of laeA in Chaetomium globosum CBS148.51 up-regulated expression of the chaetoglobosin gene cluster and resulted in the isolation of a new cytochalasan, chaetoglobosin Z (1), together with six known analogues, chaetoglobosins A (2), B (3), D (4), E (5), O (6), and V (7). RT-PCR analysis confirmed that the key genes in the chaetoglobosin gene cluster were significantly up-regulated. The structure of the new compound chaetoglobosin Z (1) was elucidated using NMR data. The relative and absolute configurations were determined by NOESY and electronic circular dichroism combined with quantum-chemical calculations adopting time-dependent density functional theory methods, respectively. These compounds displayed strong biological effects against the HepG 2 cell line compared with the positive control. The results further supported that LaeA is a global regulator that could up-regulate and/or activate cryptic gene clusters to produce new secondary metabolites.
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Affiliation(s)
- Tao Jiang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
| | - Menghua Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
| | - Li Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica , Beijing 100050, People's Republic of China
| | - Jinguang Si
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
- School of Pharmacy, Henan University of Traditional Chinese Medicine , Zhengzhou 450046, People's Republic of China
| | - Bo Song
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
| | - Cao Zhou
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
| | - Meng Yu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
| | - Xuewei Wang
- Institute of Microbiology, Chinese Academy of Sciences , Beijing 100090, People's Republic of China
| | - Yonggang Zhang
- Key Laboratory for Applied Microbiology of Shandong Province , Jinan 250014, People's Republic of China
| | - Gang Ding
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica , Beijing 100050, People's Republic of China
| | - Zhongmei Zou
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Beijing, 100193, People's Republic of China
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Biosynthesis of Antibiotic Leucinostatins in Bio-control Fungus Purpureocillium lilacinum and Their Inhibition on Phytophthora Revealed by Genome Mining. PLoS Pathog 2016; 12:e1005685. [PMID: 27416025 PMCID: PMC4946873 DOI: 10.1371/journal.ppat.1005685] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 05/18/2016] [Indexed: 12/18/2022] Open
Abstract
Purpureocillium lilacinum of Ophiocordycipitaceae is one of the most promising and commercialized agents for controlling plant parasitic nematodes, as well as other insects and plant pathogens. However, how the fungus functions at the molecular level remains unknown. Here, we sequenced two isolates (PLBJ-1 and PLFJ-1) of P. lilacinum from different places Beijing and Fujian. Genomic analysis showed high synteny of the two isolates, and the phylogenetic analysis indicated they were most related to the insect pathogen Tolypocladium inflatum. A comparison with other species revealed that this fungus was enriched in carbohydrate-active enzymes (CAZymes), proteases and pathogenesis related genes. Whole genome search revealed a rich repertoire of secondary metabolites (SMs) encoding genes. The non-ribosomal peptide synthetase LcsA, which is comprised of ten C-A-PCP modules, was identified as the core biosynthetic gene of lipopeptide leucinostatins, which was specific to P. lilacinum and T. ophioglossoides, as confirmed by phylogenetic analysis. Furthermore, gene expression level was analyzed when PLBJ-1 was grown in leucinostatin-inducing and non-inducing medium, and 20 genes involved in the biosynthesis of leucionostatins were identified. Disruption mutants allowed us to propose a putative biosynthetic pathway of leucinostatin A. Moreover, overexpression of the transcription factor lcsF increased the production (1.5-fold) of leucinostatins A and B compared to wild type. Bioassays explored a new bioactivity of leucinostatins and P. lilacinum: inhibiting the growth of Phytophthora infestans and P. capsici. These results contribute to our understanding of the biosynthetic mechanism of leucinostatins and may allow us to utilize P. lilacinum better as bio-control agent. Purpureocillium lilacinum, a well-known bio-control agent against various plant pathogens in agriculture, can produce antibiotic leucinostatins—peptaibiotic with extensive biological activities, including antimalarial, antiviral, antibacterial, antifungal, and antitumor activities, as well as phytotoxic. We have sequenced the genomes of two P. lilacinum isolates, and compared them with other fungi, focusing on their bio-control characteristics. We discovered a rich repertoire of CAZymes, proteases, SMs and pathogenesis related genes. We also identified a gene cluster containing 20 genes involved in the leucinostatins A and B biosynthesis by gene deletion, qRT-PCR and RNA-seq analyses. A transcription factor in the pathway was overexpressed, resulting in the upregulation of the related genes and a 1.5-fold increase in leucinostatins A and B. A new bioactivity of leucinostatins, inhibition of the growth of the notorious Phytophthora, was identified in this study by confronting incubation with P. lilacinum. These results provided new strategies for the agricultural development of leucinostatins and improving P. lilacinum strains.
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High-Throughput Construction of Genetically Modified Fungi. Fungal Biol 2016. [DOI: 10.1007/978-3-319-27951-0_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Cheng L, Ling J, Liang L, Luo Z, Zhang J, Xie B. Qip gene in Fusarium oxysporum is required for normal hyphae morphology and virulence. Mycology 2015; 6:130-137. [PMID: 30151321 PMCID: PMC6106068 DOI: 10.1080/21501203.2015.1027313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 03/04/2015] [Indexed: 01/07/2023] Open
Abstract
Ribonucleic acid (RNA)-silencing mechanisms exist in many eukaryotes to regulate a variety of biological processes. The known molecular components are related to Dicers, Argonautes and RNA-dependent RNA polymerases. Previous biochemical studies have also suggested that Qip, with an exonuclease domain, facilitates the conversion of duplex small interfering RNAs into single strands. In our study, the Qip gene in Fusarium oxysporum was disrupted using homologous recombination technology. The deletion of the Qip gene resulted in a decrease in colony growth rates but increased the number of branches. Additionally, the ΔQip mutant had a reduced pathogenicity in cabbage. Our results show Qip gene in F. oxysporum is required for normal hyphae morphology and virulence. The mutant will be useful for elucidating the relationship between the RNA-silencing mechanism and hyphal growth and development in F. oxysporum.
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Affiliation(s)
- Lin Cheng
- College of Life Science, Shanxi Normal University, Gong yuan Street No. 1, Yaodu, Linfen041004, China
| | - Jian Ling
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, South Street No. 12, Zhongguancun, Haidian, Beijing100081, China
| | - Liqin Liang
- College of Life Science, Shanxi Normal University, Gong yuan Street No. 1, Yaodu, Linfen041004, China
| | - Zhongqin Luo
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, South Street No. 12, Zhongguancun, Haidian, Beijing100081, China
| | - Jie Zhang
- College of Life Science, Shanxi Normal University, Gong yuan Street No. 1, Yaodu, Linfen041004, China
| | - Bingyan Xie
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, South Street No. 12, Zhongguancun, Haidian, Beijing100081, China
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Shen B, Xiao J, Dai L, Huang Y, Mao Z, Lin R, Yao Y, Xie B. Development of a high-efficiency gene knockout system for Pochonia chlamydosporia. Microbiol Res 2015; 170:18-26. [DOI: 10.1016/j.micres.2014.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/02/2014] [Accepted: 10/04/2014] [Indexed: 11/28/2022]
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