1
|
Zhang D, Jiang X, Liu S, Bai M, Lin X, Liu Y, Gao C, Gan Y. High-efficiency breeding of Bacillus siamensis with hyper macrolactins production using physical mutagenesis and a high-throughput culture system. J Biotechnol 2024; 395:S0168-1656(24)00251-7. [PMID: 39299520 DOI: 10.1016/j.jbiotec.2024.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 08/02/2024] [Accepted: 09/15/2024] [Indexed: 09/22/2024]
Abstract
Macrolactins have attracted considerable attention due to their value and application in medicine and agriculture. However, poor yields severely hinder their broader application in these fields. This study aimed to improve macrolactins production in Bacillus siamensis using a combined atmospheric and room-temperature plasma mutagenesis and a microbial microdroplet culture system. After 25 days of treatment, a desirable strain with macrolactins production 3.0-fold higher than that of the parental strain was successfully selected. The addition of 30mg/L ZnSO4 further increased macrolactins production to 503 ± 37.6μg/mL, representing a 30.9% improvement in production compared to controls. Based on transcriptome analysis, the synthesis pathways of amino acids, fengycin, and surfactin were found to be downregulated in IMD4036. Further fermentation experiments confirmed that inhibition of the comparative fengycin synthesis pathway was potentially driving the increased production of macrolactins. The strategies and possible mechanisms detailed in this study can provide insight into enhancing the production of other secondary metabolites toxic to the producer strains.
Collapse
Affiliation(s)
- Delin Zhang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Xiaodong Jiang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Sini Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Meng Bai
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Xiao Lin
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Yonghong Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Chenghai Gao
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China.
| | - Yuman Gan
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China.
| |
Collapse
|
2
|
Chen S, Chen Z, Lin X, Zhou X, Yang S, Tan H. Why different sugarcane cultivars show different resistant abilities to smut? : Comparisons of endophytic microbial compositions and metabolic functions in stems of sugarcane cultivars with different abilities to resist smut. BMC PLANT BIOLOGY 2023; 23:427. [PMID: 37710150 PMCID: PMC10500793 DOI: 10.1186/s12870-023-04446-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 09/06/2023] [Indexed: 09/16/2023]
Abstract
To elucidate the mechanisms underlying the resistance to smut of different sugarcane cultivars, endophytic bacterial and fungal compositions, functions and metabolites in the stems of the sugarcane cultivars were analyzed using high-throughput sequencing techniques and nontargeted metabolomics. The results showed that the levels of ethylene, salicylic acid and jasmonic acid in sugarcane varieties that were not sensitive to smut were all higher than those in sensitive sugarcane varieties. Moreover, endophytic fungi, such as Ramichloridium, Alternaria, Sarocladium, Epicoccum, and Exophiala species, could be considered antagonistic to sugarcane smut. Additionally, the highly active arginine and proline metabolism, pentose phosphate pathway, phenylpropanoid biosynthesis, and tyrosine metabolism in sugarcane varieties that were not sensitive to smut indicated that these pathways contribute to resistance to smut. All of the above results suggested that the relatively highly abundant antagonistic microbes and highly active metabolic functions of endophytes in non-smut-sensitive sugarcane cultivars were important for their relatively high resistance to smut.
Collapse
Affiliation(s)
- Siyu Chen
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Zhongliang Chen
- Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, 530007, Guangxi, P.R. China
| | - Xinru Lin
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Xinyan Zhou
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Shangdong Yang
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China.
| | - Hongwei Tan
- Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, 530007, Guangxi, P.R. China.
| |
Collapse
|
3
|
Ni J, Yu L, Li F, Li Y, Zhang M, Deng Y, Liu X. Macrolactin R from Bacillus siamensis and its antifungal activity against Botrytis cinerea. World J Microbiol Biotechnol 2023; 39:117. [PMID: 36918502 DOI: 10.1007/s11274-023-03563-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 03/02/2023] [Indexed: 03/16/2023]
Abstract
Botrytis cinerea is listed among the most important fungal pathogens infecting strawberries. The use of biological control agents, such as Bacillus species, offers an alternative and effective way to reduce airborne pathogens. The aim of this research was to select the macrolactin R produced by Bacillus siamensis with potential for using as biological agents against the pathogenetic fungi (Botrytis cinerea) of strawberries, and to assess the mechanisms involved. Macrolactin R had significant inhibitory effects on spore germination, germ tube elongation, and mycelial growth of Botrytis cinerea. The MICs of macrolactin R inhibitions in vitro was 12.5 mg/L and The EC50 value of NJ08-3 to Botrytis cinerea spores and mycelial was 1.93 and 2.88 mg/L, respectively. Macrolactin R impacted the membrane structure of Botrytis cinerea, resulting in changes in membrane permeability and leakage of proteins and nucleic acids, then cell death. The application of the macrolactin R of Bacillus siamensis reduced the disease severity index of gray mold on strawberries. This study demonstrated that the production of macrolactin R produced by Bacillus siamensis are involved in the antifungal activity against Botrytis cinerea.
Collapse
Affiliation(s)
- Jie Ni
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China
| | - Lian Yu
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China.
| | - Fei Li
- Guangxi Key Laboratory of Marine Environmental Science, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, P.R. China.
| | - Yulin Li
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China
| | - Mengfei Zhang
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China
| | - Yuping Deng
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China
| | - Xiaoling Liu
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, Guangxi, P.R. China
| |
Collapse
|
4
|
Abstract
Covering: January to December 2021This review covers the literature published in 2021 for marine natural products (MNPs), with 736 citations (724 for the period January to December 2021) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1425 in 416 papers for 2021), together with the relevant biological activities, source organisms and country of origin. Pertinent reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. An analysis of the number of authors, their affiliations, domestic and international collection locations, focus of MNP studies, citation metrics and journal choices is discussed.
Collapse
Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.,School of Enivironment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, and School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | | |
Collapse
|
5
|
Marine Natural Products from the Beibu Gulf: Sources, Chemistry, and Bioactivities. Mar Drugs 2023; 21:md21020063. [PMID: 36827104 PMCID: PMC9965070 DOI: 10.3390/md21020063] [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: 12/27/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023] Open
Abstract
Marine natural products (MNPs) play an important role in the discovery and development of new drugs. The Beibu Gulf of South China Sea harbors four representative marine ecosystems, including coral reefs, mangroves, seaweed beds, and coastal wetlands, which are rich in underexplored marine biological resources that produce a plethora of diversified MNPs. In our ongoing efforts to discover novel and biologically active MNPs from the Beibu Gulf, we provide a systematic overview of the sources, chemical structures, and bioactive properties of a total of 477 new MNPs derived from the Beibu Gulf, citing 133 references and covering the literature from the first report in November 2003 up to September 2022. These reviewed MNPs were structurally classified into polyketides (43%), terpenoids (40%), nitrogen-containing compounds (12%), and glucosides (5%), which mainly originated from microorganisms (52%) and macroorganisms (48%). Notably, they were predominantly found with cytotoxic, antibacterial, and anti-inflammatory activities. This review will shed light on these untapped Beibu Gulf-derived MNPs as promising lead compounds for the development of new drugs.
Collapse
|
6
|
Secondary Metabolites from Marine-Derived Bacillus: A Comprehensive Review of Origins, Structures, and Bioactivities. Mar Drugs 2022; 20:md20090567. [PMID: 36135756 PMCID: PMC9501603 DOI: 10.3390/md20090567] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/30/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
The marine is a highly complex ecosystem including various microorganisms. Bacillus species is a predominant microbialflora widely distributed in marine ecosystems. This review aims to provide a systematic summary of the newly reported metabolites produced by marine-derived Bacillus species over recent years covering the literature from 2014 to 2021. It describes the structural diversity and biological activities of the reported compounds. Herein, a total of 87 newly reported metabolites are included in this article, among which 49 compounds originated from marine sediments, indicating that marine sediments are majority sources of productive strains of Bacillus species Therefore, marine-derived Bacillus species are a potentially promising source for the discovery of new metabolites.
Collapse
|
7
|
Gan Y, Bai M, Lin X, Liu K, Huang B, Jiang X, Liu Y, Gao C. Improvement of macrolactins production by the genetic adaptation of Bacillus siamensis A72 to saline stress via adaptive laboratory evolution. Microb Cell Fact 2022; 21:147. [PMID: 35854349 PMCID: PMC9294813 DOI: 10.1186/s12934-022-01871-9] [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: 05/01/2022] [Accepted: 07/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Macrolactins, a type of macrolide antibiotic, are toxic to the producer strains. As such, its level is usually maintained below the lethal concentration during the fermentation process. To improve the production of macrolactins, we applied adaptive laboratory evolution technology to engineer a saline-resistant mutant strain. The hypothesis that strains with saline resistance show improved macrolactins production was investigated. RESULTS Using saline stress as a selective pressure, we engineered a mutant strain with saline resistance coupled with enhanced macrolactins production within 60 days using a self-made device. As compared with the parental strain, the evolved strain produced macrolactins with 11.93% improvement in non-saline stress fermentation medium containing 50 g/L glucose, when the glucose concentration increased to 70 g/L, the evolved strain produced macrolactins with 71.04% improvement. RNA sequencing and metabolomics results revealed that amino acid metabolism was involved in the production of macrolactins in the evolved strain. Furthermore, genome sequencing of the evolved strain revealed a candidate mutation, hisDD41Y, that was causal for the improved MLNs production, it was 3.42 times higher than the control in the overexpression hisDD41Y strain. Results revealed that saline resistance protected the producer strain from feedback inhibition of end-product (macrolide antibiotic), resulting in enhanced MLNs production. CONCLUSIONS In the present work, we successfully engineered a mutant strain with enhanced macrolactins production by adaptive laboratory evolution using saline stress as a selective pressure. Based on physiological, transcriptomic and genetic analysis, amino acid metabolism was found to benefit macrolactins production improvement. Our strategy might be applicable to improve the production of other kinds of macrolide antibiotics and other toxic compounds. The identification of the hisD mutation will allow for the deduction of metabolic engineering strategies in future research.
Collapse
Affiliation(s)
- Yuman Gan
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China.
| | - Meng Bai
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China
| | - Xiao Lin
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China
| | - Bingyao Huang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China
| | - Xiaodong Jiang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China
| | - Yonghong Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China.
| | - Chenghai Gao
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi, 530001, People's Republic of China.
| |
Collapse
|
8
|
Sugarcane Smut: Current Knowledge and the Way Forward for Management. J Fungi (Basel) 2021; 7:jof7121095. [PMID: 34947077 PMCID: PMC8703903 DOI: 10.3390/jof7121095] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 02/08/2023] Open
Abstract
Whip smut of sugarcane is the most serious and widely spread disease of sugarcane and causes a significant reduction in cane quantity and quality. The severity of this disease often depends on the pathogen races, environmental conditions, cultivar genotype and the interaction among these three factors. Under optimum climatic conditions, this disease has the potential to cause total crop failure. Resistance screening is an ongoing process due to the variability among smut pathogen isolates. Multiple races and mutation ability of smut pathogen makes the breeding task more complex. A number of studies on various aspects of the disease epidemiology and management have been published. Due to many overlapping characteristics within the species complex, there is a dearth of information on early detection and strategies to control the smut pathogen. Furthermore, there is a need to coordinate these findings to expedite its research and control. In this paper, we summarize the disease etiology, especially disease impact on the qualitative and quantitative parameters of sugarcane. We also gathered research progress on molecular-based detection and available information on genetic variability in S.scitamineum. The research on the set of management options needed to effectively cope with the disease are reviewed herein. The present review is expected to be helpful for the further investigation on smut resistance in sugarcane.
Collapse
|
9
|
Dat TTH, Cuc NTK, Cuong PV, Smidt H, Sipkema D. Diversity and Antimicrobial Activity of Vietnamese Sponge-Associated Bacteria. Mar Drugs 2021; 19:md19070353. [PMID: 34206202 PMCID: PMC8307940 DOI: 10.3390/md19070353] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 12/13/2022] Open
Abstract
This study aimed to assess the diversity and antimicrobial activity of cultivable bacteria associated with Vietnamese sponges. In total, 460 bacterial isolates were obtained from 18 marine sponges. Of these, 58.3% belonged to Proteobacteria, 16.5% to Actinobacteria, 18.0% to Firmicutes, and 7.2% to Bacteroidetes. At the genus level, isolated strains belonged to 55 genera, of which several genera, such as Bacillus, Pseudovibrio, Ruegeria, Vibrio, and Streptomyces, were the most predominant. Culture media influenced the cultivable bacterial composition, whereas, from different sponge species, similar cultivable bacteria were recovered. Interestingly, there was little overlap of bacterial composition associated with sponges when the taxa isolated were compared to cultivation-independent data. Subsequent antimicrobial assays showed that 90 isolated strains exhibited antimicrobial activity against at least one of seven indicator microorganisms. From the culture broth of the isolated strain with the strongest activity (Bacillus sp. M1_CRV_171), four secondary metabolites were isolated and identified, including cyclo(L-Pro-L-Tyr) (1), macrolactin A (2), macrolactin H (3), and 15,17-epoxy-16-hydroxy macrolactin A (4). Of these, compounds 2-4 exhibited antimicrobial activity against a broad spectrum of reference microorganisms.
Collapse
Affiliation(s)
- Ton That Huu Dat
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
- Correspondence: (T.T.H.D.); (D.S.); Tel.: +84-94-949-2778 (T.T.H.D.); +31-317-483-113 (D.S.)
| | - Nguyen Thi Kim Cuc
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
| | - Pham Viet Cuong
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
| | - Detmer Sipkema
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
- Correspondence: (T.T.H.D.); (D.S.); Tel.: +84-94-949-2778 (T.T.H.D.); +31-317-483-113 (D.S.)
| |
Collapse
|