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Choudhary A, Naughton LM, Dobson ADW, Rai DK. High-performance liquid chromatography/electrospray ionisation mass spectrometric characterisation of metabolites produced by Pseudovibrio sp. W64, a marine sponge derived bacterium isolated from Irish waters. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1737-1745. [PMID: 29971859 DOI: 10.1002/rcm.8226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/22/2018] [Accepted: 06/24/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE In recent years, metabolites produced by Pseudovibrio species have gained scientific attention due to their potent antimicrobial activity. Recently, we also have assessed the antibacterial activities of Pseudovibrio sp. W64 isolates against Staphylococcus aureus, where only the dominant tropodithietic acid (TDA) was identified. However, characterisation of other metabolites is necessary as these metabolites may also serve as potent antimicrobial agents. METHODS Liquid chromatography/tandem mass spectrometry (LC/MS/MS), aided by accurate mass measurements, was employed to screen and characterise a range of metabolites produced by Pseudovibrio sp. W64 via assessment of ethyl acetate fractions generated from bacterial cultures. RESULTS Thirteen metabolites unique to the bacterial culture were detected and their chemical structures were assigned by MS/MS and accurate mass measurements. Among the thirteen metabolites, a methyl ester of TDA, a number of cholic acid derivatives, and amino diols and triols were characterised. CONCLUSIONS Pseudovibrio sp. W64 produces methylated TDA in addition to TDA, and metabolises lipids and amino acids in the cell-culture medium. To the best of our knowledge, this is the first report of methylated TDA, cholic acid and its various analogs, and sphinganine being detected in this Pseudovibrio strain. The data generated may help to better understand the biochemical processes and metabolism of bacterial strains towards discovery of antimicrobial agents from marine sources.
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Affiliation(s)
- Alka Choudhary
- Department of Food Biosciences, Teagasc Food Research Centre Ashtown, Dublin, D15 KN3K, Ireland
| | - Lynn M Naughton
- School of Microbiology, University College Cork, Western Road, Cork, T12 YN60, Ireland
| | - Alan D W Dobson
- School of Microbiology, University College Cork, Western Road, Cork, T12 YN60, Ireland
- Environmental Research Institute, University College Cork, Lee Road, Cork, T23 XE10, Ireland
| | - Dilip K Rai
- Department of Food Biosciences, Teagasc Food Research Centre Ashtown, Dublin, D15 KN3K, Ireland
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Dobson TE, Maxwell AR, Ramsubhag A. Antimicrobial cholic acid derivatives from the Pitch Lake bacterium Bacillus amyloliquefaciens UWI-W23. Steroids 2018; 135:50-53. [PMID: 29702138 DOI: 10.1016/j.steroids.2018.04.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 03/18/2018] [Accepted: 04/18/2018] [Indexed: 02/08/2023]
Abstract
Six cholic acid derivatives (1-6) were isolated from broth cultures of Bacillus amyloliquefaciens UWI-W23, an isolate from the Trinidad Pitch Lake. The compounds were extracted via solvent extraction and/or XAD resin adsorption and purified using silica gel column chromatography. Their structures were elucidated using 1D, 2D NMR and ESI-MS spectrometry and FT-IR spectrophotometry. One of the compounds, taurodeoxycholate (2) is for the first time being reported from a bacterial source while deoxycholate (4) is for the first time being reported from a Gram-positive bacterium. The other compounds have not been previously isolated from Bacillus spp. viz. cholate (1), taurocholic acid (3); glycodeoxycholic acid (5) and glycocholic acid (6). All six compounds exhibited antimicrobial activity against P. aeruginosa and B. cereus with MICs ranging from 7 to 250 µg/mL. Cholate (1) also showed activity against MRSA (MICs = 125 µg/mL) and glycocholic acid (6) against S. cerevisiae (MICs = 15.6 µg/mL).
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Affiliation(s)
- Tresha E Dobson
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Anderson R Maxwell
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Adesh Ramsubhag
- Department of Life Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
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Zhang H, Hua Y, Chen J, Li X, Bai X, Wang H. Organism-derived phthalate derivatives as bioactive natural products. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2018; 36:125-144. [PMID: 30444179 DOI: 10.1080/10590501.2018.1490512] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phthalates are widely used in polymer materials as a plasticizer. These compounds possess potent toxic variations depending on their chemical structures. However, a growing body of evidence indicates that phthalate compounds are undoubtedly discovered in secondary metabolites of organisms, including plants, animals and microorganisms. This review firstly summarizes biological sources of various phthalates and their bioactivities reported during the past few decades as well as their environmental toxicities and public health risks. It suggests that these organisms are one of important sources of natural phthalates with diverse profiles of bioactivity and toxicity.
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Affiliation(s)
- Huawei Zhang
- a School of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou , China
| | - Yi Hua
- a School of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou , China
| | - Jianwei Chen
- a School of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou , China
| | - Xiuting Li
- b Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University , Beijing , China
| | - Xuelian Bai
- c College of Life and Environmental Sciences , Hangzhou Normal University , Hangzhou , China
| | - Hong Wang
- a School of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou , China
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Biofilm Formation and Detachment in Gram-Negative Pathogens Is Modulated by Select Bile Acids. PLoS One 2016; 11:e0149603. [PMID: 26992172 PMCID: PMC4798295 DOI: 10.1371/journal.pone.0149603] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 02/03/2016] [Indexed: 11/19/2022] Open
Abstract
Biofilms are a ubiquitous feature of microbial community structure in both natural and host environments; they enhance transmission and infectivity of pathogens and provide protection from human defense mechanisms and antibiotics. However, few natural products are known that impact biofilm formation or persistence for either environmental or pathogenic bacteria. Using the combination of a novel natural products library from the fish microbiome and an image-based screen for biofilm inhibition, we describe the identification of taurine-conjugated bile acids as inhibitors of biofilm formation against both Vibrio cholerae and Pseudomonas aeruginosa. Taurocholic acid (1) was isolated from the fermentation broth of the fish microbiome-derived strain of Rhodococcus erythropolis and identified using standard NMR and MS methods. Screening of the twelve predominant human steroidal bile acid components revealed that a subset of these compounds can inhibit biofilm formation, induce detachment of preformed biofilms under static conditions, and that these compounds display distinct structure-activity relationships against V. cholerae and P. aeruginosa. Our findings highlight the significance of distinct bile acid components in the regulation of biofilm formation and dispersion in two different clinically relevant bacterial pathogens, and suggest that the bile acids, which are endogenous mammalian metabolites used to solubilize dietary fats, may also play a role in maintaining host health against bacterial infection.
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Tian Z, Cheng Q, Yoshimoto FK, Lei L, Lamb DC, Guengerich FP. Cytochrome P450 107U1 is required for sporulation and antibiotic production in Streptomyces coelicolor. Arch Biochem Biophys 2013; 530:101-7. [PMID: 23357279 PMCID: PMC3600146 DOI: 10.1016/j.abb.2013.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 01/02/2013] [Accepted: 01/04/2013] [Indexed: 11/15/2022]
Abstract
The filamentous bacterium Streptomyces coelicolor has a complex life cycle involving the formation of hair-like aerial mycelia on the colony surface, which differentiate into chains of spores. Genes required for the initiation of aerial mycelium formation have been termed 'bld' (bald), describing the smooth, undifferentiated colonies of mutant strains. We report the identification of a new bld gene designated as sco3099 and biochemical analysis of its encoded enzyme, cytochrome P450 (P450, or CYP) 107U1. Deletion of sco3099 resulted in a mutant defective in aerial hyphae sporulation and sensitive to heat shock, indicating that P450 107U1 plays a key role in growth and development of S. coelicolor. This is the first P450 reported to participate in a sporulation process in Streptomycetes. The substrate and catalytic properties of P450 107U1 were further investigated in mass spectrometry-based metabolomic studies. Glycocholic acid (from the medium) was identified as a substrate of P450 107U1 and was oxidized to glyco-7-oxo-deoxycholic acid. Although this reaction is apparently not relevant to the observed sporulation deficiency, it suggests that P450 107U1 might exert its physiological function by oxidizing other steroid-like molecules.
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Affiliation(s)
- Zhenghua Tian
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Qian Cheng
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Francis K. Yoshimoto
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Li Lei
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - David C. Lamb
- Institute of Life Science and Swansea Medical School, University of Wales, Swansea, SA2 8PP, UK
| | - F. Peter Guengerich
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Two new cholic acid derivatives from the marine ascidian-associated bacterium Hasllibacter halocynthiae. Molecules 2012; 17:12357-64. [PMID: 23090017 PMCID: PMC6268207 DOI: 10.3390/molecules171012357] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 10/08/2012] [Accepted: 10/17/2012] [Indexed: 11/26/2022] Open
Abstract
The investigation of secondary metabolites in liquid cultures of a recently discovered marine bacterium, Hasllibacter halocynthiae strain KME 002T, led to the isolation of two new cholic acid derivatives. The structures of these compounds were determined to be 3,3,12-trihydroxy-7-ketocholanic acid (1) and 3,3,12-trihydroxy-7-deoxycholanic acid (2) through HRFABMS and NMR data analyses.
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Kim SH, Yang HO, Shin YK, Kwon HC. Hasllibacter halocynthiae gen. nov., sp. nov., a nutriacholic acid-producing bacterium isolated from the marine ascidian Halocynthia roretzi. Int J Syst Evol Microbiol 2011; 62:624-631. [PMID: 21551335 DOI: 10.1099/ijs.0.028738-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-negative, aerobic, ovoid to rod-shaped bacterial strain, KME 002(T) was isolated from a marine ascidian, Halocynthia roretzi, off the coast of Gangneung, Korea. Phylogenetic analyses based on 16S rRNA gene sequences showed that this strain belonged to the family Rhodobacteraceae in the class Alphaproteobacteria and was closely related to the type strains of Dinoroseobacter shibae, Roseovarius crassostreae and Pseudoruegeria aquimaris with 95.0, 94.7 and 94.5% 16S rRNA gene sequence similarities, respectively. KME 002(T) was an obligately halophilic bacterium requiring 1 to 5% (w/v) NaCl, with an absolute requirement for magnesium chloride for growth. Cells were motile by means of a single polar flagellum and showed budding fission. The predominant cellular fatty acid of the isolate was C(18:1)ω7c and Q-10 was the major ubiquinone. The DNA G+C content of the strain was 71.6 mol%. The major secondary metabolites from cultures in liquid medium were cholic acid derivatives, including 3α,12α-hydroxy-3-keto-glycocholanic acid, 12-hydroxy-3-keto-glycocholanic acid, nutriacholic acid and deoxycholic acid. These characteristics determined in this polyphasic study suggest that strain KME 002(T) represents a novel species in a new genus of the family Rhodobacteraceae. The name Hasllibacter halocynthiae gen. nov., sp. nov. is proposed for this isolate, and the type strain is KME 002(T) (=JCM 16214(T)=KCCM 90082(T)).
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Affiliation(s)
- Sung Hun Kim
- Division of Applied Marine Biotechnology and Engineering, Faculty of Marine Bioscience and Technology, Gangneung-Wonju National University, Gangneung, 210-702, Republic of Korea
- Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
| | - Hyun Ok Yang
- Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
| | - Yun Kyung Shin
- Aquaculture Management Division, National Fisheries Research and Development Institute, Busan 619-705, Republic of Korea
| | - Hak Cheol Kwon
- Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
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Kim SH, Yang HO, Sohn YC, Kwon HC. Aeromicrobium halocynthiae sp. nov., a taurocholic acid-producing bacterium isolated from the marine ascidian Halocynthia roretzi. Int J Syst Evol Microbiol 2010; 60:2793-2798. [PMID: 20081024 DOI: 10.1099/ijs.0.016618-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A marine bacterium, strain KME 001(T), was isolated from the siphon tissue of a marine ascidian, Halocynthia roretzi, collected off the coast of Gangneung, Korea. Strain KME 001(T) was a Gram-positive, aerobic, non-spore-forming, rod-shaped and non-motile bacterium. Phylogenetic analysis using 16S rRNA gene sequences revealed that strain KME 001(T) clustered with the genus Aeromicrobium and was closely related to Aeromicrobium ginsengisoli, Aeromicrobium erythreum and Aeromicrobium ponti with 97.7, 97.6 and 97.5 % sequence similarities, respectively. The strain was capable of growth at a variety of temperatures (10-42°C) and over a broad pH range (5.0-10.0). NaCl was required for robust growth of the strain. The diagnostic diamino acid of the cell-wall peptidoglycan was ll-diaminopimelic acid. The predominant menaquinone was MK-9(H(4)). The predominant fatty acids were C(18 : 1)ω9c, C(16 : 0) and 10-methyl C(18 : 0). The DNA-DNA hybridization analyses showed that DNA-DNA relatedness values between strain KME 001(T) and its nearest neighbours, A. ginsengisoli KCTC 19207(T), A. erythreum KCCM 41104(T) and A. ponti KACC 20565(T), were 49.6, 57.1 and 63.5 %, respectively. The DNA G+C content of strain KME 001(T) was 75.9mol%. Chemical investigation of the liquid culture medium of strain KME 001(T) led to the isolation of taurocholic acid as a major secondary metabolite. On the basis of phylogenetic and phenotypic data, strain KME 001(T) is classified as representing a novel species of the genus Aeromicrobium, for which the name Aeromicrobium halocynthiae sp. nov. is proposed. The type strain is KME 001(T) (=JCM 15749(T)=KCCM 90079(T)).
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Affiliation(s)
- Sung Hun Kim
- Division of Applied Marine Biotechnology and Engineering, Faculty of Marine Bioscience and Technology, Gangneung-Wonju National University, Gangneung, 210-702, Republic of Korea.,Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
| | - Hyun Ok Yang
- Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
| | - Young Chang Sohn
- Division of Applied Marine Biotechnology and Engineering, Faculty of Marine Bioscience and Technology, Gangneung-Wonju National University, Gangneung, 210-702, Republic of Korea
| | - Hak Cheol Kwon
- Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea
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Zhang Y, Mu J, Gu X, Zhao C, Wang X, Xie Z. A marine sulfate-reducing bacterium producing multiple antibiotics: biological and chemical investigation. Mar Drugs 2009; 7:341-54. [PMID: 19841718 PMCID: PMC2763104 DOI: 10.3390/md7030341] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 07/17/2009] [Accepted: 07/20/2009] [Indexed: 11/16/2022] Open
Abstract
A marine sulfate-reducing bacterium SRB-22 was isolated by means of the agar shake dilution method and identified as Desulfovibrio desulfuricans by morphological, physiological and biochemical characteristics and 16S rDNA analysis. In the bioassay, its extract showed broad-spectrum antimicrobial activity using the paper disc agar diffusion method. This isolate showed a different antimicrobial profile than either ampicillin or nystatin and was found to produce at least eight antimicrobial components by bioautography. Suitable fermentation conditions for production of the active constituents were determined to be 28 day cultivation at 25 °C to 30 °C with a 10% inoculation ratio. Under these conditions, the SRB-22 was fermented, extracted and chemically investigated. So far an antimicrobial compound, mono-n-butyl phthalate, and an inactive compound, thymine, have been isolated and characterized.
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Affiliation(s)
- Yi Zhang
- Department of Biotechnology, School of Environmental and Chemical Engineering, Dalian Jiaotong University, 116028 Dalian, China.
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Li H, Shinde PB, Lee HJ, Yoo ES, Lee CO, Hong J, Choi SH, Jung JH. Bile acid derivatives from a sponge-associated bacterium Psychrobacter sp. Arch Pharm Res 2009; 32:857-62. [DOI: 10.1007/s12272-009-1607-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 05/25/2009] [Accepted: 06/09/2009] [Indexed: 11/24/2022]
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