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Ploypetch S, Luo X, Zhao S, Roytrakul S, Li L, Suriyaphol G. Salivary metabolomic identification of biomarker candidates for oral melanoma and oral squamous cell carcinoma in dogs. J Vet Intern Med 2024. [PMID: 38703129 DOI: 10.1111/jvim.17092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 04/18/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Oral melanoma (OM) and oral squamous cell carcinoma (OSCC) are frequently diagnosed in dogs, presenting a challenge in distinguishing them from benign oral tumors (BN). Salivary metabolomic biomarkers offer a practical solution because of saliva's direct contact with tumors and the noninvasive nature of collection. OBJECTIVE Assess the diversity and abundance of the salivary metabolome in dogs with BN, OM, and OSCC using amine/phenol submetabolome analysis and high-performance chemical isotope labeling liquid chromatography-mass spectrometry (CIL LC-MS). ANIMALS Study included 11 BN, 24 OM, 10 OSCC, and 20 healthy control dogs. METHODS Case-control cross-sectional study was conducted to assess salivary submetabolic profiles in dogs with BN, OM, and OSCC and healthy dogs. Samples were labeled with 12C-dansyl chloride and analyzed using CIL LC-MS targeted to amine- and phenol-containing metabolites for amine/phenol submetabolome analysis. RESULTS Distinct clusters and significant differences in metabolite concentrations were observed among the oral cancer, BN, and control groups. A total of 154 and 66 metabolites showed significantly altered concentrations, particularly in OM and OSCC, respectively, when compared with BN (Padj < .05). Potential metabolic biomarkers were identified for each cancer, including decreased concentrations of seryl-arginine and sarcosine in OSCC. Moreover, high-confidence putative metabolites were identified, including an increase in tryptophyl-threonine and a decrease in 1,2-dihydroxynapthalene-6-sulfonic acid and hydroxyprolyl-hydroxyproline for OM. CONCLUSIONS AND CLINICAL IMPORTANCE We identified high coverage of the amine/phenol submetabolome, including seryl-arginine, and sarcosine, in OSCC. Our findings emphasize the potential of these biomarkers for distinguishing between oral OSCC and BN in dogs.
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Affiliation(s)
- Sekkarin Ploypetch
- Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, Thailand
| | - Xian Luo
- The Metabolomics Innovation Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Shuang Zhao
- The Metabolomics Innovation Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Sittiruk Roytrakul
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
| | - Liang Li
- The Metabolomics Innovation Centre, University of Alberta, Edmonton, Alberta, Canada
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Gunnaporn Suriyaphol
- Biochemistry Unit, Department of Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence for Companion Animal Cancer, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
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Boruta T, Ścigaczewska A, Bizukojć M. Production of secondary metabolites in stirred tank bioreactor co-cultures of Streptomyces noursei and Aspergillus terreus. Front Bioeng Biotechnol 2022; 10:1011220. [PMID: 36246390 PMCID: PMC9557299 DOI: 10.3389/fbioe.2022.1011220] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
The focus of the study was to characterize the bioprocess kinetics and secondary metabolites production in the novel microbial co-cultivation system involving Streptomyces noursei ATCC 11455 (the producer of an antifungal substance known as nystatin) and Aspergillus terreus ATCC 20542 (the source of lovastatin, a cholesterol-lowering drug). The investigated “A. terreus vs. S. noursei” stirred tank bioreactor co-cultures allowed for the concurrent development and observable biosynthetic activity of both species. In total, the production profiles of 50 secondary metabolites were monitored over the course of the study. The co-cultures were found to be effective in terms of enhancing the biosynthesis of several metabolic products, including mevinolinic acid, an acidic form of lovastatin. This work provided a methodological example of assessing the activity of a given strain in the co-culture by using the substrates which can be metabolized exclusively by this strain. Since S. noursei was shown to be incapable of lactose utilization, the observed changes in lactose levels were attributed to A. terreus and thus confirmed its viability. The study was complemented with the comparative microscopic observations of filamentous morphologies exhibited in the co-cultures and corresponding monocultures.
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Nanjo T, Oshita T, Matsumoto A, Takemoto Y. Late‐Stage Installation of Dehydroamino Acid Motifs into Peptides Enabled by an
N
‐Chloropeptide Strategy. Chemistry 2022; 28:e202201120. [DOI: 10.1002/chem.202201120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Indexed: 12/31/2022]
Affiliation(s)
- Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences Kyoto University Sakyo-ku, Yoshida Kyoto 606-8501 Japan
| | - Takuma Oshita
- Graduate School of Pharmaceutical Sciences Kyoto University Sakyo-ku, Yoshida Kyoto 606-8501 Japan
| | - Ayaka Matsumoto
- Graduate School of Pharmaceutical Sciences Kyoto University Sakyo-ku, Yoshida Kyoto 606-8501 Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences Kyoto University Sakyo-ku, Yoshida Kyoto 606-8501 Japan
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Mikulski L, Schäfer J, Brockmeyer K, Kraut R, Li SM. Comparative studies on similarities and differences of cyclodipeptide oxidases for installation of C-C double bonds at the diketopiperazine ring. Appl Microbiol Biotechnol 2020; 104:2523-2536. [PMID: 31989220 PMCID: PMC7044140 DOI: 10.1007/s00253-020-10392-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 12/29/2019] [Accepted: 01/17/2020] [Indexed: 01/09/2023]
Abstract
Cyclodipeptide oxidases (CDOs) perform dehydrogenations on diketopiperazines and play an important role in the cyclodipeptide diversification. In this study, we investigated the two known CDOs AlbA/B and Ndas_1146/7 and one new member, CDO-Np. LC-MS monitoring of 32 cyclodipeptide biotransformations in E. coli revealed good consumption of cyclodipeptides containing aromatic amino acids. Cyclodipeptides consisting solely of aliphatic amino acids were poor substrates. In vitro assays of 34 substrates with crude enzyme extracts and product identification proved that the CDO-Np-containing extract catalyzes the formation of two C-C double bonds in many cases. The extracts containing the two other enzymes had lower activities and catalyzed mainly didehydrogenations. For didehydrogenation, the phenylalanyl or tyrosyl site was usually preferred. No or very low acceptance of benzodiazepinediones and a 2,6-diketopiperazine proved the importance of the 2,5-diketopiperazine ring. N-Methylation at the diketopiperazine ring or prenylation of the tryptophan-containing cyclodipeptides influences the enzyme activity and product spectrum. KEY POINTS: • Comparison of catalytic activities of three enzymes; Diverse cyclodipeptides and derivatives as substrates; Determination of double bond formation using2H-labeled substrates; Product identification also by interpretation of MS2fragmentation pattern.
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Affiliation(s)
- Lena Mikulski
- Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany
| | - Johanna Schäfer
- Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany
| | - Kirsten Brockmeyer
- Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany
| | - Rixa Kraut
- Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany
| | - Shu-Ming Li
- Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany.
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5
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Zhao P, Xue Y, Gao W, Li J, Zu X, Fu D, Feng S, Bai X, Zuo Y, Li P. Actinobacteria-Derived peptide antibiotics since 2000. Peptides 2018; 103:48-59. [PMID: 29567053 DOI: 10.1016/j.peptides.2018.03.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/16/2018] [Accepted: 03/18/2018] [Indexed: 11/23/2022]
Abstract
Members of the Actinobacteria, including Streptomyces spp., Kutzneria sp. Actinoplanes spp., Actinomycete sp., Nocardia sp., Brevibacteriumsp.,Actinomadura spp., Micromonospora sp., Amycolatopsis spp., Nonomuraea spp., Nocardiopsis spp., Marinactinospora sp., Rhodococcus sp., Lentzea sp., Actinokineospora sp., Planomonospora sp., Streptomonospora sp., and Microbacterium sp., are an important source of structurally diverse classes of short peptides of ∼30 residues or fewer that will likely play an important role in new antibiotic development and discovery. Additionally, many have unique structures that make them recalcitrant to traditional modes of drug resistance via novel mechanisms, and these are ideal therapeutic tools and potential alternatives to current antibiotics. The need for novel antibiotic is urgent, and this review summarizes 199 Actinobacteria compounds published since 2000, including 35 cyclic lipopeptides containing piperazic or pipecolic acids, eight aromatic peptides, five glycopeptides, 21 bicyclic peptides, 44 other cyclic lipopeptides, five linear lipopeptides, six 2,5-diketopiperazines, one dimeric peptide, four nucleosidyl peptides, two thioamide-containing peptides, 25 thiopeptides, nine lasso peptides, and 34 typical cyclic peptides. The current and potential therapeutic applications of these peptides, including their structure, antituberculotic, antibacterial, antifungal, antiviral, anti-brugia, anti-plasmodial, and anti-trypanosomal activities, are discussed.
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Affiliation(s)
- Pengchao Zhao
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yun Xue
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China.
| | - Weina Gao
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Jinghua Li
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xiangyang Zu
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Dongliao Fu
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Shuxiao Feng
- College of Chemical Engineering and Pharmacy, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xuefei Bai
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yanjun Zuo
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Ping Li
- College of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
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Abstract
This review covers the literature published in 2013 for marine natural products (MNPs), with 982 citations (644 for the period January to December 2013) 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 (1163 for 2013), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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7
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Jiang J, Ma Z, Castle SL. Bulky α,β-dehydroamino acids: their occurrence in nature, synthesis, and applications. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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8
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Giessen TW, Marahiel MA. The tRNA-dependent biosynthesis of modified cyclic dipeptides. Int J Mol Sci 2014; 15:14610-31. [PMID: 25196600 PMCID: PMC4159871 DOI: 10.3390/ijms150814610] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 08/01/2014] [Accepted: 08/18/2014] [Indexed: 01/28/2023] Open
Abstract
In recent years it has become apparent that aminoacyl-tRNAs are not only crucial components involved in protein biosynthesis, but are also used as substrates and amino acid donors in a variety of other important cellular processes, ranging from bacterial cell wall biosynthesis and lipid modification to protein turnover and secondary metabolite assembly. In this review, we focus on tRNA-dependent biosynthetic pathways that generate modified cyclic dipeptides (CDPs). The essential peptide bond-forming catalysts responsible for the initial generation of a CDP-scaffold are referred to as cyclodipeptide synthases (CDPSs) and use loaded tRNAs as their substrates. After initially discussing the phylogenetic distribution and organization of CDPS gene clusters, we will focus on structural and catalytic properties of CDPSs before turning to two recently characterized CDPS-dependent pathways that assemble modified CDPs. Finally, possible applications of CDPSs in the rational design of structural diversity using combinatorial biosynthesis will be discussed before concluding with a short outlook.
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Affiliation(s)
- Tobias W Giessen
- Department of Chemistry/Biochemistry and LOEWE Center for Synthetic Microbiology (SYNMIKRO), Philipps-University Marburg, Hans-Meerwein-Strasse-4, 35032 Marburg, Germany.
| | - Mohamed A Marahiel
- Department of Chemistry/Biochemistry and LOEWE Center for Synthetic Microbiology (SYNMIKRO), Philipps-University Marburg, Hans-Meerwein-Strasse-4, 35032 Marburg, Germany.
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9
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Analysis of the biosynthesis of antibacterial cyclic dipeptides in Nocardiopsis alba. Arch Microbiol 2014; 196:765-74. [PMID: 25048158 DOI: 10.1007/s00203-014-1015-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 03/10/2014] [Accepted: 07/11/2014] [Indexed: 01/14/2023]
Abstract
Nocardiopsis alba is frequently isolated from environment and has recently been suggested as a casual symbiotic actinobacterium of diverse invertebrates. Using activity-guided fractionation, we purified two antibacterial cyclic dipeptides, cyclo(ΔPhe-ΔLeu) (albonoursin) and cyclo(ΔmTyr-ΔLeu), from a culture of Nocardiopsis alba ATCC BAA-2165. Analysis of N. alba genome revealed genetic information similar to albonoursin biosynthetic gene cluster, albABC. An albABC gene deletion mutant of N. alba was generated. Liquid chromatography-mass spectrometry analysis showed that the mutant could not produce the cyclic dipeptides. Cyclic dipeptide production in the mutant was restored by genetic complementation with the albABC cloned in a native plasmid of Nocardiopsis. β-Glucuronidase reporter assays with a second mutant construct, in which albABC promoter is transcriptionally fused to the reporting gene gusA, indicated that albABC gene expression was subject to osmoregulation. The system presented will be used to study the metabolic and genetic control of cyclic dipeptide biosynthesis in Nocardiopsis.
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10
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Arunrattiyakorn P, Ikeda B, Nitoda T, Kanzaki H. Enzymatic Synthesis of Dehydroderivatives from Proline-Containing Cyclic Dipeptides and Their Effects toward Cell Division. Biosci Biotechnol Biochem 2014; 71:830-3. [PMID: 17341821 DOI: 10.1271/bbb.60651] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have previously isolated cyclo(L-Pro-L-Tyr) and cyclo(L-Phe-L-Pro) from an actinomycete by a novel enzymatic conversion-guided method. Their tetradehydro derivatives, cyclo(DeltaPro-DeltaTyr) and cyclo(DeltaPhe-DeltaPro), were enzymatically prepared. Neither of them inhibited cell division, in contrast to other tetradehydro cyclic dipeptides prepared previously. This result suggests that an NH proton in a diketopiperazine ring and/or conformation of the compound are important for the activity.
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Affiliation(s)
- Panarat Arunrattiyakorn
- Laboratory of Bioresources Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima-naku, Okayama, Japan
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11
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Wang P, Xi L, Liu P, Wang Y, Wang W, Huang Y, Zhu W. Diketopiperazine derivatives from the marine-derived actinomycete Streptomyces sp. FXJ7.328. Mar Drugs 2013; 11:1035-49. [PMID: 23538868 PMCID: PMC3705386 DOI: 10.3390/md11041035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 03/06/2013] [Accepted: 03/06/2013] [Indexed: 01/05/2023] Open
Abstract
Five new diketopiperazine derivatives, (3Z,6E)-1-N-methyl-3-benzylidene-6-(2S-methyl-3-hydroxypropylidene)piperazine-2,5-dione (1), (3Z,6E)-1-N-methyl-3-benzylidene-6-(2R-methyl-3-hydroxypropylidene)piperazine-2,5-dione (2), (3Z,6Z)-3-(4-hydroxybenzylidene)-6-isobutylidenepiperazine-2,5-dione (3), (3Z,6Z)-3-((1H-imidazol-5-yl)-methylene)-6-isobutylidenepiperazine-2,5-dione (4), and (3Z,6S)-3-benzylidene-6-(2S-but-2-yl)piperazine-2,5-dione (5), were isolated from the marine-derived actinomycete Streptomyces sp. FXJ7.328. The structures of 1–5 were determined by spectroscopic analysis, CD exciton chirality, the modified Mosher’s, Marfey’s and the C3 Marfey’s methods. Compound 3 showed modest antivirus activity against influenza A (H1N1) virus with an IC50 value of 41.5 ± 4.5 μM. In addition, compound 6 and 7 displayed potent anti-H1N1 activity with IC50 value of 28.9 ± 2.2 and 6.8 ± 1.5 μM, respectively. Due to the lack of corresponding data in the literature, the 13C NMR data of (3Z,6S)-3-benzylidene-6-isobutylpiperazine-2,5-dione (6) were also reported here for the first time.
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Affiliation(s)
- Pei Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (P.W.); (P.L.); (Y.W.); (W.W.)
| | - Lijun Xi
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; E-Mail:
| | - Peipei Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (P.W.); (P.L.); (Y.W.); (W.W.)
| | - Yi Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (P.W.); (P.L.); (Y.W.); (W.W.)
| | - Wei Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (P.W.); (P.L.); (Y.W.); (W.W.)
| | - Ying Huang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; E-Mail:
- Authors to whom correspondence should be addressed; E-Mail: (W.Z.); (Y.H.); Tel./Fax: +86-532-82031268 (W.Z.); +86-10-64807311 (Y.H.)
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (P.W.); (P.L.); (Y.W.); (W.W.)
- Authors to whom correspondence should be addressed; E-Mail: (W.Z.); (Y.H.); Tel./Fax: +86-532-82031268 (W.Z.); +86-10-64807311 (Y.H.)
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Borthwick AD. 2,5-Diketopiperazines: synthesis, reactions, medicinal chemistry, and bioactive natural products. Chem Rev 2012; 112:3641-716. [PMID: 22575049 DOI: 10.1021/cr200398y] [Citation(s) in RCA: 601] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Belin P, Moutiez M, Lautru S, Seguin J, Pernodet JL, Gondry M. The nonribosomal synthesis of diketopiperazines in tRNA-dependent cyclodipeptide synthase pathways. Nat Prod Rep 2012; 29:961-79. [DOI: 10.1039/c2np20010d] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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El-Gendy MMA, El-Bondkly AMA. Genome shuffling of marine derived bacterium Nocardia sp. ALAA 2000 for improved ayamycin production. Antonie van Leeuwenhoek 2011; 99:773-80. [PMID: 21240675 DOI: 10.1007/s10482-011-9551-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Accepted: 01/04/2011] [Indexed: 11/29/2022]
Abstract
Genome shuffling is a recent development in microbiology. The advantage of this technique is that genetic changes can be made in a microorganism without knowing its genetic background. Genome shuffling was applied to the marine derived bacterium Nocardia sp. ALAA 2000 to achieve rapid improvement of ayamycin production. The initial mutant population was generated by treatment with ethyl methane sulfonate (EMS) combined with UV irradiation of the spores, resulting in an improved population (AL/11, AL/136, AL/213 and AL/277) producing tenfold (150 μg/ml) more ayamycin than the original strain. These mutants were used as the starting strains for three rounds of genome shuffling and after each round improved strains were screened and selected based on their ayamycin productivity. The population after three rounds of genome shuffling exhibited an improved ayamycin yield. Strain F3/22 yielded 285 μg/ml of ayamycin, which was 19-fold higher than that of the initial strain and 1.9-fold higher than the mutants used as the starting point for genome shuffling. We evaluated the genetic effect of UV + EMS-mutagenesis and three rounds of genome shuffling on the nucleotide sequence by random amplified polymorphic DNA (RAPD) analysis. Many differences were noticed in mutant and recombinant strains compared to the wild type strain. These differences in RAPD profiles confirmed the presence of genetic variations in the Nocardia genome after mutagenesis and genome shuffling.
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Affiliation(s)
- Mervat M A El-Gendy
- Department of Chemistry of Natural and Microbial Products, National Research Centre, Dokki, Giza, Egypt
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15
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Schneemann I, Ohlendorf B, Zinecker H, Nagel K, Wiese J, Imhoff JF. Nocapyrones A-D, gamma-pyrones from a Nocardiopsis strain isolated from the marine sponge Halichondria panicea. JOURNAL OF NATURAL PRODUCTS 2010; 73:1444-1447. [PMID: 20695474 DOI: 10.1021/np100312f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Four new gamma-pyrones, nocapyrones A-D (1-4), were isolated from an organic extract of the Nocardiopsis strain HB383, which was isolated from the marine sponge Halichondria panicea. These are the first gamma-pyrones reported from a Nocardiopsis strain. The structures were elucidated on the basis of one- and two-dimensional NMR experiments and supported by HPLC-UV/MS and HRESIMS analyses. The biosynthesis of nocapyrone A was investigated by feeding experiments with (13)C-labeled compounds. In addition, one diketopiperazine, which was only known as a synthetic compound before, was isolated. The bioactivies of 1, 2, and the diketopiperazine were evaluated in a panel of assays.
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Affiliation(s)
- Imke Schneemann
- Kieler Wirkstoff-Zentrum (KiWiZ) at the Leibniz-Institute of Marine Sciences (IFM-GEOMAR), Am Kiel-Kanal 44, 24106 Kiel, Germany
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16
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17
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Novel Bioactive Metabolites from a Marine Derived Bacterium Nocardia sp. ALAA 2000. J Antibiot (Tokyo) 2008; 61:379-86. [DOI: 10.1038/ja.2008.53] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Huang YF, Tian L, Hua HM, Pei YH. Two diketopiperazines from marine fungus Gliocladium sp. YUP08. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2007; 9:197-201. [PMID: 17566910 DOI: 10.1080/10286020500531878] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two new diketopiperazines, PJ147 (1) and PJ157 (2), were isolated from the mycelium of a fungus, Gliocladium sp. YUP08, which was separated from sea mud collected in Rushan, Shandong, China. Their structures were elucidated by spectroscopical and chemical methods.
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Affiliation(s)
- Y-F Huang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
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19
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Arunrattiyakorn P, Nitoda T, Kanzaki H. Enzymatic conversion-based method for screening cyclic dipeptide-producing microbes. Peptides 2006; 27:633-9. [PMID: 16226343 DOI: 10.1016/j.peptides.2005.08.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2005] [Revised: 08/31/2005] [Accepted: 08/31/2005] [Indexed: 11/19/2022]
Abstract
We developed a method for screening cyclic dipeptide-producing microbes by enzymatic conversion. In this method, cyclic dipeptides are detected by the combination of: (i) conversion of cyclic dipeptides to dehydro cyclic dipeptides by cyclo(Leu-Phe) oxidase and (ii) detection of the dehydro derivative by UV spectrophotometry using TLC or HPLC analysis based on the absorbance change caused by the conversion. Using this method, the actinomycete strain A8 was isolated as a cyclic dipeptide-producing strain. The cyclic dipeptides were purified from the microbial extract by enzymatic detection-guided fractionation, and their structures were determined to be cyclo(L-Phe-L-Pro) and cyclo(L-Pro-L-Tyr) by spectroscopic methods.
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Affiliation(s)
- Panarat Arunrattiyakorn
- Graduate School of Natural Science & Technology, Okayama University, Tsushima-naka, Okayama 700-8530, Japan
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