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He JB, Wang Y, Zhang GH, Wang JA, Chen YS, Jia J, Lv XM, Ren FC, Chen B, Cao YR. Secondary metabolites from the Actinomadura sp. and their cytotoxic activity. Fitoterapia 2024; 173:105806. [PMID: 38181893 DOI: 10.1016/j.fitote.2023.105806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/07/2024]
Abstract
Actinomadura sp., which is usually found in muddy habitats, produces various secondary metabolites with biological activities. In this study, five new compounds named formosensin A (1), formosensin B (2), oxanthroquinone-3-O-α-d-mannose (8), oxanthromicin A (9), and oxanthromicin B (10) were isolated from the culture of Actinomadura sp. together with five known compounds (3-7). Their structures were elucidated by extensive spectroscopic methods including NMR and MS. In particular, the absolute configurations of compounds 1 and 2 were determined using computational methods. Moreover, compounds 1-2 and 8-10 were screened for cytotoxic activity using a panel of human tumor cell lines. Compound 9 induced significant cytotoxicity in five human tumor cell lines (HL-60, A-549, SMMC-7721, MCF-7, and SW480) with IC50 values of 8.7, 17.5, 15.0, 17.8, and 14.6 μM, respectively. These findings suggested that compound 9 could provide therapeutic benefits in the treatment of tumor-related diseases.
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Affiliation(s)
- Jiang-Bo He
- School of Medicine, Kunming University, Kunming 650214, PR China
| | - Ying Wang
- School of Medicine, Kunming University, Kunming 650214, PR China
| | - Gao-Hong Zhang
- School of Medicine, Kunming University, Kunming 650214, PR China
| | - Ji-Ai Wang
- School of Medicine, Kunming University, Kunming 650214, PR China
| | - Yi-Shu Chen
- Yunnan University of Traditional Chinese Medicine, Kunming 650500, PR China
| | - Jing Jia
- School of Medicine, Kunming University, Kunming 650214, PR China
| | - Xiao-Man Lv
- Yunnan University of Traditional Chinese Medicine, Kunming 650500, PR China
| | - Fu-Cai Ren
- School of Pharmacy, Anhui Medical University, Hefei 230032, PR China
| | - Bing Chen
- School of Medicine, Kunming University, Kunming 650214, PR China.
| | - Yan-Ru Cao
- School of Medicine, Kunming University, Kunming 650214, PR China.
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Ching KC, Chin EJ, Wibowo M, Tan ZY, Yang LK, Seow DC, Leong CY, Ng VW, Ng SB, Kanagasundaram Y. Antibacterial Spirotetronate Polyketides from an Actinomadura sp. Strain A30804. Molecules 2022; 27:molecules27238196. [PMID: 36500287 PMCID: PMC9737171 DOI: 10.3390/molecules27238196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 11/27/2022]
Abstract
Large scale cultivation and chemical investigation of an extract obtained from Actimonadura sp. resulted in the identification of six previously undescribed spirotetronates (pyrrolosporin B and decatromicins C-G; 7-12), along with six known congeners, namely decatromicins A-B (1-2), BE-45722B-D (3-5), and pyrrolosporin A (6). The chemical structures of compounds 1-12 were characterized via comparison with previously reported data and analysis of 1D/2D NMR and MS data. The structures of all new compounds were highly related to the spirotetronate type compounds, decatromicin and pyrrolosporin, with variations in the substituents on the pyrrole and aglycone moieties. All compounds were evaluated for antibacterial activity against the Gram-negative bacteria, Acinetobacter baumannii and Gram-positive bacteria, Staphylococcus aureus and were investigated for their cytotoxicity against the human cancer cell line A549. Of these, decatromicin B (2), BE-45722B (3), and pyrrolosporin B (7) exhibited potent antibacterial activities against both Gram-positive (MIC90 between 1-3 μM) and Gram-negative bacteria (MIC90 values ranging from 12-36 μM) with weak or no cytotoxic activity against A549 cells.
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Lee SR, Lee D, Yu JS, Benndorf R, Lee S, Lee DS, Huh J, de Beer ZW, Kim YH, Beemelmanns C, Kang KS, Kim KH. Natalenamides A⁻C, Cyclic Tripeptides from the Termite-Associated Actinomadura sp. RB99. Molecules 2018; 23:molecules23113003. [PMID: 30453579 PMCID: PMC6278286 DOI: 10.3390/molecules23113003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/11/2018] [Accepted: 11/12/2018] [Indexed: 11/16/2022] Open
Abstract
In recent years, investigations into the biochemistry of insect-associated bacteria have increased. When combined with analytical dereplication processes, these studies provide a powerful strategy to identify structurally and/or biologically novel compounds. Non-ribosomally synthesized cyclic peptides have a broad bioactivity spectrum with high medicinal potential. Here, we report the discovery of three new cyclic tripeptides: natalenamides A–C (compounds 1–3). These compounds were identified from the culture broth of the fungus-growing termite-associated Actinomadura sp. RB99 using a liquid chromatography (LC)/ultraviolet (UV)/mass spectrometry (MS)-based dereplication method. Chemical structures of the new compounds (1–3) were established by analysis of comprehensive spectroscopic methods, including one-dimensional (1H and 13C) and two-dimensional (1H-1H-COSY, HSQC, HMBC) nuclear magnetic resonance spectroscopy (NMR), together with high-resolution electrospray ionization mass spectrometry (HR-ESIMS) data. The absolute configurations of the new compounds were elucidated using Marfey’s analysis. Through several bioactivity tests for the tripeptides, we found that compound 3 exhibited significant inhibitory effects on 3-isobutyl-1-methylxanthine (IBMX)-induced melanin production. The effect of compound 3 was similar to that of kojic acid, a compound extensively used as a cosmetic material with a skin-whitening effect.
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Affiliation(s)
- Seoung Rak Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Dahae Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Jae Sik Yu
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - René Benndorf
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany.
| | - Sullim Lee
- College of Bio-Nano Technology, Gachon University, Seongnam 13120, Korea.
| | - Dong-Soo Lee
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Jungmoo Huh
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Gwanak-gu, Seoul 08826, Korea.
| | - Z Wilhelm de Beer
- Forestry and Agriculture Biotechnology Institute, University of Pretoria, Pretoria 0028, South Africa.
| | - Yong Ho Kim
- SKKU-Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Korea.
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany.
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
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Bhattacharjee K, Kumar S, Palepu NR, Patra PK, Rao KM, Joshi SR. Structure elucidation and in silico docking studies of a novel furopyrimidine antibiotics synthesized by endolithic bacterium Actinomadura sp. AL2. World J Microbiol Biotechnol 2017; 33:178. [PMID: 28932951 DOI: 10.1007/s11274-017-2343-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/16/2017] [Indexed: 12/11/2022]
Abstract
On screening of endolithic actinobacteria from a granite rock sample of Meghalaya for antibacterial compound, a novel antibacterial compound CCp1 was isolated from the fermentation broth of Actinomadura sp. AL2. On purification of the compound based on chromatographic techniques followed by characterization with FT-IR, UV-visible, 1H NMR, 13C NMR and mass spectrometry, the molecular formula of the compound was generated as C20H17N3O2, a furopyrimidine derivative. In vitro antibacterial activity of the compound was evaluated against both Gram positive and negative bacteria by agar well diffusion assay. The compound had lowest MIC (2.00 µg/ml) for Bacillus subtilis and highest MIC (> 64 µg/ml) for Staphylococcus epidermidis and Pseudomonas aeruginosa. The study revealed that the compound has potential antibacterial activity. The mode of action of the antibacterial compound was evaluated through in silico studies for its ability to bind DNA gyrase, 30S RNA molecules, OmpF porins and N-Acetylglucosamine-1-phosphate uridyltransferase (GlmU). The antibacterial compound demonstrated more favorable docking with DNA gyrase, 30S RNA molecules and OmpF porins than GlmU which support the antibacterial compound CCp1 can be as a promising broad spectrum antibiotic agent with "multitarget" characteristics.
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Affiliation(s)
- Kaushik Bhattacharjee
- Microbiology Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, 793022, India
| | - Shakti Kumar
- Bioinformatics Center (ICMR), Department of Biochemistry, Pt. Jawaharlal Nehru Memorial Medical College, Raipur, India
| | - Narasinga Rao Palepu
- Centre for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong, India
| | - Pradeep Kumar Patra
- Department of Biochemistry, Pt. Jawaharlal Nehru Memorial Medical College, Raipur, India
| | - Kollipara Mohan Rao
- Centre for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong, India
| | - Santa Ram Joshi
- Microbiology Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, 793022, India.
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Sriyapai P, Kawai F, Siripoke S, Chansiri K, Sriyapai T. Cloning, Expression and Characterization of a Thermostable Esterase HydS14 from Actinomadura sp. Strain S14 in Pichia pastoris. Int J Mol Sci 2015; 16:13579-94. [PMID: 26075873 PMCID: PMC4490510 DOI: 10.3390/ijms160613579] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/03/2015] [Accepted: 06/03/2015] [Indexed: 11/16/2022] Open
Abstract
A thermostable esterase gene (hydS14) was cloned from an Actinomadura sp. S14 gene library. The gene is 777 bp in length and encodes a polypeptide of 258 amino acid residues with no signal peptide, no N-glycosylation site and a predicted molecular mass of 26,604 Da. The encoded protein contains the pentapeptide motif (GYSLG) and catalytic triad (Ser88-Asp208-His235) of the esterase/lipase superfamily. The HydS14 sequence shows 46%-64% identity to 23 sequences from actinomycetes (23 α/β-hydrolases), has three conserved regions, and contains the novel motif (GY(F)SLG), which distinguishes it from other clusters in the α/β-hydrolase structural superfamily. A plasmid containing the coding region (pPICZαA-hydS14) was used to express HydS14 in Pichia pastoris under the control of the AOXI promoter. The recombinant HydS14 collected from the supernatant had a molecular mass of ~30 kDa, which agrees with its predicted molecular mass without N-glycosylation. HydS14 had an optimum temperature of approximately 70 °C and an optimum pH of 8.0. HydS14 was stable at 50 and 60 °C for 120 min, with residual activities of above 80% and above 90%, respectively, as well as 50% activity at pH 6.0-8.0 and pH 9.0, respectively. The enzyme showed higher activity with p-nitrophenyl-C2 and C4. The Km and Vmax values for p-nitrophenyl-C4 were 0.21 ± 0.02 mM and 37.07 ± 1.04 μmol/min/mg, respectively. The enzyme was active toward short-chain p-nitrophenyl ester (C2-C6), displaying optimal activity with p-nitrophenyl-C4 (Kcat/Km = 11.74 mM(-1) · S(-1)). In summary, HydS14 is a thermostable esterase from Actinomadura sp. S14 that has been cloned and expressed for the first time in Pichia pastoris.
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Affiliation(s)
- Pichapak Sriyapai
- Department of Biology, Faculty of Sciences, Srinakharinwirot University, Bangkok 10110, Thailand.
| | - Fusako Kawai
- Center for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Somjai Siripoke
- Innovative Learning Center, Srinakharinwirot University, Bangkok 10110, Thailand.
| | - Kosum Chansiri
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand.
| | - Thayat Sriyapai
- Faculty of Environmental Culture and Ecotourism, Srinakharinwirot University, Bangkok 10110, Thailand.
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