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Sakai K, Futamura Y, Nogawa T, Zhao Y, Koshino H, Osada H, Takahashi S. Production of Kinanthraquinone D with Antimalarial Activity by Heterologous Gene Expression and Biotransformation in Streptomyces lividans TK23. JOURNAL OF NATURAL PRODUCTS 2024. [PMID: 38412225 DOI: 10.1021/acs.jnatprod.3c01076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Two new compounds, kinanthraquinone C (1) and kinanthraquinone D (2), were isolated along with two known compounds, kinanthraquinone (3) and kinanthraquinone B (4), produced by the heterologous expression of the kiq biosynthetic gene cluster and its pathway-specific regulator, kiqA, in Streptomyces lividans TK23. The chemical structures of compounds 1 and 2 were determined using mass spectrometry and nuclear magnetic resonance analyses. To examine a biosynthetic pathway of compounds 1 and 2, incubation experiments were conducted using S. lividans TK23 to supply the compounds 3 and 4. These experiments indicated that compounds 3 and 4 were converted to compounds 2 and 1, respectively, by the endogenous enzymes of S. lividans TK23. Compounds 2, 3, and 4 had antimalarial activities at half-maximal inhibitory concentration values of 0.91, 1.2, and 15 μM, respectively, without cytotoxicity up to 30 μM.
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Affiliation(s)
- Katsuyuki Sakai
- Natural Product Biosynthesis Research Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yushi Futamura
- Chemical Resource Development Unit, REKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Toshihiko Nogawa
- Molecular Structure Characterization Unit, Technology Platform Division, REKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yuzhu Zhao
- Natural Product Biosynthesis Research Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University; Shimo-Okubo 255, Sakura-ku, Saitama-shi, Saitama 338-8570, Japan
| | - Hiroyuki Koshino
- Molecular Structure Characterization Unit, Technology Platform Division, REKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiroyuki Osada
- Chemical Resource Development Unit, REKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shunji Takahashi
- Natural Product Biosynthesis Research Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University; Shimo-Okubo 255, Sakura-ku, Saitama-shi, Saitama 338-8570, Japan
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6,9-Dihydroxytetrangulol, a novel angucyclinone antibiotic accumulated in kiqO gene disruptant in the biosynthesis of kinanthraquinone. J Antibiot (Tokyo) 2021; 74:593-595. [PMID: 34234285 DOI: 10.1038/s41429-021-00442-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 06/01/2021] [Accepted: 06/18/2021] [Indexed: 02/06/2023]
Abstract
A novel angucyclinone, 6,9-dihydroxytetrangulol, was isolated from Streptomyces lividans TK23 transformed with a kinanthraquinone biosynthetic gene cluster in which the kiqO gene was disrupted. The chemical structure was elucidated by spectroscopic analyses. It showed significant antibacterial activities with an IC50 value of 1.9 μM against Staphylococcus aureus and moderate anticancer activities against HL-60 cells.
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Takao R, Sakai K, Koshino H, Osada H, Takahashi S. Identification of the kinanthraquinone biosynthetic gene cluster by expression of an atypical response regulator. Biosci Biotechnol Biochem 2021; 85:714-721. [DOI: 10.1093/bbb/zbaa082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/29/2020] [Indexed: 01/15/2023]
Abstract
ABSTRACT
Recent advances in genome sequencing have revealed a variety of secondary metabolite biosynthetic gene clusters in actinomycetes. Understanding the biosynthetic mechanism controlling secondary metabolite production is important for utilizing these gene clusters. In this study, we focused on the kinanthraquinone biosynthetic gene cluster, which has not been identified yet in Streptomyces sp. SN-593. Based on chemical structure, 5 type II polyketide synthase gene clusters were listed from the genome sequence of Streptomyces sp. SN-593. Among them, a candidate gene cluster was selected by comparing the gene organization with grincamycin, which is synthesized through an intermediate similar to kinanthraquinone. We initially utilized a BAC library for subcloning the kiq gene cluster, performed heterologous expression in Streptomyces lividans TK23, and identified the production of kinanthraquinone and kinanthraquinone B. We also found that heterologous expression of kiqA, which belongs to the DNA-binding response regulator OmpR family, dramatically enhanced the production of kinanthraquinones.
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Affiliation(s)
- Risa Takao
- Graduate School of Science and Engineering, Saitama University, Sakura-ku, Saitama-shi, Saitama, Japan
- Natural Product Biosynthesis Research Unit, RIKEN Centre for Sustainable Resource Science, Wako, Saitama, Japan
| | - Katsuyuki Sakai
- Natural Product Biosynthesis Research Unit, RIKEN Centre for Sustainable Resource Science, Wako, Saitama, Japan
| | - Hiroyuki Koshino
- Molecular Structure Characterization Unit, Technology Platform Division, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Centre for Sustainable Resource Science, Wako, Saitama, Japan
| | - Shunji Takahashi
- Graduate School of Science and Engineering, Saitama University, Sakura-ku, Saitama-shi, Saitama, Japan
- Natural Product Biosynthesis Research Unit, RIKEN Centre for Sustainable Resource Science, Wako, Saitama, Japan
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Antibacterial and cytotoxic metabolites of termite-associated Streptomyces sp. BYF63. J Antibiot (Tokyo) 2020; 73:766-771. [PMID: 32533072 DOI: 10.1038/s41429-020-0334-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/12/2020] [Accepted: 05/12/2020] [Indexed: 12/17/2022]
Abstract
Four anthraquinone derivatives, termstrin A, B, C and D (1-4), were isolated and purified from termite-associated Streptomyces sp. BYF63. Their structures were elucidated on the basis of extensive spectroscopic analyses (HR-ESI-MS, 1D and 2D NMR). Compounds 1 and 4 were found to possess potent antibacterial activities against Staphylococcus aureus, with the zone of inhibition (ZOI) values of 12.85 and 11.17 mm, respectively, which were comparable to that of penicillin sodium with ZOI of 13.15 mm. Furthermore, metabolite 1 showed moderate cytotoxicities against melanoma cell line A375 and gastric cancer cell line MGC-803, with IC50 values of 22.76 and 36.65 μM, respectively, which were less than those of referenced adriamycin.
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