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Shi P, Wang Y, Liu M, Li Y, Zhu J, Shen Y, Wang H. Discovery and Heterologous Production of Tetrapetalones Provide Insights into the Formation of the Tetracyclic System. JOURNAL OF NATURAL PRODUCTS 2024; 87:98-103. [PMID: 38170464 DOI: 10.1021/acs.jnatprod.3c00813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Tetrapetalones make up a unique class of pentaketide ansamycins that feature a tetracyclic skeleton and exhibit potent inhibitory activities against soybean lipoxygenase. However, a detailed biosynthetic route to tetrapetalones has not been published. Herein we report the activation of the tetrapetalones' biosynthetic gene cluster (tpt) in Streptomyces sp. S10 by promoter engineering along with constitutive expression of pathway-specific regulator genes, leading to the discovery of seven new derivatives, tetrapetalones E-K (2-8), and the known tetrapetalone A (1). In vivo gene deletion experiments and heterologous expression of the minimized tpt cluster in Streptomyces albus J1074 suggest that the tetracyclic system of tetrapetalones is probably formed spontaneously, and the regioselective glycosylation of tetrapetalones at the C-9 hydroxy group with d-rhamnose or d-rhodinose was catalyzed by the glycosyltransferase Tpt14.
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Affiliation(s)
- Peng Shi
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Yu Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Mengyujie Liu
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Yaoyao Li
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Jing Zhu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Yuemao Shen
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Haoxin Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
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Zhang Y, Liao G, Wang M, Zhang Z, Liu L, Song Y, Wang D, Hao T, Feng J, Xia B, Wang Y, Tang X, Chen Y. Human-associated bacteria adopt an unusual route for synthesizing 3-acetylated tetramates for environmental adaptation. MICROBIOME 2023; 11:97. [PMID: 37147735 PMCID: PMC10161427 DOI: 10.1186/s40168-023-01548-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/11/2023] [Indexed: 05/07/2023]
Abstract
BACKGROUND Tetramates or tetramic acid-containing compounds (TACs) are a group of bioactive natural products featuring a pyrrolidine-2,4-dione ring acknowledged being closed via Dieckmann cyclization. The cariogenic Streptococcus mutans strains bearing a muc biosynthetic gene cluster (BGC) can synthesize mutanocyclin (MUC), a 3-acetylated TAC that can inhibit both leukocyte chemotaxis and filamentous development in Candida albicans. Some strains can also accumulate reutericyclins (RTCs), the intermediates of MUC biosynthesis with antibacterial activities. However, the formation mechanism of the pyrrolidine-2,4-dione ring of MUC and the distribution of muc-like BGCs along with their ecological functions has not been explored extensively. RESULTS We demonstrated that a key intermediate of MUC biosynthesis, M-307, is installed by a hybrid nonribosomal peptide synthetase-polyketide synthase assembly line and its pyrrolidine-2,4-dione ring is closed via an unprecedented lactam bond formation style. Subsequent C-3 acetylation will convert M-307 to RTCs, which is then hydrolyzed by a deacylase, MucF, to remove the N-1 fatty acyl appendage to generate MUC. Distribution analysis showed that the muc-like BGCs distribute predominantly in human-associated bacteria. Interestingly, most of the muc-like BGCs possessing a mucF gene were isolated from human or livestock directly, indicating their involvement in alleviating the host's immune attacks by synthesizing MUC; while those BGCs lacking mucF gene distribute mainly in bacteria from fermented products, suggesting that they tend to synthesize RTCs to compete with neighboring bacteria. It is noteworthy that many bacteria in the same habitats (e.g., the oral cavity) lack the muc-like BGC, but possess functional MucF homologues to "detoxify" RTCs to MUC, including several competitive bacteria of S. mutans. We also comparably studied the distribution of TAS1, a fungal enzyme responsible for the production of phytotoxic tenuazonic acids (TeAs), a class of 3-acetylated TACs with similar structure but distinct biosynthetic mechanism to MUC, and found that it mainly exists in plants or crops. CONCLUSIONS The in vivo and in vitro experiments revealed that the pyrrolidine-2,4-dione ring of MUC is closed via lactam bond formation, which may be adopted by many TACs without 3-acyl decorations. Besides, we found that muc-like BGCs are widespread in human-associated bacteria and their shapes and main products can be influenced by the habitat environment and vice versa. By comparing with TeAs, we provided thought-provoking insights into how ecological and evolutionary forces drive bacteria and fungi to construct a common 3-acetylated pyrrolidine-2,4-dione core through different routes, and how the biosynthetic processes are delicately controlled to generate diverse 3-acetylated TACs for environmental adaptation. Video Abstract.
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Affiliation(s)
- Yuwei Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ge Liao
- Institute of Chemical Biology, Shenzhen Bay Laboratory, 518132, Shenzhen, China
| | - Min Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, Guangdong, China
| | - Zhao Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, 100034, China
| | - Liwei Liu
- Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, China
| | - Yuqin Song
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Dacheng Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Tingting Hao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jie Feng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bin Xia
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Yixiang Wang
- Central Laboratory Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Xiaoyu Tang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, 518132, Shenzhen, China.
| | - Yihua Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Ahn HI, Park JU, Xuan Z, Kim JH. Pd-Catalyzed asymmetric [5 + 2] cycloaddition of vinylethylene carbonates and cyclic imines: access to N-fused 1,3-oxazepines. Org Biomol Chem 2020; 18:9826-9830. [DOI: 10.1039/d0ob02159h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile route to access enantioenriched N-fused 1,3-oxazepines via Pd-catalyzed asymmetric [5 + 2] cycloaddition of vinylethylene carbonates and cyclic imines has been developed.
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Affiliation(s)
- Hye-In Ahn
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Jong-Un Park
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Zi Xuan
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Ju Hyun Kim
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
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Dhanjee HH, Kobayashi Y, Buergler JF, McMahon TC, Haley MW, Howell JM, Fujiwara K, Wood JL. Total Syntheses of (+)- and (−)-Tetrapetalones A and C. J Am Chem Soc 2017; 139:14901-14904. [DOI: 10.1021/jacs.7b09358] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heemal H. Dhanjee
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Yutaka Kobayashi
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Jonas F. Buergler
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Travis C. McMahon
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Matthew W. Haley
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Jennifer M. Howell
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Koichi Fujiwara
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - John L. Wood
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
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Carlsen P, Jiang C, Herrick IR, Frontier AJ. Studies toward the AB ring system of the tetrapetalone natural products. Tetrahedron 2015; 71:5886-5896. [PMID: 26309334 DOI: 10.1016/j.tet.2015.05.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic efforts toward the rapid assembly of the AB ring system of the tetrapetalones is described. Key to this work was the use of [3+2] cycloaddition/oxidative extrusion methodology to furnish functionalized aryl enones. The Nazarov cyclization of these substrates was examined, and optimized to generate the AB ring carbon skeleton. Then, Pd-catalyzed cross-coupling were conducted, and conditions were identified that enabled installation of the requisite C14-N bond.
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Affiliation(s)
- Peter Carlsen
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
| | - Chao Jiang
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
| | - Ildiko R Herrick
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
| | - Alison J Frontier
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
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Li C, Li X, Hong R. Synthetic Study on Tetrapetalones: Stereoselective Cyclization of N-Acyliminium Ion To Construct Substituted 1-Benzazepines. Org Lett 2009; 11:4036-9. [DOI: 10.1021/ol901349b] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cheng Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China
| | - Xinyu Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China
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