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Hu Z, Gu D, Skyrud W, Du Y, Zhai R, Wang J, Zhang W. Engineered Biosynthesis and Anticancer Studies of Ring-Expanded Antimycin-Type Depsipeptides. ACS Synth Biol 2024; 13:1562-1571. [PMID: 38679882 DOI: 10.1021/acssynbio.4c00193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Respirantins are 18-membered antimycin-type depsipeptides produced by Streptomyces sp. and Kitasatospora sp. These compounds have shown extraordinary anticancer activities against a panel of cancer cell lines with nanomolar levels of IC50 values. However, further investigation has been impeded by the low titers of the natural producers and the challenging chemical synthesis due to their structural complexity. The biosynthetic gene cluster (BGC) of respirantin was previously proposed based on a bioinformatic comparison of the four members of antimycin-type depsipeptides. In this study, we report the first successful reconstitution of respirantin in Streptomyces albus using a synthetic BGC. This heterologous system serves as an accessible platform for the production and diversification of respirantins. Through polyketide synthase pathway engineering, biocatalysis, and chemical derivatization, we generated nine respirantin compounds, including six new derivatives. Cytotoxicity screening against human MCF-7 and Hela cancer cell lines revealed a unique biphasic dose-response profile of respirantin. Furthermore, a structure-activity relationship study has elucidated the essential functional groups that contribute to its remarkable cytotoxicity. This work paves the way for respirantin-based anticancer drug discovery and development.
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Affiliation(s)
- Zhijuan Hu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- Center of Synthetic Biology and Integrated Bioengineering, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou 310024, China
| | - Di Gu
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Will Skyrud
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Yongle Du
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Rui Zhai
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Juan Wang
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Wenjun Zhang
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, California 94720, United States
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2
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Usuki Y, Tanaka Y, Morii M, Satoh T. Total synthesis of isoneoantimycin. Org Biomol Chem 2023; 21:2398-2404. [PMID: 36857695 DOI: 10.1039/d3ob00099k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Antimycins are one of the well-known antifungal metabolites produced by Streptomyces bacteria. Neoantimycin and its analogues, the ring-expanded antimycins featuring a 15-membered tetraester ring, have been shown to be effective regulators of the oncogenic proteins GRP78/BiP and K-Ras. Isoneoantimycin was isolated from Streptomyces fradiae IFO12773 (ISP 5063) as a minor metabolite during the fermentation of neoantimycin and is the first reported antibiotic of the antimycin family without the macrolide core. In this study, we explored the total synthesis and stereochemical assignment of isoneoantimycin as an approach to perform structure-activity studies on neoantimycins. Taking the neoantimycin biosynthesis pathway into account, we presumed that the stereochemistry of isoneoantimycin is the same as that of neoantimycin. The synthesis of our target molecule with the (1S,2R,5S,6S,14R,15R,17S) configuration has been achieved by using chiral-pool building blocks. A comparison of the spectroscopic data between the synthetic and natural samples verified our presumption of the stereochemistry of natural isoneoantimycin.
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Affiliation(s)
- Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Yuka Tanaka
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Miyu Morii
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
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3
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Zheng K, Shen D, Zhang B, Hong R. Stereodivergent Synthesis of Lankacyclinol and Its C2/C18-Congeners Enabled by a Bioinspired Mannich Reaction. J Org Chem 2020; 86:10991-11005. [DOI: 10.1021/acs.joc.0c02443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Defeng Shen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Bingbing Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People’s Republic of China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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4
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Seidel J, Miao Y, Porterfield W, Cai W, Zhu X, Kim SJ, Hu F, Bhattarai-Kline S, Min W, Zhang W. Structure-activity-distribution relationship study of anti-cancer antimycin-type depsipeptides. Chem Commun (Camb) 2019; 55:9379-9382. [PMID: 31317975 PMCID: PMC6675640 DOI: 10.1039/c9cc03051d] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Small-molecule natural products have been an essential source of pharmaceuticals to treat human diseases, but very little is known about their behavior inside dynamic, live human cells. Here, we demonstrate the first structure-activity-distribution relationship (SADR) study of complex natural products, the anti-cancer antimycin-type depsipeptides, using the emerging bioorthogonal Stimulated Raman Scattering (SRS) Microscopy. Our results show that the intracellular enrichment and distribution of these compounds are driven by their potency and specific protein targets, as well as the lipophilic nature of compounds.
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Affiliation(s)
- Jeremy Seidel
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Yupeng Miao
- Department of Chemistry, Columbia University, NY 10025, USA
| | - William Porterfield
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Wenlong Cai
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Xuejun Zhu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Seong-Jong Kim
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Fanghao Hu
- Department of Chemistry, Columbia University, NY 10025, USA
| | - Santi Bhattarai-Kline
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Wei Min
- Department of Chemistry, Columbia University, NY 10025, USA
| | - Wenjun Zhang
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
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5
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Hamada C, Usuki Y, Takeuchi D, Ogawa H, Abe R, Satoh T. Total Syntheses and Configuration Assignments of JBIR-06 and Related Depsipeptides. Org Lett 2019; 21:965-968. [DOI: 10.1021/acs.orglett.8b03944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chie Hamada
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Daiki Takeuchi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Hikaru Ogawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Ryota Abe
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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6
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Chojnacka MW, Batey RA. Total Synthesis of (+)-Prunustatin A: Utility of Organotrifluoroborate-Mediated Prenylation and Shiina MNBA Esterification and Macrolactonization To Avoid a Competing Thorpe–Ingold Effect Accelerated Transesterification. Org Lett 2018; 20:5671-5675. [DOI: 10.1021/acs.orglett.8b02396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maja W. Chojnacka
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada M5S 3H6
| | - Robert A. Batey
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada M5S 3H6
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7
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Manaviazar S, Nockemann P, Hale KJ. Total Synthesis of the GRP78-Downregulatory Macrolide (+)-Prunustatin A, the Immunosuppressant (+)-SW-163A, and a JBIR-04 Diastereoisomer That Confirms JBIR-04 Has Nonidentical Stereochemistry to (+)-Prunustatin A. Org Lett 2016; 18:2902-5. [DOI: 10.1021/acs.orglett.6b01235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soraya Manaviazar
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Peter Nockemann
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Karl J. Hale
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
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8
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Chevalier A, Zhang Y, Khdour OM, Hecht SM. Selective Functionalization of Antimycin A Through an N-Transacylation Reaction. Org Lett 2016; 18:2395-8. [DOI: 10.1021/acs.orglett.6b00882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arnaud Chevalier
- Biodesign Center for BioEnergetics
and School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Yanmin Zhang
- Biodesign Center for BioEnergetics
and School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Omar M. Khdour
- Biodesign Center for BioEnergetics
and School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Sidney M. Hecht
- Biodesign Center for BioEnergetics
and School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
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9
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Liu J, Zhu X, Kim SJ, Zhang W. Antimycin-type depsipeptides: discovery, biosynthesis, chemical synthesis, and bioactivities. Nat Prod Rep 2016; 33:1146-65. [DOI: 10.1039/c6np00004e] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review discusses the isolation, structural variation, biosynthesis, chemical synthesis, and biological activities of antimycin-type depsipeptides.
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Affiliation(s)
- Joyce Liu
- Department of Bioengineering
- University of California
- Berkeley
- USA
| | - Xuejun Zhu
- Department of Chemical and Biomolecular Engineering
- University of California
- Berkeley
- USA
| | - Seong Jong Kim
- Department of Chemical and Biomolecular Engineering
- University of California
- Berkeley
- USA
| | - Wenjun Zhang
- Department of Chemical and Biomolecular Engineering
- University of California
- Berkeley
- USA
- Physical Biosciences Division
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10
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Laha RM, Khamarui S, Manna SK, Maiti DK. In Situ Generated AgII-Catalyzed Selective Oxo-Esterification of Alkyne with Alcohol to α-Ketoester: Photophysical Study. Org Lett 2015; 18:144-7. [DOI: 10.1021/acs.orglett.5b03484] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Radha M. Laha
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Saikat Khamarui
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Saikat K. Manna
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Dilip K. Maiti
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
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11
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Affiliation(s)
- Hikaru Ogawa
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Hideo Iio
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Yoshinosuke Usuki
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
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12
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Affiliation(s)
- Yoshinosuke Usuki
- Division of Molecular Materials Science; Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
| | - Hikaru Ogawa
- Division of Molecular Materials Science; Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
| | - Ken-ichi Yoshida
- Division of Molecular Materials Science; Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
| | - Tomokazu Inaoka
- Division of Molecular Materials Science; Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
| | - Hideo Iio
- Division of Molecular Materials Science; Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
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13
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Ganesh Kumar M, Thombare VJ, Bhaisare RD, Adak A, Gopi HN. Synthesis of Tetrasubstituted Symmetrical Pyrazines from β-Keto γ-Amino Esters: A Mild Strategy for Self-Dimerization of Peptides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403237] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Janetzko J, Batey RA. Organoboron-Based Allylation Approach to the Total Synthesis of the Medium-Ring Dilactone (+)-Antimycin A1b. J Org Chem 2014; 79:7415-24. [DOI: 10.1021/jo501134d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John Janetzko
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S
3H6, Canada
| | - Robert A. Batey
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S
3H6, Canada
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15
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Beveridge RE, Batey RA. An Organotrifluoroborate-Based Convergent Total Synthesis of the Potent Cancer Cell Growth Inhibitory Depsipeptides Kitastatin and Respirantin. Org Lett 2014; 16:2322-5. [DOI: 10.1021/ol500484f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramsay E. Beveridge
- Davenport
Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada, M5S 3H6
| | - Robert A. Batey
- Davenport
Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada, M5S 3H6
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16
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Arsianti A, Fadilah &, Kusmardi &, Tanimoto H, Morimoto T, Kakiuchi K. Design and Molecular Docking Study of Antimycin A<sub>3</sub> Analogues as Inhibitors of Anti-Apoptotic Bcl-2 of Breast Cancer. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ojmc.2014.43006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Vanner SA, Li X, Zvanych R, Torchia J, Sang J, Andrews DW, Magarvey NA. Chemical and biosynthetic evolution of the antimycin-type depsipeptides. MOLECULAR BIOSYSTEMS 2013; 9:2712-9. [DOI: 10.1039/c3mb70219g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Arsianti A, Tanimoto H, Morimoto T, Bahtiar A, Takeya T, Kakiuchi K. Synthesis and anticancer activity of polyhydroxylated 18-membered analogue of antimycin A3. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.01.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Pettit GR, Mendonça RF, Knight JC, Pettit RK. The cephalostatins. 21. Synthesis of bis-steroidal pyrazine rhamnosides (1). JOURNAL OF NATURAL PRODUCTS 2011; 74:1922-30. [PMID: 21899266 PMCID: PMC3251514 DOI: 10.1021/np200411p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The synthesis of bis-steroidal pyrazines derived from 3-oxo-11,21-dihydroxypregna-4,17(20)-diene (4) and glycosylation of a D-ring side chain with α-L-rhamnose have been summarized. Rearrangement of steroidal pyrazine 10 to 14 was found to occur with boron triflouride etherate. Glycosylation of pyrazine 10 using 2,3,4-tri-O-acetyl-α-L-rhamnose iodide led to 1,2-orthoester-α-L-rhamnose pyrazine 17b. By use of a persilylated α-L-rhamnose iodide as donor, formation of the orthoester was avoided. Bis-steroidal pyrazine 10 and rhamnosides 17b and 21c were found to significantly inhibit cancer cell growth in a murine and human cancer cell line panel. Pyrazine 9 inhibited growth of the nosocomial pathogen Enterococcus faecalis.
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Affiliation(s)
- George R. Pettit
- Department of Chemistry and Biochemistry, Arizona State University, PO Box 871604, Tempe, Arizona 85287-1604
| | - Ricardo F. Mendonça
- Department of Chemistry and Biochemistry, Arizona State University, PO Box 871604, Tempe, Arizona 85287-1604
| | - John C. Knight
- Department of Chemistry and Biochemistry, Arizona State University, PO Box 871604, Tempe, Arizona 85287-1604
| | - Robin K. Pettit
- Department of Chemistry and Biochemistry, Arizona State University, PO Box 871604, Tempe, Arizona 85287-1604
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20
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Kutrzeba LM, Li XC, Ding Y, Ferreira D, Zjawiony JK. Intramolecular transacetylation in salvinorins D and E. JOURNAL OF NATURAL PRODUCTS 2010; 73:707-708. [PMID: 20337449 DOI: 10.1021/np900447w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Extraction of fresh Salvia divinorum leaves afforded salvinorins E and D as potential biosynthesis precursors of salvinorin A, a major metabolite and a potent hallucinogen. Attempts at HPLC purification of salvinorin E (2) with acetonitrile as a solvent revealed an equilibrium with its regioisomer, salvinorin D (3), in a 3:5 ratio. The presence of both compounds was readily observed in the (1)H NMR spectrum. This spontaneous formation of the mixture of isomers occurs via a dynamic intramolecular transacetylation process.
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Affiliation(s)
- Lukasz M Kutrzeba
- Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University, Mississippi 38677-1848, USA
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21
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Bandyopadhyay A, Agrawal N, Mali SM, Jadhav SV, Gopi HN. Tin(ii) chloride assisted synthesis of N-protected γ-amino β-keto esters through semipinacol rearrangement. Org Biomol Chem 2010; 8:4855-60. [DOI: 10.1039/c0ob00199f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Shiina I, Ushiyama H, Yamada YK, Kawakita YI, Nakata K. 4-(Dimethylamino)pyridineN-oxide (DMAPO): An Effective Nucleophilic Catalyst in the Peptide Coupling Reaction with 2-Methyl-6-nitrobenzoic Anhydride. Chem Asian J 2008; 3:454-61. [DOI: 10.1002/asia.200700305] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Total Synthesis of 2-Hydroxytetracosanolide and 2-Hydroxy-24-oxooctacosanolide By Using an Effective Lactonization. Chem Asian J 2008; 3:462-72. [DOI: 10.1002/asia.200700304] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Shiina I, Miyao R. 2,6-Dimethyl-4-nitrobenzoic Anhydride (DMNBA): An Effective Coupling Reagent for the Synthesis of Carboxylic Esters and Lactones. HETEROCYCLES 2008. [DOI: 10.3987/com-08-s(n)96] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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26
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Pettit GR, Tan R, Pettit RK, Smith TH, Feng S, Doubek DL, Richert L, Hamblin J, Weber C, Chapuis JC. Antineoplastic agents. 560. Isolation and structure of kitastatin 1 from an Alaskan Kitasatospora sp. JOURNAL OF NATURAL PRODUCTS 2007; 70:1069-72. [PMID: 17608530 PMCID: PMC2596607 DOI: 10.1021/np068072c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
By utilizing a bioassay-guided separation (P388 lymphocytic leukemia and a panel of human cancer cell lines) of fermentation broths from a Kitasatospora sp. collected from a tundra soil sample taken at the shore of the Beaufort Sea, we have isolated three powerful (GI50 to 0.0006 microg/mL) cancer cell growth inhibitors (1-3) and determined their structures to be closely related cyclodepsipeptides. From 380 L fermentations of Kitasatospora sp. were obtained 2.6 mg of a new cyclodepsipeptide designated kitastatin 1 (3), accompanied by the previously known respirantin (1, 10.8 mg) and its valeryl homologue (2, 4.8 mg). The structures were determined by employment of a series of high-resolution mass and 2D NMR spectroscopic analyses. The stereochemical assignments and overall structures were confirmed by subsequent total synthesis of depsipeptide 1, as reported in the accompanying contribution.
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Affiliation(s)
- George R Pettit
- Cancer Research Institute and Department of Chemistry and Biochemistry, Arizona State University, PO Box 872404, Tempe, Arizona 85287-2404, USA.
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