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Sakabe T, Shimomura S, Ogura Y, Okubo KI, Yamashita H, Suzuki H, Tanida J. Spatial-photonic Ising machine by space-division multiplexing with physically tunable coefficients of a multi-component model. Opt Express 2023; 31:44127-44138. [PMID: 38178491 DOI: 10.1364/oe.508069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/04/2023] [Indexed: 01/06/2024]
Abstract
This paper proposes a space-division multiplexed spatial-photonic Ising machine (SDM-SPIM) that physically calculates the weighted sum of the Ising Hamiltonians for individual components in a multi-component model. Space-division multiplexing enables tuning a set of weight coefficients as an optical parameter and obtaining the desired Ising Hamiltonian at a time. We solved knapsack problems to verify the system's validity, demonstrating that optical parameters impact the search property. We also investigated a new dynamic coefficient search algorithm to enhance search performance. The SDM-SPIM would physically calculate the Hamiltonian and a part of the optimization with an electronics process.
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Hibi G, Shiraishi T, Umemura T, Nemoto K, Ogura Y, Nishiyama M, Kuzuyama T. Discovery of type II polyketide synthase-like enzymes for the biosynthesis of cispentacin. Nat Commun 2023; 14:8065. [PMID: 38052796 DOI: 10.1038/s41467-023-43731-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 11/18/2023] [Indexed: 12/07/2023] Open
Abstract
Type II polyketide synthases (PKSs) normally synthesize polycyclic aromatic compounds in nature, and the potential to elaborate further diverse skeletons was recently revealed by the discovery of a polyene subgroup. Here, we show a type II PKS machinery for the biosynthesis of a five-membered nonaromatic skeleton contained in the nonproteinogenic amino acid cispentacin and the plant toxin coronatine. We successfully produce cispentacin in a heterologous host and reconstruct its biosynthesis using seven recombinant proteins in vitro. Biochemical analyses of each protein reveal the unique enzymatic reactions, indicating that a heterodimer of type II PKS-like enzymes (AmcF-AmcG) catalyzes a single C2 elongation as well as a subsequent cyclization on the acyl carrier protein (AmcB) to form a key intermediate with a five-membered ring. The subsequent reactions, which are catalyzed by a collection of type II PKS-like enzymes, are also peculiar. This work further expands the definition of type II PKS and illuminates an unexplored genetic resource for natural products.
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Affiliation(s)
- Genki Hibi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Taro Shiraishi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Tatsuki Umemura
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Kenji Nemoto
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Yusuke Ogura
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Makoto Nishiyama
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Tomohisa Kuzuyama
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
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Takeuchi M, Miyoshi H, Semba Y, Yamada K, Nakashima K, Sato K, Furuta T, Moritsubo M, Ogura Y, Tanaka K, Imamoto T, Arakawa F, Kohno K, Ohshima K. Co-stimulatory and immune checkpoint molecules are important in the tumor microenvironment of Hodgkin-like adult T-cell leukemia/lymphoma. Haematologica 2023; 108:3496-3501. [PMID: 37439334 PMCID: PMC10690911 DOI: 10.3324/haematol.2023.283163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/30/2023] [Indexed: 07/14/2023] Open
Abstract
Not available.
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Affiliation(s)
- Mai Takeuchi
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Hiroaki Miyoshi
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Yuichiro Semba
- Department of Medicine and Biosystemic Science, Kyusyu University Faculty of Medicine, Fukuoka city, Fukuoka
| | - Kyohei Yamada
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Kazutaka Nakashima
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Kensaku Sato
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Takuya Furuta
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Mayuko Moritsubo
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Yusuke Ogura
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Ken Tanaka
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Teppei Imamoto
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Fumiko Arakawa
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Kei Kohno
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka
| | - Koichi Ohshima
- Department of Pathology, Kurume University School of Medicine, Kurume city, Fukuoka.
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Nemoto K, Takikawa H, Ogura Y. Syntheses of (+)-costic acid and structurally related eudesmane sesquiterpenoids and their biological evaluations as acaricidal agents against Varroa destructor. J Pestic Sci 2023; 48:111-115. [PMID: 37745169 PMCID: PMC10513954 DOI: 10.1584/jpestics.d23-029] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 07/06/2023] [Indexed: 09/26/2023]
Abstract
Synthesis of (+)-costic acid, isolated from Dittrichia viscosa (L.) W. Greuter as a natural acaricidal sesquiterpenoid, was achieved in 16 steps from (R)-carvone with an overall yield of 4.8%, involving the radical cyclization of selenoester to construct a decalone framework as the key step. Other structurally related natural products, (+)-costal, (+)-costol, and (+)-β-selinene, were also synthesized. The acaricidal activities of these four natural products and some synthetic intermediates were also evaluated against Varroa destructor. Among them, (+)-costal especially exhibited potent acaricidal activity.
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Affiliation(s)
- Kenji Nemoto
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Yamashita H, Okubo KI, Shimomura S, Ogura Y, Tanida J, Suzuki H. Low-Rank Combinatorial Optimization and Statistical Learning by Spatial Photonic Ising Machine. Phys Rev Lett 2023; 131:063801. [PMID: 37625069 DOI: 10.1103/physrevlett.131.063801] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/09/2023] [Accepted: 07/10/2023] [Indexed: 08/27/2023]
Abstract
The spatial photonic Ising machine (SPIM) [13D. Pierangeli et al., Large-Scale Photonic Ising Machine by Spatial Light Modulation, Phys. Rev. Lett. 122, 213902 (2019).PRLTAO0031-900710.1103/PhysRevLett.122.213902] is a promising optical architecture utilizing spatial light modulation for solving large-scale combinatorial optimization problems efficiently. The primitive version of the SPIM, however, can accommodate Ising problems with only rank-one interaction matrices. In this Letter, we propose a new computing model for the SPIM that can accommodate any Ising problem without changing its optical implementation. The proposed model is particularly efficient for Ising problems with low-rank interaction matrices, such as knapsack problems. Moreover, it acquires the learning ability of Boltzmann machines. We demonstrate that learning, classification, and sampling of the MNIST handwritten digit images are achieved efficiently using the model with low-rank interactions. Thus, the proposed model exhibits higher practical applicability to various problems of combinatorial optimization and statistical learning, without losing the scalability inherent in the SPIM architecture.
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Affiliation(s)
- Hiroshi Yamashita
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
| | - Ken-Ichi Okubo
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
| | - Suguru Shimomura
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
| | - Yusuke Ogura
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
| | - Jun Tanida
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
| | - Hideyuki Suzuki
- Graduate School of Information Science and Technology, Osaka University, Osaka 565-0871, Japan
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Takeuchi M, Miyoshi H, Semba Y, Yamada K, Nakashima K, Sato K, Furuta T, Moritsubo M, Ogura Y, Tanaka K, Imamoto T, Arakawa F, Kohno K, Ohshima K. Digital spatial profiling of CD4 + T cells in classic Hodgkin lymphoma. Virchows Arch 2023; 483:255-260. [PMID: 37270432 DOI: 10.1007/s00428-023-03562-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 05/06/2023] [Accepted: 05/13/2023] [Indexed: 06/05/2023]
Abstract
Classic Hodgkin lymphoma (CHL) harbors a small number of Hodgkin-Reed-Sternberg (HRS) cells scattered among numerous lymphocytes. HRS cells are surrounded by distinct CD4+ T cells in a rosette-like manner. These CD4+ T cell rosettes play an important role in the tumor microenvironment (TME) of CHL. To elucidate the interaction between HRS cells and CD4+ T cell rosettes, we completed digital spatial profiling to compare the gene expression profiles of CD4+ T cell rosettes and other CD4+ T cells separated from the HRS cells. Immune checkpoint molecules including OX40, programed cell death-1 (PD-1), and cytotoxic T lymphocyte associated protein 4 (CTLA-4) expression was higher in CD4+ T cell rosettes compared to other CD4+ T cells. Immunohistochemistry confirmed variable PD-1, CTLA-4, and OX40 expression in the CD4+ T cell rosettes. This study introduced a new pathological approach to study the CHL TME, and provided deeper insight into CD4+ T cells in CHL.
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Affiliation(s)
- Mai Takeuchi
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Hiroaki Miyoshi
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Yuichiro Semba
- Department of Medicine and Biosystemic Science, Kyusyu University Faculty of Medicine, Fukuoka City, Fukuoka, Japan
| | - Kyohei Yamada
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Kazutaka Nakashima
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Kensaku Sato
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Takuya Furuta
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Mayuko Moritsubo
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Yusuke Ogura
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Ken Tanaka
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Teppei Imamoto
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Fumiko Arakawa
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Kei Kohno
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan
| | - Koichi Ohshima
- Department of Pathology, Kurume University School of Medicine, Kurume City, Fukuoka, Japan.
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Hashimoto N, Takagi Y, Masuda H, Miyoshi H, Kohno K, Nagaishi M, Sato K, Takeuchi M, Furuta T, Kawamoto K, Yamada K, Moritsubo M, Inoue K, Shimasaki Y, Ogura Y, Imamoto T, Mishina T, Tanaka K, Kawaguchi Y, Nakamura S, Ohshima K, Hontani H, Takeuchi I. Case-based similar image retrieval for weakly annotated large histopathological images of malignant lymphoma using deep metric learning. Med Image Anal 2023; 85:102752. [PMID: 36716701 DOI: 10.1016/j.media.2023.102752] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 07/06/2021] [Revised: 12/29/2022] [Accepted: 01/18/2023] [Indexed: 01/26/2023]
Abstract
In the present study, we propose a novel case-based similar image retrieval (SIR) method for hematoxylin and eosin (H&E) stained histopathological images of malignant lymphoma. When a whole slide image (WSI) is used as an input query, it is desirable to be able to retrieve similar cases by focusing on image patches in pathologically important regions such as tumor cells. To address this problem, we employ attention-based multiple instance learning, which enables us to focus on tumor-specific regions when the similarity between cases is computed. Moreover, we employ contrastive distance metric learning to incorporate immunohistochemical (IHC) staining patterns as useful supervised information for defining appropriate similarity between heterogeneous malignant lymphoma cases. In the experiment with 249 malignant lymphoma patients, we confirmed that the proposed method exhibited higher evaluation measures than the baseline case-based SIR methods. Furthermore, the subjective evaluation by pathologists revealed that our similarity measure using IHC staining patterns is appropriate for representing the similarity of H&E stained tissue images for malignant lymphoma.
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Affiliation(s)
- Noriaki Hashimoto
- RIKEN Center for Advanced Intelligence Project, 1-4-1 Nihonbashi, Chuo-ku, Tokyo 103-0027, Japan
| | - Yusuke Takagi
- Department of Computer Science, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Hiroki Masuda
- Department of Computer Science, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Hiroaki Miyoshi
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Kei Kohno
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Miharu Nagaishi
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Kensaku Sato
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Mai Takeuchi
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Takuya Furuta
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Keisuke Kawamoto
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Kyohei Yamada
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Mayuko Moritsubo
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Kanako Inoue
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Yasumasa Shimasaki
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Yusuke Ogura
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Teppei Imamoto
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Tatsuzo Mishina
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Ken Tanaka
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Yoshino Kawaguchi
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Shigeo Nakamura
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan
| | - Koichi Ohshima
- Department of Pathology, Kurume University School of Medicine, 67 Asahimachi, Kurume 830-0011, Japan
| | - Hidekata Hontani
- Department of Computer Science, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Ichiro Takeuchi
- RIKEN Center for Advanced Intelligence Project, 1-4-1 Nihonbashi, Chuo-ku, Tokyo 103-0027, Japan; Department of Mechanical Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Inori Y, Takikawa H, Ogura Y. New synthesis of (±)-karanone, an important aroma compound in agarwood. Biosci Biotechnol Biochem 2023; 87:371-377. [PMID: 36702511 DOI: 10.1093/bbb/zbad009] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 01/18/2023] [Indexed: 01/28/2023]
Abstract
A concise synthesis of (±)-karanone, an important aroma compound of agarwood, was achieved from a commercially available 3-methylcyclohex-2-enol in 3.5% yield in 11 steps. The two contiguous stereocenters at C4 and C5 were constructed via Ireland-Claisen rearrangement. The allylic oxidation at C8 was successfully performed with the mixture of tert-butyl hydroperoxide (TBHP) and CuI. A precursor of ring-closing metathesis to construct a bicyclic dienone was efficiently synthesized from iodoenone by 1,4-addition and nucleophilic substitution of the vinyl group in one pot.
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Affiliation(s)
- Yuta Inori
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
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Mohri T, Kuwahara S, Ogura Y. Synthetic Studies of Bioactive Oxacyclic Natural Products. J SYN ORG CHEM JPN 2023. [DOI: 10.5059/yukigoseikyokaishi.81.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
| | | | - Yusuke Ogura
- Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Zhu Y, Shiraishi T, Lin J, Inaba K, Ito A, Ogura Y, Nishiyama M, Kuzuyama T. Complete Biosynthetic Pathway of the Phosphonate Phosphonothrixin: Two Distinct Thiamine Diphosphate-Dependent Enzymes Divide the Work to Form a C-C Bond. J Am Chem Soc 2022; 144:16715-16719. [PMID: 36067081 DOI: 10.1021/jacs.2c06546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phosphonates often exhibit biological activities by mimicking the phosphates and carboxylates of biological molecules. The phosphonate phosphonothrixin (PTX), produced by the soil-dwelling bacterium Saccharothrix sp. ST-888, exhibits herbicidal activity. In this study, we propose a complete biosynthetic pathway for PTX by reconstituting its biosynthesis in vitro. Our intensive analysis demonstrated that two dehydrogenases together reduce phosphonopyruvate (PnPy) to 2-hydroxy-3-phosphonopropanoic acid (HPPA) to accelerate the thermodynamically unfavorable rearrangement of phosphoenolpyruvate (PEP) to PnPy. The next four enzymes convert HPPA to (3-hydroxy-2-oxopropyl)phosphonic acid (HOPA). In the final stage of PTX biosynthesis, the "split-gene" transketolase homologue, PtxB5/6, catalyzes the transfer of a two-carbon unit attached to the thiamine diphosphate (TPP) cofactor (provided by the acetohydroxyacid synthase homologue, PtxB7) to HOPA to produce PTX. This study reveals a unique C-C bond formation in which two distinct TPP-dependent enzymes, PtxB5/6 and PtxB7, divide the work to transfer an acetyl group, highlighting an unprecedented biosynthetic strategy for natural products.
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Affiliation(s)
- Yuxun Zhu
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Taro Shiraishi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Jianwen Lin
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Keito Inaba
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Atsuro Ito
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yusuke Ogura
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Makoto Nishiyama
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Tomohisa Kuzuyama
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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11
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Ogura Y. Total Syntheses of Dihydro-β-agarofuran Natural Products. Biosci Biotechnol Biochem 2022; 86:985-997. [PMID: 35580581 DOI: 10.1093/bbb/zbac072] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/12/2022] [Indexed: 11/13/2022]
Abstract
Dihydro-β-agarofuran sesquiterpenoids constitute a large family of natural products characterized by a tricyclic architecture comprising trans-decalin and tetrahydrofuran rings, and oxygen functionalities on them. Their pharmacologically and agriculturally important biological properties and intriguing molecular architectures have attracted considerable attention from synthetic organic and medicinal chemists. In 2020, our group achieved a scalable total synthesis of this type of natural product, (-)-isocelorbicol, by developing a highly stereocontrolled protocol, which enabled elaboration to naturally occurring ester derivatives, celafolins B-1, B-2, and B-3. Afterward, the total syntheses of more complex dihydro-β-agarofuran sesquiterpenoids, (-)-euonyminol and (-)-euonymine, were reported by two research groups via current state-of-the-art methods. This review summarizes the total syntheses of dihydro-β-agarofuran natural products from 1979 to 2021.
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Affiliation(s)
- Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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12
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Tate N, Miyata Y, Sakai SI, Nakamura A, Shimomura S, Nishimura T, Kozuka J, Ogura Y, Tanida J. Quantitative analysis of nonlinear optical input/output of a quantum-dot network based on the echo state property. Opt Express 2022; 30:14669-14676. [PMID: 35473206 DOI: 10.1364/oe.450132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
The echo state property, which is related to the dynamics of a neural network excited by input driving signals, is one of the well-known fundamental properties of recurrent neural networks. During the echo state, the neural network reveals an internal memory function that enables it to remember past inputs. Due to the echo state property, the neural network will asymptotically update its condition from the initial condition and is expected to exhibit temporally nonlinear input/output. As a physical neural network, we fabricated a quantum-dot network that is driven by sequential optical-pulse inputs and reveals corresponding outputs, by random dispersion of quantum-dots as its components. In the network, the localized optical energy of excited quantum-dots is allowed to transfer to neighboring quantum-dots, and its stagnation time due to multi-step transfers corresponds to the hold time of the echo state of the network. From the experimental results of photon counting of the fluorescence outputs, we observed nonlinear optical input/output of the quantum-dot network due to its echo state property. Its nonlinearity was quantitatively verified by a correlation analysis. As a result, the relation between the nonlinear input/outputs and the individual compositions of the quantum-dot network was clarified.
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13
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Fujita T, Lin J, Kimishima A, Arai M, Takikawa H, Ogura Y. Synthesis and biological evaluation of cajaninstilbene acid and amorfrutins A-D as cytotoxic agents against human pancreatic carcinoma PANC-1 cells. Biosci Biotechnol Biochem 2022; 86:590-595. [PMID: 35157035 DOI: 10.1093/bbb/zbac025] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/10/2022] [Indexed: 11/13/2022]
Abstract
A concise synthesis of cajaninstilbene acid was achieved in 7 steps from (E)-3,5-dimethoxystilbene in 8.6% overall yield via the Claisen rearrangement of an aryl reverse-prenyl ether as the key step. Cytotoxic activities against human pancreatic carcinoma PANC-1 cells of cajaninstilbene acid and amorfrutins A-D were also evaluated.
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Affiliation(s)
- Tadafumi Fujita
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Jianyu Lin
- Laboratory of Natural Products for Drug Discovery, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan
| | - Atsushi Kimishima
- Laboratory of Natural Products for Drug Discovery, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan
| | - Masayoshi Arai
- Laboratory of Natural Products for Drug Discovery, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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14
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Ohkubo Y, Tomita N, Ogura Y, Takikawa H. Enantioselective synthesis of 6-methyloctanal and 8-methyldecanal, the characteristic aroma components in yuzu Citrus junos, and analysis of their enantiomeric compositions in yuzu essential oil. Biosci Biotechnol Biochem 2021; 86:170-176. [PMID: 34788374 DOI: 10.1093/bbb/zbab196] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/02/2021] [Indexed: 11/14/2022]
Abstract
6-Methyloctanal and 8-methyldecanal are the characteristic aroma components of yuzu Citrus junos. However, their absolute configurations and enantiomeric compositions in yuzu essential oil have not been analyzed. A concise enantioselective synthesis of both aldehydes was successfully carried out to determine their absolute configurations and enantiomeric compositions. Both aldehydes in yuzu essential oil were found to be (S)-form with high enantiomeric excess.
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Affiliation(s)
- Yasutaka Ohkubo
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan.,Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd., 29-7 Kariyado, Nakahara-ku, Kawasaki, Kanagawa, Japan
| | - Naomi Tomita
- Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd., 29-7 Kariyado, Nakahara-ku, Kawasaki, Kanagawa, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
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15
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Shiotani N, Wakabayashi T, Ogura Y, Okamura H, Sugimoto Y, Takikawa H. Synthesis of racemic orobanchols via acid-mediated cascade cyclization: Insight into the process of BC-ring formation in strigolactone biosynthesis. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Abstract
An enantioselective total synthesis of sporothriolide, a bioactive furofurandione-type fungal metabolite, has been achieved in a 21% overall yield from a commercially available β,γ-unsaturated carboxylic acid via seven steps. The key steps of this synthesis include a highly diastereoselective Michael addition of a chiral oxazolidinone derivative to a nitro olefin, the exploitation of an aromatic ring as a masked carboxylic acid functionality, and the base-promoted elimination of nitrous acid to install the α-methylene lactone unit of sporothriolide in the final step.
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Affiliation(s)
- Miku Kimura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Tomoyo Mohri
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Masaru Enomoto
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Yasuhiro Meguro
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
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17
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Kato S, Shimizu N, Ogura Y, Otoki Y, Ito J, Sakaino M, Sano T, Kuwahara S, Takekoshi S, Imagi J, Nakagawa K. Structural Analysis of Lipid Hydroperoxides Using Mass Spectrometry with Alkali Metals. J Am Soc Mass Spectrom 2021; 32:2399-2409. [PMID: 34382801 DOI: 10.1021/jasms.1c00039] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipid oxidation is involved in various biological phenomena (e.g., oxylipin generation and oxidative stress). Of oxidized lipid structures, the hydroperoxyl group position of lipid hydroperoxides (LOOHs) is a critical factor in determining their biological roles. Despite such interest, current methods to determine hydroperoxyl group positions possess some drawbacks such as selectivity. While we previously reported mass spectrometric methods using Na+ for the highly selective determination of hydroperoxyl group positions, nothing was known except for the fact that sodiated LOOHs (mainly linoleate) provide specific fragment ions. Thus, this study was aimed to investigate the effects of different alkali metals on the fragmentation of LOOHs, assuming its further application to analysis of other complex LOOHs. From the analysis of PC 16:0/18:2;OOH (phosphatidylcholine) and FA 18:2;OOH (fatty acid), we found that fragmentation pathways and ion intensities largely depend on the binding position and type of alkali metals (i.e., Li+, Hock fragmentation; Na+ and K+, α-cleavage (Na+ > K+); Rb+ and Cs+, no fragmentation). Furthermore, we proved that this method can be applied to determine the hydroperoxyl group position of esterified lipids (e.g., phospholipids and cholesterol esters) as well as polyunsaturated fatty acids (PUFAs) including n-3, n-6, and n-9 FA. We anticipate that the insights described in this study provide additional unique insights to conventional lipid oxidation research.
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Affiliation(s)
- Shunji Kato
- J-Oil Mills Innovation Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Naoki Shimizu
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Yurika Otoki
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Junya Ito
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Masayoshi Sakaino
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
- Food Design Center, J-Oil Mills, Inc., Yokohama, Kanagawa 230-0053, Japan
| | - Takashi Sano
- Food Design Center, J-Oil Mills, Inc., Yokohama, Kanagawa 230-0053, Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
| | - Susumu Takekoshi
- Department of Cell Biology, Division of Host Defense Mechanism, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan
| | - Jun Imagi
- J-Oil Mills Innovation Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
- Food Design Center, J-Oil Mills, Inc., Yokohama, Kanagawa 230-0053, Japan
| | - Kiyotaka Nakagawa
- J-Oil Mills Innovation Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan
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18
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Kanki D, Nakamukai S, Ogura Y, Takikawa H, Ise Y, Morii Y, Yamawaki N, Takatani T, Arakawa O, Okada S, Matsunaga S. Homophymamide A, Heterodetic Cyclic Tetrapeptide from a Homophymia sp. Marine Sponge: A Cautionary Note on Configurational Assignment of Peptides That Contain a Ureido Linkage. J Nat Prod 2021; 84:1848-1853. [PMID: 34081460 DOI: 10.1021/acs.jnatprod.1c00336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A previously unreported heterodetic cyclic peptide, homophymamide A (1), was isolated from a Homophymia sp. marine sponge. The structure of homophymamide A was determined to be a lower homologue of anabaenopeptins by spectroscopic analysis, chemical degradation, and chemical synthesis. Analysis of the acidic hydrolysate showed that the racemization of Lys took place, leading us to pose a cautionary note on the configurational assignment of peptides that contain a ureido bond.
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Affiliation(s)
- Daichi Kanki
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shohei Nakamukai
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yuji Ise
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa 905-0227, Japan
| | - Yasuhiro Morii
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Nobuhiro Yamawaki
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Tomohiro Takatani
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Osamu Arakawa
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Shigeru Okada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
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19
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Mpofu E, Alias A, Tomita K, Suzuki-Minakuchi C, Tomita K, Chakraborty J, Malon M, Ogura Y, Takikawa H, Okada K, Kimura T, Nojiri H. Azoxystrobin amine: A novel azoxystrobin degradation product from Bacillus licheniformis strain TAB7. Chemosphere 2021; 273:129663. [PMID: 33515965 DOI: 10.1016/j.chemosphere.2021.129663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/26/2020] [Accepted: 01/13/2021] [Indexed: 06/12/2023]
Abstract
Azoxystrobin (AZ) is a broad-spectrum synthetic fungicide widely used in agriculture globally. However, there are concerns about its fate and effects in the environment. It is reportedly transformed into azoxystrobin acid as a major metabolite by environmental microorganisms. Bacillus licheniformis strain TAB7 is used as a compost deodorant in commercial compost and has been found to degrade some phenolic and agrochemicals compounds. In this article, we report its ability to degrade azoxystrobin by novel degradation pathway. Biotransformation analysis followed by identification by electrospray ionization-mass spectrometry (MS), high-resolution MS, and nuclear magnetic resonance spectroscopy identified methyl (E)-3-amino-2-(2-((6-(2-cyanophenoxy)pyrimidin-4-yl)oxy)phenyl)acrylate, or (E)-azoxystrobin amine in short, and (Z) isomers of AZ and azoxystrobin amine as the metabolites of (E)-AZ by TAB7. Bioassay testing using Magnaporthe oryzae showed that although 40 μg/mL of (E)-AZ inhibited 59.5 ± 3.5% of the electron transfer activity between mitochondrial Complexes I and III in M. oryzae, the same concentration of (E)-azoxystrobin amine inhibited only 36.7 ± 15.1% of the activity, and a concentration of 80 μg/mL was needed for an inhibition rate of 56.8 ± 7.4%, suggesting that (E)-azoxystrobin amine is less toxic than the parent compound. To our knowledge, this is the first study identifying azoxystrobin amine as a less-toxic metabolite from bacterial AZ degradation and reporting on the enzymatic isomerization of (E)-AZ to (Z)-AZ, to some extent, by TAB7. Although the fate of AZ in the soil microcosm supplemented with TAB7 will be needed, our findings broaden our knowledge of possible AZ biotransformation products.
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Affiliation(s)
- Enock Mpofu
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Amirah Alias
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan; Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Keisuke Tomita
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Chiho Suzuki-Minakuchi
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan; Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Kenji Tomita
- Department of Applied Biological Chemistry, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Joydeep Chakraborty
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Michal Malon
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo, 196-8558, Japan
| | - Yusuke Ogura
- Department of Applied Biochemistry, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Hirosato Takikawa
- Department of Applied Biochemistry, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Kazunori Okada
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Toshiaki Kimura
- Agriculture and Biotechnology Business Division, Toyota Motor Corporation, 1099 Marune, Kurozasa-cho, Miyoshi-shi, Aichi, 470-0201, Japan
| | - Hideaki Nojiri
- Biotechnology Research Center, The University of Tokyo, Tokyo, 113-8657, Japan; Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo, 113-8657, Japan.
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20
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Ohkubo Y, Masuda Y, Ogura Y, Takikawa H, Watanabe H. Concise enantioselective synthesis of wine lactone via intramolecular Diels-Alder reaction. Biosci Biotechnol Biochem 2021; 85:1390-1394. [PMID: 33720279 DOI: 10.1093/bbb/zbab045] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 03/08/2021] [Indexed: 11/14/2022]
Abstract
An enantioselective synthesis of (3S,3aS,7aR)-wine lactone, a major aroma component of white wine and citrus juices, was achieved starting from (S)-2-methyl-3-butenoic acid. An intramolecular Diels-Alder reaction was employed as a key step.
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Affiliation(s)
- Yasutaka Ohkubo
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.,Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd., Kawasaki, Kanagawa, Japan
| | - Yui Masuda
- Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd., Kawasaki, Kanagawa, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hidenori Watanabe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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21
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Maeda S, Mohri T, Inoue T, Asano Y, Otoki Y, Enomoto M, Nakagawa K, Kuwahara S, Ogura Y. Synthesis of a plasmenylethanolamine. Biosci Biotechnol Biochem 2021; 85:1383-1389. [PMID: 33705523 DOI: 10.1093/bbb/zbab037] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 03/05/2021] [Indexed: 11/13/2022]
Abstract
A concise synthesis of a plasmenylethanolamine (PlsEtn-[16:0/18:1 n-9]), known as antioxidative phospholipids commonly found in cell membranes, has been achieved from an optically active known diol through 8 steps. The key transformations for the synthesis of PlsEtn-[16:0/18:1 n-9] are (1) regio- and Z-selective vinyl ether formation via the alkylation of a lithioalkoxy allyl intermediate with an alkyl iodide, and (2) a one-pot phosphite esterification-oxidation sequence to construct the ethanolamine phosphonate moiety in the presence of the vinyl ether functionality. The piperidine salt of synthetic PlsEtn-[16:0/18:1 n-9] was desalinated through reversed-phase high-performance liquid chromatography purification.
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Affiliation(s)
- Satoshi Maeda
- Laboratory of Food and Biodynamic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Tomoyo Mohri
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Tsubasa Inoue
- Laboratory of Food and Biodynamic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Yoshio Asano
- Laboratory of Food and Biodynamic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Yurika Otoki
- Laboratory of Food and Biodynamic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Masaru Enomoto
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Kiyotaka Nakagawa
- Laboratory of Food and Biodynamic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Aoba-ku, Sendai, Japan.,Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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22
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Nishimura T, Kawahara T, Kagaya N, Ogura Y, Takikawa H, Suenaga H, Adachi M, Hirokawa T, Doi T, Shin-Ya K. JBIR-155, a Specific Class D β-Lactamase Inhibitor of Microbial Origin. Org Lett 2021; 23:4415-4419. [PMID: 34029112 DOI: 10.1021/acs.orglett.1c01352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We discovered JBIR-155 as a novel specific class D β-lactamase inhibitor from Streptomyces polymachus SoB100815Hv02. JBIR-155 consists of a 6-oxabicyclo[3.2.0]heptan-7-one skeleton and a long unsaturated alkyl chain moiety of which absolute configuration was determined by spectroscopic data, modified Mosher's method, and analyses of the relative configuration of chemically modified derivative. JBIR-155 specifically exhibited inhibitory activity against the class D β-lactamase, with an IC50 value of 0.36 μM.
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Affiliation(s)
- Takehiro Nishimura
- Technology Research Association for Next Generation Natural Products Chemistry, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Teppei Kawahara
- Japan Biological Informatics Consortium (JBIC), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064 Japan
| | - Noritaka Kagaya
- Technology Research Association for Next Generation Natural Products Chemistry, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hikaru Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Masaatsu Adachi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Takatsugu Hirokawa
- National Institute of Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan.,Division of Biomedical Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Kazuo Shin-Ya
- Technology Research Association for Next Generation Natural Products Chemistry, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan.,National Institute of Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan.,Biotechnology Research Center, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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23
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Shiotani N, Wakabayashi T, Ogura Y, Sugimoto Y, Takikawa H. Studies on strigolactone BC-ring formation: Chemical conversion of an 18-hydroxycarlactonoate derivative into racemic 4-deoxyorobanchol/5-deoxystrigol via the acid-mediated cascade cyclization. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Hayakawa SH, Agari K, Ahn JK, Akaishi T, Akazawa Y, Ashikaga S, Bassalleck B, Bleser S, Ekawa H, Endo Y, Fujikawa Y, Fujioka N, Fujita M, Goto R, Han Y, Hasegawa S, Hashimoto T, Hayakawa T, Hayata E, Hicks K, Hirose E, Hirose M, Honda R, Hoshino K, Hoshino S, Hosomi K, Hwang SH, Ichikawa Y, Ichikawa M, Imai K, Inaba K, Ishikawa Y, Ito H, Ito K, Jung WS, Kanatsuki S, Kanauchi H, Kasagi A, Kawai T, Kim MH, Kim SH, Kinbara S, Kiuchi R, Kobayashi H, Kobayashi K, Koike T, Koshikawa A, Lee JY, Ma TL, Matsumoto SY, Minakawa M, Miwa K, Moe AT, Moon TJ, Moritsu M, Nagase Y, Nakada Y, Nakagawa M, Nakashima D, Nakazawa K, Nanamura T, Naruki M, Nyaw ANL, Ogura Y, Ohashi M, Oue K, Ozawa S, Pochodzalla J, Ryu SY, Sako H, Sato S, Sato Y, Schupp F, Shirotori K, Soe MM, Soe MK, Sohn JY, Sugimura H, Suzuki KN, Takahashi H, Takahashi T, Takeda T, Tamura H, Tanida K, Theint AMM, Tint KT, Toyama Y, Ukai M, Umezaki E, Watabe T, Watanabe K, Yamamoto TO, Yang SB, Yoon CS, Yoshida J, Yoshimoto M, Zhang DH, Zhang Z. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System. Phys Rev Lett 2021; 126:062501. [PMID: 33635678 DOI: 10.1103/physrevlett.126.062501] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/19/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.
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Affiliation(s)
- S H Hayakawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - K Agari
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Korea
| | - T Akaishi
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - Y Akazawa
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Ashikaga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - B Bassalleck
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
| | - S Bleser
- Helmholtz Institute Mainz, 55099 Mainz, Germany
| | - H Ekawa
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - Y Endo
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Fujikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - N Fujioka
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Fujita
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - R Goto
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Han
- Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - S Hasegawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - T Hashimoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - T Hayakawa
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - E Hayata
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Hicks
- Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - E Hirose
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - M Hirose
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - R Honda
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K Hoshino
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - S Hoshino
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - K Hosomi
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S H Hwang
- Korea Research Institute of Standards and Science, Daejeon 34113, Korea
| | - Y Ichikawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - M Ichikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- Meson Science Laboratory, RIKEN, Wako 351-0198, Japan
| | - K Imai
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - K Inaba
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Y Ishikawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - H Ito
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Ito
- Department of Physics, Nagoya University, Nagoya 464-8601, Japan
| | - W S Jung
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kanatsuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Kanauchi
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Kasagi
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - T Kawai
- Center for Advanced Photonics, RIKEN, Wako 351-0198, Japan
| | - M H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kinbara
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - R Kiuchi
- Institute of High Energy Physics, Beijing 100049, China
| | - H Kobayashi
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Kobayashi
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - T Koike
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Koshikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - J Y Lee
- Department of Physics, Seoul National University, Seoul 08826, Korea
| | - T L Ma
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
| | - S Y Matsumoto
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- Meson Science Laboratory, RIKEN, Wako 351-0198, Japan
| | - M Minakawa
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K Miwa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A T Moe
- Department of Physics, Lashio University, Lashio 06301, Myanmar
| | - T J Moon
- Department of Physics, Seoul National University, Seoul 08826, Korea
| | - M Moritsu
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - Y Nagase
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Nakada
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - M Nakagawa
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D Nakashima
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Nakazawa
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - T Nanamura
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M Naruki
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - A N L Nyaw
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - Y Ogura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Ohashi
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Oue
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - S Ozawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - J Pochodzalla
- Helmholtz Institute Mainz, 55099 Mainz, Germany
- Institut fur Kernphysik, Johannes Gutenberg-Universitat, 55099 Mainz, Germany
| | - S Y Ryu
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - H Sako
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S Sato
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - Y Sato
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - F Schupp
- Helmholtz Institute Mainz, 55099 Mainz, Germany
| | - K Shirotori
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - M M Soe
- Department of Physics, University of Yangon, Yangon 11041, Myanmar
| | - M K Soe
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - J Y Sohn
- Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea
| | - H Sugimura
- Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K N Suzuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Takahashi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takahashi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takeda
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Tamura
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanida
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - A M M Theint
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - K T Tint
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Toyama
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Ukai
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - E Umezaki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Watabe
- Department of Physics, Nagoya University, Nagoya 464-8601, Japan
| | - K Watanabe
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T O Yamamoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S B Yang
- Department of Physics, Korea University, Seoul 02841, Korea
| | - C S Yoon
- Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea
| | - J Yoshida
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Yoshimoto
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - D H Zhang
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
| | - Z Zhang
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
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25
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Ogura Y, Kobayashi H, Imoto M, Watanabe H, Takikawa H. Unified synthesis and assessment of tumor cell migration inhibitory activity of optically active UTKO1, originally designed moverastin analog. Biosci Biotechnol Biochem 2021; 85:160-167. [PMID: 33577660 DOI: 10.1093/bbb/zbaa062] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 09/05/2020] [Indexed: 11/14/2022]
Abstract
UTKO1 is a synthetic analog of a natural tumor cell migration inhibitor, moverastin, isolated from microbial extracts of Aspergillus sp. 7720. UTKO1 was initially developed as a mixture of the stereoisomers. In this study, a concise and unified synthesis of the 4 optically active stereoisomers of UTKO1 was achieved from a known optically pure dihydro-α-ionone through a 5-step sequence. The key transformation in the synthesis was a Nozaki-Hiyama-Kishi (NHK) reaction between an optically active enoltriflate and a known aldehyde to install the chiral allylic hydroxy group at C2'. Simple chromatographic separation of the 2 diastereomers with regard to the allylic hydroxy group was possible by the derivatization into the corresponding acetals with Nemoto's optical resolution reagent, (S)- or (R)-5-allyl-2-oxabicyclo[3.3.0]octene (ALBO). All 4 synthetic stereoisomers of UTKO1 exhibited comparable tumor cell migration inhibitory activity.
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Affiliation(s)
- Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, Japan
| | - Hiroki Kobayashi
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University , Hiyoshi, Kohoku-ku, Yokohama, Japan
| | - Masaya Imoto
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University , Hiyoshi, Kohoku-ku, Yokohama, Japan
| | - Hidenori Watanabe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, Japan
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Mohri T, Takahashi Y, Kwon E, Kuwahara S, Ogura Y. Stereocontrolled Total Synthesis of (-)-Isocelorbicol and Its Elaboration to Natural Dihydro-β-agarofuran Esters. Org Lett 2020; 22:9234-9238. [PMID: 33226244 DOI: 10.1021/acs.orglett.0c03419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first total synthesis of four naturally occurring dihydro-β-agarofuran esters has been accomplished via a highly stereocontrolled 14-step access to their common core triol, (-)-isocelorbicol. A semipinacol rearrangement of an epoxy alcohol to install a quaternary carbon, diastereoselective conjugate reduction of a spirocyclic butenolide for the establishment of a methyl-bearing chiral center, and ring-closing metathesis to construct the decalin ring system were exploited as the key steps for the high-yielding synthesis of (-)-isocelorbicol.
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Affiliation(s)
- Tomoyo Mohri
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Yusuke Takahashi
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Shigefumi Kuwahara
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Yusuke Ogura
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan.,Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Watanabe R, Kato N, Hayashi K, Tozawa S, Ogura Y, Kuwahara S, Ueda M. Stereoselective Syntheses of all the Possible Stereoisomers of Coronafacic Acid. ChemistryOpen 2020; 9:1008-1017. [PMID: 33072470 PMCID: PMC7545439 DOI: 10.1002/open.202000210] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/05/2020] [Indexed: 11/14/2022] Open
Abstract
An efficient and stereoselective syntheses of all the possible stereoisomers of coronafacic acid (CFA) has been developed. The stereochemistries of C3a and C7a were controlled in a diastereoselective Diels-Alder type cycloaddition using a chiral auxiliary. CFA and 6-epi-CFA were synthesized by hydrogenation of a common intermediate. During the synthesis of 6-epi-CFA, we established that its cis-fused configuration is important for the introduction of C4-C5 double bond by dehydration. This report is the first practical synthesis of both 6-epi-CFA, and its enantiomer.
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Affiliation(s)
- Raku Watanabe
- Graduate School of Life ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
| | - Nobuki Kato
- Graduate School of ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
| | - Kengo Hayashi
- Graduate School of ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
| | - Sho Tozawa
- Graduate School of ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural ScienceTohoku UniversitySendai980–8572Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural ScienceTohoku UniversitySendai980–8572Japan
| | - Minoru Ueda
- Graduate School of Life ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
- Graduate School of ScienceTohoku University6–3, Aramaki-Aza-Aoba, Aoba-kuSendai980-8578Japan
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Sawada K, Nakagami T, Rahmania H, Matsuki M, Ito J, Mohri T, Ogura Y, Kuwahara S, Hashimoto H, Nakagawa K. Isolation and structural elucidation of unique γ-oryzanol species in rice bran oil. Food Chem 2020; 337:127956. [PMID: 32919269 DOI: 10.1016/j.foodchem.2020.127956] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 04/11/2020] [Revised: 08/08/2020] [Accepted: 08/27/2020] [Indexed: 11/26/2022]
Abstract
Even though γ-oryzanol (OZ) such as 24-methylenecycloartanyl ferulate (24MCAFA) is abundant in purified rice bran oil, we realized that the oil contained the prospect of two additional novels of OZ species. To identify this, we isolated and analyzed their chemical structures by using HPLC-UV-MS, NMR, and IR. We revealed for the first time that the oil had also contained cyclobranyl ferulate (CBFA) and cyclosadyl ferulate (CSFA) which are likely to be exist due to the isomerism of 24MCAFA under acid condition. OZ profile including CBFA and CSFA was roughly similar between commercial rice bran oils and processed foods containing the oils, suggesting that people might have often consumed CBFA and CSFA from rice bran oils and/or processed foods. Since different OZ species are known to have different functionality, this study opens the chance to explore more the contribution of CBFA and CSFA for human health and wellness.
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Affiliation(s)
- Kazue Sawada
- Tsuno Food Industrial Co., Ltd., Ito, Wakayama 649-7194, Japan; Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Takuya Nakagami
- Tsuno Food Industrial Co., Ltd., Ito, Wakayama 649-7194, Japan
| | - Halida Rahmania
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Midori Matsuki
- Tsuno Food Industrial Co., Ltd., Ito, Wakayama 649-7194, Japan
| | - Junya Ito
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Tomoyo Mohri
- Applied Bioorganic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shigefumi Kuwahara
- Applied Bioorganic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | | | - Kiyotaka Nakagawa
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-8572, Japan.
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Shennan BDA, Smith PW, Ogura Y, Dixon DJ. A modular and divergent approach to spirocyclic pyrrolidines. Chem Sci 2020; 11:10354-10360. [PMID: 34094297 PMCID: PMC8162384 DOI: 10.1039/d0sc03676e] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 08/06/2020] [Indexed: 12/17/2022] Open
Abstract
An efficient three-step sequence to afford a valuable class of spirocyclic pyrrolidines is reported. A reductive cleavage/Horner-Wadsworth-Emmons cascade facilitates the spirocyclisation of a range of isoxazolines bearing a distal β-ketophosphonate. The spirocyclisation precursors are elaborated in a facile and modular fashion, via a [3 + 2]-cycloaddition followed by the condensation of a phosphonate ester, introducing multiple points of divergence. The synthetic utility of this protocol has been demonstrated in the synthesis of a broad family of 1-azaspiro[4,4]nonanes and in a concise formal synthesis of the natural product (±)-cephalotaxine.
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Affiliation(s)
- Benjamin D A Shennan
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford UK
| | - Peter W Smith
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford UK
| | - Yusuke Ogura
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford UK
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford UK
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Masuda M, Sakurai N, Ogura Y, Murase T, Kawasaki T, Aiba S, Mori N, Watanabe H, Takikawa H. Studies toward the enantioselective synthesis of neurymenolide A: Construction of the macrocyclic core via Claisen rearrangement. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ogura Y. [Consideration of Occupational Diversity via Academia through Studying Abroad in the UK]. YAKUGAKU ZASSHI 2020; 140:37-41. [PMID: 31902883 DOI: 10.1248/yakushi.19-00186-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Studying abroad may prove an attractive opportunity for young Japanese scientists, as it would allow them to broaden their perspectives regarding occupational diversity as a scientist. This is the first observation I made after studying abroad at the University of Oxford for two and a half years as a postdoctoral fellow. Many young scientists in the UK have got occupations not only in academia or in manufacturing industries, but also in various other business fields. Their occupational diversity seems to be considerably wider than that found among young Japanese scientists. The second feature I observed was related to my new lifestyle in the UK, which included the practice of research. It was notably different from my experiences in Japan, and it made me reconsider how to conduct my research in a more efficient manner. During my stay in the UK, I was able to identify the significance of spending time in a different culture by avoiding contact with Japanese culture as much as I could. In this essay, I introduce the details of my process of departing for the UK and my life in Oxford; it is my hope that this information will be useful for young Japanese scientists in contemplating their life plans.
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Affiliation(s)
- Yusuke Ogura
- Laboratory of Applied Bioorcanic Chemistry, Graduate School of Agricultural Science, Tohoku Univertsity
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Konishi S, Ogura Y, Takikawa H, Watanabe H. Asymmetric synthesis of trans-p-menth-3-ene-1,2,8-triol, the monoterpene isolated from herbal plants. Biosci Biotechnol Biochem 2020; 84:37-42. [DOI: 10.1080/09168451.2019.1671789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
ABSTRACT
The monoterpene, trans-p-menth-3-ene-1,2,8-triol, is a naturally occurring alcohol isolated from several herbal plants. In the present work, the asymmetric synthesis of both enantiomers of this natural product was achieved using Sharpless asymmetric dihydroxylation as the key step. A reversal of enantiofacial selectivity was observed in the asymmetric dihydroxylation.
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Affiliation(s)
- Shunsuke Konishi
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd., Nakahara-ku, Kawasaki, Kanagawa, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hidenori Watanabe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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35
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Shimomura S, Nishimura T, Ogura Y, Tanida J. Optical decomposition of DNA gel and modification of object mobility on micrometre scale. Sci Rep 2019; 9:19858. [PMID: 31882823 PMCID: PMC6934460 DOI: 10.1038/s41598-019-56501-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 12/10/2019] [Indexed: 12/05/2022] Open
Abstract
DNA gels can be engineered to exhibit specific properties through the choice of DNA sequences and modification with dye molecules, and can therefore be useful in biomedical applications such as the detection of biomolecules. State transitions of DNA gels on the micrometre scale can generate a viscosity gradient, which can be used to modify the mobility of micrometre-sized objects. In this paper, we propose a method for changing the viscosity of DNA gels using optical decomposition. The use of light allows for decomposition on the micrometre scale, which can be used to achieve patterned viscosity changes within DNA gels. Decomposition was induced by thermal energy released through non-radiative relaxation of excited quenchers. We demonstrated the decomposition of DNA gels in response to irradiation patterns on the micrometre scale. In addition, as a result of changes in DNA gel viscosity due to decomposition, the mobility of polystyrene beads was shown to increase. This technique could provide a new optical approach for controlling the mobility of micrometre-sized objects.
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Affiliation(s)
- Suguru Shimomura
- Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Takahiro Nishimura
- Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yusuke Ogura
- Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jun Tanida
- Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka, 565-0871, Japan
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Kawamoto M, Sato S, Enomoto M, Ogura Y, Kuwahara S. Total Synthesis of Diocollettines A via an Acid-Promoted Oxa-Michael-Aldol-Acetalization Cascade. Org Lett 2019; 21:10099-10101. [PMID: 31794233 DOI: 10.1021/acs.orglett.9b04074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A diastereo- and enantioselective total synthesis of diocollettines A with an unusual oxygen-containing tricyclic ring system has been achieved in 63% overall yield from commercially available 3-phenylpropanal via four steps. The key feature of the present synthesis is an exclusively diastereoselective cascade sequence composed of a trans-selective oxa-Michael addition of 1,3-dihydroxyacetone to a 2,3-dihydropyrylium ion intermediate, intramolecular aldol-type reaction, and intramolecular acetalization.
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Affiliation(s)
- Misaki Kawamoto
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba , Aoba-ku , Sendai 980-0845 , Japan
| | - Shuntaro Sato
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba , Aoba-ku , Sendai 980-0845 , Japan
| | - Masaru Enomoto
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba , Aoba-ku , Sendai 980-0845 , Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba , Aoba-ku , Sendai 980-0845 , Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba , Aoba-ku , Sendai 980-0845 , Japan
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Takahashi K, Ogura Y, Kuse M, Takikawa H. First synthesis and absolute configuration of phorbasin H, a diterpene carboxylic acid isolated from the sponge Phorbas gukulensis. Biosci Biotechnol Biochem 2019; 83:2198-2201. [DOI: 10.1080/09168451.2019.1654850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
ABSTRACT
The first synthesis of phorbasin H, a diterpene carboxylic acid isolated from the sponge Phorbas gukulensis, was achieved using 1,4-trans-cyclohexanedimethanol and (S)-citronellal as starting materials. The data collected in this synthesis indicated the absolute configuration of the naturally occurring phorbasin H to be S.
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Affiliation(s)
- Kensuke Takahashi
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Masaki Kuse
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Affiliation(s)
- Shogo Tsukaguchi
- Graduate School of Agricultural Science; Tohoku University; 468-1 Aramaki-Aza-Aoba Aoba-ku, Sendai 980-0845 Japan
| | - Masaru Enomoto
- Graduate School of Agricultural Science; Tohoku University; 468-1 Aramaki-Aza-Aoba Aoba-ku, Sendai 980-0845 Japan
| | - Ryo Towada
- Graduate School of Agricultural Science; Tohoku University; 468-1 Aramaki-Aza-Aoba Aoba-ku, Sendai 980-0845 Japan
| | - Yusuke Ogura
- Graduate School of Agricultural Science; Tohoku University; 468-1 Aramaki-Aza-Aoba Aoba-ku, Sendai 980-0845 Japan
| | - Shigefumi Kuwahara
- Graduate School of Agricultural Science; Tohoku University; 468-1 Aramaki-Aza-Aoba Aoba-ku, Sendai 980-0845 Japan
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39
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Yamamoto Y, Ogura Y, Watanabe H, Takikawa H. First synthesis of both enantiomers of pseudohygrophorone A12, an anti-fungal cyclohexenone derivative isolated from Hygrophorus abieticola. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
NFAT-133, isolated from Streptomyces sp., is an immunosuppressive, antidiabetic, and antitrypanosomal aromatic polyketide with three contiguous stereocenters. The first enantioselective total synthesis of the proposed structure of NFAT-133 [(10R,11R,12S)-1] and its C10 epimer [(10S,11R,12S)-1] was achieved from a known aromatic ester (5) by a 10-step sequence that featured chiral auxiliary-directed asymmetric alkylation and the Evans asymmetric aldol reaction as the chirality-inducing steps. The 1H and 13C NMR data as well as the specific rotation value of natural NFAT-133 were not identical to those of the proposed structure, but were in good agreement with those of its C10 epimer. This led us to conclude that the absolute configuration of NFAT-133 should be revised to 10S, 11R, and 12S.
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Affiliation(s)
- Hikaru Sato
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845 , Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai 980-8578 , Japan
| | - Yuka Taguchi
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845 , Japan
| | - Shinichiro Yoshida
- Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai 980-8578 , Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845 , Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845 , Japan
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Abstract
A concise, unified total synthesis of the two prenylated aromatic polyketides amorfrutins A and C, which exhibit various medicinally important biological profiles such as antimicrobial, PPARγ modulating and quorum sensing inhibitory activities, has been achieved from commercially available 3,5-dimethoxybenzaldehyde in 38% and 10% overall yields through nine and ten steps, respectively. The key transformation for the synthesis of amorfrutin A was the Claisen rearrangement of a mono-O-(1,1-dimethylallyl)resorcinol derivative to install the C3-prenyl substituent, while that for the synthesis of amorfrutin C was the double Claisen rearrangement of a di-O-(1,1-dimethylallyl)resorcinol derivative to introduce the two prenyl groups at the C3 and C5 positions all at once.
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Affiliation(s)
- Tadafumi Fujita
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University , Sendai , Japan
| | - Shigefumi Kuwahara
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University , Sendai , Japan
| | - Yusuke Ogura
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University , Sendai , Japan
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42
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Ito J, Komuro M, Parida IS, Shimizu N, Kato S, Meguro Y, Ogura Y, Kuwahara S, Miyazawa T, Nakagawa K. Evaluation of lipid oxidation mechanisms in beverages and cosmetics via analysis of lipid hydroperoxide isomers. Sci Rep 2019; 9:7387. [PMID: 31089240 PMCID: PMC6517444 DOI: 10.1038/s41598-019-43645-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 04/26/2019] [Indexed: 02/07/2023] Open
Abstract
Understanding of lipid oxidation mechanisms (e.g., auto-oxidation and photo-oxidation) in foods and cosmetics is deemed essential to maintain the quality of such products. In this study, the oxidation mechanisms in foods and cosmetics were evaluated through analysis of linoleic acid hydroperoxide (LAOOH) and linoleic acid ethyl ester hydroperoxide (ELAOOH) isomers. Based on our previous method for analysis of LAOOH isomers, in this study, we developed a new HPLC-MS/MS method that enables analysis of ELAOOH isomers. The HPLC-MS/MS methods to analyze LAOOH and ELOOH isomers were applied to food (liquor) and cosmetic (skin cream) samples. As a result, LAOOH and ELAOOH isomers specific to photo-oxidation, and ELAOOH isomers characteristic to auto-oxidation were detected in some marketed liquor samples, suggesting that lipid oxidation of marketed liquor proceeds by both photo- and auto-oxidation during the manufacturing process and/or sales. In contrast, because only LAOOH and ELAOOH isomers specific to auto-oxidation were detected in skin cream stored under dark at different temperatures (-5 °C-40 °C) for different periods (2-15 months), auto-oxidation was considered to be the major oxidation mechanism in such samples. Therefore, our HPLC-MS/MS methods appear to be powerful tools to elucidate lipid oxidation mechanisms in food and cosmetic products.
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Affiliation(s)
- Junya Ito
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Marina Komuro
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Isabella Supardi Parida
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Naoki Shimizu
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Shunji Kato
- Department of Cell Biology, Division of Host Defense Mechanism, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan
| | - Yasuhiro Meguro
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
| | - Teruo Miyazawa
- Food and Health Science Research Unit, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan
- Food and Biotechnology Innovation Project, New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Miyagi, 980-8579, Japan
| | - Kiyotaka Nakagawa
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan.
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Affiliation(s)
- Yasuhiro Meguro
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Yusuke Ogura
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Masaru Enomoto
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Shigefumi Kuwahara
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
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44
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Kagomiya I, Murayama T, Tsunekawa K, Kakimoto KI, Ogura Y. Crystalline phases and oxygen permeation properties of mixed conductive (La, Ca)FeO3-. Ann Ital Chir 2019. [DOI: 10.1016/j.jeurceramsoc.2018.12.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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45
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Rai MR, Vijayakumar A, Ogura Y, Rosen J. Resolution enhancement in nonlinear interferenceless COACH with point response of subdiffraction limit patterns. Opt Express 2019; 27:391-403. [PMID: 30696126 DOI: 10.1364/oe.27.000391] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
Interferenceless coded aperture correlation holography (I-COACH) is a non-scanning, motionless, incoherent digital holography technique for 3D imaging. The lateral and axial resolutions of I-COACH are equivalent to those of conventional direct imaging with the same numerical aperture. The main component of I-COACH is a coded phase mask (CPM) used as the system aperture. In this study, the CPM has been engineered using a modified Gerchberg-Saxton algorithm to generate a random distribution of subdiffraction spot arrays on the digital camera as a system response to a point source illumination. A library of point object holograms is created to calibrate the system for imaging different lateral sections of a 3D object. An object is placed within the calibrated 3D space and an object hologram is recorded with the same CPM. The various planes of the object are reconstructed by a non-linear cross-correlation between the object hologram and the point object hologram library. A lateral resolution enhancement of about 25% was noted in the case of I-COACH compared to direct imaging.
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46
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Ito D, Ogura Y, Sawamoto M, Terashima T. Acrylate-Selective Transesterification of Methacrylate/Acrylate Copolymers: Postfunctionalization with Common Acrylates and Alcohols. ACS Macro Lett 2018; 7:997-1002. [PMID: 35650952 DOI: 10.1021/acsmacrolett.8b00502] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Acrylate-selective transesterification of methacrylate/acrylate copolymers with alcohols was developed for a site-selective postfunctionalization technique of polymers without using specific monomers. Importantly, a common methyl acrylate efficiently works as a selective modification unit via transesterification coupled with a titanium alkoxide catalyst. The acrylate-selective transesterification is achieved owing to less steric hindrance of the carbonyl groups that are attached to the main chain without an α-methyl group. Typically, the acrylate pendants of dodecyl methacrylate/methyl acrylate (MA) random copolymers were selectively transesterified with benzyl alcohol (BzOH). The conversion of the pendent esters into benzyl esters proportionally increased with MA contents. Additionally, various alcohols were applicable to this MA-selective transesterification system.
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Affiliation(s)
- Daiki Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yusuke Ogura
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Institute of Science and Technology Research, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Takaya Terashima
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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47
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Affiliation(s)
- Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shoko Okada
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Naoki Mori
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ken Ishigami
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hidenori Watanabe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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48
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Imai H, Kamei H, Onishi Y, Ishizu Y, Ishigami M, Goto H, Ogura Y. Diagnostic Usefulness of APRI and FIB-4 for the Prediction of Liver Fibrosis After Liver Transplantation in Patients Infected with Hepatitis C Virus. Transplant Proc 2018; 50:1431-1436. [PMID: 29705278 DOI: 10.1016/j.transproceed.2018.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 03/01/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Aspartate transaminase-to-platelet ratio index (APRI) and fibrosis-4 (FIB-4) are well known as representative indirect serum biomarkers related to liver fibrosis. The usefulness of these markers for the diagnosis of liver fibrosis after liver transplantation (LT) in hepatitis C virus (HCV)-infected patients and the influence of splenectomy were investigated. METHODS From June 2003 to May 2014, 31 HCV-infected patients who underwent LT and postoperative follow-up liver biopsies were included in this study. The association between liver fibrosis and serum biomarkers and the influence of splenectomy on APRI and FIB-4 were also investigated. RESULTS A total of 195 biopsy specimens were collected, and liver fibrosis was identified as: F0, 59.7%; F1, 34.1%; and F2, 6.3%. Both APRI and FIB-4 were significantly higher in patients who showed F1 and F2 in liver biopsy specimen than F0 (P values, .009 and .022, respectively); sensitivity and specificity of APRI were, respectively, 63.4% and 66.7%, and those of FIB-4 were 57.7% and 69.6%. In 11 patients (35.5%) who underwent splenectomy at the time of LT, the cutoff values for APRI and FIB-4 were 0.61 and 1.41, which were significantly lower than the corresponding values (1.00 and 3.64) of patients without splenectomy. CONCLUSIONS APRI and FIB-4 could effectively estimate liver fibrosis after LT for HCV-related liver disease. For LT patients with splenectomy, APRI and FIB-4 were also useful to estimate liver fibrosis, but the standard values should be adjusted lower than those for patients without splenectomy.
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Affiliation(s)
- H Imai
- Department of Transplantation Surgery, Nagoya University School of Medicine, Nagoya, Japan
| | - H Kamei
- Department of Transplantation Surgery, Nagoya University School of Medicine, Nagoya, Japan
| | - Y Onishi
- Department of Transplantation Surgery, Nagoya University School of Medicine, Nagoya, Japan
| | - Y Ishizu
- Department of Gastroenterology and Hepatology, Nagoya University School of Medicine, Nagoya, Japan
| | - M Ishigami
- Department of Gastroenterology and Hepatology, Nagoya University School of Medicine, Nagoya, Japan
| | - H Goto
- Department of Gastroenterology and Hepatology, Nagoya University School of Medicine, Nagoya, Japan
| | - Y Ogura
- Department of Transplantation Surgery, Nagoya University School of Medicine, Nagoya, Japan.
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49
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Yang SB, Ahn JK, Akazawa Y, Aoki K, Chiga N, Ekawa H, Evtoukhovitch P, Feliciello A, Fujita M, Hasegawa S, Hayakawa S, Hayakawa T, Honda R, Hosomi K, Hwang SH, Ichige N, Ichikawa Y, Ikeda M, Imai K, Ishimoto S, Kanatsuki S, Kim SH, Kinbara S, Kobayashi K, Koike T, Lee JY, Miwa K, Moon TJ, Nagae T, Nakada Y, Nakagawa M, Ogura Y, Sakaguchi A, Sako H, Sasaki Y, Sato S, Shirotori K, Sugimura H, Suto S, Suzuki S, Takahashi T, Tamura H, Tanida K, Togawa Y, Tsamalaidze Z, Ukai M, Wang TF, Yamamoto TO. First Determination of the Level Structure of an sd-Shell Hypernucleus, _{Λ}^{19}F. Phys Rev Lett 2018; 120:132505. [PMID: 29694189 DOI: 10.1103/physrevlett.120.132505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/15/2018] [Indexed: 06/08/2023]
Abstract
We report on the first observation of γ rays emitted from an sd-shell hypernucleus, _{Λ}^{19}F. The energy spacing between the ground state doublet, 1/2^{+} and 3/2^{+} states, of _{Λ}^{19}F is determined to be 315.5±0.4(stat)_{-0.5}^{+0.6}(syst) keV by measuring the γ-ray energy of the M1(3/2^{+}→1/2^{+}) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2^{+}→1/2^{+}), E1(1/2^{-}→1/2^{+}), and E1(1/2^{-}→3/2^{+}) transitions. The excitation energies of the 5/2^{+} and 1/2^{-} states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)_{-0.5}^{+0.7}(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.
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Affiliation(s)
- S B Yang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Korea
| | - Y Akazawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Aoki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - N Chiga
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - H Ekawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - P Evtoukhovitch
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - A Feliciello
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
| | - M Fujita
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Hasegawa
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Hayakawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Hayakawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - R Honda
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - K Hosomi
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S H Hwang
- Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
| | - N Ichige
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Y Ichikawa
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - M Ikeda
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Imai
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Ishimoto
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Kanatsuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kinbara
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Kobayashi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Koike
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - J Y Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - K Miwa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T J Moon
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - T Nagae
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Y Nakada
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Nakagawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Ogura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Sakaguchi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Sako
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Y Sasaki
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Sato
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - K Shirotori
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Sugimura
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Suto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Suzuki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takahashi
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - H Tamura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanida
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Y Togawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Z Tsamalaidze
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - M Ukai
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T F Wang
- Research Center of Nuclear Science and Technology (RCNST) and School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - T O Yamamoto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
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Abstract
Two protected 14,15-secoergostane derivatives suitable as pivotal intermediates for the synthesis of strophasterols A and B, anti-MRSA and neuronal cell-protecting natural products bearing a recently discovered strophastane skeleton, have been synthesized by two different routes. The first approach employed an oxidative cleavage of an α-hydroxy ketone intermediate with the Jones reagent as the key step to reach the targeted secoergostane from ergosterol in ten steps. In the second approach, an unprecedented reaction cascade composed of four reactions enabled us to obtain the secoergostane more efficiently in six steps.
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Affiliation(s)
- Yuki Fukuda
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Shuntaro Sato
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Yusuke Ogura
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Shigefumi Kuwahara
- a Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
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