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Bulcock BW, Chen R, Lacey E, Chooi YH, Flematti GR. Ether-Diol Ambiguity: An Inconspicuous Issue in the Structure Elucidation of Oxygenated Natural Products. JOURNAL OF NATURAL PRODUCTS 2024; 87:2101-2109. [PMID: 39129216 DOI: 10.1021/acs.jnatprod.4c00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Tertiary and allylic hydroxyl groups readily eliminate water during positive ion mode mass spectrometry and may show similar NMR spectra to their corresponding ethers. In a routine structure elucidation workflow, these factors can cause researchers to incorrectly assign diol moieties as ethers or vice versa, leading to inaccurate chemical structures. After facing this problem during our work on oxygenated sesquiterpenoids from a Fusarium sp. fungal strain, we became aware of this challenging issue. We examined the literature for oxygenated natural products bearing these functional groups, and with the aid of density functional calculations of NMR chemical shifts, we now report the structures of 15 natural products that should be revised. We further establish that derivatizing sub-micromolar amounts of alcohols to their sulfates can be used to distinguish these from their corresponding ethers using liquid chromatography negative ion mode mass spectrometry. Finally, we isolated lignoren/cyclonerodiol from the Fusarium sp. culture extract and supported its revised identity as cyclonerodiol using this sulfation approach. Our results suggest that ether-diol ambiguity could be a prevalent issue affecting the structure elucidation of oxygenated natural products and highlight the importance of using complementary techniques, such as sulfation with LC-(-)-ESI-MS or density functional calculations of NMR chemical shifts.
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Affiliation(s)
- Brodie W Bulcock
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Rachel Chen
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Ernest Lacey
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Yit-Heng Chooi
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Gavin R Flematti
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
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Devasahayam Arokia Balaya R, Palollathil A, Kumar STA, Chandrasekaran J, Upadhyay SS, Parate SS, Sajida M, Karthikkeyan G, Prasad TSK. Role of Hemigraphis alternata in wound healing: metabolomic profiling and molecular insights into mechanisms. Sci Rep 2024; 14:3872. [PMID: 38365839 PMCID: PMC10873326 DOI: 10.1038/s41598-024-54352-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/12/2024] [Indexed: 02/18/2024] Open
Abstract
Hemigraphis alternata (H. alternata), commonly known as Red Flame Ivy, is widely recognized for its wound healing capabilities. However, the pharmacologically active plant components and their mechanisms of action in wound healing are yet to be determined. This study presents the mass spectrometry-based global metabolite profiling of aqueous and ethanolic extract of H. alternata leaves. The analysis identified 2285 metabolites from 24,203 spectra obtained in both positive and negative polarities. The identified metabolites were classified under ketones, carboxylic acids, primary aliphatic amines, steroids and steroid derivatives. We performed network pharmacology analysis to explore metabolite-protein interactions and identified 124 human proteins as targets for H. alternata metabolites. Among these, several of them were implicated in wound healing including prothrombin (F2), alpha-2A adrenergic receptor (ADRA2A) and fibroblast growth factor receptor 1 (FGFR1). Gene ontology analysis of target proteins enriched cellular functions related to glucose metabolic process, platelet activation, membrane organization and response to wounding. Additionally, pathway enrichment analysis revealed potential molecular network involved in wound healing. Moreover, in-silico docking analysis showed strong binding energy between H. alternata metabolites with identified protein targets (F2 and PTPN11). Furthermore, the key metabolites involved in wound healing were further validated by multiple reaction monitoring-based targeted analysis.
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Affiliation(s)
- Rex Devasahayam Arokia Balaya
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Akhina Palollathil
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
| | - Sumaithangi Thattai Arun Kumar
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
| | - Jaikanth Chandrasekaran
- Department of Pharmacology, Sri Ramachandra Faculty of Pharmacy, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, 600116, India
| | - Shubham Sukerndeo Upadhyay
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
| | - Sakshi Sanjay Parate
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
| | - M Sajida
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Gayathree Karthikkeyan
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India, 575018
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Liu Y, Lu W, Li Y, Zhai B, Zhang B, Qin H, Xu P, Yang Y, Fan S, Wang Y, Li C, Zhao J, Ai J. Diversity of Endophytes of Actinidia arguta in Different Seasons. Life (Basel) 2024; 14:149. [PMID: 38276278 PMCID: PMC10819999 DOI: 10.3390/life14010149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 01/27/2024] Open
Abstract
The seasonal changes in environmental conditions can alter the growth states of host plants, thereby affecting the living environment of endophytes and forming different endophytic communities. This study employs Illumina MiSeq next-generation sequencing to analyze the 16SrRNA and ITS rDNA of endophytes in 24 samples of Actinidia arguta stem tissues across different seasons. The results revealed a high richness and diversity of endophytes in Actinidia arguta, with significant seasonal variations in microbial community richness. This study identified 897 genera across 36 phyla for bacteria and 251 genera across 8 phyla for fungi. Notably, 69 bacterial genera and 19 fungal genera significantly contributed to the differences in community structure across seasons. A distinctive feature of coexistence in the endophytic community, both specific and conservative across different seasons, was observed. The bacterial community in winter demonstrated significantly higher richness and diversity compared to the other seasons. Environmental factors likely influence the optimal timing for endophyte colonization. Solar radiation, temperature, precipitation, and relative humidity significantly impact the diversity of endophytic bacteria and fungi. In addition, seasonal variations show significant differences in the nutritional modes of fungal endophytes and the degradation, ligninolysis, and ureolysis functions of bacterial endophytes. This study elucidates the potential role of endophytes in assisting Actinidia arguta in adapting to seasonal changes and provides a theoretical basis for further exploration of functional microbial strains.
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Affiliation(s)
- Yingxue Liu
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Wenpeng Lu
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Yang Li
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (Y.L.); (B.Z.); (J.Z.)
| | - Boyu Zhai
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (Y.L.); (B.Z.); (J.Z.)
| | - Baoxiang Zhang
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Hongyan Qin
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Peilei Xu
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Yiming Yang
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Shutian Fan
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Yue Wang
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Changyu Li
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China; (Y.L.); (W.L.); (B.Z.); (H.Q.); (P.X.); (Y.Y.); (S.F.); (Y.W.); (C.L.)
| | - Jianjun Zhao
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (Y.L.); (B.Z.); (J.Z.)
| | - Jun Ai
- College of Horticulture, Jilin Agricultural University, Changchun 130112, China
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