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Kimoto S, Takeuchi M, Kishino S, Itagaki Y, Hara R, Kitamura N, Okada N, Park SB, Ando A, Ueda M, Ogawa J. Characterization of regioselective glycosyltransferase of Rhizobium pusense JCM 16209 T useful for resveratrol 4'-O-α-d-glucoside production. J Biosci Bioeng 2022; 134:213-219. [PMID: 35864060 DOI: 10.1016/j.jbiosc.2022.06.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 06/10/2022] [Accepted: 06/21/2022] [Indexed: 10/17/2022]
Abstract
Enzymatic glycosylation is an industrially useful technique for improving the properties of compounds with hydroxy groups, and the biological activities of the resulting glycosides differ depending on the glycosylation position. Therefore, regioselective glycosyltransferases are required for precise synthesis of glycosides. We found that Rhizobium pusense JCM 16209T could catalyze the regioselective glycosylation of resveratrol. To identify the regioselective glycosyltransferase, two α-glucosidases of R. pusense JCM 16209T (RpG I and RpG II) were cloned and expressed in Escherichia coli. The molecular mass of purified recombinant RpG I and II was estimated to be 60 kDa by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). RpG I showed strong glycosylation activity toward resveratrol with 4'-selectivity of 98.3%. The enzyme activity was maximized at pH 8.0 and 50 °C, and enhanced in the presence of Cs+ and Li+ ions. The maximum molar yield of resveratrol 4'-O-α-glucoside from resveratrol reached 41.6% at 30 min, and the concentration of the product was 2.08 mmol L-1. Glycosylation activity was observed toward resveratrol as well as toward caffeic acid, ferulic acid, 6-gingerol, flavonoid, and isoflavonoid compounds with high regioselectivity, indicating that RpG I could glycosylate a wide range of substrates. To the best of our knowledge, there are few reports on microbial glycosyltransferases that are useful for regioselective glycosylation. This research could be the first step toward developing technologies for the precise synthesis of glycosides.
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Affiliation(s)
- Shota Kimoto
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Michiki Takeuchi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shigenobu Kishino
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yudai Itagaki
- Department of Materials Chemistry and Bioengineering, National Institute of Technology, Oyama College, 771 Nakakuki, Oyama, Tochigi 323-0806, Japan
| | - Ryotaro Hara
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Nahoko Kitamura
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Natsumi Okada
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Si-Bum Park
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Akinori Ando
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Ueda
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan; Department of Materials Chemistry and Bioengineering, National Institute of Technology, Oyama College, 771 Nakakuki, Oyama, Tochigi 323-0806, Japan
| | - Jun Ogawa
- Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
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Salami M, Sadeghian Motahar SF, Ariaeenejad S, Sheykh Abdollahzadeh Mamaghani A, Kavousi K, Moosavi-Movahedi AA, Hosseini Salekdeh G. The novel homologue of the human α-glucosidase inhibited by the non-germinated and germinated quinoa protein hydrolysates after in vitro gastrointestinal digestion. J Food Biochem 2021; 46:e14030. [PMID: 34914113 DOI: 10.1111/jfbc.14030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 12/14/2022]
Abstract
Quinoa (Chenopodium quinoa Willd) is a potential source of protein with ideal amino acid profiles which its bioactive compounds can be improved during germination and gastrointestinal digestion. The present investigation studies the impact of germination for 24 hr and simulated gastrointestinal digestion on α-glucosidase inhibitory activity of the quinoa protein and bioactive peptides against the novel homologue of human α-glucosidase, PersiAlpha-GL1. The sprouted quinoa after gastroduodenal digestion was the most effective α-glucosidase inhibitor showing 81.10% α-glucosidase inhibition at concentration 4 mg/ml with the half inhibition rate (IC50 ) of 0.07 mg/ml. Based on the kinetic analysis, both the germinated and non-germinated samples before and after digestion were competitive-type inhibitors of α-glucosidase. Results of this study showed the improved α-glucosidase inhibitory activity of the quinoa bioactive peptides after germination and gastrointestinal digestion and highlighted the potential of metagenome-derived PersiAlpha-GL1 as a novel homologue of the human α-glucosidase for developing the future anti-diabetic drugs. PRACTICAL APPLICATIONS: This study aimed to evaluate the effect of germination and gastrointestinal digestion of the quinoa protein and bioactive peptides on α-glucosidase inhibitory activity against the novel PersiAlpha-GL1. Metagenomic data were used to identify the novel α-glucosidase structurally and functionally homologue of human intestinal. The results showed the highest inhibition on PersiAlpha-GL1 by a germinated quinoa after gastroduodenal digestion and confirmed the potential of PersiAlpha-GL1 to enhance the effectiveness of the anti-diabetic drugs for industrial application.
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Affiliation(s)
- Maryam Salami
- Department of Food Science and Engineering, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
| | - Seyedeh Fatemeh Sadeghian Motahar
- Department of Food Science and Engineering, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
| | - Shohreh Ariaeenejad
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran
| | - Atefeh Sheykh Abdollahzadeh Mamaghani
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran
| | - Kaveh Kavousi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | | | - Ghasem Hosseini Salekdeh
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran
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