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Mizutani T, Hara R, Takeuchi M, Hibi M, Ueda M, Ogawa J. One-Pot Synthesis of Useful S-Substituted-l-cysteine Sulfoxides Using Genetically Engineered Escherichia coli. J Agric Food Chem 2024; 72:5339-5347. [PMID: 38417143 DOI: 10.1021/acs.jafc.3c08824] [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] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
S-Substituted-l-cysteine sulfoxides are valuable compounds that are contained in plants. Particularly, (+)-alliin and its degraded products have gained significant attention because of their human health benefits. However, (+)-alliin production has been limited to extraction from plants and chemical synthesis; both methods have drawbacks in terms of stability and safety. Here, we proposed the enzymatic cascade reaction for synthesizing (+)-alliin from readily available substrates. To achieve a one-pot (+)-alliin production, we constructed Escherichia coli coexpressing the genes encoding tryptophan synthase from Aeromonas hydrophila ssp. hydrophila NBRC 3820 and l-isoleucine hydroxylase from Bacillus thuringiensis 2e2 for the biocatalyst. Deletion of tryptophanase gene in E. coli increased the yield about 2-fold. Under optimized conditions, (+)-alliin accumulation reached 110 mM, which is the highest productivity thus far. Moreover, natural and unnatural S-substituted-l-cysteine sulfoxides were synthesized by applying various thiols to the cascade reaction. These results indicate that the developed bioprocess would enable the supply of diverse S-substituted-l-cysteine sulfoxides.
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Affiliation(s)
- Taku Mizutani
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Ryotaro Hara
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Michiki Takeuchi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Hibi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama 939-0398, Japan
| | - Makoto Ueda
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, 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 Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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Arras SD, Sibaeva N, Catchpole RJ, Horinouchi N, Si D, Rickerby AM, Deguchi K, Hibi M, Tanaka K, Takeuchi M, Ogawa J, Poole AM. Characterisation of an Escherichia coli line that completely lacks ribonucleotide reduction yields insights into the evolution of parasitism and endosymbiosis. eLife 2023; 12:83845. [PMID: 37022136 PMCID: PMC10121223 DOI: 10.7554/elife.83845] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 04/05/2023] [Indexed: 04/07/2023] Open
Abstract
All life requires ribonucleotide reduction for de novo synthesis of deoxyribonucleotides. A handful of obligate intracellular species are known to lack ribonucleotide reduction and are instead dependent on their host for deoxyribonucleotide synthesis. As ribonucleotide reduction has on occasion been lost in obligate intracellular parasites and endosymbionts, we reasoned that it should in principle be possible to knock this process out entirely under conditions where deoxyribonucleosides are present in the growth media. We report here the creation of a strain of E. coli where all three ribonucleotide reductase operons have been fully deleted following introduction of a broad spectrum deoxyribonucleoside kinase from Mycoplasma mycoides. Our strain is able to grow in the presence of deoxyribonucleosides and shows slowed but substantial growth. Under limiting deoxyribonucleoside levels, we observe a distinctive filamentous cell morphology, where cells grow but do not appear to divide regularly. Finally, we examined whether our lines are able to adapt to limited supplies of deoxyribonucleosides, as might occur in the evolutionary switch from de novo synthesis to dependence on host production during the evolution of parasitism or endosymbiosis. Over the course of an evolution experiment, we observe a 25-fold reduction in the minimum concentration of exogenous deoxyribonucleosides necessary for growth. Genome analysis of replicate lines reveals that several lines carry mutations in deoB and cdd. deoB codes for phosphopentomutase, a key part of the deoxyriboaldolase pathway, which has been hypothesised as an alternative to ribonucleotide reduction for deoxyribonucleotide synthesis. Rather than synthesis via this pathway complementing the loss of ribonucleotide reduction, our experiments reveal that mutations appear that reduce or eliminate the capacity for this pathway to catabolise deoxyribonucleotides, thus preventing their loss via central metabolism. Mutational inactivation of both deoB and cdd is also observed in a number of obligate intracellular bacteria that have lost ribonucleotide reduction. We conclude that our experiments recapitulate key evolutionary steps in the adaptation to intracellular life without ribonucleotide reduction.
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Affiliation(s)
- Samantha D Arras
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Nellie Sibaeva
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Ryan J Catchpole
- School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | | | - Dayong Si
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Alannah M Rickerby
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Kengo Deguchi
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Makoto Hibi
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Koichi Tanaka
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Michiki Takeuchi
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Kyoto University, Kyoto, Japan
| | - Anthony M Poole
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
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Fujii H, Hibi M, Shimizu S, Yokozeki K, Ogawa J. Three enzymes of Rhizobium radiobacter involved in the novel metabolism of two naturally occurring bioactive oxidative derivatives of L-isoleucine. Biosci Biotechnol Biochem 2022; 86:1247-1254. [PMID: 35793557 DOI: 10.1093/bbb/zbac111] [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: 04/10/2022] [Accepted: 06/27/2022] [Indexed: 11/13/2022]
Abstract
Rhizobium radiobacter C58 was found to convert 4-hydroxyisoleucine (HIL) and 2-amino-3-methyl-4-ketopentanoate (AMKP), bioactive oxidative derivatives of L-isoleucine, in both cases producing 2-aminobutyrate. Three native enzymes involved in these metabolisms were purified by column chromatography and successfully identified. In this strain, HIL was converted to acetaldehyde and 2-aminobutyrate by coupling action of the transaminase rrIlvE and the aldolase HkpA. AMKP was also converted to acetate and 2-aminobutyrate by coupling action of rrIlvE and a hydrolase DkhA. In the multi-enzymatic reactions, HkpA catalyzes the retro-aldol reaction of 4-hydroxy-3-methyl-2-ketopentanoate into acetaldehyde and 2-ketobutyrate, and DkhA catalyzes hydrolytic cleavage of the carbon-carbon bond of 2,4-diketo-3-methylpentanoate into acetate and 2-ketobutyrate. And rrIlvE catalyzes reversible transamination between HIL and 4-hydroxy-3-methyl-2-ketopentanoate, AMKP and 2,4-diketo-3-methylpentanoate, and 2-ketobutyrate and 2-aminobutyrate. The results suggested that the conversion activity of Rhizobium bacteria play an important role in the complex biological metabolic networks associated with HIL and AMKP.
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Affiliation(s)
- Hidemi Fujii
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Makoto Hibi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, Japan
| | - Sakayu Shimizu
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Kenzo Yokozeki
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan.,Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., Suzuki-cho, Kawasaki-ku, Kawasaki, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan
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Mizutani T, Hara R, Iihoshi T, Kozono S, Takeuchi M, Hibi M, Takahashi S, Ueda M, Ogawa J. Identification of tryptophanase from Escherichia coli for the synthesis of S-allyl-l-cysteine and related S-substituted cysteine derivatives. J Biosci Bioeng 2022; 134:182-186. [PMID: 35764447 DOI: 10.1016/j.jbiosc.2022.06.001] [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: 04/06/2022] [Revised: 06/05/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022]
Abstract
A wide variety of S-substituted cysteine derivatives occur in plant metabolites. For example, S-allyl-l-cysteine (SAC), mainly contained in garlic, gathers huge interest because of its favorable bioactivities for human health. However, conventional methods for preparing SAC suffer from several drawbacks with regard to efficiency and toxicity, which highlights the need for improved processes for SAC synthesis. This study aims to develop a novel bioprocess to produce SAC by microbial enzymes from easily available substrates. We found that Escherichia coli had the ability to synthesize SAC from allyl mercaptan, pyruvic acid, and ammonium sulfate. An enzyme purification through 3-step column chromatography, followed by determination of the N-terminal amino acid sequence revealed that tryptophanase (TnaA) was the enzyme responsible for SAC formation. Although the enzyme catalyzed the reversible reaction for synthesizing and degrading SAC, the degradation proceeded significantly faster than the synthesis. Interestingly, TnaA catalyzed the synthesis of a wide range of S-substituted cysteines with alkyl chains or aromatic rings, some of which are present in Allium and Petiveria plants. Our results showed a novel substrate specificity of TnaA toward various S-substituted cysteine. TnaA is a promising biocatalyst for developing a new process to supply various valuable S-substituted cysteine derivatives for medicinal and health-promoting applications.
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Affiliation(s)
- Taku Mizutani
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Ryotaro Hara
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takayuki Iihoshi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shoko Kozono
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Michiki Takeuchi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Hibi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan; Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Satomi Takahashi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Ueda
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, 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 Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
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Mizutani T, Hara R, Takeuchi M, Yamagishi K, Hirao Y, Mori K, Hibi M, Ueda M, Ogawa J. l-Tryptophan-starved cultivation enhances S-allyl-l-cysteine synthesis in various food-related microorganisms. Biosci Biotechnol Biochem 2022; 86:792-799. [PMID: 35388878 DOI: 10.1093/bbb/zbac044] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/16/2022] [Indexed: 11/13/2022]
Abstract
S-Allyl-l-cysteine (SAC) has received much interest due to its beneficial effects on human health. To satisfy the increasing demand for SAC, this study aims to develop a valuable culturing method for microbial screening synthesizing SAC from readily available materials. Although tryptophan synthase is a promising enzyme for SAC synthesis, its expression in microorganisms is strictly regulated by environmental l-tryptophan. Thus, we constructed a semisynthetic medium lacking l-tryptophan using casamino acids. This medium successfully enhanced the SAC-synthesizing activity of Lactococcus lactis ssp. cremoris NBRC 100676. In addition, microorganisms with high SAC-synthesizing activity were screened by the same medium. Food-related Klebsiella pneumoniae K-15 and Pantoea agglomerans P-3 were found to have a significantly increased SAC-synthesizing activity. The SAC-producing process established in this study is shorter in duration than the conventional garlic aging method. Furthermore, this study proposes a promising alternative strategy for producing food-grade SAC by microorganisms.
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Affiliation(s)
- Taku Mizutani
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Ryotaro Hara
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Michiki Takeuchi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Kazuo Yamagishi
- Research Institute for Bioscience Products and Fine Chemicals, AJINOMOTO CO., INC., Kawasaki, Kanagawa, Japan
| | - Yoshinori Hirao
- Research Institute for Bioscience Products and Fine Chemicals, AJINOMOTO CO., INC., Kawasaki, Kanagawa, Japan
| | - Kenichi Mori
- Research Institute for Bioscience Products and Fine Chemicals, AJINOMOTO CO., INC., Kawasaki, Kanagawa, Japan
| | - Makoto Hibi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan
| | - Makoto Ueda
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, Japan.,Department of Materials Chemistry and Bioengineering, National Institute of Technology, Oyama College, Oyama, Tochigi, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, Japan
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Kozono I, Takeuchi M, Kozono S, Satomura A, Aoki W, Hibi M, Ogawa J. Characterization of xanthine oxidase from Cellulosimicrobium funkei possessing hypoxanthine-metabolizing activity. J Appl Microbiol 2020; 130:2132-2140. [PMID: 33090589 DOI: 10.1111/jam.14891] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/19/2020] [Accepted: 10/02/2020] [Indexed: 11/29/2022]
Abstract
AIMS Purine-degrading enzymes are favourable as medications and diagnostic tools for hyperuricemia. This study aimed to characterize enzymes isolated from micro-organisms, which may be useful for developing a new prophylaxis for hyperuricemia. METHODS AND RESULTS Cellulosimicrobium funkei A153 was found to be a good catalyst for hypoxanthine degradation and could oxidize hypoxanthine to xanthine and further to uric acid. The enzyme catalysing this oxidation was purified, and its partial amino acid sequences were examined. Based on this information and genome sequencing results, this xanthine dehydrogenase family protein was cloned and expressed in Rhodococcus erythropolis L88. The recombinant enzyme with a His-tag was characterized. The enzyme was a xanthine oxidase as it could utilize molecular oxygen as an electron acceptor. It was stable under 50°C and exhibited maximum activity at pH 7·0. The kcat , Km and kcat /Km values for xanthine were 1·4 s-1 , 0·22 mmol l-1 and 6·4 s-1 mmol-1 l, respectively. CONCLUSIONS Xanthine oxidase is favourable for hyperuricemia medication because it oxidizes hypoxanthine, an easily adsorbed purine, to xanthine and further to uric acid, which are hardly adsorbed purines. SIGNIFICANCE AND IMPACT OF THE STUDY The enzyme is useful for decreasing serum uric acid levels via conversion of easily absorbed purines to hardly absorbed purines in the intestine. Enzymes from micro-organisms may be used as a novel prophylaxis for hyperuricemia.
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Affiliation(s)
- I Kozono
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - M Takeuchi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - S Kozono
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - A Satomura
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - W Aoki
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - M Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.,Department of Biotechnology, Biotechnology Research Center, Toyama Prefectural University, Toyama, Japan
| | - J Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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Kozono I, Hibi M, Takeuchi M, Ogawa J. Purification and characterization of molybdenum-containing aldehyde dehydrogenase that oxidizes benzyl maltol derivative from Pseudomonas nitroreducens SB32154. Biosci Biotechnol Biochem 2020; 84:2390-2400. [PMID: 32729393 DOI: 10.1080/09168451.2020.1799749] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Maltol derivatives are used in a variety of fields due to their metal-chelating abilities. In the previous study, it was found that cytochrome P450 monooxygenase, P450nov, which has the ability to effectively convert the 2-methyl group in a maltol derivative, transformed 3-benzyloxy-2-methyl-4-pyrone (BMAL) to 2-(hydroxymethyl)-3-(phenylmethoxy)-4H-pyran-4-one (BMAL-OH) and slightly to 3-benzyloxy-4-oxo-4 H-pyran-2-carboxaldehyde (BMAL-CHO). We isolated Pseudomonas nitroreducens SB32154 with the ability to convert BMAL-CHO to BMAL-COOH from soil. The enzyme responsible for aldehyde oxidation, a BMAL-CHO dehydrogenase, was purified from P. nitroreducens SB32154 and characterized. The purified BMAL-CHO dehydrogenase was found to be a xanthine oxidase family enzyme with unique structure of heterodimer composed of 75 and 15 kDa subunits containing a molybdenum cofactor and [Fe-S] clusters, respectively. The enzyme showed broad substrate specificity toward benzaldehyde derivatives. Furthermore, one-pot conversion of BMAL to BMAL-COOH via BMAL-CHO by the combination of the BMAL-CHO dehydrogenase with P450nov was achieved.
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Affiliation(s)
- Iori Kozono
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University , Kyoto, Japan.,Medicinal Chemistry Research Laboratory, Shionogi & Co., Ltd ., Osaka, Japan
| | - Makoto Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University , Kyoto, Japan.,Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University , Toyama, Japan
| | - Michiki Takeuchi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University , Kyoto, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University , Kyoto, Japan.,Research Unit for Physiological Chemistry, Kyoto University , Kyoto, Japan
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Urabe D, Fukaya K, Kono Y, Hibi M, Asano Y. A New Entry to the Synthesis of (±)-β-Lysine. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)38] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hibi M, Takahashi K, Kako J, Wakita Y, Kodera T, Shimizu S, Yokozeki K, Ogawa J. Attempt to simultaneously generate three chiral centers in 4-hydroxyisoleucine with microbial carbonyl reductases. Bioorg Med Chem 2018; 26:1327-1332. [PMID: 28698052 DOI: 10.1016/j.bmc.2017.06.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 02/06/2017] [Revised: 06/13/2017] [Accepted: 06/27/2017] [Indexed: 11/25/2022]
Abstract
A panel of microorganisms was screened for selective reduction ability towards a racemic mixture of prochiral 2-amino-3-methyl-4-ketopentanoate (rac-AMKP). Several of the microorganisms tested produced greater than 0.5mM 4-hydroxyisoleucine (HIL) from rac-AMKP, and the stereoselectivity of HIL formation was found to depend on the taxonomic category to which the microorganism belonged. The enzymes responsible for the AMKP-reducing activity, ApAR and FsAR, were identified from two of these microorganisms, Aureobasidium pullulans NBRC 4466 and Fusarium solani TG-2, respectively. Three AMKP reducing enzymes, ApAR, FsAR, and the previously reported BtHILDH, were reacted with rac-AMKP, and each enzyme selectively produced a specific composition of HIL stereoisomers. The enzymes appeared to have different characteristics in recognition of the stereostructure of the substrate AMKP and in control of the 4-hydroxyl group configuration in the HIL product.
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Affiliation(s)
- Makoto Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan; Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Koji Takahashi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Junko Kako
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yuuta Wakita
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tomohiro Kodera
- Institute of Food Sciences & Technologies Flavor Innovation Group, Ajinomoto Co, Inc, 1-1, Suzuki-cho, Kawasaki-ku, Kawasaki 210-8681, Japan
| | - Sakayu Shimizu
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kenzo Yokozeki
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
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Aritake-Okada S, Tanabe K, Mochizuki Y, Ochiai R, Hibi M, Kozuma K, Katsuragi Y, Ganeko M, Takeda N, Uchida S. 0066 DIURNAL REPEATED PHYSICAL EXERCISE PROMOTES SLOW WAVE ACTIVITY AND FAST-SIGMA POWER IN ACCORDANCE WITH CHANGE OF DISTAL PROXIMAL SKIN TEMPERATURE GRADIENT AND CORE BODY TEMPERATURE DURING NOCTURNAL SLEEP. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.065] [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: 11/14/2022] Open
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11
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Mitsukawa Y, Hibi M, Matsutani N, Horinouchi N, Takahashi S, Ogawa J. Enzymatic synthesis of 2'-O-methylribonucleosides with a nucleoside hydrolase family enzyme from Lactobacillus buchneri LBK78. J Biosci Bioeng 2017; 123:659-664. [PMID: 28202305 DOI: 10.1016/j.jbiosc.2017.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 11/16/2016] [Revised: 12/25/2016] [Accepted: 01/10/2017] [Indexed: 10/20/2022]
Abstract
2'-O-Methylribonucleosides (2'-OMe-NRs) are promising raw materials for the production of nucleic acid drugs. We previously reported that LbNH, a nucleoside hydrolase from Lactobacillus buchneri LBK78 (NITE P-01581), was the first enzyme found to act on 2'-OMe-NRs. In the present study, we determined that LbNH also has the transribosylation activity between 2'-OMe-NRs and nucleobases, in addition to the hydrolyzing activity towards 2'-OMe-NRs. When 2'-O-methyluridine (2'-OMe-UR) and adenine were reacted with LbNH, 2'-O-methyladenosine (2'-OMe-AR) was produced. LbNH preferred purine nucleobases as its acceptor substrates for the transribosylation with 2'-OMe-UR as a donor substrate. Kinetic analysis of LbNH revealed that adenine behaved as a mixed inhibitor of the hydrolysis of 2'-OMe-UR. Under the optimal reaction conditions, the maximum molar yield of enzymatic 2'-OMe-AR produced reached 0.97% towards 2'-OMe-UR, corresponding to 0.16 g/L.
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Affiliation(s)
- Yuuki Mitsukawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Narihiro Matsutani
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Nobuyuki Horinouchi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Satomi Takahashi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
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Hibi M, Oishi S, Matsushita M, Yoneshiro T, Yamaguchi T, Usui C, Yasunaga K, Katsuragi Y, Kubota K, Tanaka S, Saito M. Brown adipose tissue is involved in diet-induced thermogenesis and whole-body fat utilization in healthy humans. Int J Obes (Lond) 2016; 40:1655-1661. [PMID: 27430878 PMCID: PMC5116053 DOI: 10.1038/ijo.2016.124] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/06/2016] [Accepted: 06/23/2016] [Indexed: 12/17/2022]
Abstract
Background/Objectives: Brown adipose tissue (BAT) is a potential therapeutic target against obesity and diabetes through thermogenesis and substrate disposal with cold exposure. The role of BAT in energy metabolism under thermoneutral conditions, however, remains controversial. We assessed the contribution of BAT to energy expenditure (EE), particularly diet-induced thermogenesis (DIT), and substrate utilization in human adults. Methods: In this cross-sectional study, BAT activity was evaluated in 21 men using 18F-fluoro-2-deoxy-D-glucose positron emission tomography combined with computed tomography (18F-FDG-PET/CT) after cold exposure (19 °C). The subjects were divided into BAT-positive (n=13) and BAT-negative (n=8) groups according to the 18F-FDG-PET/CT findings. Twenty-four hour EE, DIT and respiratory quotient were measured using a whole-room indirect calorimeter at 27 °C. Results: Body composition, blood metabolites and 24-h EE did not differ between groups. DIT (%), calculated as DIT divided by total energy intake, however, was significantly higher in the BAT-positive group (BAT-positive: 9.7±2.5%, BAT-negative: 6.5±4.0%, P=0.03). The 24-h respiratory quotient was significantly lower (P=0.03) in the BAT-positive group (0.861±0.027) than in the BAT-negative group (0.889±0.024). Conclusion: DIT and fat utilization were higher in BAT-positive subjects compared to BAT-negative subjects, suggesting that BAT has a physiologic role in energy metabolism.
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Affiliation(s)
- M Hibi
- Health Care Food Research Laboratories, Kao Corporation, Tokyo, Japan
| | - S Oishi
- Health Care Food Research Laboratories, Kao Corporation, Tokyo, Japan
| | - M Matsushita
- Department of Nutrition, Tenshi College, Sapporo, Japan
| | - T Yoneshiro
- Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - T Yamaguchi
- Health Care Food Research Laboratories, Kao Corporation, Tokyo, Japan
| | - C Usui
- Department of Nutritional Science, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan
| | - K Yasunaga
- Health Care Food Research Laboratories, Kao Corporation, Tokyo, Japan
| | - Y Katsuragi
- Health Care Food Research Laboratories, Kao Corporation, Tokyo, Japan
| | - K Kubota
- Division of Nuclear Medicine, Department of Radiology, National Center for Global Health and Medicine, Tokyo, Japan
| | - S Tanaka
- Department of Nutritional Science, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan
| | - M Saito
- Department of Nutrition, Tenshi College, Sapporo, Japan
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Takeuchi M, Kishino S, Park SB, Kitamura N, Watanabe H, Saika A, Hibi M, Yokozeki K, Ogawa J. Production of dicarboxylic acids from novel unsaturated fatty acids by laccase-catalyzed oxidative cleavage. Biosci Biotechnol Biochem 2016; 80:2132-2137. [PMID: 27352072 DOI: 10.1080/09168451.2016.1200457] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 10/21/2022]
Abstract
The establishment of renewable biofuel and chemical production is desirable because of global warming and the exhaustion of petroleum reserves. Sebacic acid (decanedioic acid), the material of 6,10-nylon, is produced from ricinoleic acid, a carbon-neutral material, but the process is not eco-friendly because of its energy requirements. Laccase-catalyzing oxidative cleavage of fatty acid was applied to the production of dicarboxylic acids using hydroxy and oxo fatty acids involved in the saturation metabolism of unsaturated fatty acids in Lactobacillus plantarum as substrates. Hydroxy or oxo fatty acids with a functional group near the carbon-carbon double bond were cleaved at the carbon-carbon double bond, hydroxy group, or carbonyl group by laccase and transformed into dicarboxylic acids. After 8 h, 0.58 mM of sebacic acid was produced from 1.6 mM of 10-oxo-cis-12,cis-15-octadecadienoic acid (αKetoA) with a conversion rate of 35% (mol/mol). This laccase-catalyzed enzymatic process is a promising method to produce dicarboxylic acids from biomass-derived fatty acids.
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Affiliation(s)
- Michiki Takeuchi
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Shigenobu Kishino
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Si-Bum Park
- b Industrial Microbiology , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Nahoko Kitamura
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Hiroko Watanabe
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Azusa Saika
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Makoto Hibi
- b Industrial Microbiology , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Kenzo Yokozeki
- b Industrial Microbiology , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
| | - Jun Ogawa
- a Division of Applied Life Sciences , Graduate School of Agriculture, Kyoto University , Kyoto , Japan.,c Research Unit for Physiological Chemistry , Kyoto University , Kyoto , Japan
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Mitsukawa Y, Hibi M, Matsutani N, Horinouchi N, Takahashi S, Ogawa J. A novel nucleoside hydrolase from Lactobacillus buchneri LBK78 catalyzing hydrolysis of 2'-O-methylribonucleosides. Biosci Biotechnol Biochem 2016; 80:1568-76. [PMID: 27180876 DOI: 10.1080/09168451.2016.1182853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/21/2022]
Abstract
2'-O-Methylribonucleosides (2'-OMe-NRs) are promising raw materials for nucleic acid drugs because of their high thermal stability and nuclease tolerance. In the course of microbial screening for metabolic activity toward 2'-OMe-NRs, Lactobacillus buchneri LBK78 was found to decompose 2'-O-methyluridine (2'-OMe-UR). The enzyme responsible was partially purified from L. buchneri LBK78 cells by a four-step purification procedure, and identified as a novel nucleoside hydrolase. This enzyme, LbNH, belongs to the nucleoside hydrolase superfamily, and formed a homotetrameric structure composed of subunits with a molecular mass around 34 kDa. LbNH hydrolyzed 2'-OMe-UR to 2'-O-methylribose and uracil, and the kinetic constants were Km of 0.040 mM, kcat of 0.49 s(-1), and kcat/Km of 12 mM(-1) s(-1). In a substrate specificity analysis, LbNH preferred ribonucleosides and 2'-OMe-NRs as its hydrolytic substrates, but reacted weakly with 2'-deoxyribonucleosides. In a phylogenetic analysis, LbNH showed a close relationship with purine-specific nucleoside hydrolases from trypanosomes.
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Affiliation(s)
- Yuuki Mitsukawa
- a Division of Applied Life Sciences, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
| | - Makoto Hibi
- b Industrial Microbiology, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
| | - Narihiro Matsutani
- a Division of Applied Life Sciences, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
| | - Nobuyuki Horinouchi
- a Division of Applied Life Sciences, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
| | - Satomi Takahashi
- b Industrial Microbiology, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
| | - Jun Ogawa
- a Division of Applied Life Sciences, Graduate School of Agriculture , Kyoto University , Sakyo-ku, Kyoto , Japan
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Kawakami K, Asakawa K, Hibi M, Itoh M, Muto A, Wada H. Gal4 Driver Transgenic Zebrafish. Genetics, Genomics and Fish Phenomics 2016; 95:65-87. [DOI: 10.1016/bs.adgen.2016.04.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Hibi M, Kasahara T, Kawashima T, Yajima H, Kozono S, Smirnov SV, Kodera T, Sugiyama M, Shimizu S, Yokozeki K, Ogawa J. Cover Picture: Multi-Enzymatic Synthesis of Optically Pure β-Hydroxy α-Amino Acids (Adv. Synth. Catal. 4/2015). Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500107] [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: 11/09/2022]
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17
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Hibi M, Kasahara T, Kawashima T, Yajima H, Kozono S, Smirnov SV, Kodera T, Sugiyama M, Shimizu S, Yokozeki K, Ogawa J. Multi-Enzymatic Synthesis of Optically Pure β-Hydroxy α-Amino Acids. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400672] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Kimura T, Ishikawa C, Osorio-Lozada A, Robins KT, Hibi M, Ogawa J. Production of a pharmaceutical intermediate via biohydroxylation using whole cells of Rhodococcus rubropertinctus N82. Biosci Biotechnol Biochem 2014; 78:1772-6. [DOI: 10.1080/09168451.2014.925781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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
Rhodococcus rubropertinctus N82 possesses unique regiospecific hydroxylation activity in biotransformation of compounds. In this study, the ability of whole cells of the strain R. rubropertinctus N82 in biotransformation was studied. The hydroxylation activity resulted in transforming 6,7-dihydro-4H-thieno[3,2-c]-pyridine-5-carboxylic acid tert-butyl ester (LS1) into 2-hydroxy-6,7-dihydro-4H-thieno[3,2-c]-pyridine-5-carboxylic acid tert-butyl ester (LP1), a pharmaceutical intermediate. By optimizing conditions for the hydroxylating biotransformation using whole cells of R. rubropertinctus N82 as biocatalyst, 3.3 mM LP1 was successfully produced from 4 mM LS1 with a molar yield of 83%. Thus, effective method was newly developed to produce LP1, which is a synthetic intermediate of a platelet inhibitor active pharmaceutical ingredient drug, prasugrel.
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Affiliation(s)
- Takatoshi Kimura
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Chihiro Ishikawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | | | | | - Makoto Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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Yoshiyama Y, Tanaka K, Yoshiyama K, Hibi M, Ogawa J, Shima J. Trehalose accumulation enhances tolerance of Saccharomyces cerevisiae to acetic acid. J Biosci Bioeng 2014; 119:172-5. [PMID: 25060731 DOI: 10.1016/j.jbiosc.2014.06.021] [Citation(s) in RCA: 23] [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: 12/27/2013] [Revised: 06/25/2014] [Accepted: 06/27/2014] [Indexed: 01/06/2023]
Abstract
Trehalose confers protection against various environmental stresses on yeast cells. In this study, trehalase gene deletion mutants that accumulate trehalose at high levels showed significant stress tolerance to acetic acid. The enhancement of trehalose accumulation can thus be considered a target in the breeding of acetic acid-tolerant yeast strains.
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Affiliation(s)
- Yoko Yoshiyama
- Research Division of Microbial Sciences, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Koichi Tanaka
- Research Division of Microbial Sciences, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kohei Yoshiyama
- River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Makoto Hibi
- Industrial Microbiology, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Jun Shima
- Research Division of Microbial Sciences, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto 606-8502, Japan.
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20
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Qin HM, Miyakawa T, Nakamura A, Hibi M, Ogawa J, Tanokura M. Structural optimization of SadA, an Fe(II)- and α-ketoglutarate-dependent dioxygenase targeting biocatalytic synthesis of N-succinyl-L-threo-3,4-dimethoxyphenylserine. Biochem Biophys Res Commun 2014; 450:1458-61. [PMID: 25017911 DOI: 10.1016/j.bbrc.2014.07.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 06/25/2014] [Accepted: 07/02/2014] [Indexed: 11/27/2022]
Abstract
L-threo-3,4-Dihydroxyphenylserine (l-DOPS, Droxidopa) is a psychoactive drug and synthetic amino acid precursor that acts as a prodrug to the neurotransmitters. SadA, a dioxygenase from Burkholderia ambifaria AMMD, is an Fe(II)- and α-ketoglutarate (KG)-dependent enzyme that catalyzes N-substituted branched-chain or aromatic l-amino acids. SadA is able to produce N-succinyl-l-threo-3,4-dimethoxyphenylserine (NSDOPS), which is a precursor of l-DOPS, by catalyzing the hydroxylation of N-succinyl-3,4-dimethoxyphenylalanine (NSDOPA). However, the catalytic activity of SadA toward NSDOPS is much lower than that toward N-succinyl branched-chain l-amino acids. Here, we report an improved biocatalytic synthesis of NSDOPS with SadA. Structure-based protein engineering was applied to improve the α-KG turnover activity for the synthesis of NSDOPS. The G79A, G79A/F261W or G79A/F261R mutant showed a more than 6-fold increase in activity compared to that of the wild-type enzyme. The results provide a new insight into the substrate specificity toward NSDOPA and will be useful for the rational design of SadA mutants as a target of industrial biocatalysts.
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Affiliation(s)
- Hui-Min Qin
- 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
| | - Takuya Miyakawa
- 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
| | - Akira Nakamura
- 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
| | - Makoto Hibi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Masaru Tanokura
- 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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Hibi M, Ogawa J. Characteristics and biotechnology applications of aliphatic amino acid hydroxylases belonging to the Fe(II)/α-ketoglutarate-dependent dioxygenase superfamily. Appl Microbiol Biotechnol 2014; 98:3869-76. [PMID: 24682483 DOI: 10.1007/s00253-014-5620-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 02/14/2014] [Accepted: 02/14/2014] [Indexed: 11/28/2022]
Abstract
The asymmetric hydroxylation of inactive carbon atoms is still an important reaction in the industrial synthesis of valuable chiral compounds such as pharmaceuticals and fine chemicals. Applications of monooxygenation enzymes, like cytochrome P450 monooxygenases, flavin-containing monooxygenases, and Fe(II)/α-ketoglutarate-dependent dioxygenases (Fe/αKG-DOs), are strongly desired as hydroxylation biocatalysts because they have great advantages in regio- and stereoselectivity of the reactions. Recently, several novel Fe/αKG-DOs have been found to catalyze the asymmetric hydroxylation of aliphatic amino acids. Depending on their amino acid sequences, these Fe/αKG-DOs catalyze different types of regioselective hydroxylations, or C3-, C4-, and C5-hydroxylation. Additionally, most also have stereoselective sulfoxidation activities. Here, we have reviewed the characterization and process development of this novel functioning group of Fe/αKG-DOs.
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Affiliation(s)
- Makoto Hibi
- Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
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So K, Kawai S, Hamano Y, Kitazumi Y, Shirai O, Hibi M, Ogawa J, Kano K. Improvement of a direct electron transfer-type fructose/dioxygen biofuel cell with a substrate-modified biocathode. Phys Chem Chem Phys 2014; 16:4823-9. [DOI: 10.1039/c3cp54888k] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hibi M, Kawashima T, Yajima H, Smirnov SV, Kodera T, Sugiyama M, Shimizu S, Yokozeki K, Ogawa J. Enzymatic synthesis of chiral amino acid sulfoxides by Fe(II)/α-ketoglutarate-dependent dioxygenase. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.07.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qin HM, Miyakawa T, Jia MZ, Nakamura A, Ohtsuka J, Xue YL, Kawashima T, Kasahara T, Hibi M, Ogawa J, Tanokura M. Crystal structure of a novel N-substituted L-amino acid dioxygenase from Burkholderia ambifaria AMMD. PLoS One 2013; 8:e63996. [PMID: 23724013 PMCID: PMC3665795 DOI: 10.1371/journal.pone.0063996] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 04/09/2013] [Indexed: 12/01/2022] Open
Abstract
A novel dioxygenase from Burkholderia ambifaria AMMD (SadA) stereoselectively catalyzes the C3-hydroxylation of N-substituted branched-chain or aromatic L-amino acids, especially N-succinyl-L-leucine, coupled with the conversion of α-ketoglutarate to succinate and CO2. To elucidate the structural basis of the substrate specificity and stereoselective hydroxylation, we determined the crystal structures of the SadA.Zn(II) and SadA.Zn(II).α-KG complexes at 1.77 Å and 1.98 Å resolutions, respectively. SadA adopted a double-stranded β-helix fold at the core of the structure. In addition, an HXD/EXnH motif in the active site coordinated a Zn(II) as a substitute for Fe(II). The α-KG molecule also coordinated Zn(II) in a bidentate manner via its 1-carboxylate and 2-oxo groups. Based on the SadA.Zn(II).α-KG structure and mutation analyses, we constructed substrate-binding models with N-succinyl-L-leucine and N-succinyl-L-phenylalanine, which provided new insight into the substrate specificity. The results will be useful for the rational design of SadA variants aimed at the recognition of various N-succinyl L-amino acids.
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Affiliation(s)
- Hui-Min Qin
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Takuya Miyakawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Min Ze Jia
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Akira Nakamura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Jun Ohtsuka
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - You-Lin Xue
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Takashi Kawashima
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Takuya Kasahara
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Makoto Hibi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- * E-mail:
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Smirnov SV, Sokolov PM, Kotlyarova VA, Samsonova NN, Kodera T, Sugiyama M, Torii T, Hibi M, Shimizu S, Yokozeki K, Ogawa J. A novel l-isoleucine-4'-dioxygenase and l-isoleucine dihydroxylation cascade in Pantoea ananatis. Microbiologyopen 2013; 2:471-81. [PMID: 23554367 PMCID: PMC3684760 DOI: 10.1002/mbo3.87] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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: 01/08/2013] [Revised: 02/24/2013] [Accepted: 03/06/2013] [Indexed: 01/18/2023] Open
Abstract
A unique operon structure has been identified in the genomes of several plant- and insect-associated bacteria. The distinguishing feature of this operon is the presence of tandem hilA and hilB genes encoding dioxygenases belonging to the PF13640 and PF10014 (BsmA) Pfam families, respectively. The genes encoding HilA and HilB from Pantoea ananatis AJ13355 were cloned and expressed in Escherichia coli. The culturing of E. coli cells expressing hilA (E. coli-HilA) or both hilA and hilB (E. coli-HilAB) in the presence of l-isoleucine resulted in the conversion of l-isoleucine into two novel biogenic compounds: l-4′-isoleucine and l-4,4′-dihydroxyisoleucine, respectively. In parallel, two novel enzymatic activities were detected in the crude cell lysates of the E. coli-HilA and E. coli-HilAB strains: l-isoleucine, 2-oxoglutarate: oxygen oxidoreductase (4′-hydroxylating) (HilA) and l-4′-hydroxyisoleucine, 2-oxoglutarate: oxygen oxidoreductase (4-hydroxylating) (HilB), respectively. Two hypotheses regarding the physiological significance of C-4(4′)-hydroxylation of l-isoleucine in bacteria are also discussed. According to first hypothesis, the l-isoleucine dihydroxylation cascade is involved in synthesis of dipeptide antibiotic in P. ananatis. Another unifying hypothesis is that the C-4(4′)-hydroxylation of l-isoleucine in bacteria could result in the synthesis of signal molecules belonging to two classes: 2(5H)-furanones and analogs of N-acyl homoserine lactone.
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Affiliation(s)
- Sergey V Smirnov
- Ajinomoto-Genetika Research Institute, 1st Dorozhny pr. 1, Moscow, 113545, Russia
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Isobe K, Satou S, Matsumoto E, Yoshida S, Yamada M, Hibi M, Ogawa J. Characterization and application of a L-specific amino acid oxidase from Rhodococcus sp. AIU LAB-3. J Biosci Bioeng 2013; 115:613-7. [PMID: 23294577 DOI: 10.1016/j.jbiosc.2012.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 12/02/2012] [Accepted: 12/04/2012] [Indexed: 10/27/2022]
Abstract
An L-specific amino acid oxidase (L-AAO) suitable for assay of N-acyl-L-amino acid amidohydrolase (L-aminoacylase) activity was purified from Rhodococcus sp. AIU LAB-3. The enzyme exhibited broad substrate specificity and catalyzed an oxidative deamination of the a-amino group of L-amino acids. The optimal enzyme activities for L-amino acids tested were observed in the pH range from 6.0 to 8.5, and more than 80% of the maximum activity was obtained at pH 7.5. The enzyme was stable in the pH range from 7.0 to 8.5, and the apparent Km values for those L-amino acids were small. We, therefore, developed a new enzymatic method for assay of L-aminoacylase activity using the L-AAO at pH 7.5. The new enzymatic method had advantages that the L-aminoacylase reaction was spectrophotometrically followed by measuring absorbance at 555 nm. The L-aminoacylase activity was assayed within 10 min using a small reaction volume. Thus, the new enzymatic method was simple and sensitive compared to the ninhydrin method.
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Affiliation(s)
- Kimiyasu Isobe
- Department of Biological Chemistry and Food Sciences, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan.
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Hibi M, Kawashima T, Kasahara T, Sokolov P, Smirnov S, Kodera T, Sugiyama M, Shimizu S, Yokozeki K, Ogawa J. A novel Fe(II)/α-ketoglutarate-dependent dioxygenase fromBurkholderia ambifariahas β-hydroxylating activity ofN-succinyl l-leucine. Lett Appl Microbiol 2012; 55:414-9. [DOI: 10.1111/j.1472-765x.2012.03308.x] [Citation(s) in RCA: 24] [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: 11/26/2022]
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Qin HM, Miyakawa T, Nakamura A, Xue YL, Kawashima T, Kasahara T, Hibi M, Ogawa J, Tanokura M. Expression, purification, crystallization and preliminary X-ray analysis of a novel N-substituted branched-chain L-amino-acid dioxygenase from Burkholderia ambifaria AMMD. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:1067-1069. [PMID: 22949196 PMCID: PMC3433199 DOI: 10.1107/s1744309112031508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 07/10/2012] [Indexed: 06/01/2023]
Abstract
Ferrous ion- and α-ketoglutarate-dependent dioxygenase from Burkholderia ambifaria AMMD (SadA) catalyzes the C3-hydroxylation of N-substituted branched-chain L-amino acids, especially N-succinyl-L-leucine, coupled to the conversion of α-ketoglutarate to succinate and CO(2). SadA was expressed in Escherichia coli, purified and crystallized using the sitting-drop vapour-diffusion method at 293 K. Crystals of selenomethionine-substituted SadA were obtained using a reservoir solution containing PEG 3000 as the precipitant at pH 9.5 and diffracted X-rays to 2.4 Å resolution. The crystal belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 49.3, b = 70.9, c = 148.2 Å. The calculated Matthews coefficient (V(M) = 2.1 Å(3) Da(-1), 41% solvent content) suggested that the crystal contains two molecules per asymmetric unit.
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Affiliation(s)
- Hui-Min Qin
- 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
| | - Takuya Miyakawa
- 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
| | - Akira Nakamura
- 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
| | - You-Lin Xue
- 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
| | - Takashi Kawashima
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takuya Kasahara
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Hibi
- Laboratory of Industrial Microbiology, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masaru Tanokura
- 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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Guo L, Okai M, Mase T, Imai FL, Miyakawa T, Nagata K, Yamanaka H, Fujii H, Hibi M, Ogawa J, Tanokura M. Expression, purification, crystallization and preliminary X-ray analysis of 4-hydroxy-3-methyl-2-keto-pentanoate aldolase (asHPAL) from Arthrobacter simplex strain AKU 626. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:958-61. [PMID: 22869132 DOI: 10.1107/s1744309112028278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 06/21/2012] [Indexed: 11/10/2022]
Abstract
4-Hydroxy-3-methyl-2-keto-pentanoate aldolase (asHPAL), an enzyme used in the synthesis of (2S,3R,4S)-4-hydroxyisoleucine, was crystallized in the absence and the presence of 2-ketobutyrate as one of its substrates by the sitting-drop vapour-diffusion method using PEG 400 as a precipitant. Crystals of asHPAL grown without and with 2-ketobutyrate diffracted to 1.60 and 1.55 Å resolution and belonged to space group C2, with unit-cell parameters a = 116.8, b = 88.2, c = 85.3 Å, β = 122.3° and a = 116.2, b = 88.1, c = 85.0 Å, β = 122.3°, respectively.
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Affiliation(s)
- Linjun Guo
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Hibi M, Hatahira S, Nakatani M, Yokozeki K, Shimizu S, Ogawa J. Extracellular oxidases of Cerrena sp. complementarily functioning in artificial dye decolorization including laccase, manganese peroxidase, and novel versatile peroxidases. Biocatalysis and Agricultural Biotechnology 2012. [DOI: 10.1016/j.bcab.2012.03.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hibi M, Mano J, Hagishita T, Shima J, Shimizu S, Ogawa J. β-Aryl-β-amino acid aminotransferase from Variovorax sp. JH2 is useful for enantioselective β-phenylalanine production. Biocatalysis and Agricultural Biotechnology 2012. [DOI: 10.1016/j.bcab.2012.04.001] [Citation(s) in RCA: 2] [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: 10/28/2022]
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Horinouchi N, Sakai T, Kawano T, Matsumoto S, Sasaki M, Hibi M, Shima J, Shimizu S, Ogawa J. Construction of microbial platform for an energy-requiring bioprocess: practical 2'-deoxyribonucleoside production involving a C-C coupling reaction with high energy substrates. Microb Cell Fact 2012; 11:82. [PMID: 22709572 PMCID: PMC3419699 DOI: 10.1186/1475-2859-11-82] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 04/17/2012] [Accepted: 06/15/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Reproduction and sustainability are important for future society, and bioprocesses are one technology that can be used to realize these concepts. However, there is still limited variation in bioprocesses and there are several challenges, especially in the operation of energy-requiring bioprocesses. As an example of a microbial platform for an energy-requiring bioprocess, we established a process that efficiently and enzymatically synthesizes 2'-deoxyribonucleoside from glucose, acetaldehyde, and a nucleobase. This method consists of the coupling reactions of the reversible nucleoside degradation pathway and energy generation through the yeast glycolytic pathway. RESULTS Using E. coli that co-express deoxyriboaldolase and phosphopentomutase, a high amount of 2'-deoxyribonucleoside was produced with efficient energy transfer under phosphate-limiting reaction conditions. Keeping the nucleobase concentration low and the mixture at a low reaction temperature increased the yield of 2'-deoxyribonucleoside relative to the amount of added nucleobase, indicating that energy was efficiently generated from glucose via the yeast glycolytic pathway under these reaction conditions. Using a one-pot reaction in which small amounts of adenine, adenosine, and acetone-dried yeast were fed into the reaction, 75 mM of 2'-deoxyinosine, the deaminated product of 2'-deoxyadenosine, was produced from glucose (600 mM), acetaldehyde (250 mM), adenine (70 mM), and adenosine (20 mM) with a high yield relative to the total base moiety input (83%). Moreover, a variety of natural dNSs were further synthesized by introducing a base-exchange reaction into the process. CONCLUSION A critical common issue in energy-requiring bioprocess is fine control of phosphate concentration. We tried to resolve this problem, and provide the convenient recipe for establishment of energy-requiring bioprocesses. It is anticipated that the commercial demand for dNSs, which are primary metabolites that accumulate at very low levels in the metabolic pool, will grow. The development of an efficient production method for these compounds will have a great impact in both fields of applied microbiology and industry and will also serve as a good example of a microbial platform for energy-requiring bioprocesses.
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Affiliation(s)
- Nobuyuki Horinouchi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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Smirnov SV, Sokolov PM, Kodera T, Sugiyama M, Hibi M, Shimizu S, Yokozeki K, Ogawa J. A novel family of bacterial dioxygenases that catalyse the hydroxylation of free L-amino acids. FEMS Microbiol Lett 2012; 331:97-104. [PMID: 22448874 DOI: 10.1111/j.1574-6968.2012.02558.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 03/04/2012] [Accepted: 03/22/2012] [Indexed: 11/27/2022] Open
Abstract
L-isoleucine-4-hydroxylase (IDO) is a recently discovered member of the Pfam family PF10014 (the former DUF 2257 family) of uncharacterized conserved bacterial proteins. To uncover the range of biochemical activities carried out by PF10014 members, eight in silico-selected IDO homologues belonging to the PF10014 were cloned and expressed in Escherichia coli. L-methionine, L-leucine, L-isoleucine and L-threonine were found to be catalysed by the investigated enzymes, producing L-methionine sulfoxide, 4-hydroxyleucine, 4-hydroxyisoleucine and 4-hydroxythreonine, respectively. An investigation of enzyme kinetics suggested the existence of a novel subfamily of bacterial dioxygenases within the PF10014 family for which free L-amino acids could be accepted as in vivo substrates. A hypothesis regarding the physiological significance of hydroxylated l-amino acids is also discussed.
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Kodera T, Smirnov SV, Samsonova NN, Kozlov YI, Koyama R, Hibi M, Ogawa J, Yokozeki K, Shimizu S. A novel l-isoleucine hydroxylating enzyme, l-isoleucine dioxygenase from Bacillus thuringiensis, produces (2S,3R,4S)-4-hydroxyisoleucine. Biochem Biophys Res Commun 2009; 390:506-10. [PMID: 19850012 DOI: 10.1016/j.bbrc.2009.09.126] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [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: 09/24/2009] [Accepted: 09/28/2009] [Indexed: 11/15/2022]
Abstract
The unique function of 4-hydroxyisoleucine (4-HIL) is to stimulate glucose-induced insulin secretion in a glucose-dependent manner. 4-HIL is distributed only in certain kinds of plants and mushrooms, but the biosynthetic mechanism of 4-HIL has not been elucidated. Moreover, 4-HIL-producing microorganisms have not been reported. l-isoleucine (l-Ile) hydroxylating activity producing 4-HIL was detected in a cell lysate of Bacillus thuringiensis strain 2e2 AKU 0251 obtained from the mid-late exponential phase of growth. Properties of the purified hydroxylase demonstrated that it is a alpha-ketoglutaric acid (alpha-KG) dependent l-Ile dioxygenase (IDO) and requires alpha-KG, ferric ion, and ascorbic acid for its maximum activity. IDO showed high stereoselectivity in l-Ile hydroxylation producing only (2S,3R,4S)-4-HIL. The N-terminal 22 amino acids sequence revealed high homology to a hypothetical protein (GenBank ID: RBTH_06809) in B. thuringiensis serovar israelensis ATCC 35646. The histidine motif, which is conserved in alpha-KG dependent dioxygenases, is found in RBTH_06809.
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Affiliation(s)
- Tomohiro Kodera
- Institute of Life Sciences, Ajinomoto Co, Inc, Suzuki-cho, Kawasaki-shi 210-8681, Japan.
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Hibi M, Takase H, Yasunaga K, Yamaguchi T, Shiiba D, Saito S, Yokoyama R, Kudo N, Katsuragi Y, Meguro S, Shimizu A, Tokimitsu I. Greater fat oxidation with diacylglycerol oil consumption for 14 days compared with triacylglycerol oil consumption in overweight men and women. Int J Obes (Lond) 2008; 32:1841-7. [PMID: 18936764 DOI: 10.1038/ijo.2008.197] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Several studies have reported increased fat oxidation with diacylglycerol (DAG) oil consumption. However, the effects of long-term DAG oil consumption on energy metabolism remain to be investigated. OBJECTIVE The objective of this study was to compare the effects of 14 days of either DAG or triacylglycerol (TAG) oil consumption on substrate oxidation, energy expenditure (EE) and dietary fat oxidation. DESIGN Eight males and six females participated in this randomized, double-blind, crossover feeding study. Each patient consumed the 14-day controlled test diet containing either 10 g day(-1) of DAG or TAG oil for acclimatization before a respiratory chamber measurement, followed by a 2-week washout period between diet treatments. Substrate oxidation and EE were measured in the respiratory chamber at the end of each dietary treatment. The patients consumed test oil as 15% of total caloric intake in the respiratory chamber (mean test oil intake was 36.1+/-6.6 g day(-1)). RESULTS Twenty-four hour fat oxidation was significantly greater with 14 days of DAG oil consumption compared with TAG oil consumption (78.6+/-19.6 and 72.6+/-14.9 g day(-1), respectively, P<0.05). There were no differences in body weight or body composition between diet treatments. Dietary fat oxidation was determined using the recovery rate of (13)CO(2) in breath, and was significantly enhanced with DAG oil consumption compared with TAG oil consumption, measured over 22 h after ingestion of (13)C-labelled triolein. Resting metabolic rate (RMR) was significantly greater with DAG oil consumption compared with TAG oil consumption (1766+/-337 and 1680+/-316 kcal day(-1), respectively, P<0.05). CONCLUSION Consumption of DAG oil for 14 days stimulates both fat oxidation and RMR compared with TAG oil consumption, which may explain the greater loss of body weight and body fat with DAG oil consumption that has been observed in weight-loss studies.
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Affiliation(s)
- M Hibi
- Health Care Food Research Laboratories, Kao Corporation, Sumida-ku, Tokyo, Japan.
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Kishimoto T, Hibi M, Murakami M, Narazaki M, Saito M, Taga T. The molecular biology of interleukin 6 and its receptor. Ciba Found Symp 2007; 167:5-16; discussion 16-23. [PMID: 1425018 DOI: 10.1002/9780470514269.ch2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Functional pleiotropy and redundancy are characteristic features of cytokines. Interleukin 6 (IL-6) is a typical example: IL-6 induces cellular differentiation or expression of tissue-specific genes; it is involved in processes such as antibody production in B cells, acute-phase protein synthesis in hepatocytes, megakaryocyte maturation, cytotoxic T cell differentiation, and neural differentiation of PC12 (pheochromocytoma) cells. It promotes growth of myeloma/plasmacytoma cells, T cells, keratinocytes and renal mesangial cells, and it inhibits growth of myeloid leukaemic cell lines and certain carcinoma cell lines. The IL-6 receptor consists of two polypeptide chains, a ligand-binding chain (IL-6R) and a non-ligand-binding, signal-transducing chain (gp130). Interaction of IL-6 with IL-6R triggers the association of gp130 and IL-6R, and the signal can be transduced through gp130. Association of gp130 with IL-6R is involved in the formation of high affinity binding sites. This two-chain model has been shown to be applicable to receptor systems for several other cytokines, such as granulocyte-macrophage colony-stimulating factor (GM-CSF), IL-3, IL-5 and nerve growth factor (NGF). The pleiotropy and redundancy of cytokines may be explained on the basis of this unique receptor system.
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Affiliation(s)
- T Kishimoto
- Department of Medicine III, Osaka University Medical School, Japan
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Hibi M, Sonoki T, Mori H. Functional coupling between vanillate-O-demethylase and formaldehyde detoxification pathway. FEMS Microbiol Lett 2005; 253:237-42. [PMID: 16242864 DOI: 10.1016/j.femsle.2005.09.036] [Citation(s) in RCA: 25] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2005] [Revised: 09/21/2005] [Accepted: 09/26/2005] [Indexed: 10/25/2022] Open
Abstract
Pseudomonas putida vanillate-O-demethylase consisting of VanA and VanB was expressed in Escherichia coli strain K-12. Recombinant E. coli strain K-12 cells expressing VanAB efficiently converted vanillate into protocatechuate with glucose consumption. Mutant lacking either pgi or zwf showed higher or lower converting activity than the parental strain, respectively. Formaldehyde, which is the by-product of the demethylation, was converted into formate in the cellular reaction. Formate accumulation was blocked by gene disruption of the E. coli frmA that coded glutathione-dependent formaldehyde dehydrogenase.
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Affiliation(s)
- Makoto Hibi
- Biofrontier Laboratories, Kyowa Hakko Kogyo Co. Ltd., 3-6-6 Asahimachi, Machidashi, Tokyo 194-8533, Japan
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Abstract
We report the case of a 2-year-old boy who presented with obstructive jaundice by pancreatic hemangioma. In this case, a minimal operation for obstructive jaundice without resection of the tumor was performed. Three years after the operation, the pancreatic hemangioma almost disappeared. We discuss treatment of the pancreatic hemangioma in children.
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Affiliation(s)
- M Hibi
- Department of Pediatric Surgery and Maizuru Medical Center, National Hospital Organization, Maizuru-city, Kyoto, Japan.
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Abstract
PURPOSE The treatment of rectal prolapse in children is controversial. We report the results of injection sclerotherapy in children using phenol in almond oil (PAO) and discuss the occurrence of complications after the injection of PAO. METHODS Nine children with rectal prolapse, aged from 2 years and 6 months to 14 years, were treated by PAO injection sclerotherapy between 1993 and 2000. The outcome of PAO injection sclerotherapy and the presence of complications were investigated from the point of anorectal function using anorectal manometry. RESULTS All of the nine patients were cured after one to three injections without any complications. The manometric study showed that normal anorectal reflex and other parameters of the anorectum were found after injection sclerotherapy. Two of the 4 who had complained of constipation no longer had constipation after the therapy. CONCLUSIONS PAO injection sclerotherapy is simple and should be recommended as a first method of treatment for rectal prolapse in children. PAO as a sclerosing agent did not cause any complications.
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Affiliation(s)
- Y Sasaki
- Division of Surgery, Children's Research Hospital, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, 602-8566 Kyoto, Japan
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Hibi M, Nagasaki A, Takahashi M, Yamagishi A, Uyeda TQP. Dictyostelium Discoideum Talin A is Crucial for Myosin II-Independent and Adhesion-Dependent Cytokinesis. J Muscle Res Cell Motil 2004; 25:127-40. [PMID: 15360128 DOI: 10.1023/b:jure.0000035842.71415.f3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Cytokinesis in myosin II-null (mhcA-) cells of Dictyostelium discoideum requires adhesion to a substratum. Moreover, such myosin II-independent, adhesion-dependent cytokinesis can be divided into two distinct classes: a cell cycle-coupled form (cytokinesis B) and a cell cycle-independent form (cytokinesis C). To better understand the mechanisms underlying cytokinesis B and C, we introduced mutations into mhcA- cells and isolated clones that consistently gave rise to large, multinucleated cells. One such clone was found to have a disrupted talA gene, which codes for one of two Dictyostelium homologues of talin. Time-lapse observation revealed that cytokinesis B is partially impaired in mhcA-/talA- cells and that cytokinesis C is completely blocked. MhcA-/talA- cells took significantly longer to complete cytokinesis B than mhcA- cells on regular polystyrene surfaces, but not on a more adhesive surface. During cytokinesis B in mhcA- cells, GFP-TalA localized in the cortex and in dot-like structures on the ventral surface. Like vertebrate talin, these TalA dots may be involved in substrate adhesion and provide the traction needed to efficiently carry out cytokinesis B. During cytokinesis C in mhcA- cells, GFP-TalA was localized in the cortex of future furrow regions, and was highly enriched in cytoplasmic bridges that formed as the furrowing proceeded. Analysis of furrows in which GFP-TalA concentrations were asymmetric suggested that cortical TalA prevents formation of leading edges in regions where its concentration is high and indirectly promotes formation of leading edges elsewhere, which causes passive furrowing of the TalA-rich regions.
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Affiliation(s)
- Makoto Hibi
- Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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Abstract
Recently a few articles have been published concerning the long-term follow-up of vaginoplasty of cloaca. However, no postoperative evaluation has been fully described and, in particular, the late complications are still unknown. We report a case of tuboovarian abscess after colonic vaginoplasty for high cloacal anomaly in a 13-year-old girl. She required a left salpingo-oophorectomy and postoperatively showed regular menstruation. Therefore we stress that tubo-ovarian abscess is one of the important late complications after colonic vaginoplasty for high cloacal anomaly.
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Affiliation(s)
- S Fumino
- Division of Surgery, Children's Research Hospital, Kyoto Prefectural University of Medicine, Kyoto, Japan.
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Yamada K, Nishida K, Hibi M, Hirano T, Matsuda Y. Comparative FISH mapping of Gab1 and Gab2 genes in human, mouse and rat. Cytogenet Cell Genet 2002; 94:39-42. [PMID: 11701952 DOI: 10.1159/000048780] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Gab1 and Gab2 are members of the Gab family which act as adapters for transmitting various signals in response to stimuli through cytokine and growth factor receptors, and T- and B-cell antigen receptors. We determined chromosome locations of the two genes in human, mouse and rat by fluorescence in situ hybridization. The Gab1 gene was localized to chromosome 4q31.1 in human, 8C3 in mouse and 19q11.1--> q11.2 in rat, and the Gab2 gene was located on chromosome 11q13.4-->q13.5 in human, 7E2 in mouse and 1q33.2-->q33.3 in rat. All human, mouse and rat Gab1 and Gab2 genes were localized to chromosome regions where conserved homology has been identified among the three species.
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Affiliation(s)
- K Yamada
- Laboratory of Cytogenetics, Division of Bioscience, Graduate School of Environmental Earth Science, Sapporo, Japan
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Nagasaki A, Hibi M, Asano Y, Uyeda TQ. Genetic approaches to dissect the mechanisms of two distinct pathways of cell cycle-coupled cytokinesis in Dictyostelium. Cell Struct Funct 2001; 26:585-91. [PMID: 11942613 DOI: 10.1247/csf.26.585] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Dictyostelium discoideum is a unique experimental organism which allows genetic analysis of the mechanism of cytokinesis of the animal type, and a number of mutations which affect cytokinesis in one way or other have been identified. Myosin II filaments accumulate in the equatorial region, and myosin II-null cells cannot divide in suspension, indicating that active, myosin II-dependent constriction of the cleavage furrow contributes to bisection of the cell. We refer to this method of cytokinesis as cytokinesis A. On substrates, however, myosin II-null cells divide efficiently in a cell cycle-coupled manner. This adhesion-dependent but myosin II-independent division method, which we termed cytokinesis B, is carried out by a pathway that is genetically distinct from that of cytokinesis A. Morphological analyses suggested that cytokinesis B is driven by radial traction forces generated along polar peripheries, which indirectly cause furrow ingression. Identification of two redundant pathways have allowed us to search genes involved in either pathway by mutagenizing cells which are already defective in one of the pathways. This approach enabled us to identify a number of novel cytokinesis-related genes, as well as to reclassify known genes as cytokinesis-related.
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Affiliation(s)
- A Nagasaki
- Gene Discovery Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba, Ibaraki, Japan
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Yamasaki S, Nishida K, Hibi M, Sakuma M, Shiina R, Takeuchi A, Ohnishi H, Hirano T, Saito T. Docking protein Gab2 is phosphorylated by ZAP-70 and negatively regulates T cell receptor signaling by recruitment of inhibitory molecules. J Biol Chem 2001; 276:45175-83. [PMID: 11572860 DOI: 10.1074/jbc.m105384200] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
To maintain various T cell responses and immune equilibrium, activation signals triggered by T cell antigen receptor (TCR) must be regulated by inhibitory signals. Gab2, an adaptor protein of the insulin receptor substrate-1 family, has been shown to be involved in the downstream signaling from cytokine receptors. We investigated the functional role of Gab2 in TCR-mediated signal transduction. Gab2 was phosphorylated by ZAP-70 and co-precipitated with phosphoproteins, such as ZAP-70, LAT, and CD3zeta, upon TCR stimulation. Overexpression of Gab2 in Jurkat cells or antigen-specific T cell hybridomas resulted in the inhibition of NF-AT activation, interleukin-2 production, and tyrosine phosphorylation. The structure-function relationship of Gab2 was analyzed by mutants of Gab2. The Gab2 mutants lacking SHP-2-binding sites mostly abrogated the inhibitory activity of Gab2, but its inhibitory function was restored by fusing to active SHP-2 as a chimeric protein. A mutant with defective phosphatidylinositol 3-kinase binding capacity also impaired the inhibitory activity, and the pleckstrin homology domain-deletion mutant revealed a crucial function of the pleckstrin homology domain for localization to the plasma membrane. These results suggest that Gab2 is a substrate of ZAP-70 and functions as a switch molecule toward inhibition of TCR signal transduction by mediating the recruitment of inhibitory molecules to the TCR signaling complex.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Animals
- Antigens, CD/biosynthesis
- Antigens, Differentiation, T-Lymphocyte/biosynthesis
- Binding Sites
- Blotting, Western
- CD3 Complex/metabolism
- Carrier Proteins/metabolism
- Cell Line
- Cytokines/metabolism
- DNA/metabolism
- Dose-Response Relationship, Drug
- Flow Cytometry
- Humans
- Hybridomas/metabolism
- Interleukin-2/biosynthesis
- Intracellular Signaling Peptides and Proteins
- Jurkat Cells
- Lectins, C-Type
- Luciferases/metabolism
- Lymphocyte Activation
- Membrane Proteins
- Mice
- Mutation
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphoproteins/metabolism
- Phosphorylation
- Precipitin Tests
- Protein Binding
- Protein Structure, Tertiary
- Protein Tyrosine Phosphatase, Non-Receptor Type 11
- Protein Tyrosine Phosphatase, Non-Receptor Type 6
- Protein Tyrosine Phosphatases/metabolism
- Protein-Tyrosine Kinases/metabolism
- Receptors, Antigen, T-Cell/metabolism
- SH2 Domain-Containing Protein Tyrosine Phosphatases
- Signal Transduction
- Structure-Activity Relationship
- Transfection
- Tyrosine/metabolism
- ZAP-70 Protein-Tyrosine Kinase
- src Homology Domains
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Affiliation(s)
- S Yamasaki
- Molecular Genetics, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
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46
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Narimatsu M, Maeda H, Itoh S, Atsumi T, Ohtani T, Nishida K, Itoh M, Kamimura D, Park SJ, Mizuno K, Miyazaki J, Hibi M, Ishihara K, Nakajima K, Hirano T. Tissue-specific autoregulation of the stat3 gene and its role in interleukin-6-induced survival signals in T cells. Mol Cell Biol 2001; 21:6615-25. [PMID: 11533249 PMCID: PMC99807 DOI: 10.1128/mcb.21.19.6615-6625.2001] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [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: 03/07/2001] [Accepted: 07/02/2001] [Indexed: 11/20/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) mediates signals of various growth factors and cytokines, including interleukin-6 (IL-6). In certain IL-6-responsive cell lines, the stat3 gene is autoregulated by STAT3 through a composite IL-6 response element in its promoter that contains a STAT3-binding element (SBE) and a cyclic AMP-responsive element. To reveal the nature and roles of the stat3 autoregulation in vivo, we generated mice that harbor a mutation in the SBE (stat3(mSBE)). The intact SBE was crucial for IL-6-induced stat3 gene activation in the spleen, especially in the red pulp region, the kidney, and both mature and immature T lymphocytes. The SBE was not required, however, for IL-6-induced stat3 gene activation in hepatocytes. T lymphocytes from the stat3(mSBE/mSBE) mice were more susceptible to apoptosis despite the presence of IL-6 than those from wild-type mice. Consistent with this, IL-6-dependent activation of the Pim-1 and junB genes, direct target genes for STAT3, was attenuated in T lymphocytes of the stat3(mSBE/mSBE) mice. Thus, the tissue-specific autoregulation of the stat3 gene operates in vivo and plays a role in IL-6-induced antiapoptotic signaling in T cells.
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Affiliation(s)
- M Narimatsu
- Department of Molecular Oncology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
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47
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Kojima H, Shinagawa A, Shimizu S, Kanada H, Hibi M, Hirano T, Nagasawa T. Role of phosphatidylinositol-3 kinase and its association with Gab1 in thrombopoietin-mediated up-regulation of platelet function. Exp Hematol 2001; 29:616-22. [PMID: 11376875 DOI: 10.1016/s0301-472x(01)00623-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Human blood platelets are easily available physiologic target cells for thrombopoietin (TPO). TPO up-regulates platelet aggregation and alpha-granule secretion induced by various agonists. We investigated the role of phosphatidylinositol 3-kinase (PI3K) and its association with Gab1 in TPO-mediated up-regulation of platelet function. MATERIALS AND METHODS PI3K inhibitors (wortmannin and LY294002) and a MAP/ERK-kinase (MEK) inhibitor (PD98059) were used to investigate the role of these kinases in TPO-mediated up-regulation of platelet function. To elucidate the molecules associated with PI3K, we performed immunoprecipitation and pull-down experiments followed by immunoblotting. In vitro kinase assay also was performed to detect extracellular signal-regulated kinase (ERK) kinase activity. RESULTS TPO up-regulated platelet alpha-granule secretion and aggregation induced by thrombin, which was dose-dependently inhibited by preincubation with wortmannin or LY294002. Immunoprecipitation and pull-down experiments revealed that regulatory subunit of PI3K, p85, was rapidly associated with tyrosine-phosphorylated Gab1 via its n- and c-terminal SH2 domains. Pretreatment of platelets with TPO dramatically augmented the thrombin-induced ERK activation, which was almost completely inhibited by LY294002. Furthermore, a MEK inhibitor, PD98059, not completely but significantly inhibited TPO-mediated up-regulation of thrombin-induced alpha-granule secretion. CONCLUSION TPO induces the association of tyrosine-phosphorylated Gab1 with p85-PI3K. In downstream signaling, ERK is PI3K-dependently activated, which plays a critical role for TPO-mediated up-regulation of platelet function.
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Affiliation(s)
- H Kojima
- Division of Hematology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
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48
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Abstract
The zebrafish homeobox gene dharma/bozozok (boz) is required for the formation and/or function of the Nieuwkoop center and the subsequent induction of the Spemann organizer. dharma is expressed soon after the midblastula transition in the dorsal blastomeres and the dorsal yolk syncytial layer (YSL). We found that the expression of dharma was upregulated or ectopically induced by misexpression of a Wnt protein and cytoplasmic components of the Wnt signaling pathway and downregulated by the expression of dominant-negative Tcf3. A 1.4-kbp fragment of the dharma promoter region contains consensus sequences for Tcf/Lef binding sites. This promoter region recapitulated the Wnt-dependent and dorsal dharma expression pattern when it was fused to luciferase or GFP. Deletion and point mutant analyses revealed that the Tcf/Lef binding sites were required to drive this expression pattern. These data established that dharma/boz functions between the dorsal determinants-mediated Wnt signals and the formation of the Nieuwkoop center.
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Affiliation(s)
- S L Ryu
- Division of Molecular Oncology, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
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49
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Abstract
The protooncogene Pim-1 encodes serine/threonine protein kinases that are involved in cytokine-mediated cell proliferation and in lymphoma- and leukemogenesis. It is largely unknown how Pim-1 executes its biological effects. Here we show that Pim-1 physically interacts with heat shock protein 90 alpha and beta (Hsp90alpha and beta). The Hsp90-specific inhibitor geldanamycin (GA) induced a rapid degradation of Pim-1 and reduced its kinase activity. The expression of Hsp90alpha was regulated by a signal from the cytokine receptor gp130, as is Pim-1's expression. These results indicate that Hsp90 is coordinately regulated with Pim-1 and is involved in the stabilization and function of Pim-1.
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Affiliation(s)
- K Mizuno
- Division of Molecular Oncology, Biomedical Research Center, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
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50
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Muraoka O, Ichikawa H, Shi H, Okumura S, Taira E, Higuchi H, Hirano T, Hibi M, Miki N. Kheper, a novel ZFH/deltaEF1 family member, regulates the development of the neuroectoderm of zebrafish (Danio rerio). Dev Biol 2000; 228:29-40. [PMID: 11087624 DOI: 10.1006/dbio.2000.9909] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Kheper is a novel member of the ZFH (zinc-finger and homeodomain protein)/deltaEF1 family in zebrafish. kheper transcripts are first detected in the epiblast of the dorsal blastoderm margin at the early gastrula stage and kheper is expressed in nearly all the neuroectoderm at later stages. kheper expression was expanded in noggin RNA-injected embryos and also in swirl mutant embryos and was reduced in bmp4 RNA-injected embryos and chordino mutant embryos, suggesting that kheper acts downstream of the neural inducers Noggin and Chordino. Overexpression of Kheper elicited ectopic expansion of the neuroectoderm-specific genes fkd3, hoxa-1, and eng3, and the ectopic expression of hoxa-1 was not inhibited by BMP4 overexpression. Kheper interacted with the transcriptional corepressors CtBP1 and CtBP2. Overexpression of a Kheper mutant lacking the homeodomain or of a VP16-Kheper fusion protein disturbed the development of the neuroectoderm and head structures. These data underscore the role of Kheper in the development of the neuroectoderm and indicate that Kheper acts as a transcriptional repressor.
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Affiliation(s)
- O Muraoka
- Department of Pharmacology, Division of Molecular Oncology, Department of Oncology, Biomedical Research Center, Osaka University Medical School, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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