Enzymatic Characterization of 5-Methylthioribose 1-Phosphate Isomerase from<i>Bacillus subtilis</i>
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- SAITO Yohtaro
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)
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- ASHIDA Hiroki
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)
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- KOJIMA Chojiro
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)
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- TAMURA Haruka
- Department of Materials Chemistry, Graduate School of Engineering, Osaka University
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- MATSUMURA Hiroyoshi
- Department of Materials Chemistry, Graduate School of Engineering, Osaka University
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- KAI Yasushi
- Department of Materials Chemistry, Graduate School of Engineering, Osaka University
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- YOKOTA Akiho
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)
書誌事項
- タイトル別名
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- Enzymatic Characterization of 5-Methylthioribose 1-Phosphate Isomerase from Bacillus subtilis
- Enzymatic characterization of 5-methylthioribose 1-phosphate isomerase from <italic>Bacillus subtilis</italic>
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The product of the mtnA gene of Bacillus subtilis catalyzes the isomerization of 5-methylthioribose 1-phosphate (MTR-1-P) to 5-methylthioribulose 1-phosphate (MTRu-1-P). The catalysis of MtnA is a novel isomerization of an aldose phosphate harboring a phosphate group on the hemiacetal group. This enzyme is distributed widely among bacteria through higher eukaryotes. The isomerase reaction analyzed using the recombinant B. subtilis enzyme showed a Michaelis constant for MTR-1-P of 138 μM, and showed that the maximum velocity of the reaction was 20.4 μmol min−1 (mg protein)−1. The optimum reaction temperature and reaction pH were 35 °C and 8.1. The activation energy of the reaction was calculated to be 68.7 kJ mol−1. The enzyme, with a molecular mass of 76 kDa, was composed of two subunits. The equilibrium constant in the reversible isomerase reaction [MTRu-1-P]/[MTR-1-P] was 6. We discuss the possible reaction mechanism.
収録刊行物
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 71 (8), 2021-2028, 2007
公益社団法人 日本農芸化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206479022720
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- NII論文ID
- 10027517927
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- NII書誌ID
- AA10824164
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- COI
- 1:CAS:528:DC%2BD2sXhtVaju7bK
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- ISSN
- 13476947
- 09168451
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- NDL書誌ID
- 8887959
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- PubMed
- 17690466
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可