Purification and characterization of glutamic acid decarboxylase from Grifola frondosa
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- IWAMOTO Kazuko
- Laboratory of Food Microbiological Science and Biotechnology, Division of Applied Biological Chemistry, Graduate School of Agriculture, Kin-ki University
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- YOSHIDA Takahiro
- Laboratory of Food Microbiological Science and Biotechnology, Division of Applied Biological Chemistry, Graduate School of Agriculture, Kin-ki University
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- KUSUDA Mizuho
- Laboratory of Biocycle Engineering, Graduate School of Life and Environmental Science, Osaka Prefecture University
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- FUKUTA Yasuhisa
- Laboratory of Food Microbiological Science and Biotechnology, Division of Applied Biological Chemistry, Graduate School of Agriculture, Kin-ki University
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- TERASHITA Takao
- Laboratory of Food Microbiological Science and Biotechnology, Division of Applied Biological Chemistry, Graduate School of Agriculture, Kin-ki University
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- SHIRASAKA Norifumi
- Laboratory of Food Microbiological Science and Biotechnology, Division of Applied Biological Chemistry, Graduate School of Agriculture, Kin-ki University
Bibliographic Information
- Other Title
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- マイタケ由来グルタミン酸デカルボキシラーゼの精製と特性
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Abstract
Glutamic acid decarboxylase (GAD) [EC 4.1.1.15], an enzyme involved in accumulation of GABA by edible mushrooms, was purified from fruiting bodies of Grifola frondosa, and its properties were characterized. The GAD enzyme was purified 11.9-fold, with a yield of 1.24%, and showed a single band on SDS-PAGE. The molecular mass of purified GAD was 42 kDa based on SDS-PAGE and 97 kDa based on HPLC-GPC. These results indicate that the enzyme consists of 2 identical subunits. Maximum activity was observed at 37℃ at a pH value of 3.5. The enzyme was stable at 37℃ for 30 min and in the pH range 2.5-5.5. GAD isolated from G. frondosa was specific for _L-glutamate. The K_m and V_<max> of the enzyme were calculated to be 7.5 mM and 450 μmol min^<-1>, respectively. The enzyme activity was strongly inhibited by HgCl_2 and AgNO_3 (0% and 32% of activity in the absence of inhibitors, respectively).
Journal
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- Mushroom Science and Biotechnology
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Mushroom Science and Biotechnology 21 (1), 16-22, 2013
Japanese Society of Mushroom Science and Biotechnology
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Details 詳細情報について
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- CRID
- 1390282680264922112
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- NII Article ID
- 110009604523
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- NII Book ID
- AA12415767
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- ISSN
- 24327069
- 13487388
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- NDL BIB ID
- 024749564
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed