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Site-directed mutagenesis of a possible type I copper ligand of bilirubin oxidase; a Met467Gln mutant shows stellacyanin-like properties
http://hdl.handle.net/2297/16744
http://hdl.handle.net/2297/1674430f40ed6-fb19-424c-93a5-e4ba2a1252ca
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SC-PR-SAKURAI-T-662.pdf (2.4 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | Site-directed mutagenesis of a possible type I copper ligand of bilirubin oxidase; a Met467Gln mutant shows stellacyanin-like properties | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Shimizu, Atsushi
× Shimizu, Atsushi× Sasaki, Takashi× Kwon, Jung Hee× Odaka, Akito× Satoh, Takanori× Sakurai, Nobuhiko× Sakurai, Takeshi× Yamaguchi, Shotaro× Samejima, Tatsuya |
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| 提供者所属 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 金沢大学理工研究域物質化学系 | |||||
| 書誌情報 |
Journal of Biochemistry 巻 125, 号 4, p. 662-668, 発行日 1999-01-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0021-924X | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00694073 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1093/oxfordjournals.jbchem.a022334 | |||||
| 出版者 | ||||||
| 出版者 | 日本生化学会 = Japanese Biochemical Society | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In our previous paper, we reported a mutant of recombinant Myrothecium verrucaria bilirubin oxidase, in which the Met467 residue was replaced by Gly. This mutant displayed a remarkable reduction in enzymatic activity and an evident decrease in the intensity of the absorption band around 600 nm (type 1 charge transfer transition). In this study, we report the preparation of three Met467 mutants (Met467Gln, Met467His, and Met467Arg) and characterize their enzymatic activities, midpoint potentials, and absorption and ESR spectra. Met467His and Met467Arg show no enzymatic activity and a great reduction in the intensity of the absorption band around 600 nm. Furthermore, their ESR spectra show no type 1 copper signal, but only a type 2 copper signal; however, oxidation by ferricyanide caused the type 1 copper signal to appear. On the other hand, Met467Gln as expressed shows both type 1 and type 2 copper signals in its ESR spectrum, the type 1 copper atom parameters being very different from usual blue copper proteins but very similar to those of stellacyanin. The enzymatic activity of the Met467Gln mutant for bilirubin is quite low (0.3%), but the activity for potassium ferrocyanide is similar (130%) to that of the wild type enzyme. These results indicate that Met467 is important for characterizing the features of the type 1 copper of bilirubin oxidase. | |||||
| 権利 | ||||||
| 権利情報 | © 1999 Japanese Biochemical Society | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 関連URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://jb.oxfordjournals.org/cgi/content/abstract/125/4/662 | |||||
