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C-terminal residues of ferredoxin-NAD(P)+ reductase from Chlorobaculum tepidum are responsible for reaction dynamics in the hydride transfer and redox equilibria with NADP+/NADPH
https://doi.org/10.24517/00049539
https://doi.org/10.24517/0004953962486013-7bfb-4df9-8f77-016569782c75
名前 / ファイル | ライセンス | アクション |
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SC-PR-SEO-D-275.pdf (1.8 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-06-08 | |||||
タイトル | ||||||
タイトル | C-terminal residues of ferredoxin-NAD(P)+ reductase from Chlorobaculum tepidum are responsible for reaction dynamics in the hydride transfer and redox equilibria with NADP+/NADPH | |||||
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 | |||||
ID登録 | ||||||
ID登録 | 10.24517/00049539 | |||||
ID登録タイプ | JaLC | |||||
著者 |
Seo, Daisuke
× Seo, Daisuke× Asano, Tomoya |
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著者別表示 |
瀨尾, 悌介
× 瀨尾, 悌介× 浅野, 智哉 |
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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 |
Photosynthesis Research 巻 136, 号 3, p. 275-290, 発行日 2018-06-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0166-8595 | |||||
NCID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00362200 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s11120-017-0462-z | |||||
出版者 | ||||||
出版者 | Springer Netherlands | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Ferredoxin-NAD(P)+ reductase ([EC 1.18.1.2], [EC 1.18.1.3]) from Chlorobaculum tepidum (CtFNR) is structurally homologous to the bacterial NADPH-thioredoxin reductase (TrxR), but possesses a unique C-terminal extension relative to TrxR that interacts with the isoalloxazine ring moiety of the flavin adenine dinucleotide prosthetic group. In this study, we introduce truncations to the C-terminal residues to examine their role in the reactions of CtFNR with NADP+ and NADPH by spectroscopic and kinetic analyses. The truncation of the residues from Tyr326 to Glu360 (the whole C-terminal extension region), from Phe337 to Glu360 (omitting Phe337 on the re-face of the isoalloxazine ring) and from Ser338 to Glu360 (leaving Phe337 intact) resulted in a blue-shift of the flavin absorption bands. The truncations caused a slight increase in the dissociation constant toward NADP+ and a slight decrease in the Michaelis constant toward NADPH in steady-state assays. Pre-steady-state studies of the redox reaction with NADPH demonstrated that deletions of Tyr326–Glu360 decreased the hydride transfer rate, and the amount of reduced enzyme increased at equilibrium relative to wild-type CtFNR. In contrast, the deletions of Phe337–Glu360 and Ser338–Glu360 resulted in only slight changes in the reaction kinetics and redox equilibrium. These results suggest that the C-terminal region of CtFNR is responsible for the formation and stability of charge-transfer complexes, leading to changes in redox properties and reactivity toward NADP+/NADPH. © 2017 Springer Science+Business Media B.V., part of Springer Nature | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Embargo Period 12 months | |||||
権利 | ||||||
権利情報 | Copyright © 2017 Springer Science+Business Media B.V., part of Springer Nature | |||||
権利 | ||||||
権利情報 | The final publication is available at www.springerlink.com/article/10.1007/s11120-017-0462-z | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa |