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Equilibrium and kinetics of the folding and unfolding of canine milk lysozyme.
https://ir.soken.ac.jp/records/4330
https://ir.soken.ac.jp/records/433081d43cfd-946f-4a20-8454-6132aa0e8abc
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2014-03-25 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Equilibrium and kinetics of the folding and unfolding of canine milk lysozyme. | |||||||||||
| タイトル | ||||||||||||
| タイトル | Equilibrium and kinetics of the folding and unfolding of canine milk lysozyme. | |||||||||||
| 言語 | en | |||||||||||
| 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 | |||||||||||
| アクセス権 | ||||||||||||
| アクセス権 | metadata only access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||
| 著者 |
NAKATANI, Hiroyasu
× NAKATANI, Hiroyasu
× KUWAJIMA, Kunihiro
× et, al.
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| 著者別名 |
桑島, 邦博
× 桑島, 邦博
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | The equilibrium and kinetics of canine milk lysozyme folding/unfolding were studied by peptide and aromatic circular dichroism and tryptophan fluorescence spectroscopy. The Ca2+-free apo form of the protein exhibited a three-state equilibrium unfolding, in which the molten globule state is well populated as an unfolding intermediate. A rigorous analysis of holo protein unfolding, including the data from the kinetic refolding experiments, revealed that the holo protein also underwent three-state unfolding with the same molten globule intermediate. Although the observed kinetic refolding curves of both forms were single-exponential, a burst-phase change in the peptide ellipticity was observed in both forms, and the burst-phase intermediates of both forms were identical to each other with respect to their stability, indicating that the intermediate does not bind Ca2+. This intermediate was also shown to be identical to the molten globule state observed at equilibrium. The Φ-value analysis, based on the effect of Ca2+ on the folding and unfolding rate constants, showed that the Ca2+-binding site was not yet organized in the transition state of folding. A comparison of the result with that previously reported for α-lactalbumin indicated that the folding initiation site is different between canine milk lysozyme and α-lactalbumin, and hence, the folding pathways must be different between the two proteins. These results thus provide an example of the phenomenon wherein proteins that are very homologous to each other take different folding pathways. It is also shown that the native state of the apo form is composed of at least two species that interconvert. | |||||||||||
| 書誌情報 |
Biochemistry en : Biochemistry 巻 46, 号 17, p. 5238-5251, 発行日 2007-04-04 |
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| 出版者 | ||||||||||||
| 出版者 | American Chemical Society | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||
| 収録物識別子 | 0006-2960 | |||||||||||
| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | http://doi.org/10.1021/bi602464v | |||||||||||
| 関連名称 | 10.1021/bi602464v | |||||||||||
| 権利 | ||||||||||||
| 権利情報 | © 2007 American Chemical Society | |||||||||||
