Some Properties of a Macromolecular Conjugate of Lysozyme Prepared by Modification with a Monomethoxypolyethylene Glycol Derivative.
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- NODAKE Yuichi
- Laboratory of Biochemistry, Division of Bioresource and Bioenvironmental Sciences, Graduate School of Kyushu University
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- YAMASAKI Nobuyuki
- Laboratory of Biochemistry, Division of Bioresource and Bioenvironmental Sciences, Graduate School of Kyushu University
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Hen egg-white lysozyme was modified with a succinyl ester derivative of monomethoxypolyethylene glycol (mPEG-COONSu), and some properties of the resulting conjugate (mPEG-lysozyme) were studied. The conjugate was prepared by modification of lysozyme with mPEG-COONSu and purified with use of columns of CM-Toyopearl 650M and Sephadex G-75. Analytical data indicated that in the conjugate, 1.05 moles of mPEG with an average molecular weight of 5,000 were covalently attached to the lysozyme molecule. Tryptic peptide analysis of the conjugate showed that Lys 33 in lysozyme is the residue mainly modified with mPEG-COONSu. Covalent attachment of the mPEG-derivative to amino groups greatly increased the thermostability of lysozyme without any conformational change of the protein molecule. mPEG-lysozyme retained full enzyme activity for glycol chitin, but lytic activity for Micrococcus luteus cells in neutral media was 75% of that of native lysozyme and its optimal pH was at pH 5.0. It was also found that the reactivity of lysozyme with anti-lysozyme antibody from BALB/c mice or human lymphocytes was decreased by modification with mPEG-COONSu. From these findings, it was suggested that mPEG-COONSu can be advantageously used for protein tailoring of lysozyme.<br>
収録刊行物
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 64 (4), 767-774, 2000
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
- 1390001206473708928
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- NII論文ID
- 110002679990
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- NII書誌ID
- AA10824164
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- COI
- 1:CAS:528:DC%2BD3cXjtVeltr4%3D
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- ISSN
- 13476947
- 09168451
- http://id.crossref.org/issn/09168451
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- NDL書誌ID
- 5379959
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- PubMed
- 10830491
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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
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- 抄録ライセンスフラグ
- 使用不可