Packing Density of Glycolipid Biosurfactant Monolayers Give a Significant Effect on Their Binding Affinity Toward Immunoglobulin G
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- Imura Tomohiro
- Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST)
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- Masuda Yuma
- Faculty of Science and Technology, Tokyo University of Science
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- Ito Seya
- Faculty of Science and Technology, Tokyo University of Science
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- Worakitkanchanakul Wannasiri
- Faculty of Science and Technology, Tokyo University of Science
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- Morita Tomotake
- Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST)
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- Fukuoka Tokuma
- Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST)
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- Sakai Hideki
- Faculty of Science and Technology, Tokyo University of Science Institute of Colloid and Interfacial Science, Tokyo University of Science
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- Abe Masahiko
- Faculty of Science and Technology, Tokyo University of Science Institute of Colloid and Interfacial Science, Tokyo University of Science
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- Kitamoto Dai
- Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST)
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抄録
Mannosylerythritol lipid-A (MEL-A) is one of the most promising glycolipid biosurfactants, and abundantly produced by Pseudozyma yeasts. MEL-A gives not only excellent self-assembling properties but also a high binding affinity toward human immunoglobulin G (HIgG). In this study, three kinds of MEL-A were prepared from methyl myristate [MEL-A (m)], olive oil [MEL-A (o)], and soybean oil [MEL-A (s)], and the effect of interfacial properties of each MEL-A monolayer on the binding affinity toward HIgG was investigated using surface plasmon resonance (SPR) and the measurement of surface pressure (π)-area (A) isotherms. Based on GC-MS analysis, the main fatty acids were C8 and C10 acids in all MEL-A, and the content of unsaturated fatty acids was 0% for MEL-A (m), 9.1% for MEL-A (o), 46.3% for MEL-A (s), respectively. Interestingly, the acid content significantly influenced on their binding affinity, and the monolayer of MEL-A (o) gave a higher binding affinity than that of MEL-A (m) and MEL-A (s). Moreover, the mixed MEL-A (o)/ MEL-A (s) monolayer prepared from 1/1 molar ratio, which comprised of 27.8% of unsaturated fatty acids, indicated the highest binding affinity. At the air/water interface, MEL-A (o) monolayer exhibited a phase transition at 13°C from a liquid condensed monolayer to a liquid expanded monolayer, and the area per molecule significantly expanded above 13°C, while the amount of HIgG bound to the liquid expanded monolayer was much higher than that bound to liquid condensed monolayer. The binding affinity of MEL-A toward HIgG is thus likely to closely relate to the monolayer packing density, and may be partly controlled by temperature.<br>
収録刊行物
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- Journal of Oleo Science
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Journal of Oleo Science 57 (8), 415-422, 2008
公益社団法人 日本油化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679068769536
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- NII論文ID
- 130000055377
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- NII書誌ID
- AA11503337
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- ISSN
- 13473352
- 13458957
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- NDL書誌ID
- 9579264
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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
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- 抄録ライセンスフラグ
- 使用不可