| 研究生: |
李宜芳 Li, I-Fang |
|---|---|
| 論文名稱: |
修飾冠狀醚之金奈米粒子對胰蛋白酶活性的影響 The Activity of Trypsin upon Complexation with Thiolalkylated Crown Ether Modified Gold Nanoparticles |
| 指導教授: |
葉晨聖
Yeh, Chen-Sheng |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2004 |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 85 |
| 中文關鍵詞: | 金奈米粒子 、胰蛋白脢 、冠狀醚 |
| 外文關鍵詞: | Trypsin, Gold nanoparticles, crown ether |
| 相關次數: | 點閱:138 下載:1 |
| 分享至: |
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將衍生硫醇基的有機環分子修飾於金奈米粒子上,其有機環分子為兩種冠狀醚,分別為2-(10-硫醇基葵烷氧基)甲基-12-冠狀醚-4和2-(10-硫醇基葵烷氧基)甲基-18-冠狀醚-6,利用電子穿透式顯微鏡(TEM)觀察其修飾冠狀醚的金奈米粒子的互相作用關係。我們發現修飾不同孔洞的冠狀醚於金奈米粒子上,加入磷酸鹽類緩衝液中,其聚集的方式會有所不同,修飾18-冠狀醚-6的金,以最密推積的方式聚集形成二維六角形,而修飾12-冠狀醚-4的金,則是比較偏向三維的雜亂排列。接著,測試金奈米粒子 / 冠狀醚對蛋白脢的影響,固定的酵素濃度均為10μM,分別混合10nM、5nM、1nM等不同濃度的金奈米粒子 / 冠狀醚濃度,並與純胰蛋白酶的酵素活性比較。我們發現在加入濃度為1nM的金奈米粒子 / 冠狀醚的酵素催化之初始速率降低了40%,而當加大金奈米粒子 / 冠狀醚的濃度為10 nM時,初始速率卻與純的胰蛋白酶幾乎相同。
Two crown ether, 2-[(10-Mercaptodecyl)oxy]methyl-18-crown-6 (18-Crown-6) and 2-[(10-Mercaptodecyl)oxy]methyl-12-crown-4 (12-Crown-4), functionalized gold nanoparticles have been characterized both in its TEM micrograph and its effect on trypsin trytic activity. In TEM micrographic studies, Au/18-crown-6 conjugates organized into a uniform 2D monolayer with close hexagonal packing, while Au/12-crown-4 exhibited both 2D and 3D assembles, in the potassium phosphate buffer (10 mM, pH 8). The trypsin tryptic activity was studied as a function of Au/Crown concentrations (1 nM, 5 nM, 10 nM). It was found that the initial rate in the 1 nM of Au/Crown showed about 40% decrease compared with pure enzyme; however, with the increase of Au/Crown concentration, the activity increased.
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