ASIA unversity:Item 310904400/1950
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    Title: 水稻台農67號及其香米突變體SA0420香味相關基因之探討
    Study on aroma related genes in rice(Oryza sativa L.)Tainung 67 and its aromatic mutant SA0420.
    Authors: 郭淑明
    Contributors: 生物科技學系碩士班
    Date: 2005
    Issue Date: 2009-10-13 06:35:10 (UTC+0)
    Publisher: 亞洲大學
    Abstract: 本研究利用光桿菌菌株對脫脂奶與明膠平板之蛋白質水解能力,自13 株供試之本土菌株中,篩選4 株活性較佳之菌株,在進一步培養於NB、LB 和PP3T 等不同的液態培養基,觀察蛋白質分解酵素之活性。初步實驗結果顯示,光桿菌菌株0805-P5G 的蛋白質分解酵素於NB 液態培養液,在培養八天後其活性較佳。光桿菌的蛋白質分解酵素經由FPLC 與High Trap DEAE sepharose FF column 及HighTrap Q sepharose XL column 等連續步驟純化,可使蛋白質分解酵素純度提高。接著利用膠體酵素活性電泳分析(zymogram)得到0805-P5G菌株的蛋白質分解酵素,其蛋白質活性位置大約為50 kDa,以聚丙烯醯胺凝膠電泳(SDS-PAGE)確認其分子量,並進行N 端與LC MS/MS定序確認其為光桿菌蛋白質分解酵素。利用FPLC 進行蛋白質純化後測得蛋白質分解酵素最適溫度為60℃、最適酸鹼值為pH 8。此蛋白質分解酵素會受金屬螯合劑EDTA 及1, 10-phenanthtoline 之抑制,證實其為金屬蛋白質分解酵素。光桿菌蛋白質分解酵素經注射大蠟蛾處理後,發現具有殺蟲效果;光桿菌蛋白質分解酵素經餵食處理後,其對本土小菜蛾有口服殺蟲效果,但對美國品系的小菜蛾口服殺蟲效果較差。
    Appears in Collections:[Department of Biotechnology] Theses & dissertations

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