期刊論文
| 學年 | 95 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2006-08-01 |
| 作品名稱 | A solvent stable metalloprotease produced by Bacillus sp. TKU004 and its application in the deproteinization of squid pen for β-chitin preparation |
| 作品名稱（其他語言） | |
| 著者 | Wang, San-lang; Kao, Te-yi; Wang, Chuan-lu; Yen, Yue-horng; Chern, Ming-kai; Chen, Yau-hung |
| 單位 | 淡江大學生命科學研究所 |
| 出版者 | Philadelphia: Elsevier Inc. |
| 著錄名稱、卷期、頁數 | Enzyme and Microbial Technology 39(4), pp.724-731 |
| 摘要 | A protease-producing bacterium was isolated and identified as Bacillus sp. TKU004. It thus can be used for deproteinization of squid pen in the preparation of β-chitin. The optimized condition for protease production was found when the culture was shaken at 30 °C for 4 days in 100 mL of medium containing 2% squid pen powder (SPP) (w/v), 0.1% K2HPO4, and 0.05% MgSO4. Under such condition, both the production of protease by Bacillus sp. TKU004 and the resulted protein removal of squid pen attained the optimum. They were 0.065 U/mL and 73%, respectively. An extracellular protease was purified from the culture supernatant of Bacillus sp. TKU004. The molecular weight of TKU004 protease was 27 and 57 kDa assayed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and gel filtration, respectively. The optimum pH, optimum temperature, pH stability, thermal stability, Km, Vmax, and activation energy of TKU004 protease were 6–8, 60 °C, pH 5–8, 50 °C, 2.98 mg/mL, 0.14 U/mL, 8.31 J/(mol K), respectively. It was concluded that TKU004 protease is a Zn-containing metalloenzyme, and its dimeric structure contains at least one disulfide bond. The unique characteristic of TKU004 protease is that it retained more than 60% of its original activity after preincubation for 10 days at 25 °C in the presence of tested organic solvents (25%, v/v). This is also the first report of a strain being able to use squid pen as the sole carbon/nitrogen source for proteases production and being used for the reclamation of β-chitin from squid pen. |
| 關鍵字 | Bacillus; Protease; Squid pen; Chitin; Deproteinization |
| 語言 | en |
| ISSN | 0141-0229 |
| 期刊性質 | 國外 |
| 收錄於 | SCI EI |
| 產學合作 | |
| 通訊作者 | Wang, San-lang |
| 審稿制度 | |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/18862 ) |