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http://ir.cmu.edu.tw/ir/handle/310903500/29602
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| 題名: | Structure of a major glycolipid from Thermus oshimai NTU-063 |
| 作者: | Lu, TL;Chen, CS;Yang, FL;Fung, JM;Chen, MY;Tsay, SS;Li, JJ;Zou, W;Wu, SH |
| 貢獻者: | 健康照護學院醫技系;Acad Sinica, Inst Biol Chem, Taipei 115, Taiwan;Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan;Natl Taiwan Univ, Inst Biochem Sci, Taipei 106, Taiwan;Natl Taiwan Univ, Inst Plant Biol, Taipei 106, Taiwan;Natl Taiwan Univ, Dept Life Sci, Taipei 106, Taiwan;Natl Res Council Canada, Inst Biol Sci, Ottawa, ON K1A 0R6, Canada;China Med Univ, Sch Med Lab Sci & Biotechnol, Taichung, Taiwan |
| 日期: | 2004 |
| 上傳時間: | 2010-09-24 14:38:39 (UTC+8) |
| 出版者: | ELSEVIER SCI LTD |
| 摘要: | Lactoferrin is a metal-binding glycoprotein exhibiting multifunctional immunoregulation of antibacterial, antioxidant, anti-endotoxin and antiviral activities. Uptake of porcine lactoferrin (PLF) has been shown to enhance resistance to diarrhea and anemia in neonatal piglets. In this study, the methylotrophic yeast, Pichia pastoris, was used to express a recombinant PLF (rPLF) gene from swine mammary gland. A synthetic secretion cassette was constructed using the inducible promoter of the alcohol oxidase-1 gene (AOX1) and the yeast a-mating factor signal peptide. After electroporation and Zeocin selection, several clones expressed high levels of rPLF protein which constitutes more than 30% of the total protein. A time-course study showed that rPLF mRNA transcripts are stably expressed during 120 h of culture induction. rPLF was exported into the culture supernatant at approximately 87 mg/l and a large portion of rPLF was accumulated in the cell cytoplasm at approximately 760 mg/l after 72 h of methanol induction. Recombinant PLF protein was purified via a heparin column using a fast protein liquid chromatography system. The glycosylation of P. pastoris-derived rPLF was analyzed and similar patterns to milk PLF were observed. Pepsin hydrolysate of rPLF displayed high bactericidal activity against Escherichia coli ATCC 25922 under scanning electron microscopy observation and minimal inhibitory concentration and minimal bactericidal concentration tests. Our results suggested that the methylotrophic yeast-inducible system is suitable for large-scale production of active antibacterial rPLF glycoprotein. Copyright (C) 2004 S. Karger AG, Basel. |
| 關聯: | CARBOHYDRATE RESEARCH 339(15):2593-2598 |
| 顯示於類別: | [醫學檢驗生物技術學系暨碩士班 ] 期刊論文
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