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鲨鱼肝刺激物质的分离纯化及其理化性质

郭昱, 孔毅, 李谦, 吴梧桐*   

  1. 中国药科大学生物制药学院, 南京 210009
  • 收稿日期:2000-11-14 修回日期:2001-01-16 出版日期:2001-06-15 发布日期:2001-06-15
  • 通讯作者: 吴梧桐*

Purification and Physicochemical Characteristics of Shark Hepatic Stimulator Substance

Guo Yu, Kong Yi, Li Qian, Wu Wutong*   

  1. School of Biopharmaceutics, China Pharmaceutical University, Nanjing 210009
  • Received:2000-11-14 Revised:2001-01-16 Online:2001-06-15 Published:2001-06-15
  • Contact: Wu Wutong*

摘要: 从鲨鱼肝中分离纯化了鲨鱼肝刺激物质(sHSS),并对其理化性质进行了研究。纯化过程包括匀浆、离心、超滤、DEAE-sephadex A25 层析、FPLC mono Q 层析。经此过程, sHSS 活性可提高到9000 IU/mg,纯化倍数可达750倍。经SDS聚丙烯酰胺凝胶电泳和高效凝胶过滤检测分别只出现一条带和一个洗脱峰。用质谱法测其分子量为16973 Da。用PE-ABD491A蛋白质N-末端测序仪测定其N-末端氨基酸排列顺序是N-Met-Arg-Thr-Gln-Glu-His-Thr- Lys-Ser-ValsHSS具有热稳定性和耐酸碱性。

关键词: 肝刺激物质HSS, 鲨鱼, 纯化, 质谱

Abstract: A hepatic stimulator substance from Shark liver (sHSS) was purified and characterized. The purification procedure included homogenization, centrifugation, ultrafiltration, DEAE-sephadex A25 chromatography and FPLC mono Q chromatography. By the procedure, the stimulatory specific activity of sHSS could be increased to 9000 IU/mg, and was 750 times more than the crude extract. The purity of the final purified fraction F70 which retained the maximal activity of sHSS was checked by polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate (SDS-PAGE) and High Performance Gel Filtration respectively, and showed only one band or one peak. Its molecular weight was measured to be 16973 Da by mass spectrometry. Its N-terminal sequence was determined to be N-Met-Arg-Thr-Gln-Glu-His-Thr-Lys- Ser-Val by PE-ABD 491A Protein N-Terminal Sequencing Meter. It was stable over a wide range of pH and temperature.

Key words: Hepatic stimulator substance, HSS, Shark, Purification, Mass spectrometry

Supporting: *This research was subsidized by Jiangsu natural science fund (BK97081)
Corresponding authors (WUWTONG@mailbox. cpu.edu.cn).