首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (6): 798-801.doi: 10.3969/j.issn.1006-7795.2011.06.018

• 帕金森病的发病机制研究 • 上一篇    下一篇

基因重组型人SORL1蛋白质片段的原核表达和纯化

李爽1, 李尧华1, 叶懿文1, 李昕1, 于顺1, 杨慧2, 陈彪1   

  1. 1. 首都医科大学宣武医院老年病研究所神经生物学研究室,教育部神经变性病重点实验室,北京100053;2. 首都医科大学北京神经科学研究所,北京市神经再生修复研究重点实验室, 教育部神经变性病重点实验室,北京 100069
  • 收稿日期:2011-10-16 修回日期:1900-01-01 出版日期:2011-12-21 发布日期:2011-12-21
  • 通讯作者: 李尧华

Prokaryotic expression and purification of recombinant human SORL1 protein

LI Shuang1, LI Yao-hua1, YE Yi-wen1, LI Xin1, YU Shun1, YANG Hui2, CHEN Biao1   

  1. 1. Department of Neurobiology, Beijing Institute of Geriatrics, Key Laboratory for Neurodegenerative Diseases, Ministry of Education;Xuanwu Hospital, Capital Medical University, Beijing 100053, China;2. Beijing institute for Neuroscience, Capital Medical University, Beijing center for Neural Regeneration & Repair;Key Laboratory for Neurodegenerative Disease, Ministry of Education, Beijing 100069, China
  • Received:2011-10-16 Revised:1900-01-01 Online:2011-12-21 Published:2011-12-21

摘要: 目的 制备基因重组型人SORL1蛋白质片段,为探讨阿尔茨海默病的发病机制提供实验基础。方法 采用PCR方法扩增人sorl1 cDNA 编码区5 923~6 260 bp片段,克隆入原核表达载体pET-28a(+)中。用大肠杆菌BL21(DE3)plysS表达重组质粒,用液相色谱法纯化基因重组蛋白。结果 PCR扩增产物为358 bp,其ATG和TGA之间的结构与人sorl1 cDNA的5 923~6 260 bp区完全一致。基因重组质粒在大肠杆菌BL21(DE3)plysS中高效表达,其表达产物存在于包涵体组分中。纯化的基因重组蛋白在SDS-PAGE中表现为单一条带,表观分子量约为13 000。结论 sorl1 cDNA 的5 923~6 260 bp片段在原核细胞中大量表达,纯化后的基因重组蛋白可尝试用于抗体的制备。

关键词: 含L(DLR类)A重复分拣蛋白相关受体, 基因重组蛋白, 阿尔茨海默病

Abstract: Objective To prepare the recombinant human SORL1 protein, and provide the experimental foundation for study about the pathogenesis of Alzheimer's disease. Methods A human sorl1 cDNA fragment(5 923~6 260 bp) was amplified by PCR, and subucloned into pET-28a(+) vector. Recombinant plasmid was expressed by E.coli BL21(DE3), and the recombinant protein was purified by liquid chromatography. Results A 358 bp cDNA fragment was amplified by PCR method. Its structure between the ATG and TGA was completely consistent with the human sorl1 cDNA fragment(5 923~6 260 bp). The recombinant plasmid in E.coli BL21(DE3) was highly expressed and its expression product was mainly in the inclusion body. The purified protein on SDS-PAGE demonstrated a single band, which appeared to have a molecular weight of about 13 000. Conclusion Human sorl1 cDNA fragment was highly expressed in prokaryotic cells. The purified recombinant protein can be used to prepare antibodies.

Key words: sortilin-related receptor, L(DLR class) A repeats-containing, recombinant protein, Alzheimer's disease

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