弓形虫MIC1蛋白在杆状病毒系统中的表达及活性分析
CSTR:
作者:
作者单位:

1.沈阳农业大学动物科学与医学学院/重要家畜疫病研究教育部重点实验室,沈阳 110866;2.辽宁成大生物股份有限公司,沈阳 110179

作者简介:

李响,E-mail:2020240596@stu.syau.edu.cn

通讯作者:

桑晓宇,E-mail:xysang2016@syau.edu.cn

中图分类号:

S852.7

基金项目:

国家自然科学基金项目(31902297;31672546;32072891);辽宁省教育厅项目(LJKZ0673;LSNQN202003);沈阳市中青年科技创新人才支持计划项目(RC 210291)


Purification and activity analysis of Toxoplasma gondii MIC1 protein expressed in baculovirus system
Author:
Affiliation:

1.College of Animal Science and Veterinary Medicine, Shenyang Agricultural University/ Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Shenyang 110866, China;2.Liaoning Chengda Biotechnology Co., Ltd., Shenyang 110179, China

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    为构建可溶性表达弓形虫MIC1蛋白质的重组杆状病毒株并分析重组蛋白质的活性,通过PCR扩增弓形虫mic1基因的编码序列并连接到pFastBac 1质粒中,将重组的转移质粒转化DH10Bac感受态细胞,通过蓝白斑筛选获得重组杆粒,转染Sf9细胞后连续培养3代获得重组杆状病毒株。结果显示,Sf9细胞在感染后的第3天出现典型的细胞病变;间接免疫荧光和Western blot试验结果表明MIC1重组蛋白质在感染的Sf9细胞中成功可溶性表达;纯化的MIC1重组蛋白质不仅具有结合唾液酸乳糖的能力,同时能够刺激Balb/c小鼠产生较高水平的特异性抗体(>1∶25 600)。以上结果表明,通过杆状病毒表达系统可获得具有生物学活性的弓形虫MIC1重组蛋白质。

    Abstract:

    The purpose of this study was to construct a recombinant baculovirus strain expressing soluble Toxoplasma gondii MIC1 protein and identify the biological activity of the recombinant protein. The CDS sequence of mic1 gene was amplified by PCR, ligated into the pFastBac 1 vector, and then transformed into DH10Bac cell. To obtain recombinant baculovirus, recombinant Bacmid was extracted and transfected into Sf9 cells. The transfected Sf9 cells exhibited typical lesion on the 3rd day after transfection. The results of indirect immunofluorescence assay and Western blot showed that the MIC1 recombinant protein was successfully expressed in transfected Sf9 cells. The purified MIC1 recombinant protein not only possessed the ability to bind to sialyllactose, but also could stimulate Balb/c mice to produce a high level of specific antibodies (>1∶25 600). These results showed that the biologically active MIC1 recombinant protein was successfully obtained through the baculovirus expression system.

    表 1 引物设计Table 1 Primer design
    图2 重组转移质粒的构建Fig.2 Construction of recombinant transfer plasmid
    图3 重组杆粒的选择与鉴定Fig.3 Selection and identification of recombinant Bacmid
    图4 重组杆状病毒rBV-MIC1的鉴定Fig.4 Identification of recombinant baculovirus rBV-MIC1
    图5 IFA检测MIC1重组蛋白质在感染的Sf9细胞中的表达(200×)Fig.5 Expression of MIC1 recombinant protein in infected Sf9 cells identified by IFA (200×)
    图6 MIC1重组蛋白质的表达与纯化Fig.6 Expression and purification of MIC1 recombinant protein
    图7 BLI检测MIC1重组蛋白质与唾液酸乳糖亲和力Fig.7 The affinity between MIC1 recombinant protein and sialyllactose detected by BLI
    图8 MIC1重组蛋白质多克隆抗体的制备及特异性分析Fig.8 Preparation and specificity analysis of polyclonal antibody for MIC1 recombinant protein
    参考文献
    相似文献
    引证文献
引用本文

李响,张小涵,李美琪,陈冉,冯颖,李林,桑晓宇,杨娜.弓形虫MIC1蛋白在杆状病毒系统中的表达及活性分析[J].华中农业大学学报,2024,43(1):210-218

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-04-18
  • 在线发布日期: 2024-01-30
文章二维码