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小菜蛾类钙粘蛋白片段的原核融合表达载体
构建及其条件优化
引用本文:郑晓旭,杨峰山,朱勋,张友军. 小菜蛾类钙粘蛋白片段的原核融合表达载体
构建及其条件优化[J]. 中国蔬菜, 2013, 1(14): 39
作者姓名:郑晓旭  杨峰山  朱勋  张友军
作者单位:(;1.黑龙江大学生命科学学院,微生物黑龙江省高校重点实验室,黑龙江哈尔滨150080 ;2 中国农;业科学院蔬菜花卉研究所 ,北京1 00081)
基金项目:国家“863”计划项目,农业部公益性行业科研专项
摘    要:构建了小菜蛾钙粘蛋白片段基因的重组载体,为提高其在大肠杆菌中的表达量,研究了时间、
温度、IPTG 浓度对融合蛋白表达量以及可溶性的影响。结果表明,使用LB 培养基37 ℃培养1.5 h 后,采
用终浓度为0.1 mmol·L-1 的IPTG,在25 ℃ 180 r·min-1 诱导培养36 h 融合蛋白的表达量最大,并且温
度的改变对融合蛋白的可溶性几乎没有影响,SDS-PAGE 电泳检测结果表明,融合蛋白的分子质量与预计
大小一致,约为16 kDa。



关 键 词:小菜蛾  钙粘蛋白  原核表达  优化  
收稿时间:2013-04-26;

Prokaryotic Expression Vector Construction of Plutella xylostella Cadherin Fragments and Optimization of Its Conditions
ZHENG Xiao-xu , YANG Feng-shan , ZHU Xun , ZHANG You-jun. Prokaryotic Expression Vector Construction of Plutella xylostella Cadherin Fragments and Optimization of Its Conditions[J]. China Vegetables, 2013, 1(14): 39
Authors:ZHENG Xiao-xu    YANG Feng-shan    ZHU Xun    ZHANG You-jun
Affiliation:(;1.Key Laboratory of Microbiology of Heilongjiang Province, College of Life Science, Heilongjiang University,;Harbin 150080, Heilongjiang, China; ;2.Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences,;Beijing 100081, China)
Abstract:In this study,we constructed a recombinant of Plutella xylostella cadherin gene
fragment.In order to enhance its expression in Escherichia coli,we studied the effect of time,
temperature and IPTG concentration on fusion protein expression and its solubility.The results showed
that the fusion protein gave rise to the maximum expression when host cells were cultured in LB at 37 ℃
for 1.5 h and then induced by 0.1 mmol·L-1 IPTG at 25℃ 180 r·min-1 for 36 h.And the temperature
change had little impact on the solubility of fusion proteins. SDS-PAGE test also indicated that the
molecular weight of fusion proteins was the same as expected,wh ich is about 16 kDa.
Keywords:Plutella xylostella  Cadherin  Prokaryotic expression  Optimization
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