真核表达MERS-CoV刺突蛋白亚单位的信号肽序列优化研究
发布时间:2022-01-24 03:18
中东呼吸综合征冠状病毒(Middle East respiratory syndrome coronavirus,MERS-CoV)的刺突蛋白(Spike,S)亚单位1(S1)是引起宿主免疫反应和产生中和抗体的主要靶抗原,也是疫苗研发和病原检测的重要靶标,选用适宜的真核表达系统高效表达S1蛋白是进行相关研究的基础。为确定MERS-CoV S1在哺乳动物细胞中高效分泌性表达的信号肽序列,构建了含高斯荧光素酶(Gaussia luciferase,GLuc)、人组织纤溶酶原激活剂(Tissue plasminogen activator,tPA)及小鼠免疫球蛋白G的2a亚型(Mouse immunoglobular G subtype 2a,MIgG2a)7个信号肽(原始序列和改造序列)序列的MERS-CoV S1表达质粒,瞬时转染细胞后,通过Western Blot检测并比较细胞培养上清和裂解液中S1的表达水平及分泌表达效率(条带密度灰度扫描比),并对哺乳动物细胞表达的S1蛋白的纯度与抗原特性进行了分析。结果表明7种信号肽在293T、BHK21和ExpiCHO-STM
【文章来源】:病毒学报. 2019,35(01)北大核心CSCD
【文章页数】:7 页
【部分图文】:
pLQ-uni-51表达质粒示意图和信号肚序列
pressionefficiencyofMERS‐CoVS1inExpiCHO‐STMwithGLuc‐2,tPA‐1,tPA‐2SPsNotes:A.TheexpressionofMERS‐CoVS1inculturesupernatant(S)andcelllysate(L)ofExpiCHO‐STMdetectedbyWesternBlot;B.TherelativeexpressionlevelofMERS‐CoVS1insupernatant(S/β‐actin)ofExpiCHO‐STM;C.Thesecretoryexpressionefficiency(S/L)ofMERS‐CoVS1inExpiCHO‐STM.1:Vectorcontrol;2:GLuc‐2;3:tPA‐1;4:tPA‐2图5ExpiCHOSTM中大量表达MERSCoVS1经纯化后的纯度和抗原性分析注:A:a:SDS‐PAGE;b:WesternBlot分析MERS‐CoVS1抗原特异性;B:ELISA分析MERS‐CoVS1抗原特异性Figure5AnalysisofpurityandantigenicityofpurifiedMERS‐CoVS1fromExpiCHO‐STMNotes:A.a:SDS‐PAGE;b:AntigenicityanalysisofMERS‐CoVS1byWesternBlot;B:AntigenicityanalysisofMERS‐CoVS1byELISA··24
本文编号:3605737
【文章来源】:病毒学报. 2019,35(01)北大核心CSCD
【文章页数】:7 页
【部分图文】:
pLQ-uni-51表达质粒示意图和信号肚序列
pressionefficiencyofMERS‐CoVS1inExpiCHO‐STMwithGLuc‐2,tPA‐1,tPA‐2SPsNotes:A.TheexpressionofMERS‐CoVS1inculturesupernatant(S)andcelllysate(L)ofExpiCHO‐STMdetectedbyWesternBlot;B.TherelativeexpressionlevelofMERS‐CoVS1insupernatant(S/β‐actin)ofExpiCHO‐STM;C.Thesecretoryexpressionefficiency(S/L)ofMERS‐CoVS1inExpiCHO‐STM.1:Vectorcontrol;2:GLuc‐2;3:tPA‐1;4:tPA‐2图5ExpiCHOSTM中大量表达MERSCoVS1经纯化后的纯度和抗原性分析注:A:a:SDS‐PAGE;b:WesternBlot分析MERS‐CoVS1抗原特异性;B:ELISA分析MERS‐CoVS1抗原特异性Figure5AnalysisofpurityandantigenicityofpurifiedMERS‐CoVS1fromExpiCHO‐STMNotes:A.a:SDS‐PAGE;b:AntigenicityanalysisofMERS‐CoVS1byWesternBlot;B:AntigenicityanalysisofMERS‐CoVS1byELISA··24
本文编号:3605737
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