Article(id=1307013157998850151, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.02.033, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1748448000000, receivedDateStr=2025-05-29, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789545819996, onlineDateStr=2026-09-16, pubDate=1771776000000, pubDateStr=2026-02-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789545819996, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789545819996, creator=13701087609, updateTime=1789545819996, updator=13701087609, issue=Issue{id=1307013104081068276, tenantId=1146029695717560320, journalId=1306274286668972124, year='2026', volume='57', issue='2', pageStart='569', pageEnd='1176', issueExtLink='null', onlineDate='null', pubDate='1771776000000', pubDateStr='2026-02-23', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789545807142, creator='13701087609', updateTime=1789609910854, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307281975350419753, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307281975350419754, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=965, endPage=978, ext={EN=ArticleExt(id=1307013158221148264, articleId=1307013157998850151, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=Expression, Purification and Enzymatic Activity Verification of Feline Infectious Peritonitis Virus RdRp Complex, columnId=1307007432299930010, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=PREVENTIVE VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=
The non-structure protein (NSP) 12 of feline infectious peritonitis virus (FIPV) serves as the catalytic core component of the RNA-dependent RNA polymerase (RdRp). However, the molecular mechanisms regulating its interactions with NSP7 and NSP8, as well as the enzymatic activity and function of the RdRp complex, remain to be fully elucidated. This study aims to investigate the molecular characteristics of NSP12, explore its interaction with NSP7 and NSP8, and verify the enzymatic activity of the RdRp complex. Firstly, the physicochemical properties and structural features of NSP12 were predicted by bioinformatics analysis. To investigate the interaction between NSP7, NSP8 and NSP12 in the FIPV RdRp complex, pcDNA3.1-Flag-NSP7, pcDNA3.1-HA-NSP8 and pcDNA3.1-Myc-NSP12 plasmids were constructed and expressed in 293T cells. The protein interactions and co-localization were detected using co-immunoprecipitation (Co-IP), pull-down, and indirect immunofluorescence assay (IFA). Secondly, the NSP7, NSP8 and NSP12 genes of FIPV were amplified by PCR and homologously recombined into the pET-30α vector to construct prokaryotic expression recombinant plasmids. The induced expression conditions were further optimized, and the proteins were purified by nickel column affinity chromatography and concentrated using an ultrafiltration tube to obtain the RdRp complex. Finally, an in vitro RNA elongation system for FIPV RdRp was established, and the enzymatic activity of the RdRp complexes obtained above was tested using the gel method. Bioinformatics analysis showed that NSP12 was a stable hydrophilic protein, containing 43.51% α helices, 45.02% random coils and 90 potential phosphorylation sites. The Co-IP, pull-down, and IFA assays confirmed the interaction and co-localization of NSP7, NSP8 and NSP12 in 293T cells. NSP7 and NSP8 were expressed as inclusion bodies, with molecular masses of 10 and 23 ku, respectively. In contrast, NSP12 was expressed as a soluble protein, with a molecular mass of 105 ku. The results of the enzyme activity assay demonstrated that the RdRp complex exhibited the capacity to extend the RNA template strand. Conversely, NSP12 alone exhibited no such activity. In this study, the FIPV RdRp complex was purified by prokaryotic expression and an enzyme activity detection system was established in vitro. It was confirmed for the first time that NSP12 from the FIPV-DF2 strain requires the formation of a complex with NSP7 and NSP8 to exert its RdRp function. This study lays the foundation for further exploring the biological function of FIPV RdRp and developing antiviral drugs targeting RdRp.
, authors=Wei YANG
1, Yun LU
1, Ran ZHANG
1, Wanting ZHANG
1, Ruiwen REN
2, 3, Hongxia JIANG
1, Youzhi TANG
1, authorsList=Wei YANG, Yun LU, Ran ZHANG, Wanting ZHANG, Ruiwen REN, Hongxia JIANG, Youzhi TANG, authorCompany=null, correspAuthors=Youzhi TANG, authorNote=null, correspAuthorsNote=
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307013161236852855, articleId=1307013157998850151, tenantId=1146029695717560320, journalId=1306274286668972124, language=CN, title=猫传染性腹膜炎病毒RdRp复合物的表达纯化及酶活性验证, columnId=1307007432459313564, journalTitle=畜牧兽医学报, columnName=预防兽医, runingTitle=null, highlight=null, articleAbstract=
猫传染性腹膜炎病毒(feline infectious peritonitis virus,FIPV)的非结构蛋白(non structure protein,NSP)12是RNA依赖性RNA聚合酶(RNA-dependent RNA polymerase,RdRp)核心组分,但其与辅助因子NSP7、NSP8之间的相互作用以及RdRp复合体的功能尚不清楚。本研究旨在分析NSP12的分子特征,探究其与NSP7、NSP8的相互作用,并验证RdRp复合体的酶活性。首先,采用生物信息学方法预测NSP12的理化性质及结构特征。为探究FIPV RdRp复合物中NSP7、NSP8和NSP12之间的相互作用,构建了pcDNA3.1-Flag-NSP7,pcDNA3.1-HA-NSP8和pcDNA3.1-Myc-NSP12质粒,转染至293T细胞后,利用免疫共沉淀(co-inmunoprecipitation,Co-IP)、蛋白质体外结合(Pull-down)和间接免疫荧光试验(indirect immunofluorescence assay,IFA)检测蛋白互作及共定位。其次,利用PCR扩增FIPV的NSP7、NSP8和NSP12基因,并将其分别同源重组至pET-30α载体,构建原核表达重组质粒。进一步优化诱导表达条件,采用镍柱亲和层析纯化蛋白,并通过超滤管浓缩获得RdRp复合物。最后,建立FIPV RdRp体外RNA延伸体系,并基于凝胶方法检测RdRp复合物的酶活性。生物信息学分析表明,NSP12为稳定的亲水性蛋白,包含43.51%的α螺旋、45.02%的无规则卷曲以及90个潜在磷酸化位点。Co-IP、Pull-down和IFA试验证实,在293T细胞中NSP7、NSP8与NSP12之间存在相互作用并发生共定位。原核表达结果显示,NSP7和NSP8蛋白以包涵体形式表达,相对分子质量为10和23 ku,NSP12则以可溶性蛋白形式表达,相对分子质量为105 ku。酶活性试验结果表明,RdRp复合物能够延伸RNA模板链,而单独的NSP12则无此活性。本研究通过原核表达纯化了FIPV RdRp复合物,并建立了体外酶活性检测体系。首次证实FIPV-DF2毒株的NSP12需与NSP7、NSP8形成复合体才能发挥RdRp功能,为进一步探究FIPV RdRp的生物学功能及开发靶向RdRp的抗病毒药物奠定基础。
, authors=杨微
1, 卢昀
1, 张然
1, 张婉婷
1, 任瑞文
2, 3, 蒋红霞
1, 汤有志
1, authorsList=杨微, 卢昀, 张然, 张婉婷, 任瑞文, 蒋红霞, 汤有志, authorCompany=null, correspAuthors=汤有志, authorNote=
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1, address=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307282337553731822, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282335766958315, language=CN, stringName=杨微, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642, bio={"content":"
杨微,主要从事基础兽医药理学研究,E-mail: 15776581772@163.com
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杨微,主要从事基础兽医药理学研究,E-mail: 15776581772@163.com
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1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China), AuthorCompanyExt(id=1307282335511105763, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642)])]), Author(id=1307282337843138800, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307282338153517298, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282337843138800, language=EN, stringName=Yun LU, firstName=Yun, middleName=null, lastName=LU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307282338254180595, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282337843138800, language=CN, stringName=卢昀, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307282335494328545, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=1., ext=[AuthorCompanyExt(id=1307282335502717154, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China), AuthorCompanyExt(id=1307282335511105763, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642)])]), Author(id=1307282338342260981, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307282338434535671, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282338342260981, language=EN, stringName=Ran ZHANG, firstName=Ran, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307282338652639480, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282338342260981, language=CN, stringName=张然, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307282335494328545, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=1., ext=[AuthorCompanyExt(id=1307282335502717154, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China), AuthorCompanyExt(id=1307282335511105763, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642)])]), Author(id=1307282338753302778, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307282338996572412, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282338753302778, language=EN, stringName=Wanting ZHANG, firstName=Wanting, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307282339072069885, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282338753302778, language=CN, stringName=张婉婷, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307282335494328545, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=1., ext=[AuthorCompanyExt(id=1307282335502717154, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642)])]), Author(id=1307282339155955967, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307282339244036354, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282339155955967, language=EN, stringName=Ruiwen REN, firstName=Ruiwen, middleName=null, lastName=REN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2.Center for Disease Control and Prevention of Southern Theater Command,Guangzhou 510507,China
3.Guangdong Arbovirus Diseases Emergency Technology Research Center,Guangzhou 510507,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307282339323728131, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, authorId=1307282339155955967, language=CN, stringName=任瑞文, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2.南部战区疾病预防控制中心,广州 510507
3.广东省虫媒病毒性传染疾病应急技术研究中心,广州 510507, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307282335590797540, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=2., ext=[AuthorCompanyExt(id=1307282335599186149, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335590797540, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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PLoS One,2013,8(2):e56168., articleTitle=null, refAbstract=null)], funds=[Fund(id=1307282344382058792, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, awardId=32473093, language=CN, fundingSource=国家自然科学基金(32473093), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1307282335494328545, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=1., ext=[AuthorCompanyExt(id=1307282335502717154, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China), AuthorCompanyExt(id=1307282335511105763, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335494328545, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.华南农业大学兽医学院 广东省兽药研制与安全评价重点实验室,广州 510642)]), AuthorCompany(id=1307282335590797540, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=2., ext=[AuthorCompanyExt(id=1307282335599186149, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335590797540, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.Center for Disease Control and Prevention of Southern Theater Command,Guangzhou 510507,China), AuthorCompanyExt(id=1307282335607574758, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335590797540, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.南部战区疾病预防控制中心,广州 510507)]), AuthorCompany(id=1307282335674683623, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, xref=3., ext=[AuthorCompanyExt(id=1307282335683072232, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335674683623, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.Guangdong Arbovirus Diseases Emergency Technology Research Center,Guangzhou 510507,China), AuthorCompanyExt(id=1307282335687266537, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, companyId=1307282335674683623, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.广东省虫媒病毒性传染疾病应急技术研究中心,广州 510507)])], figs=[ArticleFig(id=1307282342947606810, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.1, caption=
Bioinformatics analysis of NSP12 protein from the FIPV-DF2 strainA. Hydrophilic/hydrophobic analysis of NSP12 protein; B. Secondary structure prediction of NSP12 protein; C. Tertiary structure prediction of NSP12 protein; D. Phosphorylation sites prediction of NSP12 protein; E. Transmembrane structure prediction of NSP12 protein; F. Signal peptide prediction of NSP12 protein
, figureFileSmall=Evc6t6Wt2LqTv54q+ApGug==, figureFileBig=wKEF3vVJ85Kp2I/UwdDfvA==, tableContent=null), ArticleFig(id=1307282343039881499, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图1, caption=
FIPV-DF2毒株NSP12蛋白的生物信息学分析A. NSP12蛋白亲/疏水性分析;B. NSP12蛋白二级结构预测;C. NSP12蛋白三级结构预测;D. NSP12蛋白磷酸化位点预测;E. NSP12蛋白跨膜结构预测;F. NSP12蛋白信号肽预测
, figureFileSmall=Evc6t6Wt2LqTv54q+ApGug==, figureFileBig=wKEF3vVJ85Kp2I/UwdDfvA==, tableContent=null), ArticleFig(id=1307282343144739100, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.2, caption=
Construction and expression of NSP7, NSP8 and NSP12 recombinant plasmidsA. Construction of the NSP7 recombinant plasmid; B. Construction of the NSP8 recombinant plasmid; C. Construction of the NSP12 recombinant plasmid; D. Expression of NSP7 in 293T cells; E. Expression of NSP8 in 293T cells; F. Expression of NSP12 in 293T cells. M. Protein marker; 1. Untreated 293T cell lysate; 2. 293T cell lysate transfected with pcDNA3.1-Flag; 3. 293T cell lysate transfected with pcDNA3.1-Flag-NSP7; 4. 293T cell lysate transfected with pcDNA3.1-HA; 5. 293T cell lysate transfected with pcDNA3.1-HA-NSP8; 6. 293T cell lysate transfected with pcDNA3.1-Myc; 7. 293T cell lysate transfected with pcDNA3.1-Myc-NSP12
, figureFileSmall=tmOHYFUR7D+M+JoZL2knXA==, figureFileBig=Rykqbxle3IKwzuFqKjcSFQ==, tableContent=null), ArticleFig(id=1307282343232819485, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图2, caption=
NSP7、NSP8和NSP12重组质粒构建及表达A. NSP7重组质粒构建;B. NSP8重组质粒构建;C. NSP12重组质粒构建;D. NSP7在293T细胞中表达;E. NSP8在293T细胞中表达;F. NSP12在293T细胞中表达。M. 蛋白相对分子质量标准;1. 未处理的293T细胞裂解液;2. 转染pcDNA3.1-Flag的293T细胞裂解液;3. 转染pcDNA3.1-Flag-NSP7的293T细胞裂解液;4. 转染pcDNA3.1-HA的293T细胞裂解液;5. 转染pcDNA3.1-HA-NSP8的293T细胞裂解液;6. 转染pcDNA3.1-Myc的293T细胞裂解液;7. 转染pcDNA3.1-Myc-NSP12的293T细胞裂解液
, figureFileSmall=tmOHYFUR7D+M+JoZL2knXA==, figureFileBig=Rykqbxle3IKwzuFqKjcSFQ==, tableContent=null), ArticleFig(id=1307282343329288478, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.3, caption=
Interactions of NSP7, NSP8, and NSP12A. The interaction between NSP12 and NSP7 or NSP8 was evaluated by Co-IP; B. The interaction between NSP8 and NSP7 or NSP12 was evaluated by Co-IP; C. The interaction between NSP7 and NSP8 or NSP12 was evaluated by Co-IP; D. The direct interaction between NSP7 and NSP12 was evaluated by Pull-down; E. The direct interaction between NSP7 and NSP8 was evaluated by Pull-down; F. The direct interaction between NSP8 and NSP12 was evaluated by Pull-down; G. The colocalization of NSP8 and NSP12 was evaluated by IFA; H. The colocalization of NSP7 and NSP12 was evaluated by IFA; I. The colocalization of NSP7 and NSP8 was evaluated by IFA. In Figures G to I, the scale bar for the first four rows is 500 μm, and the scale bar for the fifth row is 100 μm
, figureFileSmall=5F6GA0RK+gGGP8Mn4fR6xA==, figureFileBig=iKfD9LuYvoO6gtu6MR0vSg==, tableContent=null), ArticleFig(id=1307282343429951775, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图3, caption=
NSP7、NSP8和NSP12之间的相互作用A. Co-IP检测NSP12与NSP7、NSP8的相互作用;B. Co-IP检测NSP8与NSP7、NSP12的相互作用;C. Co-IP检测NSP7与NSP8、NSP12的相互作用;D. Pull-down检测NSP7和NSP12的直接相互作用;E. Pull-down检测NSP7和NSP8的直接相互作用;F. Pull-down检测NSP8和NSP12的直接相互作用;G. IFA检测NSP8和NSP12的共定位;H. IFA检测NSP7和NSP12的共定位;I. IFA检测NSP7和NSP8的共定位。图G~I中,第1-4行分图标尺=500 μm,第5行分图标尺=100 μm
, figureFileSmall=5F6GA0RK+gGGP8Mn4fR6xA==, figureFileBig=iKfD9LuYvoO6gtu6MR0vSg==, tableContent=null), ArticleFig(id=1307282343526420768, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.4, caption=
Amplification of NSP7, NSP8 and NSP12 genes and construction of recombinant plasmidsA. Amplification of the NSP7 gene fragment (1-3. NSP7 gene fragment); B. Amplification of the NSP8 gene fragment (1-3. NSP8 gene fragment); C. Amplification of the NSP12 gene fragment (1-3. NSP12 gene fragment); D. Colony PCR identification of the NSP7 recombinant plasmid (1-7. NSP7 positive clones); E. Colony PCR identification of the NSP8 recombinant plasmid (1-7. NSP8 positive clones); F. Colony PCR identification of the NSP12 recombinant plasmid (1-7. NSP12 positive clones); M. DNA marker; N. Negative control
, figureFileSmall=21wP9Y3RNWPP3mU6sb8lRw==, figureFileBig=lcpiCpSccqwDL5/7a+Lbiw==, tableContent=null), ArticleFig(id=1307282343643861281, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图4, caption=
NSP7、NSP8和NSP12基因扩增及重组质粒构建A. NSP7基因片段扩增(1~3. NSP7基因片段);B. NSP8基因片段扩增(1~3. NSP8基因片段);C. NSP12基因片段扩增(1~3. NSP12基因片段);D. NSP7重组质粒的菌落PCR鉴定(1~7. NSP7阳性克隆);E. NSP8重组质粒的菌落PCR鉴定(1~7. NSP8阳性克隆);F. NSP12重组质粒的菌落PCR鉴定(1~7. NSP12阳性克隆);M. DNA分子质量标准;N. 阴性对照
, figureFileSmall=21wP9Y3RNWPP3mU6sb8lRw==, figureFileBig=lcpiCpSccqwDL5/7a+Lbiw==, tableContent=null), ArticleFig(id=1307282343740330274, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.5, caption=
Purification of NSP7, NSP8, NSP12 and RdRp complex proteinsA. Expression of NSP7 protein under different induction conditions; B. Expression of NSP8 protein under different induction conditions; C. Expression of NSP12 protein under different induction conditions; D. Detection of NSP7, NSP8, NSP12 and RdRp complex proteins by SDS-PAGE; M. Protein marker;1-3. Samples of whole-cell lysate, supernatant, and pellet fractions collected after induction at 37 ℃ for 2 h (220 r·min-1);4-6. Samples of whole-cell lysate, supernatant, and pellet fractions collected after induction at 37 ℃ for 4 h (220 r·min-1);7-9. Samples of whole-cell lysate, supernatant, and pellet fractions collected after induction at 25 ℃ for 6 h (220 r·min-1);10-12. Samples of whole-cell lysate, supernatant, and pellet fractions collected after induction at 16 ℃ for 15 h (180 r·min-1)
, figureFileSmall=q1hr8gT4uWpguH9BWYIe/g==, figureFileBig=/Gk5n3Zxioa2NPhGLMM0Bw==, tableContent=null), ArticleFig(id=1307282343820022051, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图5, caption=
NSP7、NSP8、NSP12和RdRp复合物蛋白纯化A. 不同诱导条件下 NSP7 蛋白表达;B. 不同诱导条件下 NSP8 蛋白表达;C. 不同诱导条件下 NSP12 蛋白表达;D. SDS-PAGE 检测 NSP7、NSP8、NSP12 和 RdRp 复合物蛋白。M. 蛋白相对质量标准;1~3. 37 ℃,2 h,220 r·min-1诱导表达后的全菌、上清、沉淀;4~6. 37 ℃,4 h,220 r·min‒1诱导表达后的全菌、上清、沉淀;7~9. 25 ℃,6 h,220 r•min-1诱导表达后的全菌、上清、沉淀;10~12. 16 ℃,15 h,180 r·min-1诱导表达后的全菌、上清、沉淀
, figureFileSmall=q1hr8gT4uWpguH9BWYIe/g==, figureFileBig=/Gk5n3Zxioa2NPhGLMM0Bw==, tableContent=null), ArticleFig(id=1307282343908102436, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Fig.6, caption=
RdRp enzyme activity assayA. Schematic diagram of primer-template extension by the RdRp complex; B left. Detection of RNA extension products by RNA dye staining; B right. Fluorescence-based detection of RNA extension products; 1. Only primer-template; 2. Primer-template and RdRp complex; 3. Primer-template and NSP12 protein
, figureFileSmall=B3CUzy17OQimMpCv2VsEiw==, figureFileBig=k4i97y8uCgedURgC4H1tQg==, tableContent=null), ArticleFig(id=1307282343991988517, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=图6, caption=
RdRp酶活性试验A.引物-模板和RdRp复合物延伸示意图;B左.RNA染料检测RNA延伸链;B右.荧光检测RNA延伸链;1.仅含引物-模板;2.引物-模板和RdRp复合物;3.引物-模板和NSP12蛋白
, figureFileSmall=B3CUzy17OQimMpCv2VsEiw==, figureFileBig=k4i97y8uCgedURgC4H1tQg==, tableContent=null), ArticleFig(id=1307282344113623334, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=EN, label=Table 1, caption=
List of sequences
, figureFileSmall=null, figureFileBig=null, tableContent=
名称 Name | 序列(5′→3′) Sequence |
|---|
| pcDNA3.1-NSP7-F | CTATAGGGAGACCCAAGCTGGCTAGCATGGATTACAAGGACGACGATGACAAGTC-TAAGCTGACCGAGATGA |
| pcDNA3.1-NSP7-R | GATCCGAGCTCGGTACCAAGCTTCTGCAGAATGGTGG |
| pcDNA3.1-NSP8-F | CTATAGGGAGACCCAAGCTGGCTAGCATGTACCCTTATGATGTGCCCGACTATGC-CAGCGTGGCCAGC |
| pcDNA3.1-NSP8-R | GATCCGAGCTCGGTACCAAGCTTCTGCAGCTTGGTAG |
| pcDNA3.1-NSP12-F | CTATAGGGAGACCCAAGCTGGCTAGCATGGAGCAAAAGCTCATTTCTGAAGAGGA-CTTGCAGAGCTACCTGAACGAATGC |
| pcDNA3.1-NSP12-R | GTTTAAACGGGCCCTCTAGACTCGAGCTGCAGCACGGTGGAT |
| pcDNA3.1通用引物-F | ATGGTGATGCGGTTTTGG |
| pcDNA3.1通用引物-R | TGGCAACTAGAAGGCACAG |
| pET-30α-NSP7-F | TTTAACTTTAAGAAGGAGATATACATATGTCTAAGCTGACCGAGATGAAGTGTAC |
| pET-30α-NSP7-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGCAGAATGGT-GGTGTTCTC |
| pET-30α-NSP8-F | TTTAACTTTAAGAAGGAGATATACATATGAGCGTGGCCAGCG |
| pET-30α-NSP8-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGCAGCTTGGT-AGTGCG |
| pET-30α-NSP12-F | TTTAACTTTAAGAAGGAGATATACATATGCAGAGCTACCTGAACGAATGC |
| pET-30α-NSP12-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGC |
| pET-30α通用引物-F | AGTAGTAGGTTGAGGCCGT |
| pET-30α通用引物-R | CCCCTCAAGACCCGTTT |
| RNA模板 | UUUUUUUUUUAUAACUUAAUCUCACAUAGC |
| RNA引物 | FAM’-GCUAUGUGAGAUUAAGUUAU |
), ArticleFig(id=1307282344197509415, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013157998850151, language=CN, label=表1, caption=
序列清单
, figureFileSmall=null, figureFileBig=null, tableContent=
名称 Name | 序列(5′→3′) Sequence |
|---|
| pcDNA3.1-NSP7-F | CTATAGGGAGACCCAAGCTGGCTAGCATGGATTACAAGGACGACGATGACAAGTC-TAAGCTGACCGAGATGA |
| pcDNA3.1-NSP7-R | GATCCGAGCTCGGTACCAAGCTTCTGCAGAATGGTGG |
| pcDNA3.1-NSP8-F | CTATAGGGAGACCCAAGCTGGCTAGCATGTACCCTTATGATGTGCCCGACTATGC-CAGCGTGGCCAGC |
| pcDNA3.1-NSP8-R | GATCCGAGCTCGGTACCAAGCTTCTGCAGCTTGGTAG |
| pcDNA3.1-NSP12-F | CTATAGGGAGACCCAAGCTGGCTAGCATGGAGCAAAAGCTCATTTCTGAAGAGGA-CTTGCAGAGCTACCTGAACGAATGC |
| pcDNA3.1-NSP12-R | GTTTAAACGGGCCCTCTAGACTCGAGCTGCAGCACGGTGGAT |
| pcDNA3.1通用引物-F | ATGGTGATGCGGTTTTGG |
| pcDNA3.1通用引物-R | TGGCAACTAGAAGGCACAG |
| pET-30α-NSP7-F | TTTAACTTTAAGAAGGAGATATACATATGTCTAAGCTGACCGAGATGAAGTGTAC |
| pET-30α-NSP7-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGCAGAATGGT-GGTGTTCTC |
| pET-30α-NSP8-F | TTTAACTTTAAGAAGGAGATATACATATGAGCGTGGCCAGCG |
| pET-30α-NSP8-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGCAGCTTGGT-AGTGCG |
| pET-30α-NSP12-F | TTTAACTTTAAGAAGGAGATATACATATGCAGAGCTACCTGAACGAATGC |
| pET-30α-NSP12-R | GTGGTGGTGGTGGTGCTCGAGTTAATGGTGATGGTGATGATGCTGC |
| pET-30α通用引物-F | AGTAGTAGGTTGAGGCCGT |
| pET-30α通用引物-R | CCCCTCAAGACCCGTTT |
| RNA模板 | UUUUUUUUUUAUAACUUAAUCUCACAUAGC |
| RNA引物 | FAM’-GCUAUGUGAGAUUAAGUUAU |
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