國家衛生研究院 NHRI:Item 3990099045/4506
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    题名: Epstein-Barr virus nuclear antigen 1 is a DNA-binding protein with strong RNA-binding activity
    作者: Lu, CC;Wu, CW;Chang, SC;Chen, TY;Hu, CR;Yeh, MY;Chen, JY;Chen, MR
    贡献者: National Institute of Cancer Research
    摘要: Epstein-Barr virus (EBV) nuclear antigen 1 (EBNA-1) plays key roles in both the regulation of gene expression and the replication of the EBV genome in latently infected cells. To characterize the RNA-binding activity of EBNA-1, it was demonstrated that EBNA-1 binds efficiently to RNA homopolymers that are composed of poly(G) and weakly to those composed of poly(U). All three RGG boxes of EBNA-1 contributed additively to poly(G)-binding activity and could mediate RNA binding when attached to a heterologous protein in an RNA gel mobility-shift assay. In vitro-transcribed EBV and non-EBV RNA probes revealed that EBNA-1 bound to most RNAs examined and the affinity increased as the content of G and U increased, as demonstrated in competition assays. Among these probes, the 5' non-coding region (NCR) (nt 131-278) of hepatitis C virus RNA appeared to be the strongest competitor for EBNA-1 binding to the EBV-encoded small nuclear RNA 1 (EBER1) probe, whereas a mutant 5' NCR RNA with partially disrupted secondary structure was a weak competitor. Furthermore, the interaction of enclogenous EBNA-1 and EBER1 in EBV-infected cells was demonstrated by a ribonucleoprotein immunoprecipitation assay. These results revealed that EBNA-1 is a DNA-binding protein with strong binding activity to a relatively broad spectrum of RNA and suggested an additional biological impact of EBNA-1 through its ability to bind to RNA.
    日期: 2004-10
    關聯: Journal of General Virology. 2004 Oct;85(Part 10):2755-2765.
    Link to: http://dx.doi.org/10.1099/vir.0.80239-0
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0022-1317&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000224329300002
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=5444238400
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