國家衛生研究院 NHRI:Item 3990099045/2189
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/2189


    Title: Identification and characterization of a structural protein of hepatitis B virus: A polymerase and surface fusion protein encoded by a spliced RNA
    Authors: Huang, HL;Jeng, KS;Hu, CP;Tsai, CH;Lo, SJ;Chang, CM
    Contributors: Division of Molecular and Genomic Medicine
    Abstract: The hepatitis B virus (HBV) genome is known to contain four conserved and overlapped open reading frames (ORFs) encoding the viral core, polymerase (P), surface (S), and X proteins. Whether HBV encodes other proteins has long been a major interest in the field. Using P-32-labeling of an introduced protein kinase A site attached to the N- or C-terminus of the HBV polymerase gene, a 43-kDa P-S fusion protein was detected in cell lysate, secreted virions, and 22-nm subviral particles. Immunobiochemical studies showed that the 43-kDa protein contains the epitopes of the N-terminus of polymerase and most parts of the surface proteins This 43-kDa protein was shown to be a glycoprotein, similar to the surface protein. RT-PCR and sequence analyses identified a spliced mRNA which was derived from pregenomic RNA with a deletion of 454 nucleotides (nt) from nt 2447 to 2902. This splice event creates a P-S fusion ORF This finding is consistent with the result obtained from an immunobiochemical study. Mutations at the splice donor or acceptor site on the HBV genome abrogated the production of the 43-kDa protein. These mutants had no effect on viral replication in transfected HuH-7 cells. However, this P-S fusion protein is able to substitute for the LS protein in Virion maturation. On the basis of these results, we conclude that the 43-kDa protein is a polymerase-surface fusion protein encoded by a spliced RNA Similar to the LS protein, the 43-kDa P-S fusion protein is a structural protein of HBV and might play a role in the HBV life cycle. (C) 2000 Academic Press.
    Keywords: Virology
    Date: 2000-09-30
    Relation: Virology. 2000 Sep;275(2):398-410.
    Link to: http://dx.doi.org/10.1006/viro.2000.0478
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0042-6822&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000089697900020
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0034734828
    Appears in Collections:[Chung-Ming Chang] Periodical Articles
    [King-Song Jeng(1997-2002)] Periodical Articles

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