کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9289315 | 1594410 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Partial reconstitution of hepatitis C virus RNA polymerization by heterologous expression of NS5B polymerase and template RNA in bacterial cell
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
ویروس شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The hepatitis C virus (HCV) is a major etiological agent causing chronic hepatitis in humans. Since the virus does not grow in a cell culture, the direct measurement of viral replication is impossible. Therefore, the current study presents a surrogate model system using a viral polymerase and RNA template. A plasmid expressing the HCV NS5B polymerase was maintained with a plasmid containing a reporter gene in an Escherichia coli cell. The reporter construct contained the HCV 5â² untranslated region (UTR) followed by a luciferase gene with a specific orientation so that a minus-sense transcript containing the luciferase fused to the 5â² UTR was produced after the initial transcription. When the HCV NS5B polymerase was expressed in the same cell, the primary transcript was recognized by the polymerase due to the presence of the minus-sense 5â² UTR, and a secondary transcript containing a plus-sense luciferase gene was produced. Thus, a simple luciferase assay was able to measure the HCV NS5B polymerase activity. The production of minus- and plus-sense transcripts was confirmed by an RT-PCR, while the production of HCV NS5B and expression of the reporter luciferase in the bacterial cell were confirmed by immunofluorescence microscopy. The polymerization occurred in the absence of any other viral/host factors. Accordingly, this would appear to be the first study to demonstrate that the heterologous expression of an animal viral RNA polymerase and its template in a bacterial cell can partially reconstitute the polymerization reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Virus Research - Volume 114, Issues 1â2, December 2005, Pages 158-163
Journal: Virus Research - Volume 114, Issues 1â2, December 2005, Pages 158-163
نویسندگان
Sangyoon Lee, Jong-Ho Lee, Young Hoon Kee, Mi Young Park, Heejoon Myung,