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A Homokaryon Assay for Nucleocytoplasmic Shuttling Activity of HBV Core Protein

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Hepatitis B Virus

Part of the book series: Methods in Molecular Biology ((MIMB,volume 1540))

Abstract

Hepatitis B virus (HBV) core protein (HBc) can be present in both nucleus and cytoplasm. The arginine-rich domain (ARD) at the cytoplasmic tail of HBc contains both a nuclear localization signal (NLS) and nuclear export signal (NES). We established a homokaryon assay to detect the dynamic trafficking of HBc between nucleus and cytoplasm in hepatocytes. Using immunofluorescence assay (IFA) and PEG-induced cell-cell fusion, we demonstrated that a chimeric reporter protein of SV40 large T antigen, when fused in-frame with HBc ARD, can shuttle from a donor nuclei (green) to the recipient nuclei (red) in the context of binucleated or polynucleated hybrid cells. The shuttling activity driven by HBc ARD can be measured quantitatively by this IFA method.

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Acknowledgments

This work was supported by Academia Sinica, National Health Research Institute (NHRI-EX102-10203BI), and Ministry of Science and Technology, Taiwan.

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Correspondence to Chiaho Shih .

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Yang, CC., Li, HC., Shih, C. (2017). A Homokaryon Assay for Nucleocytoplasmic Shuttling Activity of HBV Core Protein. In: Guo, H., Cuconati, A. (eds) Hepatitis B Virus. Methods in Molecular Biology, vol 1540. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6700-1_5

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  • DOI: https://doi.org/10.1007/978-1-4939-6700-1_5

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  • Publisher Name: Humana Press, New York, NY

  • Print ISBN: 978-1-4939-6698-1

  • Online ISBN: 978-1-4939-6700-1

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