- Non-chromatographic Method for the Hepatitis B Virus X Protein Using Elastin-Like Polypeptide Fusion Protein
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Soon-Hwan Kwon, Hyeseong Cho
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Osong Public Health Res Perspect. 2012;3(2):79-84. Published online June 30, 2012
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DOI: https://doi.org/10.1016/j.phrp.2012.04.003
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 Abstract
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- Objectives
Hepatitis B virus (HBV) is a member of the hepadnavirus family. The HBV genome contains four genes designated as S, C, P, and X. The HBV X (HBx) gene encodes for a 16.5-kDa regulatory protein that enhances HBV replication and exerts multifunctional activities. The aim of this study is to describe the rapid and easy purification of HBx using ELP (elastin-like polypeptide) fusion protein.
Methods
The ELP–HBx fusion protein was overexpressed in Escherichia coli. Environmental sensitivity was demonstrated via turbidity and dynamic light scattering as a function of temperature. HBx was purified as an ELP fusion protein. ELPs are biopolymers of the pentapeptide repeat Val-Pro-Gly-Xaa-Gly that undergo an inverse temperature phase transition. ELP follows in temperature and salt consistency, precipitation, and solution repetition (inverse transition cycling) with polypeptide, where it purifies the protein in a simple manner.
Results
Fusion proteins underwent supramolecular aggregation at 40 ℃ in 1 M NaCl and slowly resolubilized at subphysiologic temperatures. ELP domain proteolysis liberated a peptide of comparable size and immunoreactivity to the commercial HBx.
Conclusion
This study suggests that HBx can be purified rapidly and easily using inverse transition cycling, and that this method can be applied in determination of HBx 3D structures and HBx stability study.
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Citations
Citations to this article as recorded by  - Evaluation of machine learning algorithms to predict the hydrodynamic radii and transition temperatures of chemo-biologically synthesized copolymers
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Jing-hui Tian, Wen-dong Liu, Zhi-yong Zhang, Li-hua Tang, Dong Li, Zhao-ju Tian, Shao-wei Lin, Ying-jie Li
Journal of Viral Hepatitis.2019; 26(4): 496. CrossRef - Elastin-like polypeptides: A strategic fusion partner for biologics
Agnes Yeboah, Rick I. Cohen, Charles Rabolli, Martin L. Yarmush, Francois Berthiaume
Biotechnology and Bioengineering.2016; 113(8): 1617. CrossRef - Elastin-like polypeptides as a promising family of genetically-engineered protein based polymers
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World Journal of Microbiology and Biotechnology.2014; 30(8): 2141. CrossRef
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