Quantitative analysis of the interaction between the envelope protein domains and the core protein of human hepatitis B virus

Kyoung J. Choi, Chun W. Lim, Moon Young Yoon, Byung-Yoon Ahn, Yeon Gyu Yu

Research output: Contribution to journalArticle

8 Citations (Scopus)


Interaction between preformed nucleocapsids and viral envelope proteins is critical for the assembly of virus particles in infected cells. The pre-S1 and pre-S2 and cytosolic regions of the human hepatitis B virus envelope protein had been implicated in the interaction with the core protein of nucleocapsids. The binding affinities of specific subdomains of the envelope protein to the core protein were quantitatively measured by both ELISA and BIAcore assay. While a marginal binding was detected with the pre-S1 or pre-S2, the core protein showed high affinities to pre-S with apparent dissociation constants (K Dapp) of 7.3±0.9 and 8.2±0.4μM by ELISA and BIAcore assay, respectively. The circular dichroism analysis suggested that conformational change occurs in pre-S through interaction with core protein. These results substantiate the importance of specific envelope domains in virion assembly, and demonstrate that the interaction between viral proteins can be quantitatively measured in vitro.

Original languageEnglish
Pages (from-to)959-966
Number of pages8
JournalBiochemical and Biophysical Research Communications
Issue number3
Publication statusPublished - 2004 Jul 2



  • Core protein
  • Hepatitis B virus
  • Interaction
  • Pre-S domains
  • Surface protein

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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