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The first hydrophobic domain of the hepatitis C virus E1 protein is important for interaction with the capsid protein

Institute of Medical Research¹ and Department of Medical Technology², Tzu Chi University, 701, Section 3, Chung-Yang Road, Hualien, Taiwan 970, Republic of China
Department of Medical Technology, Buddhist Tzu Chi General Hospital, Hualien, Taiwan, Republic of China³
Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China⁴

Author for correspondence: Shih-Yen Lo at Department of Medical Technology. Fax +886 3 8571917. e-mail losylo{at}mail.tcu.edu.tw

The interaction between the hepatitis C virus capsid protein and the envelope protein E1 has been demonstrated previously in vivo. To determine the binding region of the E1 protein with the capsid protein, this interaction was characterized in vitro. This study shows that the interaction between these proteins should occur in the endoplasmic reticulum membrane rather than in the cytosol and that the first hydrophobic domain of the E1 protein (aa 261–291) is important for the interaction with the capsid protein.

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