A central region in the hepatitis C virus NS4A protein allows formation of an active NS3-NS4A serine proteinase complex in vivo and in vitro
نویسندگان
چکیده
منابع مشابه
The N-terminal region of hepatitis C virus nonstructural protein 3 (NS3) is essential for stable complex formation with NS4A.
Hepatitis C virus proteins are produced by proteolytic processing of the viral precursor polyprotein that is encoded in the largest open reading frame of the viral genome. Processing of the nonstructural viral polyprotein requires the viral serine-type proteinase present in nonstructural protein 3 (NS3). The cleavage of the junction between NS4B and NS5A is mediated by NS3 only when NS4A is pre...
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چکیده ندارد.
15 صفحه اولThe hepatitis C virus NS4A protein: interactions with the NS4B and NS5A proteins.
Hepatitis C virus encodes a large polyprotein precursor that is proteolytically processed into at least 10 distinct products, in the order NH2-C-E1-E2-p7-NS2-NS3-NS4A-NS4B-NS5A-NS5B -COOH. A serine proteinase encoded in the N-terminal 181 residues of the NS3 nonstructural protein is responsible for cleavage at four sites (3/4A, 4A/4B, 4B/5A, and 5A/5B) in the nonstructural region. NS4A, a 54-re...
متن کاملModulation of hepatitis C virus NS5A hyperphosphorylation by nonstructural proteins NS3, NS4A, and NS4B.
NS5A of the hepatitis C virus (HCV) is a highly phosphorylated protein involved in resistance against interferon and required most likely for replication of the viral genome. Phosphorylation of this protein is mediated by a cellular kinase(s) generating multiple proteins with different electrophoretic mobilities. In the case of the genotype 1b isolate HCV-J, in addition to the basal phosphoryla...
متن کاملDifferential requirements of NS4A for internal NS3 cleavage and polyprotein processing of hepatitis C virus.
The NS3 protein of hepatitis C virus (HCV) possesses protease activity responsible for the proteolytic cleavage of the viral polyprotein at the junctions of nonstructural proteins downstream of NS3. The NS3 protein was also found to be internally cleaved. In this study, we demonstrated that internal cleavages occurred on the NS3 protein of genotype 1b in the presence of NS4A, both in culture ce...
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ژورنال
عنوان ژورنال: Journal of Virology
سال: 1995
ISSN: 0022-538X,1098-5514
DOI: 10.1128/jvi.69.7.4373-4380.1995