Hepatitis C virus E2 envelope glycoprotein core structure.
Hepatitis C virus E2 envelope glycoprotein core structure.
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DOI:
10.1126/science.1243876
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发表时间:
2013-11-29
期刊:
影响因子:
--
通讯作者:
Law M
中科院分区:
文献类型:
--
作者:
Kong L;Giang E;Nieusma T;Kadam RU;Cogburn KE;Hua Y;Dai X;Stanfield RL;Burton DR;Ward AB;Wilson IA;Law M
Hepatitis C virus (HCV), a Hepacivirus, is a major cause of viral hepatitis, liver cirrhosis and hepatocellular carcinoma. HCV envelope glycoproteins E1 and E2 mediate fusion and entry into host cells and are the primary targets of the humoral immune response. The crystal structure of the E2 core bound to broadly neutralizing antibody AR3C at 2.65 Å reveals a compact architecture composed of a central Ig-fold β-sandwich flanked by two additional protein layers. The CD81 receptor-binding site was identified by EM and by site-directed mutagenesis and overlaps with the AR3C epitope. The x-ray and EM E2 structures differ markedly from predictions of an extended, three-domain, class II fusion protein fold and therefore provide invaluable information for HCV drug and vaccine design.
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