您当前的位置:首页 > 信息速递 > 学术活动

Potent neutralization of Hepatitis A virus reveals a receptor mimic mechanism

时间:2016-07-08 14:38:00作者:来源:



报告题目:Potent neutralization of Hepatitis A virus reveals a receptor mimic mechanism

人:王祥喜博士,中科院生物物理研究所,研究员

报告时间:2016年7月12日(星期二)上午10:30-11:15

报告地点:中一楼3113

摘 要:

Hepatitis A virus (HAV) infects ~1.4 million people annually and whilst there is a vaccine, there are no licensed therapeutic drugs. Hepatoviruses are unusual among picornaviruses, both in targeting the liver and also in their structure and life cycle. Here we show that nM concentrations of HAV-specific monoclonal antibody R10 neutralize virus infection efficiently. Cryo-EM structures of HAV full particles and empty particles at 3.4 Å and 3.8 Å resolution reveal a ‘layered’ RNA genome and altered inner capsid layer distinguishing the full and empty particles. The cryo-EM structure of full particles complexed with R10 Fab at 4.2 Å resolution, together with the crystal structure of R10 Fab allowed us to build a reliable model of the complex. R10 binds across the pentamer interface interfering with receptor attachment and viral uncoating, shedding light on the hitherto unknown mechanism by which this extraordinarily stable virus releases its RNA and demonstrating new opportunities for therapeutic intervention.

简 介:

王祥喜博士,男,中国科学院生物物理研究所,生物大分子国家重点实验室研究员。2009年在四川大学生物技术专业获得理学学士学位,2014年6月在中国科学院生物物理研究所获得理学博士学位。2014年7月在中国科学院生物物理研究所从事科研工作至今,主要运用蛋白质晶体学、低温冷冻电镜、病毒学、细胞生物学等技术方法,从事致病微生物相关重要蛋白和与人类重大疾病直接相关的病毒完整颗粒及病毒与受体、病毒与抗体的超大分子复合物的精细三维结构和相关功能研究,以及抗病毒药物研究。现主持国家973项目子课题一项,国家自然科学基金面上项目,十三五重大专项“艾滋病和病毒性肝炎等重大传染病防治”课题子任务“疫苗抗原结构研究”,获得中国科学院青年研究员人才项目资助(2014年),中国科协“青年人才托举工程”项目等。以第一作者或者通讯身份在Nature, Nature Structural & Molecular Biology, Nature Microbiology, Nature Communications, Plos Pathogen, Journal of Virology, Protein & Cell, Nucleic Acids Research等SCI杂志发表近20篇文章,申请发明专利2项,其中一项已授权。曾获得吴瑞奖学金、中科院百篇优秀博士论文、第四届贝时璋青年生物物理学家奖等,并多次受邀在国际和国内病毒学会议中作大会或分会报告。