The hepatitis B virus core protein intradimer interface modulates capsid assembly and stability.

The hepatitis B virus core protein intradimer interface modulates capsid assembly and stability.
复制标题

肝炎病毒核心蛋白质内二聚体界面调节衣壳组件和稳定性。

DOI:
10.1021/bi500732b
复制
发表时间:
2014-09-02
期刊:
影响因子:
2.9
通讯作者:
Zlotnick, Adam
Zlotnick, Adam
中科院分区:
生物学3区
文献类型:
--
作者:
Selzer, Lisa;Katen, Sarah P.;Zlotnick, Adam

文献摘要

参考文献

被引文献

相似文献

在B型肝炎病毒(HBV)的生命周期中,衣壳的组装和拆卸必须确保病毒基因组的正确包装和释放。在这里,我们表明,核心蛋白的动态变化在调节这些过程中发挥了重要作用。HBV衣壳由120个拷贝的核心蛋白同源二聚体组装而成。每个单体在61位含有保守的半胱氨酸,可以形成二聚体内二硫键,我们将其用作二聚体构象状态的标记。我们发现,在衣壳的背景下,二聚体形成内二硫化物相对较快。令人惊讶的是,与还原的二聚体相比,完全氧化的二聚体组装较慢,并形成形态相似但不太稳定的衣壳。我们假设氧化蛋白采用不利于衣壳组装的几何形状(或几何形状的星座),导致较弱的二聚体-二聚体相互作用以及较慢的组装动力学。我们的研究结果表明,在核心蛋白intradimer接口的结构灵活性是必不可少的调节衣壳组装和稳定性。我们进一步表明,由C61-C61二硫键的衣壳不稳定具有调节功能,以支持衣壳解体和病毒基因组的释放。
During the hepatitis B virus (HBV) life cycle, capsid assembly and disassembly must ensure correct packaging and release of the viral genome. Here we show that changes in the dynamics of the core protein play an important role in regulating these processes. The HBV capsid assembles from 120 copies of the core protein homodimer. Each monomer contains a conserved cysteine at position 61 that can form an intradimer disulfide that we use as a marker for dimer conformational states. We show that dimers in the context of capsids form intradimer disulfides relatively rapidly. Surprisingly, compared to reduced dimers, fully oxidized dimers assembled slower and into capsids that were morphologically similar but less stable. We hypothesize that oxidized protein adopts a geometry (or constellation of geometries) that is unfavorable for capsid assembly, resulting in weaker dimer–dimer interactions as well as slower assembly kinetics. Our results suggest that structural flexibility at the core protein intradimer interface is essential for regulating capsid assembly and stability. We further suggest that capsid destabilization by the C61–C61 disulfide has a regulatory function to support capsid disassembly and release of the viral genome.
DOI: 10.1099/0022-1317-80-10-2647
发表时间: 1999-10-01
影响因子: 3.8
作者:
Hui, EKW;Yi, YS;Lo, SCJ
通讯作者: Lo, SCJ
DOI: 10.1007/bf02821544
发表时间: 1997-02-01
影响因子: 2.6
作者:
Darby, N;Creighton, TE
通讯作者: Creighton, TE
DOI: 10.1021/bi0261645
发表时间: 2002-10-01
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Ceres, P;Zlotnick, A
通讯作者: Zlotnick, A
DOI: 10.1016/s0006-3495(80)84929-0
发表时间: 1980-01-01
影响因子: 3.4
作者:
CASPAR, DLD
通讯作者: CASPAR, DLD
DOI: 10.1042/bj0420628
发表时间: 1948-01-01
影响因子: 4.1
作者:
DIRNHUBER, P;SCHUTZ, F
通讯作者: SCHUTZ, F