Differential assembly of Hepatitis B Virus core protein on single- and double-stranded nucleic acid suggest the dsDNA-filled core is spring-loaded.

Differential assembly of Hepatitis B Virus core protein on single- and double-stranded nucleic acid suggest the dsDNA-filled core is spring-loaded.
复制标题

DOI:
10.1016/j.virol.2012.04.012
复制
发表时间:
2012-08-15
期刊:
影响因子:
3.7
通讯作者:
Zlotnick A
Zlotnick A
中科院分区:
医学3区
文献类型:
--
作者:
Dhason MS;Wang JC;Hagan MF;Zlotnick A

文献摘要

参考文献

被引文献

相似文献

乙型肝炎病毒 (HBV) 核心在病毒 RNA 上组装,病毒 RNA 在核心内逆转录为成熟 HBV 的部分 dsDNA 基因组。然而,将 dsDNA(一种刚性聚合物)限制在核心内必然需要比限制 ssRNA 更高的衣壳稳定性。我们假设,与 ssRNA 不同,dsDNA 不适合组装。我们通过 EMSA、EM、DLS 和乙烯 DNA 荧光检查了纯化的 HBV 核心蛋白 Cp183 对 ssDNA 和 dsDNA 的滴定。 Cp183以高亲和力结合ssDNA,形成病毒样衣壳。然而,Cp183 与 dsDNA 的结合较差,形成不规则复合物的混合物。尽管如此,我们在双链DNA组装反应中观察到了一些正常的核心,这表明弯曲DNA所需的能量可能与蛋白质-蛋白质结合能相似。这种能量的相似性表明,dsDNA 对成熟的 HBV 核心施加压力,这与计算结果一致,这可能是病毒成熟信号和 DNA 释放的基础。
Hepatitis B Virus (HBV) cores assemble on viral RNA, which is reverse transcribed within the core to the partially dsDNA genome of mature HBV. However, constraining dsDNA, a stiff polymer, within a core necessarily requires far greater capsid stability than constraining ssRNA. We hypothesized that, unlike ssRNA, dsDNA would be a poor substrate for assembly. We examined titrations of ssDNA and dsDNA with purified HBV core protein, Cp183, by EMSA, EM, DLS, and etheno-DNA fluorescence. Cp183 bound ssDNA with high affinity to form virus-like capsids. However, Cp183 bound dsDNA poorly, forming a mixture of irregular complexes. Nonetheless, we observed some normal cores in dsDNA assembly reactions, indicating that the energy required to bend DNA could be similar to the protein–protein association energy. This similarity of energies suggests that dsDNA stresses mature HBV cores, in agreement with calculation, which may be the basis for the virus maturation signal and DNA release.
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: 10.1006/smvy.1994.1003
发表时间: 1994-02-01
期刊: SEMINARS IN VIROLOGY
影响因子: --
作者:
HENDRIX, RW;GARCEA, RL
通讯作者: GARCEA, RL
DOI: 10.1021/cb100275b
发表时间: 2010-12-17
影响因子: 4
作者:
Katen, Sarah P.;Chirapu, Srinivas Reddy;Finn, M. G.;Zlotnick, Adam
通讯作者: Zlotnick, Adam
DOI: 10.1073/pnas.1233721100
发表时间: 2003-08-05
影响因子: 11.1
作者:
Evilevitch, A;Lavelle, L;Gelbart, WM
通讯作者: Gelbart, WM
DOI: 10.1016/j.jmb.2007.10.044
发表时间: 2008-01-11
影响因子: 5.6
作者:
Hilmer, Jonathan K.;Zlotnick, Adam;Bothner, Brian
通讯作者: Bothner, Brian