Molecular Changes in Dengue Envelope Protein Domain III upon Interaction with Glycosaminoglycans.

Molecular Changes in Dengue Envelope Protein Domain III upon Interaction with Glycosaminoglycans.
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DOI:
10.3390/pathogens9110935
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发表时间:
2020-11-11
期刊:
Pathogens (Basel, Switzerland)
影响因子:
--
通讯作者:
Winter A
Winter A
中科院分区:
其他
文献类型:
--
作者:
Hyatt JG;Prévost S;Devos JM;Mycroft-West CJ;Skidmore MA;Winter A

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登革热是一种迅速出现的病媒传播病毒性疾病,每年约有3.9亿新发感染,造成的全球负担日益加重。登革热病毒(DENV)是一种由伊蚊属雌蚊传播的黄病毒,但在分子水平上对病毒内吞作用的机制知之甚少,这阻碍了有效传播阻断疫苗(tbv)的开发。最近,糖胺聚糖(GAGs)通过与病毒包膜蛋白(EDIII)的第三结构域相互作用,在病毒最初的附着过程中发挥作用。在这里,我们报告了一项系统的研究,调查了一系列生物学相关的gag对重组产生的EDIII的结构和低聚状态的影响。我们提供了新的原位生物物理证据,证明肝素和硫酸软骨素C在二级结构水平上诱导EDIII的构象变化。此外,我们报道了硫酸软骨素C结合EDIII并在三级和四级结构水平上诱导高阶动态分子变化的能力,这些变化依赖于pH, GAG物种和GAG硫酸状态。最后,我们对小角中子散射(SANS)数据进行从头算建模,以可视化EDIII与硫酸软骨素C相互作用引起的诱导寡聚态,这可能有助于TBV的发展。
Dengue fever is a rapidly emerging vector-borne viral disease with a growing global burden of approximately 390 million new infections per annum. The Dengue virus (DENV) is a flavivirus spread by female mosquitos of the aedes genus, but the mechanism of viral endocytosis is poorly understood at a molecular level, preventing the development of effective transmission blocking vaccines (TBVs). Recently, glycosaminoglycans (GAGs) have been identified as playing a role during initial viral attachment through interaction with the third domain of the viral envelope protein (EDIII). Here, we report a systematic study investigating the effect of a range of biologically relevant GAGs on the structure and oligomeric state of recombinantly generated EDIII. We provide novel in situ biophysical evidence that heparin and chondroitin sulphate C induce conformational changes in EDIII at the secondary structure level. Furthermore, we report the ability of chondroitin sulphate C to bind EDIII and induce higher-order dynamic molecular changes at the tertiary and quaternary structure levels which are dependent on pH, GAG species, and the GAG sulphation state. Lastly, we conducted ab initio modelling of Small Angle Neutron Scattering (SANS) data to visualise the induced oligomeric state of EDIII caused by interaction with chondroitin sulphate C, which may aid in TBV development.
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影响因子: 8.4
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影响因子: 2.2
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