Betabaculovirus F proteins showed different efficiencies when rescuing the infectivity of gp64-null Autographa californica nucleopolyhedrovirus.

Betabaculovirus F proteins showed different efficiencies when rescuing the infectivity of gp64-null Autographa californica nucleopolyhedrovirus.
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β杆状病毒F蛋白在拯救gp64缺失的苜蓿银纹夜蛾核多角体病毒的感染性时表现出不同的效率。

DOI:
10.1016/j.virol.2012.10.017
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发表时间:
2013-02
期刊:
影响因子:
3.7
通讯作者:
Wang H
Wang H
中科院分区:
医学3区
文献类型:
--
作者:
Deng F;Vlak, Just M;Hu Z;Wang H

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小地老虎颗粒体病毒(AgseGV)F蛋白先前被鉴定为第一个与苜蓿银纹夜蛾核型多角体病毒(AcMNPV)GP 64具有功能同源性的β-杆状病毒F蛋白。在本研究中,研究了来自XecnGV、苹果蠹蛾颗粒体病毒(CpGV)、Phthorimaea operculella颗粒体病毒(PhopGV)、Choristoneura ocquientalis颗粒体病毒(ChocGV)和小菜蛾颗粒体病毒(PlxyGV)的F蛋白拯救gp 64-null AcMNPV的感染性的能力。我们的研究结果表明,大多数研究的betabaculovirus F蛋白可以取代AcMNPV GP 64的功能,但是,它们拯救gp 64缺失的AcMNPV的感染力的效率有很大差异。PlxyF,虽然融合,是唯一的蛋白质,未能取代AcMNPV GP 64的功能。利用Sf 90 p1 D细胞系的进一步研究表明,PlxyF似乎被正确地掺入AcMNPV病毒粒子中,并进行正确的翻译后切割和N-连接糖基化。然而,含有PlxyF的gp 64-null AcMNPV不能在Sf 9或小菜蛾细胞中繁殖。
The Agrotis segetum granulovirus (AgseGV) F protein was previously identified as the first betabaculovirus F protein with functional homology to Autographa californica nucleopolyhedrovirus (AcMNPV) GP64. In the current study, F proteins from Xestia c-nigrum granulovirus (XecnGV), Cydia pomonella granulovirus (CpGV), Phthorimaea operculella granulovirus (PhopGV), Choristoneura occidentalis granulovirus (ChocGV) and Plutella xylostella GV (PlxyGV) were studied for their ability to rescue the infectivity of gp64-null AcMNPV. Our results showed that most studied betabaculovirus F proteins could replace the function of AcMNPV GP64, however, their efficiencies to rescue the infectivity of gp64-null AcMNPV were substantially different. PlxyF, although fusogenic, was the only protein that failed to substitute the function of AcMNPV GP64. Further studies using Sf90p1Dcell line showed that PlxyF appeared to be properly incorporated into AcMNPV virions and underwent correct post-translational cleavage and N-linked glycosylation. However, the gp64-null AcMNPV containing PlxyF could not be propagated in either Sf9 or P. xylostella cells.
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