An inhibitory activity in human cells restricts the function of an avian-like influenza virus polymerase.

An inhibitory activity in human cells restricts the function of an avian-like influenza virus polymerase.
复制标题

DOI:
10.1016/j.chom.2008.06.007
复制
发表时间:
2008-08-14
影响因子:
30.3
通讯作者:
Doudna JA
Doudna JA
中科院分区:
医学1区
文献类型:
--
作者:
Mehle A;Doudna JA

文献摘要

参考文献

被引文献

相似文献

高致病性禽流感跨物种传播到人群可导致致命感染,并增加大流行爆发的可能性。种嗜性的主要决定因素是流感聚合酶亚基PB2。我们在这里表明,在人类细胞中的显性抑制活性有效地和选择性地限制了聚合酶的功能,该聚合酶含有在残基627处具有谷氨酸的禽类样PB2。这种抑制活性显著降低了含有PB2 K627 E的聚合酶的病毒产生,而不降低其相对感染性。限制性聚合酶不能组装成核糖核蛋白复合物,导致基因组转录、复制和病毒产生减少。然而,无论是野生型和突变型PB2结合病毒核蛋白单独表达时,表明物种特异性的构象变化内的聚合酶三聚体破坏核糖核蛋白的装配。了解流感病毒宿主细胞特异性和发病机制的分子基础,将使合理的战略,以治疗和预防未来的禽流感在人类中爆发。
Transmission of highly pathogenic avian influenza across species into human populations can result in lethal infections and increases the potential of a pandemic outbreak. A major determinant of species tropism is the influenza polymerase subunit PB2. We show here that a dominant inhibitory activity in human cells potently and selectively restricts the function of polymerase containing an avian-like PB2 with glutamic acid at residue 627. This inhibitory activity dramatically reduces virus production by polymerases containing PB2 K627E without reducing their relative infectivity. Restricted polymerases fail to assemble into ribonucleoprotein complexes, resulting in decreased genome transcription, replication, and virus production. However, both wild-type and mutant PB2 bind to viral nucleoprotein when expressed alone, suggesting that species-specific conformational alterations within the polymerase trimer disrupt ribonucleoprotein assembly. Understanding the molecular basis for influenza virus host cell specificity and pathogenesis will enable rational strategies to treat and prevent future avian influenza outbreaks in humans.
DOI: 10.1128/jvi.16.6.1435-1443.1975
发表时间: 1975-01-01
影响因子: 5.4
作者:
GLASS, SE;MCGEOCH, D;BARRY, RD
通讯作者: BARRY, RD
DOI: 10.1128/jvi.78.17.9144-9153.2004
发表时间: 2004-09-01
影响因子: 5.4
作者:
Fodor, E;Smith, M
通讯作者: Smith, M
DOI: 10.1038/270617a0
发表时间: 1977-01-01
期刊: NATURE
影响因子: 64.8
作者:
ALMOND, JW
通讯作者: ALMOND, JW
DOI: 10.1128/jvi.00110-06
发表时间: 2006-06-01
影响因子: 5.4
作者:
Chen, HL;Li, YB;Kawaoka, Y
通讯作者: Kawaoka, Y
DOI: 10.1073/pnas.0507415102
发表时间: 2005-12-20
影响因子: 11.1
作者:
Gabriel, G;Dauber, B;Stech, J
通讯作者: Stech, J