Functional Insights into ANP32A-Dependent Influenza A Virus Polymerase Host Restriction.

Functional Insights into ANP32A-Dependent Influenza A Virus Polymerase Host Restriction.
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DOI:
10.1016/j.celrep.2017.08.061
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发表时间:
2017-09-12
期刊:
影响因子:
8.8
通讯作者:
Hale BG
Hale BG
中科院分区:
生物学1区
文献类型:
--
作者:
Domingues P;Hale BG

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甲型流感病毒的宿主限制限制了大流行的出现。病毒RNA聚合酶(vPol)是一种必需的酶,必须适应禽流感病毒在人类中复制。宿主ANP 32A的物种差异决定了适应:人ANP 32A缺乏存在于禽类ANP 32A中的未表征的33个氨基酸插入。在这里,我们揭示了宿主SUMO化对vPol活性的重要贡献,包括avANP 32A功能。我们还鉴定了avANP 32A特有的疏水性SUMO相互作用基序(SIM)样序列,其关键支持禽类特征vPol。当引入huANP 32A中时,不相关的SIM序列部分地概括了该功能。通过研究ANP 32A-vPol相互作用,我们发现huANP 32A与人和禽类特征vPol的相互作用较弱,而avANP 32A的疏水基序促进了更强的相互作用。此外,我们确定了avANP 32A中的一个高度酸性的片段,它构成了vPol相互作用的主要位点。我们的数据表明vPol适应宿主ANP 32A的补偿机制独立于物种特异性相互作用。宿主SUMO化有助于甲型流感病毒聚合酶(vPol)活性禽ANP 32A具有独特的疏水SUMO相互作用基序样序列禽ANP 32A疏水基序增强vPol相互作用以克服限制性ANP 32A和vPol之间的相互作用不依赖于PB 2 -627同一性细胞中的物种差异决定甲型流感病毒聚合酶宿主限制性。Domingues和黑尔描述了宿主SUMO化对病毒聚合酶活性的贡献,并鉴定了禽ANP 32 A特有的SUMO相互作用基序样序列,其促进与病毒聚合酶的相互作用,并且对于确定宿主范围至关重要。
Host restriction of influenza A virus limits pandemic emergence. The viral RNA polymerase (vPol) is an essential enzyme that must adapt for avian viruses to replicate in humans. Species differences in host ANP32A dictate adaptation: human ANP32A lacks an uncharacterized 33 amino-acid insertion that is present in avian ANP32A. Here, we uncover important contributions of host SUMOylation to vPol activity, including avANP32A function. We also identify a hydrophobic SUMO interaction motif (SIM)-like sequence unique to avANP32A that critically supports avian-signature vPol. Unrelated SIM sequences partially recapitulate this function when introduced into huANP32A. By investigating ANP32A-vPol interactions, we find that huANP32A interacts weakly with both human- and avian-signature vPols, while the hydrophobic motif of avANP32A promotes stronger interactions. Furthermore, we identify a highly acidic stretch in avANP32A that constitutes a major site of vPol interaction. Our data suggest compensatory mechanisms underlying vPol adaptation to host ANP32A independent of species-specific interactions. Host SUMOylation contributes to influenza A virus polymerase (vPol) activity Avian ANP32A harbors a unique hydrophobic SUMO interaction motif-like sequence Avian ANP32A hydrophobic motif enhances vPol interaction to overcome restriction Interactions between ANP32A and vPol are independent of PB2-627 identity Species differences in cellular ANP32A dictate influenza A virus polymerase host restriction. Domingues and Hale describe the contribution of host SUMOylation to viral polymerase activity and identify a SUMO interaction motif-like sequence unique to avian ANP32A that promotes interaction with the viral polymerase and is critical for determining host range.
对 RNA 病毒的先天免疫受 RIG-I 和 MDA5 的暂时且可逆的 sumoylation 调节
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