Interactions between M protein and other structural proteins of severe, acute respiratory syndrome-associated coronavirus.

Interactions between M protein and other structural proteins of severe, acute respiratory syndrome-associated coronavirus.
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M蛋白与严重急性呼吸综合征相关的冠状病毒的其他结构蛋白之间的相互作用。

DOI:
10.1007/s11373-008-9278-3
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发表时间:
2008-11
影响因子:
11
通讯作者:
Lo SY
Lo SY
中科院分区:
医学1区
文献类型:
--
作者:
Hsieh YC;Li HC;Chen SC;Lo SY

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严重急性呼吸综合征相关冠状病毒 (SARS-CoV) 结构蛋白(S、E、M 和 NC)单独表达时位于不同的亚细胞位置。然而,当在细胞中共表达时,SARS-CoV M 蛋白几乎完全与 S、E 或 NC 蛋白共定位。另一方面,当S和E、S和NC、或E和NC在细胞中共表达时,仅观察到部分共定位。通过免疫共沉淀实验进一步证明了 SARS-CoV M 与其他结构蛋白之间的相互作用,但未证明 S 与 E、S 与 NC 或 E 与 NC 之间的相互作用。这些结果表明,SARS-CoV M蛋白与其他冠状病毒的M蛋白类似,在病毒组装中发挥着关键作用。 SARS-CoV M 蛋白的胞质 C 端结构域负责与 NC 蛋白结合。 M 蛋白的多个区域与 E 和 S 蛋白相互作用。提出了 SARS-CoV M 蛋白与其他结构蛋白之间相互作用的模型。这项研究有助于我们更好地了解 SARS-CoV 病毒组装过程中蛋白质与蛋白质的相互作用。本文的在线版本 (doi:10.1007/s11373-008-9278-3) 包含补充材料,可供授权用户使用。
Severe acute respiratory syndrome-associated coronavirus (SARS-CoV) structural proteins (S, E, M, and NC) localize in different subcellular positions when expressed individually. However, SARS-CoV M protein is co-localized almost entirely with S, E, or NC protein when co-expressed in the cells. On the other hand, only partial co-localization was observed when S and E, S and NC, or E and NC were co-expressed in the cells. Interactions between SARS-CoV M and other structural proteins but not interactions between S and E, S and NC, or E and NC were further demonstrated by co-immunoprecipitation assay. These results indicate that SARS-CoV M protein, similar to the M proteins of other coronaviruses, plays a pivotal role in virus assembly. The cytoplasmic C-terminus domain of SARS-CoV M protein was responsible for binding to NC protein. Multiple regions of M protein interacted with E and S proteins. A model for the interactions between SARS-CoV M protein and other structural proteins is proposed. This study helps us better understand protein-protein interactions during viral assembly of SARS-CoV. The online version of this article (doi:10.1007/s11373-008-9278-3) contains supplementary material, which is available to authorized users.
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