BST-2 mediated restriction of simian-human immunodeficiency virus.

BST-2 mediated restriction of simian-human immunodeficiency virus.
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DOI:
10.1016/j.virol.2010.07.021
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发表时间:
2010-10-25
期刊:
影响因子:
3.7
通讯作者:
Stephens EB
Stephens EB
中科院分区:
医学3区
文献类型:
--
作者:
Ruiz A;Lau D;Mitchell RS;Hill MS;Schmitt K;Guatelli JC;Stephens EB

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致病性猴-人免疫缺陷病毒(SHIV)含有HIV-1 Vpu和SIV Nef,两者均显示以物种特异性方式抵消BST-2(HM 1.24; CD 317; tetherin)对病毒释放的抑制。我们表明,人类和猪尾BST-2(ptBST-2)限制SHIV。我们发现猪尾BST-2(ptBST-2)蛋白的跨膜结构域(TMD)的连续“人源化”导致对HIV-1 Vpu的敏感性波动。我们的研究结果还表明,TMD在人类和ptBST-2蛋白的长度是重要的BST-2限制和敏感性的Vpu。两者合计,我们的研究结果强调了BST-2拮抗作用中三级结构的重要性,并表明HIV-1 Vpu跨膜结构域可能具有与BST-2拮抗作用无关的体内其他功能。
Pathogenic simian-human immunodeficiency viruses (SHIV)contain HIV-1 Vpu and SIV Nef, both shown to counteract BST-2 (HM1.24; CD317; tetherin) inhibition of virus release in a species-specific manner. We show that human and pig-tailed BST-2 (ptBST-2) restrict SHIV. We found that sequential “humanize” of the transmembrane domain (TMD) of the pig-tailed BST-2 (ptBST-2) protein resulted in a fluctuation in sensitivity to HIV-1 Vpu. Our results also show that the length of the TMD in human and ptBST-2 proteins is important for BST-2 restriction and susceptibility to Vpu. Taken together, our results emphasize the importance of tertiary structure in BST-2 antagonism and suggests that the HIV-1 Vpu transmembrane domain may have additional functions in vivo unrelated to BST-2 antagonism.
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