Central ions and lateral asparagine/glutamine zippers stabilize the post-fusion hairpin conformation of the SARS coronavirus spike glycoprotein.

Central ions and lateral asparagine/glutamine zippers stabilize the post-fusion hairpin conformation of the SARS coronavirus spike glycoprotein.
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DOI:
10.1016/j.virol.2005.02.022
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发表时间:
2005-05-10
期刊:
影响因子:
3.7
通讯作者:
Bosch BJ
Bosch BJ
中科院分区:
医学3区
文献类型:
--
作者:
Duquerroy S;Vigouroux A;Rottier PJ;Rey FA;Bosch BJ

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冠状病毒刺突糖蛋白是一类膜融合蛋白,其胞外结构域有两个特征七肽重复区(HR1和HR2)。在这里,我们报告了先前表征的严重急性呼吸综合征冠状病毒刺突蛋白HR1/HR2复合体的x射线结构。正如预期的那样,HR1和HR2片段在棒状分子中以反平行的方向组织。HR1螺旋形成一个超长(120 Å)的内部线圈,通过疏水和极性相互作用稳定。HR1的保守天冬酰胺和谷氨酰胺残基的惊人排列从两个中心氯离子传播,提供氢键“拉链”,强烈限制HR2主链的路径,迫使其在短HR2 α-螺旋的两端采用延长的构象。
The coronavirus spike glycoprotein is a class I membrane fusion protein with two characteristic heptad repeat regions (HR1 and HR2) in its ectodomain. Here, we report the X-ray structure of a previously characterized HR1/HR2 complex of the severe acute respiratory syndrome coronavirus spike protein. As expected, the HR1 and HR2 segments are organized in antiparallel orientations within a rod-like molecule. The HR1 helices form an exceptionally long (120 Å) internal coiled coil stabilized by hydrophobic and polar interactions. A striking arrangement of conserved asparagine and glutamine residues of HR1 propagates from two central chloride ions, providing hydrogen-bonding “zippers” that strongly constrain the path of the HR2 main chain, forcing it to adopt an extended conformation at either end of a short HR2 α-helix.
DOI: 10.1074/jbc.m400759200
发表时间: 2004-05-14
期刊: The Journal of biological chemistry
影响因子: --
作者:
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期刊: MOLECULAR CELL
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