Domain architecture and oligomerization properties of the paramyxovirus PIV 5 hemagglutinin-neuraminidase (HN) protein.
Domain architecture and oligomerization properties of the paramyxovirus PIV 5 hemagglutinin-neuraminidase (HN) protein.
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副粘病毒 PIV 5 血凝素神经氨酸酶 (HN) 蛋白的结构域结构和寡聚特性。
DOI:
10.1016/j.virol.2008.05.023
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发表时间:
2008
期刊:
影响因子:
3.7
通讯作者:
Jardetzky,TheodoreS
中科院分区:
文献类型:
--
作者:
Yuan,Ping;Leser,GeorgeP;Demeler,Borries;Lamb,RobertA;Jardetzky,TheodoreS
The mechanism by which the paramyxovirus hemagglutinin-neuraminidase (HN) protein couples receptor binding to activation of virus entry remains to be fully understood, but the HN stalk is thought to play an important role in the process. We have characterized ectodomain constructs of the parainfluenza virus 5 HN to understand better the underlying architecture and oligomerization properties that may influence HN functions. The PIV 5 neuraminidase (NA) domain is monomeric whereas the ectodomain forms a well-defined tetramer. The HN stalk also forms tetramers and higher order oligomers with high α-helical content. Together, the data indicate that the globular NA domains form weak intersubunit interactions at the end of the HN stalk tetramer, while stabilizing the stalk and overall oligomeric state of the ectodomain. Electron microscopy of the HN ectodomain reveals flexible arrangements of the NA and stalk domains, which may be important for understanding how these two HN domains impact virus entry.
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DOI:
10.1073/pnas.82.22.7520
发表时间:
1985
影响因子:
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作者:
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通讯作者:
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