Cryo-EM model of the bullet-shaped vesicular stomatitis virus.
Cryo-EM model of the bullet-shaped vesicular stomatitis virus.
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DOI:
10.1126/science.1181766
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发表时间:
2010-02-05
期刊:
影响因子:
--
通讯作者:
Zhou ZH
中科院分区:
文献类型:
--
作者:
Ge P;Tsao J;Schein S;Green TJ;Luo M;Zhou ZH
Vesicular stomatitis virus (VSV) is a bullet-shaped rhabdovirus and a model system of negative-strand RNA viruses. Based on direct visualization by cryo-electron microscopy, we show that each virion contains two nested, left-handed helices, an outer helix of matrix protein M and an inner helix of nucleoprotein N and RNA. M has a hub domain with four contact sites that link to neighboring M and N subunits, providing rigidity by clamping adjacent turns of the nucleocapsid. Side-by-side interactions between neighboring N subunits are critical for the nucleocapsid to form a bullet shape, and structure-based mutagenesis results support this description. Together, our data suggest a mechanism of VSV assembly in which the nucleocapsid spirals from the tip to become the helical trunk, both subsequently framed and rigidified by the M layer.
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