Ab initio phase determination for spherical viruses: parameter determination for spherical-shell models.

Ab initio phase determination for spherical viruses: parameter determination for spherical-shell models.
复制标题

球形病毒的从头相确定:球壳模型的参数确定。

DOI:
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发表时间:
1992
期刊:
Acta Crystallographica Section A Foundations of Crystallography
影响因子:
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通讯作者:
M. Rossmann
M. Rossmann
中科院分区:
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文献类型:
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作者:
M. S. Chapman;J. Tsao;M. Rossmann

文献摘要

被引文献

相似文献

犬细小病毒的结构测定取决于最初从球壳模型计算的相的延伸[Tsao,Chapman,Wu,Agbandje,Keller & Rossmann(1992). Acta Cryst.B48,75-88]。这种从头定相有望避免通过同晶或分子置换进行初始实验定相,从而加快球形病毒衣壳的结构测定。在本文中,它示出了如何参数,如半径,DNA密度和粒子的位置可以确定和细化衍射数据具有足够的精度,开始从20 A分辨率的病毒约122 A半径的相位扩展。
The structure determination of canine parvovirus depended on the extension of phases calculated initially from a spherical-shell model [Tsao, Chapman, Wu, Agbandje, Keller & Rossmann (1992). Acta Cryst. B48, 75-88]. Such ab initio phasing holds the promise of obviating initial experimental phasing by isomorphous or molecular replacement, thereby expediting the structure determinations of spherical virus capsids. In this paper, it is shown how parameters such as radii, DNA density and particle positions may be determined and refined from diffraction data with sufficient precision to start phase extension from 20 A resolution for a virus of approximately 122 A radius.