Encapsulation of a polymer by an icosahedral virus.

Encapsulation of a polymer by an icosahedral virus.
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DOI:
10.1088/1478-3975/7/4/045003
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发表时间:
2010-12-09
期刊:
影响因子:
2
通讯作者:
Hagan MF
Hagan MF
中科院分区:
生物学4区
文献类型:
--
作者:
Elrad OM;Hagan MF

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The coat proteins of many viruses spontaneously form icosahedral capsids around nucleic acids or other polymers. Elucidating the role of the packaged polymer in capsid formation could promote biomedical efforts to block viral replication and enable use of capsids in nanomaterials applications. To this end, we perform Brownian dynamics on a coarse-grained model that describes the dynamics of icosahedral capsid assembly around a flexible polymer. We identify several mechanisms by which the polymer plays an active role in its encapsulation, including cooperative polymer-protein motions. These mechanisms are related to experimentally controllable parameters such as polymer length, protein concentration, and solution conditions. Furthermore, the simulations demonstrate that assembly mechanisms are correlated to encapsulation efficiency, and we present a phase diagram that predicts assembly outcomes as a function of experimental parameters. We anticipate that our simulation results will provide a framework for designing in vitro assembly experiments on single-stranded RNA virus capsids.
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