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arXiv 0901.2293q-bio.BMcond-mat.soft
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病毒衣壳中多聚体的结控制喷射

Knot-controlled ejection of a polymer from a virus capsid

R Matthews, A. A. Louis, J. M. Yeomans

摘要:

我们提出了一个数值研究打结的影响,灵活和半灵活的聚合物从一个球形的,病毒样衣壳弹射。聚合物喷射速率主要由结控制,其移动到衣壳中的孔,然后充当棘轮。具有更复杂结的聚合物喷射更慢,并且对于大结,结类型而不是聚合物的柔性决定喷射速率。我们讨论了我们的研究结果的关系,从病毒衣壳的DNA弹射和推测,这一过程具有解开DNA进入细胞之前的生物学优势。

英文摘要:

We present a numerical study of the effect of knotting on the ejection of flexible and semiflexible polymers from a spherical, virus-like capsid. The polymer ejection rate is primarily controlled by the knot, which moves to the hole in the capsid and then acts as a ratchet. Polymers with more complex knots eject more slowly and, for large knots, the knot type, and not the flexibility of the polymer, determines the rate of ejection. We discuss the relation of our results to the ejection of DNA from viral capsids and conjecture that this process has the biological advantage of unknotting the DNA before it enters a cell.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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