全部版块 我的主页
论坛 经济学人 二区 外文文献专区
372 0
2022-03-03
摘要翻译:
利用详尽的Monte Carlo模拟,我们用晶格模型研究了纤维形成的动力学和机理,并将其作为温度和链数的函数。虽然这些模型充其量是肽的漫画,但我们表明,许多被认为控制纤维组装的通用特征存在于玩具模型中。该单体包含由三个字母(疏水性、极性和带电性)组成的八个珠子,在原生状态下采用紧凑的构象。纤维组装的动力学发生在三个不同的阶段。在每一个阶段,都有一连串的事件将单体和低聚物转变为有序结构。在第一个“爆发”阶段,形成不同大小的高流动性低聚物。向易聚集构象的转化发生在第二阶段的低聚物中。随着时间的推移,一个占主导地位的集群出现了,其中包含了大多数链。在最后阶段,易聚集的构象颗粒作为模板,较小的低聚物或单体可以停靠在上面,并转化为纤丝结构。Lifshitz-Slyazov生长动力学很好地描述了从超饱和溶液中结晶后阶段的总生长时间。
---
英文标题:
《Probing the Mechanisms of Fibril Formation Using Lattice Models》
---
作者:
Mai Suan Li, D. K. Klimov, J. E. Straub, and D. Thirumalai
---
最新提交年份:
2008
---
分类信息:

一级分类:Quantitative Biology        数量生物学
二级分类:Biomolecules        生物分子
分类描述:DNA, RNA, proteins, lipids, etc.; molecular structures and folding kinetics; molecular interactions; single-molecule manipulation.
DNA、RNA、蛋白质、脂类等;分子结构与折叠动力学;分子相互作用;单分子操作。
--
一级分类:Quantitative Biology        数量生物学
二级分类:Other Quantitative Biology        其他定量生物学
分类描述:Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
--

---
英文摘要:
  Using exhaustive Monte Carlo simulations we study the kinetics and mechanism of fibril formation using lattice models as a function of temperature and the number of chains. While these models are, at best, caricatures of peptides, we show that a number of generic features thought to govern fibril assembly are present in the toy model. The monomer, which contains eight beads made from three letters (hydrophobic, polar, and charged), adopts a compact conformation in the native state. The kinetics of fibril assembly occurs in three distinct stages. In each stage there is a cascade of events that transforms the monomers and oligomers to ordered structures. In the first "burst" stage highly mobile oligomers of varying sizes form. The conversion to the aggregation-prone conformation occurs within the oligomers during the second stage. As time progresses, a dominant cluster emerges that contains a majority of the chains. In the final stage, the aggregation-prone conformation particles serve as a template onto which smaller oligomers or monomers can dock and undergo conversion to fibril structures. The overall time for growth in the latter stages is well described by the Lifshitz-Slyazov growth kinetics for crystallization from super-saturated solutions.
---
PDF链接:
https://arxiv.org/pdf/0812.1274
二维码

扫码加我 拉你入群

请注明:姓名-公司-职位

以便审核进群资格,未注明则拒绝

相关推荐
栏目导航
热门文章
推荐文章

说点什么

分享

扫码加好友,拉您进群
各岗位、行业、专业交流群