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首页> 外文期刊>Annales Henri Poincare >Polymer Transport in Random Potentials and the Genetic Code: The Waltz of Life
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Polymer Transport in Random Potentials and the Genetic Code: The Waltz of Life

机译:聚合物在随机势中的传输和遗传密码:生命的华尔兹

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We address the question of why the translation From nucleic acids to pro-tein forming amino acids is carried out by triplets known as radons. We approach this problem from a dynamical point of view by considering the translation properties of primitive molecular machines operating under prebiotic conditions [1, 2, 3, 4]. Our model captures some basic riboaome-mRNA interaction features. We consider short chains of charged particles interacting with polymers via elec-trostatic forces, constrained to move in quasi one dimensional geometries, subject to external forcing. Our numerical and analytic studies of statistical properties of random chain/polymer potentials suggest that, under very general conditions, a dynamics is attained in which the chain moves along the polymer in steps of three monomers, traversing swiftly two monomers and lingering on the third one as in a waltz. This behavior is enhanced when we consider present day protein coding sequences, We also comment on noncoding sequences. We argue that this property could be one of the underlying causes for the three base codon structure of the genetic code.
机译:我们解决了为什么从核酸到蛋白质形成氨基酸的翻译是通过称为lets的三联体进行的问题。我们从动力学的角度通过考虑在益生元条件下运行的原始分子机器的翻译特性来解决此问题[1、2、3、4]。我们的模型捕获了一些基本的核糖体-mRNA相互作用特征。我们认为带电粒子的短链通过静电力与聚合物相互作用,受制于外力作用,其被约束以准一维几何形状运动。我们对无规链/聚合物电势的统计性质进行的数值和分析研究表明,在非常普遍的条件下,可获得一种动力学,其中链以三种单体的形式沿着聚合物运动,迅速穿过两种单体,并在第三种上徘徊如华尔兹。当我们考虑当今的蛋白质编码序列时,这种行为得到了增强。我们还评论了非编码序列。我们认为该特性可能是遗传密码的三个碱基密码子结构的根本原因之一。

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