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arXiv 1608.03145physics.bio-phnlin.AOq-bio.BM
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蛋白质基因型-表型图谱的物理模型

Physical model of the genotype-to-phenotype map of proteins

Tsvi Tlusty, Albert Libchaber, Jean-Pierre Eckmann

摘要:

DNA如何映射到功能蛋白质是生命物质的一个基本问题。我们介绍和研究蛋白质进化的物理模型,这表明这张地图的机械基础。许多蛋白质依赖于大规模运动来发挥功能。因此,我们将蛋白质视为学习无定形物质,它朝着这样一种机械功能进化:基因是编码构成蛋白质的氨基酸网络连接的二元序列。该基因一直进化到网络在蛋白质上形成剪切带,这使得蛋白质功能所需的长距离软模式成为可能。进化将高维序列空间降低到机械模式的低维空间,与观察到的蛋白质基因型和表型之间的降维一致。$10^6$的解决方案的空间的频谱分析显示出强烈的对应关系的剪切带周围的机械模式和序列结构的本地化。具体来说,我们的模型显示了基因突变及其相关性如何发生在氨基酸上,这些氨基酸的相互作用决定了功能模式。

英文摘要:

How DNA is mapped to functional proteins is a basic question of living matter. We introduce and study a physical model of protein evolution which suggests a mechanical basis for this map. Many proteins rely on large-scale motion to function. We therefore treat protein as learning amorphous matter that evolves towards such a mechanical function: Genes are binary sequences that encode the connectivity of the amino acid network that makes a protein. The gene is evolved until the network forms a shear band across the protein, which allows for long-range, soft modes required for protein function. The evolution reduces the high-dimensional sequence space to a low-dimensional space of mechanical modes, in accord with the observed dimensional reduction between genotype and phenotype of proteins. Spectral analysis of the space of $10^6$ solutions shows a strong correspondence between localization around the shear band of both mechanical modes and the sequence structure. Specifically, our model shows how mutations of the gene and their correlations occur at amino acids whose interactions determine the functional mode.

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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