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arXiv 2008.11602q-bio.PE
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关于蛋白质空间的浩瀚

About the Protein Space Vastness

Jorge A. Vila

摘要:

根据控制蛋白质空间大小的因素,准确估计蛋白质空间大小是一个长期存在的问题,在进化生物学中至关重要,因为它决定了蛋白质进化的性质。一个简单的分析将使我们能够,首先,减少不切实际的蛋白质空间大小~10^130个序列,对于100个残基的多肽链,~10^9个功能蛋白质,其次,估计每个氨基酸的稳健平均突变率(x ~1.23),并根据蛋白质的边缘稳定性,从它推断出在任何一个时间只有一小部分序列可用于功能蛋白质的进化。虽然这一结果并没有解决蛋白质空间广阔的问题,但它将其框定在一个更合理的框架中。

英文摘要:

An accurate estimation of the Protein Space size, in light of the factors that govern it, is a long-standing problem and of paramount importance in evolutionary biology, since it determines the nature of protein evolvability. A simple analysis will enable us to, firstly, reduce an unrealistic Protein Space size of ~10^130 sequences, for a 100-residues polypeptide chain, to ~10^9 functional proteins and, secondly, estimate a robust average-mutation rate per amino acid (x ~1.23) and infer from it, in light of the protein marginal stability, that only a fraction of the sequence will be available at any one time for a functional protein to evolve. Although this result does not solve the Protein Space vastness problem, frames it in a more rational one.

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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