arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0807.0892q-bio.PEq-bio.BM
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基因组多样性背后的驱动力

The driving force behind genomic diversity

Salla Jaakkola, Sedeer El-Showk, Arto Annila

摘要:

真核生物基因组中含有大量的内含子、基因间序列和其他非基因序列,这些序列似乎没有重要的功能作用或表型表现。它们的存在是一个长期的谜团,从熵增加原理来看。根据开放系统的热力学,基因组通过各种机制向多样性进化,这些机制响应于热力学驱动力而增加、减少和分配基因组物质。进化导致了一个过度的基因组,一个高熵的生态系统,在那里,丰富的非编码片段与低水平的功能和保守的序列编码协调的活动。熵增加的速率,相当于自由能减少的速率,与自然选择的普适性标准相一致,该标准控制着基因组实体以及其他物种的种群。

英文摘要:

Eukaryote genomes contain excessively introns, inter-genic and other non-genic sequences that appear to have no vital functional role or phenotype manifestation. Their existence, a long-standing puzzle, is viewed from the principle of increasing entropy. According to thermodynamics of open systems, genomes evolve toward diversity by various mechanisms that increase, decrease and distribute genomic material in response to thermodynamic driving forces. Evolution results in an excessive genome, a high-entropy ecosystem of its own, where copious non-coding segments associate with low-level functions and conserved sequences code coordinated activities. The rate of entropy increase, equivalent to the rate of free energy decrease, is identified with the universal fitness criterion of natural selection that governs populations of genomic entities as well as other species.

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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