arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1108.3589q-bio.PEq-bio.GNq-bio.MN
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基因组进化有规律吗?

Are there laws of genome evolution?

Eugene V. Koonin

摘要:

定量进化基因组学和系统生物学的研究发现了几个连接基因组和分子表型变量的通用变量。这些共性包括:同源基因进化速率的对数正态分布;各种生物网络中旁系同源家族规模和节点度的幂律分布;基因序列进化速率与表达水平之间的负相关性;基因功能类与基因组大小的差异标度。基因组进化的普遍性可以用简单的数学模型来解释,类似于统计物理学中使用的模型,比如出生-死亡-创新模型。这些模型没有明确纳入选择,因此,观察到的普遍性不似乎是由选择塑造,而是基因集合的涌现属性。虽然进化生物学的完整物理理论是不可想象的,但基因组进化的普遍性可能符合“进化基因组学定律”,就像现代物理学中理解的“定律”一样。

英文摘要:

Research in quantitative evolutionary genomics and systems biology led to the discovery of several universal regularities connecting genomic and molecular phenomic variables. These universals include the log-normal distribution of the evolutionary rates of orthologous genes; the power law-like distributions of paralogous family size and node degree in various biological networks; the negative correlation between a gene's sequence evolution rate and expression level; and differential scaling of functional classes of genes with genome size. The universals of genome evolution can be accounted for by simple mathematical models similar to those used in statistical physics, such as the birth-death-innovation model. These models do not explicitly incorporate selection, therefore the observed universal regularities do not appear to be shaped by selection but rather are emergent properties of gene ensembles. Although a complete physical theory of evolutionary biology is inconceivable, the universals of genome evolution might qualify as 'laws of evolutionary genomics' in the same sense 'law' is understood in modern physics.

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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