arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0706.2285q-bio.GNcond-mat.otherphysics.bio-phq-bio.QM
收藏

基因组序列的普适幂律行为与进化模型

Universal power law behaviors in genomic sequences and evolutionary models

L. Martignetti, M. Caselle

摘要:

我们研究了一类特殊的DNA序列的长度分布,称为5'UTR外显子。这些外显子属于蛋白质编码基因的信使RNA,但它们不编码(它们位于mRNA编码部分的上游),因此从进化的角度来看,它们受到的限制较少。我们发现,在小鼠和人类中,这些外显子的长度分布显示出非常干净的幂律衰减,并提出了一个简单的进化模型,可以解释这一发现。我们推测,这种幂律行为可能确实是高等真核生物的一般特征。

英文摘要:

We study the length distribution of a particular class of DNA sequences known as 5'UTR exons. These exons belong to the messanger RNA of protein coding genes, but they are not coding (they are located upstream of the coding portion of the mRNA) and are thus less constrained from an evolutionary point of view. We show that both in mouse and in human these exons show a very clean power law decay in their length distribution and suggest a simple evolutionary model which may explain this finding. We conjecture that this power law behaviour could indeed be a general feature of higher eukaryotes.

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。

↑