两种Elopiformes (Teleostei, Elopomorpha)基因组中两类重复DNA的进化动力学。

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Rodrigo Petry Corrêa de Sousa, Carolina Pinheiro Vasconcelos, Nayara Furtado do Rosário, Aldemir Branco de Oliveira-Filho, Edivaldo Herculano Corrêa de Oliveira, Marcelo de Bello Cioffi, Marcelo Vallinoto, Gláucia Caroline Silva-Oliveira
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引用次数: 0

摘要

鱼形目包括中型到大型的鱼类,分布在公海、沿海和河口水域。Elopiformes被认为是进化研究的优秀模型,因为它们具有充足的适应能力,这使它们能够利用一系列不同的生态位。本研究分析了两个Elopiformes物种(Elops smithi和meggalops atlanticus)的两类重复DNA(微卫星和转座因子)的核型结构和分布。结果表明,微卫星序列在这些物种中具有非常相似的分布,主要与异染色质(着丝粒和端粒)有关,表明这些序列有助于染色体结构。相反,在整个常染色质区域检测到的特定信号表明,其中一些序列可能在基因表达的调控中起作用。相比之下,转座因子在两个物种中表现出明显的分布,这表明这些序列在两个物种基因组中的功能可能存在种间差异。因此,比较基因组定位提供了新的见解,以了解这些重复序列的结构和组织在Elopiformes基因组。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolutionary Dynamics of Two Classes of Repetitive DNA in the Genomes of Two Species of Elopiformes (Teleostei, Elopomorpha).

The order Elopiformes includes fish species of medium to large size with a circumglobal distribution, in both the open sea, coastal, and estuarine waters. The Elopiformes are considered an excellent model for evolutionary studies due to their ample adaptive capacity, which allow them to exploit a range of different ecological niches. In this study, we analyzed the karyotype structure and distribution of two classes of repetitive DNA (microsatellites and transposable elements) in two Elopiformes species (Elops smithi and Megalops atlanticus). The results showed that the microsatellite sequences had a very similar distribution in these species, primarily associated to heterochromatin (centromeres and telomeres), suggesting these sequences contribute to the chromosome structure. In contrast, specific signals detected throughout the euchromatic regions indicate that some of these sequences may play a role in the regulation of gene expression. By contrast, the transposable elements presented a distinct distribution in the two species, pointing to a possible interspecific difference in the function of these sequences in the genomes of the two species. Therefore, the comparative genome mapping provides new insights into the structure and organization of these repetitive sequences in the Elopiformes genome.

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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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